Leaf Springs for Drag Racing
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- Опубликовано: 15 июл 2020
- Leaf springs for Drag Racing can and do work!
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While not as popular as a coilover spring setup, the leaf spring rear suspension with Caltracs or ladder bars or Assassin bars definitely can launch a drag car or truck and make some impressive times!
This video discusses running a split-mono leaf spring, with rear slider and Caltracs by Calvert Racing or running a rear axle housing floater kit with split-mono leafs, rear slider and ladder bars or 4 link bars. I also discuss how to add bite with caltracs or remove bite. Eliminating wheel hop is key with leaf springs. The real decision if you choose to stay with leaf springs and not convert to coilovers is running a Caltrac setup or going with ladder bars or 4 link.
Samson Performance of Sam's Alignment in North Charleston, SC:
Get with us at our shop to let us help you scale your car and do a complete plot of your car as it is today and then we can discuss what changes, if any, we would recommend. We do drag car chassis tuning, chassis setup and ensure the suspension is setup for the best drag racing launches possible! We also offer online remote services from our website here below:
samsonperformance.com/service...
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Drag Racing Suspension and Instant Center Calculator:
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Calvert Racing Split-Mono Leafs:
www.calvertracing.com/splitmo...
Caltracs:
www.calvertracing.com/caltrac...
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Smith Racecraft Assassin Bars:
smithracecraft.com/product-ca...
Sliders:
www.calvertracing.com/store/sl...
Housing Floater Kits:
swracecars.com/product/rear-a...
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Amsoil Products for all your high performance needs:
www.amsoil.com/?zo=5439621
#suspension #dragracing #coilovers #noprep #horsepower #chassis #kevinwilsonsbc #dragcar #shocks #streetracer #streetrace #instantcenter #leafspring 
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This is the absolute best video I’ve ever seen on RUclips as far as a performance video!!!!
Well done!!!
Andy Jones thanks so much for your comments and encouragement! Go fast, go straight! Be Safe!
You explained this the best I ever heard and I now have a better understanding than I ever have.
Thank you for a great informative video on caltracs. I recently bought a 69 roadrunner already set up with the caltrac and split leaf springs. Again thank you for explaining how they work and how to adjust them
I am in the process of setting up my 64 Plymouth with Caltracs and Split Mono Leafs, You really have taken the mystery out of this set up. Thank You for your time and video, It will be a massive help.
Scott Escobar thanks so much for your comments! Go fast, go straight! Be Safe!!
Many have tried, but your the first person who has made it make sense to me! Thanks dude! :)
Glad I could help! Thanks!! Go fast, go straight! Be SAFE!!
By far the best channel I’ve ever seen at describing and explaining race stuff. Wish I had someone like you nearby to consult and talk to about race cars😂although I know absolutely nothing compared to you
Hey Kevin man you did a great job of explaining leaf spring Caltracks....you make it sound so easy.
Great info! Best leaf spring suspension video I've seen.
I rarely comment on videos but this one was so well done and so informative I feel like I had to say great job. I really appreciate you sharing your knowledge
I appreciate that! Go fast, go straight! Be SAFE!
😢😮😮😢😅😅😮😮ry6ť😮😮😢😮😮😮😮 2:46 😢😮vioujv9vovv8i🎉🎉😢😢is4454yyt4😂😢😢😮 2:46 😮
FANTASTIC.........You just answered all my questions, been having troubles with my launch....great stuff..thanks.
Lazy's Chevy V8 Racing Capri - Learn the mechanics thanks so much for your comments! Go fast, go straight! Be Safe!!
Love to hear a man that knows what he is talking about....
Love the way you describe things. Thanks very much.
I appreciate you sharing your wisdom with us. Thank you
Thanks for sharing great info n ur knowledge to help us enjoy what we love Kevin
Fantastic education! Thank you very much. I have Caltacs on both my cars. One has single adjustable shocks and you are right - they don't work. The only way I can stock the wheelhop is setting them at full stiff 10. They are Rancho (Caltrac) shocks and it rides like a cement truck if I forget to put them back to 5. That car has way too much pinion angle. I can see the front of the yoke pointing down and what this does is make it hit the tire WAY too hard. I need to cut the perches off and start over or use pinion angle wedge shims.
Thanks for the information on leaf springs really helped me out alot
Lance Burk thanks so much for your comments and support! We love the leaf spring setups and they absolutely do work!!! Go fast, go straight! Be Safe!
Nice job Kevin. Very interesting information
Scott Nettell thanks so much for your comments! Go fast, go straight! Be Safe!
Theres actually a lot here I didn't know and some things ive only theorized in my head about. All the installation videos ive seen rarely talk about preloading, they usually stop after the ride height, dime gap. If i continue to build my 75 nova ill be doing the caltracs. I was not aware of the importance of the rear sliders. Thanks for the info
MAN THAT WAS A GREAT EXPLANATION, THANKS
Mike Condoluci thanks so much for your comments! Go fast, go straight! Be Safe!
Awesome ,I need more bite ,I smoke the tyre 2.5 turns lower hole now to try top hole.
Thank you this is awesome instruction video
Awesome video boss. Thanks so much for your time and expertise on this subject. Greatly appreciated
My pleasure! Go fast, go straight! Be SAFE!
Really appreciate the info.. hoping to get this s10 rolling soon
Awesome video , I’ve ran caltracs for roughly 20 years on both my cars , very good informative video . Only thing is with mopars(which I run) you actually want to have a dimes worth of air gap on the front pivot . Mopars have a very short front segment on the spring and they don’t like a lot of preload , talking to John Calvert many years ago this is what he recommended , I run that airgap in a 9.90 5 spd duster .
Kitimatwinterhawks thanks so much for your comments about the short segment on the mopars! You got the 5 spd hauling some groceries for sure! Go fast, go straight! Be Safe!
Mopars dont need caltracs to work . I threw mine out and went back with factory as springs and my own bar set up I ran in the 70s . Car hooks as good if not better now .
@@darwinfoster7420I’ve seen a fair amount of this. I haven’t been involved so dk if they are messing up the pinion angle of getting the wrong spring rate or what, but see a lot of big winners go back to the stock mopar setups
I also found out once I put the Cal tracks on. The car could put a lot more power down out of the turns! Wasn't expecting that but the first time I took the car road racing it was amazing I could use twice the amount of power coming out of the turns without breaking the back end free!!! Bottom line is if you have a leaf spring car you have to have caltracs
Thank you so much!!! Felt a lag for power delivery and its my cal tracs have a descent air gap.
Matt Helms thanks so much for your comments! Go fast, go straight! Be Safe!!
To add to what was stated about INITIAL Cal Trac setup, always have someone with reasonably equal weight sit in the driver's seat while adjusting, along with every other "weight" (fuel/etc) the same as if you were about to make a pass, and may as well have the tire pressures set as well.
Also, a trans brake car (or one with a manual transmission) will be neutral on the starting line, but if you're foot braking an automatic either with or without a 2 step, I found my car liked the bars 1 to 3 flats LOOSE at static, because the moment you are staged and on the throttle, the housing is going to have some amount of load applied. Something you might want to experiment with if you are having issues.
yarrdayarrdayarrda thanks so much for your comments! I agree 100%. Go fast, go straight! Be Safe!!
Excellent explanation & a lot of help. Thank you😊
Franc Furian thanks so much for your comments! Go fast, go straight! Be Safe!!
Thanks for answering what the top hole is good for! Next time I’m on sub par prep I’m moving up a hole. Trying to make these radials work every where
David Walker thanks so much for your comments and don't give up! Go fast, go straight! Be Safe!
This came from my chassis guy: the top hole tends to work better for radials and the bottom hole tends to work better for bias ply. we run 275 radial pros and use the top hole.
Kevin
I got the CalTrac bars set up on the S-10. Running a well tuned stock LT-1. Wheel hop was so bad I nearly busted the wind shield. Also installed the split mono leaf springs. I bought some Toyo Proxos R888R Dot Radials and a mini spool DAY AND NIGHT DIFFERENCE!!!
The bar was nearly parallel so I moved to the top hole to get some angle to increase bite. light rear end. Need DA shocks but don’t how to order. I’m thinking the QA1 shocks. Just running stock shocks. And they have a lot of rebound but no compression.
Thanks for the very informative videos. Outstanding!,
Andy
Andy Jones thanks so much for your comments and info on your S-10! Give QA1 a call at 952.985.5675 and give them your S-10 info and they can get you the part number you need for the double adjustable shocks if you have all the stock mounting locations still in place. Calvert Racing at 661-728-9600 wold also be a good place to start. Keep me posted! Go fast, go straight! Be Safe!!
Gained another subscriber today great job my man🤘
Wow great advice & knowledge , thanks for sharing 👍🏼
R R thanks so much for your comments and encouragement! Go fast, go straight! Be Safe!!
Great video!
Thank you very much. I am new to drag racing (had tons of fast cars). I have a '72 Nova, 461bb, th400 w/ tb, 3.90 gears running 275 radial pros. Due to being new, I went to a pro to set the car up for me, but I know that in order to get the car to work on different surfaces, I'm going to need to know how, why and when to make adjustments. The car has caltracs, split mono w/ sliders, afco big gun DA's in the rear and menscer DA's up front. I consider the car slow (100mph 1/8 w/ bottom 1.5x 60s).Bar is in the top hole. But I'm using this year to learn as much as possible, because we've already started building a 582 for next year. I haven't touched the caltracs, the car goes straight. But I felt accomplished last time out because I made adjustments that worked immediately. The front extension was tight, not much lift, and the rear extension was loose, separating immediately causing the tire to grab, unload, spin, then grab again and go. I loosened the extension quite a bit and tightened the rear extension a little and my next two passes were my best 60s yet.
Nice job!!! You got this! Go fast, go straight! Be SAFE!!
Sir all I can say is perfect. Now I know how they work and how to adjust off the hit with the front in the air.
Chris Bergeron thanks so much for your comments! Go fast, go straight! Be Safe!!
This video helped me understand a lot to how this whole thing works thank you ! I was completely off on my thinking lol…
I’m Running a VAS traction bar kit on my truck the bar is on the hole closest to the leaf spring the bar looks parallel to ground Will lowering the bar below the differential (off setting it lower) work the same to adding more bite anti squating
1slow02 thanks so much for your comments! Go fast, go straight! Be Safe!!
Excellent tutorial . Thank u sir
Awesome info & well presented.
Tim's Insanity thanks so much for your comments! Go fast, go straight! Be Safe!!
Thank you so much for this video
Leroy Tapia thanks so much for your comments and you are welcomed! Go fast, go straight! Be Safe!
Great video
Teflon plated sliders are used in dirt racing they do great at not making noise
Jeremy Pike thanks so much for your comments! Go fast, go straight! Be Safe!!
Good video, great teacher
Thank you! 😃 Go fast, go straight! Be SAFE!
Getting ready to switch from stock leafs to a mono leaf set up with caltracs, thanks for the info.
Todd Dunham thanks so much for your comments! Good move for sure!!! Go fast, go straight! Be Safe!!
Only one bit of information for you. If you have any kind of power and torque. With the caltracs you will be looking at stars. Ripped the bumper off my 72 Nova at the track.
@@jamespaul4731 will 530-550 horsepower to the rear wheel in a 80 Trans Am have me looking at the stars with the caltracs?
Great informative video thanks
GREAT vidio Kevin!!
Jim Nelson thanks so much for your comments! Go fast, go straight! Be Safe!!
Been running caltracs for a few years they do work great when you get them set up sliders work better at 4/6 degree angle.
Camaro Drag Racing Second Generation thanks so much for your comments! Good advice snuck in there!! Go fast, go straight! Be Safe!!
I had mine so many years, back on the old 67 Camaro BBC...
They didn't have sliders back then guess I need to upgrade...
I'f one is looking for grip in low initial traction situations like street/no prep with radial tires....would a lighter rate allow more work to be done via movement?
That is to say if everything was taken off the car but the leaf, would not a lower rate leaf allow the maximum body separation, the more inches of separation the more travel you can manipulate with rebound?
Allowing one to not hit the tire as hard and in a way providing providing more travel to work with in a similar way to having more front end travel?
I would love to see you do a slapper bar vs Caltrac video, you have talked about your dad starting out drag racing with home build slapper bars, lots of guys still run them, I need somebody to convince me that Caltracs will be better than slapper bars and why.
Kevin, I need advice installing spring sliders on my 67 Camaro with Caltracs. How far apart? What angle? Where should the leaf eye bolt sit in the slider while car is at rest? There's not much info available for installing these properly. Thanks in advance.
Great Video!
Thanks Kevin, when do I need to run a panhard bar/wats linkage with floater / ladder bar? I notice most leaf springs are not parallel , is this enough to not require a panhard? thanks man
Thank you 👍👍
Excellent video
Jack Collier thanks so much for your comments! Go fast, go straight! Be Safe!!
the idea is to maintain preload evenly on the wheels pushing down without bouncing, shocks do that. bite?, this bar.. essentially locks the rear end and only allows axle wrap, and twists the frame, especially with solid mounts.... simple geometry
I think it’s slowly sinking in. Thanks for all of these excellent explanations and examples.
Love the video, any advice for weekend drag races with diesel trucks I have caltrec bars on back looking for adjustable shocks drag/ street mods
Rodger Bishop thanks so much for your comments! Strong valving is your friend with tons of torque!!! Go fast, go straight! Be Safe!!
Good info thanks.
Aj Richards thanks so much for your comments! Go fast, go straight! Be Safe!!
Also don't forget about the Assassin bars. They give you a bit more adjustment, which yes can get some people in trouble, but the key thing we and others have found is that when you start putting big/more power down, the Caltracs tend to bend the leaf at the contact point where the Assassin's do not as the contact point is moved to the spring eye.
Dave67 thanks so much for your comments! The Assassin bars absolutely are good products! My bad for not including them in the video. Go fast, go straight! Be Safe!
@@KevinWilsonSBC Don't get me wrong, I enjoyed the video. Your explanation was very easy to follow and should help take some of the fear of chassis tuning away. Good on ya for giving real tech and got yourself a subscriber! 👍
Great video! Extremely educational and great presentation!
What if I'm running 3 inch lowering multi leaf springs from hotchkis can I still run a Caltracs set up or should I ditch them for a mono leaf spring ?? Awesome explanation. Subscribed!!
Moses Andres thanks so much for your comments and question! I have not ran the hotchkis leaf springs before so I would recommend you give them a call. I did check out their documentation and that don't really address the caltrac type setups. I am big fan of the mono leaf springs for full track use. Go fast, go straight! Be Safe!!
Have you made a video on choosing the right size tire and rim when sitting up the suspension
I will add that to the list. Go fast, go straight! Be SAFE!
any advice on what would help on a drift truck? i have a 91 toyota pickup, welded differential, belltech 3" drop leafs, and kyb shocks. while sliding sideways im not feeling wheel hop but as soon as i come out of a corner and have to transition to a straight, then back into a corner, i catch so much wheel hop that i have to almost brake to a deadstop and clutch kick again to swing out the rear. i know caltracs help with keeping that pinion angle correct but will they help with lateral movement? would a set of caltracs paired with a HD sway bar help? im going to go 4 link with watts later on once i finish piecing together my v8 swap/ford 8 inch SAS. but for now id like to stay true to leafsprings since im only making around 120 hp/135 ft lb of torque. i appreciate your time Kevin.
I-O GARAGE thanks so much for your comments! I have never drifted... well on purpose that is. Sorry. Go fast, go straight! Be Safe!!
What kind of pinion angle do you like to see with leaf springs? I'm running split mons and the smith racecraft assassin bars. Thanks
Joe Schmo thanks so much for your comments! Checkout the video I just released for Part 2 Leaf Springs. ruclips.net/video/WcA5xQGWpuY/видео.html Go fast, go straight! Be Safe!!
I have been watching your videos on leafsprings and was wondering what you might be gaining with adding a hole in the calvert spring plate under the leaf springs above the factory one they use? Just trying to get all the separation I can get and wanted to know since you spoke about it but didn't really say what it could do.
Generally the more uphile the caltrac bar is from the rear end going toward the chassis, the more you will help with separation of the chassis and pushing the rear end toward the track. If you flatten the bar getting it closer to level, the less upward tq being applied to push the chassis up and the more you are helping drive the chassis forward. However, the big factor is the location of the front spring mount and if you are allowing enough motion on the rear leaf spring mount. So if you are really wanting more separation, make sure the rear leaf spring mount is free to move and there is enough movement in the rear to allow for more separation. If the rear spring mount cannot move forward or forward and down more, then you are effectively done separating. This is really key hence all the focus on sliders or hangers that are canted back at ride height so you have more movement to allow the rear end and spring to continue down toward the track more.
Go fast, go straight! Be SAFE!!
Any good recommendations for a drag style leaf springs for a 71 challenger? I enjoyed the video
1997LT1Camaro thanks so much for your question and comment! We have used Calvert leaf springs a bunch with great success. Here is a link, but give them a call and discuss your application, calvertracing.com/product-categories/springs#Dodge Go fast, go straight! Be Safe!!
this is what i have been looking for in a video. i have been power watching your rear set ups for leaf springs, i have a full size F150 and the springs are over the rear housing. i have latter bars on it now and it hooks up very well, ( they are NOT mounted in a traditional manor, upside down and split mount.) my question is this, how would you make a latter bar work on this setup? would you use the slider in the same way on the spring?
Not sure I am following you exactly. Can you shoot me an email at samsalignmentsc@gmail.com so we can discuss more. Sounds like you have ladder bars now that are working well but you are wanting to know more about sliders regarding springs on top of axle. This will be easier over email and you provide pictures of your current setup. Go fast, go straight! Be SAFE!!
Great video.. i'm putting caltracs on a 62 plymouth this weekend (and probably next weekend as i'm moving the springs a bit), The car is just gonna be for stoplight fun on the street, any issues with them on the street? Keeping shackles in the back, figured slider noise would be annoying.
Sounds great! No issues at all with Caltracs on the street!
Go fast, go straight! Be SAFE!
Kevin in reviewing the video of the first trip to the track I noticed the bed of the truck came up. If the old theory is right when the bed was coming up there was certainly pressure being applied down as well. As I mentioned in a previous comment the truck left great but still spun some. Of course we want to go faster. We are going to add power over the winter. Would double adjustable shocks keep the the bed from rising in order to put that pressure down on the tires? I moved the the cal trac bar to the top hole because the S-10 had the CT bar pointing downward to the front of the truck. I’m running the stock shocks but want to add the DA/QA1 shocks
Thank you again for these outstanding videos.
This shows your love of the sport and willingness to help others along the way!!
Andy Jones
Andy Jones thanks so much for your comments! Absolutely get some Double Adjustable shocks Call Calvert Racing and let them help you get the shocks you need for your S-10. Go fast, go straight! Be Safe!!
If it left good then spun that's where a double adjustable shock helps. You can add more compression to keep the tire planted. Also dont overlook adding more tire pressure. Most of the time low air pressure will hook initially, squat the tire, then bounce back up and spin the tires. Get DA shocks and add tire pressure to get rid of tire bounce. Great video btw Kevin.
Kevin an I correct in understanding from your videos that if you were setting up a new car from scratch and had your choice of rear suspension types 4-link would be your #1 choice?
ratheal watford thanks so much for your question! For a drag car yes it would be a 4 link. Go fast, go straight! Be Safe!!
Leaned alot, thanks.
How does moving the bar on a caltracs change the instant center? The instant center is the where the front of the spring is mounted.
The only thing that bar does is leverage on the spring and keep it straight.
On that floater do you suggest oiling it from time to time?
Just wondering is the squatline a line parallel to the bottom Caltrak bar was curious about where the other end of the line goes to is there a target on the chassis to aim for?
You should do a video on the assassin bars by smithcraft!!
Brock Gibson thanks so much for your comments! I will get a video out on them for sure. Thanks! Go fast, go straight! Be Safe!!
I haven’t build my shock mounts and got shocks on it but my Isuzu pickup the single leaf bows in the center with weight on it. Will getting my shocks added to the rear remedy that or do I need to look at getting some new leaf springs?
I encourage you to get the 4 corner weights and then talk with the leaf spring manufacturer. Installing shocks will not remedy that. Go fast, go straight! Be SAFE!
Kevin Wilson I thought if you don't have scales to adjust by corner weight, you are suppose to sit in the drivers seat and then preload the Caltracs evenly. I put an empty 351C bare block with caps in my drivers seat and a set of bare Cleveland 4v heads on the floor board in my 70 Cougar. I'm 230lbs so I figured that would be close enough weight to start with.
The main takeaway is to be consistent on how you check the preload. That establishes a baseline from which you can now make educated changes. Then test and evaluate. Go fast, go straight! Be SAFE!
I'm running a Frankland QC with a Bicknel torque arm. I'm guessing the physics are the same?
Acceptional video series on suspensions. Bios ply?
so you think that this is better that using the mopar superstock spring
Could you explain what situation where you would take bite away on a Cal Trac car? I've always run mine in the upper hole, never enough time to experiment on race day and street legal track prep is lacking to say the least.
yarrdayarrdayarrda thanks so much for your question! The only time I would take bite away is on a very strong prepped track with a slick. We have had the best success with running the top hole on the spring shackle side on the cal tracs. Go fast, go straight! Be Safe!!
Top video thank you
dwayne boan thanks so much for your comments! Go fast, go straight! Be Safe!!
How do sliders do on the street? Like daily driver street?
Thanks awesome information
18f150tvs thanks so much for your comments! Go fast, go straight! Be Safe!!
Can you lower the back bar to add more bite if you don't have multiple holes on the front?
Yes that will help!! Go fast, go straight! Be SAFE!!
@@KevinWilsonSBC Thanks for the reply I'm going to try that next.
Kevin I have 66 fairlane with cal.tracs and mono spring in rear I have stock shackle its a street strip car will t h at work
Ed Oetzel thanks so much for your question! At a high level, yes it will work. Of course, there is a good bit more about the car that goes into this equation, but sounds like a pretty common setup. Go fast, go straight! Be Safe!!
Regarding shocks on a split mono leaf/Cal Trac car, I've been running mine forever starting with stock shocks, moving up (or so I thought) to Koni SPA-1 drag shocks with reasonable success. (best of a 1.34 60' time) When the track is marginal, the 60' times go for crap, along with the round loss. (bracket car) Yesterday I was ordering parts for the Camaro and I started thinking about updating my rear shocks. I stumbled on full tight being what worked for me and never changed the setting, and when I stroked the shock yesterday I realized the extension is very tight, but compression is basically non existent. I think that explains why I had traction issues on marginal surfaces. It will load the tire initially, but won't maintain it since the shock has zero compression damping. I ordered a set of QA1 double adjustable stocker star shocks for the back with the intention this year of hitting the marginal street legal nights and test until this car will hook in the burnout box. I wish your video was around 10 or so years ago when I bought these Koni shocks, I would have known to spend double the money to buy the correct shocks instead. Cheers!
yarrdayarrdayarrda thanks so much for your comments! You are spot on with the rebound and compression valving needing to help keep control of the tire and suspension! Keep me posted on how it goes! Go fast, go straight! Be Safe!!
@@KevinWilsonSBC Snow on the ground for another couple of months so it will be a bit, but I have a new reason (the D/A shocks) to be excited for the new season. Going to focus less on the bracket events, more on the Friday night drags and actually tuning on the car. Thanks for the great informative videos!!
Would mono leaf still apply to diesel truck racing? Trucks are twice as heavy....
Ed Miller thanks so much for your question! Definitely get with a good leaf spring company for your application and based on your setup and weight they will help you get the right spring setup and combo of parts to ensure the springs are performant. Go fast, go straight! Be SAFE!
Kevin I didn’t hear it mentioned, but shouldn’t you set preload with driver weight in the car?
RT Racing thanks so much for your comments! That was an oversight on my part. Good point. Yes, all preload should be race ready with driver in the car. Thank-you for taking the time to mention this! Go fast, go straight! Be Safe!!
When you say turn the bar 1 or 2 "flats" what does that mean ? Thanks.
Tom Smith thanks so much for your question and a good question! Many bars will have a hex head welded or manufactured in into the bar to allow using a wrench to turn the bar vs using pliers/channel locks. A Turnbuckle will most likely have a hex built in also. A hex head as 6 sides so generally 2 flats will be around 1/8 of a full turn. Hope this helps explain 1 to 2 flats of a turn. Go fast, go straight! Be Safe!!
I really need to pick your brains.
I’m just starting a build, a 55 Chevy Wagon and I’m wondering which direction to go in regards to rear suspension setup.
If staying leaf spring I have to relocate them inboard to make room for a 10” tire and I figure at that point I may as well just go coil overs, also a ladder bar is appealing to me for it’s simplicity, I can easily fab up the mounts/crossmembers for both in my home garage.
My dilemma is where should the front mounts for the ladder bars be height wise in relation to the axle centre line and should I also run an anti roll bar along with a panhard bar or watts linkage?
AndyGee’s Garage thanks for commenting. Go to samsonperformance.com and shoot me an email and I will respond. Go fast, go straight!
@@KevinWilsonSBC i definitely will. Thank you for replying.
Plans have changed s little I sold the wagon and am going to look at a 48 Austin A40 sedan. I’ll email you with my plan.👍
Your video is awesome. I have a question though, why would you need to change holes to make it "bite" less or more by going up or down those holes. Wouldn't you need to have as MUCH possible bite ? Sorry for that dumb questions, I'm at the learning curve (no pun intended) so I'm trying to understand
I wish I had a Tel number to call you with all my questions. 😆
Zoi Spiropoulos thanks so much for your questions! Many factors are involved, but for example, there are times depending on the surface prep, you may need to take bite away with a slick to help wheel speed. Each car is unique so having the options to change bar angle is a nice to have. Go fast, go straight! Be Safe!!
You started to touch on a higher hole adjustment at the axle bracket. If you mount to a higher location at the rear bracket, I assume that will add even more squat?
Yes, in theory it promotes less separation. Many more factors in play for sure, but at a high level, yes. Go fast, go straight! Be SAFE!!
Hi Kevin. I apologize if this is a silly question but I searched and didn’t quite see the answer. What is the main benefit of sliders over a stock type shackle? The way I see it they both allow for and aft movement of the spring eyelet, so I don’t quite understand why a slider is better. Is it because the slider doesn’t move on an arc like a shackle, or maybe because you’d be losing the rubber bushings? I’m currently working on a Dakota that will be running mono leafs and cal trac bars and your video got me wondering if I should look into the sliders. Appreciate all of the info you’ve been kind enough to share.
Jason Pipkin thanks so much for your comments and question! The main goal of the slider is to allow the spring to have smooth lateral movement as the suspension goes through its travel on the hit and eliminate the arc of the shackle type setup. Trying to put all the energy into launching the car and not have wasted motion and/or binding of the spring on suspension travel. Go fast, go straight! Be Safe!!
Thank you sir. 🤜
My man does pinion angle change alot? Can you explain that and when is needed to add a wedge.
Mick Hipwell thanks so much for your comments! Depending on ladder bar, caltracs, etc... yes, your pinion angle will change. Checkout ruclips.net/video/798hp4WpWv4/видео.html and ruclips.net/video/q8e9p5UYgww/видео.html Go fast, go straight! Be Safe!!
I have really bad axle wrap and wheel hop, just took my 65 Dodge to the track for the first time last weekend in Julesburg. I want to purchase the Caltrac system kit with adj shocks. However, I’ve heard that Mopars don’t typically use Caltracs, is this true? I have a grand now to spend but not sure if to buy HD springs or Caltrac kit with adj shocks. Any info would be much appreciated. ( it’s a 14 second car now, goal is to mid 12’s someday)
Max Wedgie thanks so much for your comments! Absolutely on the Caltrac kit! Go fast, go straight! Be Safe!!
How about the leaf spring on top of the axel for drag racing?
Timothy Gambino thanks so much for your question! Very doable, but I have not done it very often except on HD trucks that want to go to the track and embarrass some door cars. You can visit this link to get more info: calvertracing.com/product-categories/caltracs-trucks Go fast, go straight! Be Safe!!
How much travel should you expect from the leaf spring in the slider and what manages the travel?
joe hlavaty thanks so much for your question! The travel is dependent on each car and how much separation the car has in it. Here is a cool video from under a car on the hit with sliders: ruclips.net/video/Vp1edw96lVs/видео.html The rear "floats" per se', but the front of the spring is solid mounted, so the goal is to allow the spring to move as needed under load to not bind the spring. Go fast, go straight! Be Safe!
Kevin Wilson thanks for the reply. Preload will soften the hit ?
At what point do you think all the fancy leafs and bars are needed? I run 6.50s 1/8 mile with stock leafs and slapper bars! Lol it 60ft 1.43-44s. pulls both fronts 6" and rides out
J Bevins thanks so much for your comments! If it ain't broke, don't fix it! We have had stock stuff and slapper bars in the 1.32 60' all day long. Go fast, go straight! Be Safe!!
Without the rear slider on a leaf spring setup (Caltracs 3500 lb car) what should the preload be?
Scott Justus thanks so much for your comments! That depends on your setup. I always start with what calvert recommends as a starting place. Barely touching or very thin (sheet of paper then) gap. Then test and adjust. Go fast, go straight! Be Safe!!
Having troubles finding a manufacturer for a set of monoleafs for my falcon. Any suggestions. Culvert has a split but cant find a true mono
Derek Mckay thanks so much for your question! Those are going to be tough to find for sure. You may want to check out some ford forums for sure. Sorry I am not much help to you. The Calvert Split mono's definitely work!! Go fast, go straight! Be Safe!!
Does it hurt to scale your car using caltracs? By this I mean pre-loading the caltracs to make the weight equal left to right?
Chevy 2 Adam thanks so much for your question! Great question by the way. I highly encourage you to scale the car using caltracs. Here is what I mean though. If you have scales, or access to scales, scale the car with the caltracs neutral, just off the springs and equal distance from the springs then document all scale weights, including front weights. Then, while the car is on the scales, adjust the caltracs as Calvert recommends, recheck scales and document scale weights. Then make a pre-load change and document scale weights again. My point is, use this as an opportunity to see exactly what is happening at each change point so if you have to make changes when not sitting on scales, you know what is going on with each change if you are having to correct something on the hit. I can say we have had some tremendous success with caltracs and 90% of the time we have rarely had to get too far past what they recommended on a starting point. Regarding weight equal left to right, I am not sure if you are shooting for the same corner weights on the rear. If that is what you mean, I would be careful trying to balance left and right rear to equal weights unless you are correcting an issue with how the car is driving on the hit. Not in all cases, but most cases, you will be a little heavier on the left rear to help make sure the car drives straight on the hit. If you need more info shoot me an email at samsalignmentsc@gmail.com and we can go into more detail with your car. Go fast, go straight! Be Safe!!
@@KevinWilsonSBC Awesome! This makes perfect sense! I know what I'm doing this weekend haha. Thank you for taking the time to answer! Merry Christmas!
So my main question is what is the difference between the Cal track system and running a rigid ladder bar instead of a pivoting Cal track system? To me the only difference is you’re not letting the pivot hit the leafspring to work off that it’s rigid to keep it from flexing to push the car forward correct
William Lutz thanks so much for your comments! Part 2 video coming this week!! Go fast, go straight! Be Safe!!
What will a 2" lowering block affect a Calvert system ? Thanks
Ted Farlow thanks so much for your question! More upward bar angle will lead to more separation. Contact Calvert to make sure you are following their guidelines though. Go fast, go straight! Be Safe!!
@@KevinWilsonSBC Thanks, very straight forward and very informative.