Drag Racing Suspension | Body Roll Issues | Wheelie Bars Unloading Slicks
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- Опубликовано: 18 окт 2024
- Drag Racing Suspension Tuning by simulating wheelie, Rear Body Roll Issues, & Wheelie Bars Unloading Slicks on the hit with the blown sbc 48 Ford Coupe!
We uncovered some real issues showing why we are unloading the left rear slick so hard!! The rear Anti Roll Bar is absolutely critical, but many confuse how to adjust the ARB for body/chassis roll issues! I show you the changes and actual scale weights with before and after scale weights!!
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This video covers everything we found and how we fixed it along with full scale weights disclosed to show the results. We also examine and show how much weight the wheelie bars take on and remove from the rear slicks. Wheelie bar stagger is amazing at the shifting of weight and it moves weight fast!
Scales used:
amzn.to/2M1e7XF
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Full Suspension Series Playlist to walk through extensive drag racing suspension tuning:
• Suspension Tuning and ...
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Get with us 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 also offer online remote services from our website here below:
Samson Performance of Sam's Alignment in North Charleston, SC.
samsonperforma... - This site has our email to contact me for suspension tuning.
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How to setup double adjustable shocks and springs for drag racing. How to tune rear shocks for drag racing also known as tuning coilovers for drag racing. Drag car alignment is critical as you know for your safety and the safety of the other driver.
Samson Performance of Sam's Alignment in North Charleston, SC.
samsonperforma... - This site has our email and shop info along with remote services
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Amsoil Products for all your high performance needs:
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#suspension #dragracing #coilovers #boost #horsepower #qa1 #kevinwilsonsbc #dragcar #bigtire #streetracer #streetrace #suspensiontuning #noprep #smalltire
While I am not able to replicate the twisting torque of the motor on the left front, nor am I able to emulate the extensive twisting of the rear end on the hit, I think this experiment with the scales show some very interesting data from which better decisions can be concluded on my issue of planting the right rear and actually unloading the left rear. Not saying you should go do this at all, but watch the video, see the weights move and then better understand how you can apply this to your car or other cars, if needed. One big danger is watching a video like this and then trying to apply it to every car. We will see soon how the 48 Ford reacts to these changes at the track. Thanks all for the comments and please stay tuned!!
Never apologize for what you’re doing here! I wish my dad would have been interested in what I do racing wise, and be a part of it. My old man always said “going straight ain’t driving. There’s no thinking or skill in that!” He never once came to watch me race. Treasure your dad, as you do. You’ll never get enough!
Layton Turpin thanks so much for your comments! I appreciate you sharing that with me. Go fast, go straight! Be Safe!!
Love the way you thoroughly explain things. Keep doing what you are doing.
hpjunkie69 thanks so much for your comments! Go fast, go straight! Be Safe!!
Wow, that's amazing Kevin!! Never would have guessed so little could mean so much!! What an education, thanks Kevin, I keep getting smarter after listening to your videos!
Patrick M. thanks so much for your comments! Go fast, go straight! Be Safe!!
Kevin, don't change a thing the way you teach. I have grasp more this week end then i have in the past year. Thank you!
Gordon Pulley thanks so much for your comments! I appreciate your kind words!! Go fast, go straight! Be Safe!!
i did every thing minus the wheel bars and it work thanks kevin much respect and having a dad is awesome. thanks for the video
I've never adjusted suspension for drag racing yet, but what you did to the arb is what I would have considered the logical move. I don't understand why people would think the other way would help.
Phil thanks so much for your comments! I am with you, but for some reason many get confused on this ARB with body roll. Go fast, go straight! Be Safe!!
WOW! I would never have thought 3/8's of an inch on one wheelie bar would make that much difference. Thanks for sharing.
Michael Lone thanks so much for your comments! Yes, me too! I just cringe when I see people cranking on adjustments thinking more is better. With the horsepower/torque these days, making smaller, measured changes is better and SAFER. Thanks for taking the time to comment! Go fast, go straight! Be Safe!!
Great teacher, thank you for all this info, can't wait for next year
Keller Hogan thanks so much for your comments! Your words are kind and appreciated! I am excited for next race season!! Go fast, go straight! Be Safe!!
Really enjoyed the parts about the roll bar and wheelie bars! Liked and subscribed.
First...that's a great looking car...looks like it means business! The weight measurements really knocked my socks off. I would never have expected any reduction in weight on the rear when you jacked the front up. I was expecting some left/right balance difference but I was expecting both numbers to go up. A real eye opener. Thanks!!!
Yeah I agree! That was an interesting test and results... Thanks for commenting and supporting the channel! Go fast, go straight! Be SAFE!!
Well done. It's a big puzzle with a lot of pieces missing. your doing a great job finding them.
Tim Groleau thanks so much for your comments! Go fast, go straight! Be Safe!!
I appreciate you taking the time to explain it. It's the perfect speed for me. This vlog is a 'must see.' Should be a stump puller out-of-the-hole. Thank you.
nolan engineering thanks so much for your comments! Go fast, go straight! Be Safe!!
Preciate the knowledge. I am having this same issue right now and will be trying this method but also will be reaching out to you guys for some tuning help.
Thank you for sharing your knowledge it will definitely help tune my car
Michael Taylor thanks so much for your comments! Go fast, go straight! Be Safe!!
great videos . with your help took a car that wouldn't go down the track to finishing fourth in our club . brand new car!
Andrew Thorpe thanks so much for your comments and encouragement! I have enjoyed watching all your progress for sure!! Go fast, go straight! Be Safe!!
Hi Kevin...thanks I did pick up that nugget and more. The only thing I could add is to be careful because on the track, the load that the jack was carrying will be transferred to the wheelie bars and tires in proportion to the location of the CG to each contact point. Can't wait to see the next track run! Be Safe.
john casey thanks so much for your comments and I agree. Cannot wait to get back out and capture some more video. Go fast, go straight! Be Safe!!
super great videos .i have a 63 falcon 393 stroker you made my problems become clear as day.thank you and have a wonderfull christmas with you family cant wait to see the next run of the car.
John Roach thanks so much for your comments and feedback! I would love to see some pics of the 63 Falcon or even some videos! I love the nostalgia side of drag racing while mixing current day tech. Merry Christmas to you and your family as well! More videos soon. Go fast, go straight! Be Safe!!
Hey thanks for the show you're teaching at the speed I can understand you're not going too fast or over my head so thank you so much you're crystal clear the way you do everything don't listen to the naysayers
Dale Chirstopher thanks so much for your compliments and for taking the time to leave a comment. Go fast, go straight! Be Safe!!
Excellent presentation !
Thanks so much, Herb!! Go Fast, go straight! Be Safe!
Awesome data sharing and correction. Proof that data is king! Thanks for sharing!
Big-J thanks so much for your comments! Without scales and seeing your changes on the scales, it is really difficult to understand how fast weight moves and much impact it has on the hit with things get so violent on the suspension. Go fast, go straight! Be Safe!!
thanks mate great advice
Bombs Away - Multiplayer Records thanks so much for your comments and taking the time to leave a comment! Go fast, go straight! Be Safe!!
Useful informations
Thank you Kevin.
Ali Almahasna thanks so much for your comments! Go fast, go straight! Be Safe!!
Gr8 Info Kevin. I'm getting into No Prep Dragging, but with RC. heh. Everything you apply in 1:1, is almost exactly what is needed in the 1/10th NPRC,
Which has much of the same setups, except the wheelybards are not off axle but off rear motor mount on the trannies with rear motors, and separate chassis mounted wheelie bars on the mid motor rigs.
I am also gathering the parts to make a scale car with an axle. In RC they use a Short Course Low Center of Gravity Chassis.
Its pretty cool stuff no doubt. You should look into it for shitz and grinz.
just search youtube for No Prep RC or NPRC.
Thanks again for this info. It will help me setup my rigs to bring home some cash. lol
Timothy Locke's Perception Deception thanks so much for your comments! I will have to check out the RC scene soon. Go fast, go straight! Be Safe!!
good advice enjoy your video's very informational keep um coming
Jeff Warwick thanks so much for your comments! Go fast, go straight! Be Safe!!
Great information and real❤❤
I love your videos just using your advice on spring selections and shock installed height as dropped my 60 a bunch.
Antwan Lumpkin thanks so much for your comments! It is awesome to hear about your progress and glad the videos have helped you! Keep me posted for sure! Go fast, go straight! Be Safe!!
Excellent Video we’re having the exact same issue can’t wait till next race season starts now!! 🚙🏁
David Plater thanks so much for your comments! One thing I hope you took away is how fast small changes move weight around. With the ARB change, I may actually lessen the 75'ish lb spread to more like 30 lbs. The car was unloading the left rear and loosing 60' and going left some before these changes, but with a 75 lb rear spread with me in it at ride height. Soon I will recheck corner weights with me in it and at ride height to see the static 4 corner weights. I will keep the channel updated. With the ARB change, I might can get the rear weights closer to even and it drive straight. I cannot wait for the stiff sidewall slicks and to get back out and test with dad. Go fast, go straight! Be Safe!!
@@KevinWilsonSBC I was hesitate to purchase scales at first but now I’m seeing the perks of having them and how useful they can be to solve chassis issues. We just fit the front struts freshened up by Strange so with that and this info hopefully our 60ft will improve also. Good stuff!!
@@PlaterMotorSports you will not regret the investment! For so many years early on we were guessing. The scales definitely help you get it closer and quicker! With the power levels today, the scales are just so crucial in knowing what is happening on your chassis. Go fast, go straight! Be Safe!!!
Hell yea bud. Good information thank you. Keep it coming. Can't wait to see how it works out.
Raymond Guzman thanks so much for your comments! I appreciate your support and kind words! Go fast, go straight! Be Safe!!
Good stuff Kevin. Questions - 1. How do you determine there is no more front or rear suspension adjustment to keep the front end down and have to use the wheelie bars to manage front end lift? 2. How did you decide to lower the right wheelie bar 3/8" and increase wheelie bar load while reducing tire load instead of raising the left wheelie bar up 3/8" to keep more load on the tires? 3. Is there a formula or load ratio between rear tire and bar load? Hope this makes sense.
TBL thanks so much for your questions! Good questions and I will keep it at a high level. 1. At some point considering the weight bias you may need to pull some power or move some weight around. With shock technology and front limiters you only have so much suspension adjustment on the front before you practically have the nose tied down on extension. The rear range eventually begins to lose 60 foot & just spin. It is a fine line between keeping the tire planted while having the physics move the car forward down the track efficiently. 2 The higher the front goes, to some degree, is simply wasting energy and ET. While my car needs some weight transfer as I have 58% of weight on the front end, to high a wheelie is just not winning races and gives more room for error if the car goes left or right. so I tend to err on lowering 1 side if I need stagger. 3. No formula as each car is just so unique. And wheelie bar lengths, deflection, etc... all are variables from car to car. Hope this helps some. Go fast, go straight! Be Safe!!
Nice!
Way over my Chassis, but great detail!
I just have slapper bars, nice to learn something every day!
Michigan Quad Trails & Tales thanks so much for your comments! Go fast, go straight! Be Safe!!
There was some great information there
Thank-you so much for taking the time to leave a comment and for being a subscriber to my channel! I don't take your views and support for granted. Go fast, go straight! Be SAFE!!
Kevin Wilson
KevinWilsonSBC
3:22 Picture a long lever attached to a super differential cover being pushed downwards until the front wheels lift off the ground. The weigh scales under the rear tires might record something interesting.
The dynamics of the launch will change the numbers much more.
There is no accounting for how much weight is on the jack under the front end.
That said, I'm very interested in seeing your results on the track.
AndreS123_03 thanks so much for your comments! I absolutely agree with you. I think this was an interesting experiment and when I saw the weight shifting around, I do believe it showed me some dynamics in play on the rear. The only real test will be the track when I send it. I will keep the channel updated for sure. Go fast, go straight! Be Safe!!
Very educational, Kevin. I assure you I tore up some Ritz crackers and cheese spread while watching this! LOL. One question: I know wheelie bar heights can be set independently side to side just as you have done to control rear tire weights. But wouldn't it be better to set the car up neutral and then only use the wheelie bars to limit wheelie height?
I remember when scaling my blown Camaro, I was very happy when I got the front end weight (with driver) within 2 lbs left/right and the left rear 50lbs heavier than the right rear. The car leaves absolutely straight and I don't have to steer it at all.
God bless you and your Dad and have a very Merry Christmas!
OneFastDuster thanks so much for your comments and question! You are spot on! I am a big believer in keeping a balance and as close to neutral as possible. I will be making more 4 link changes to take out some of the front end rise so I am not having to introduce more stagger and hopefully reduce the stagger as I don't hit the bars as hard. As a drag car rides on the wheelie bars with the front wheels off the track, they will influence steering and just a little bit of stagger goes a long ways to help correct that issue. My stock G-Body frame from just behind the driver's seat forward is not helping me on chassis deflection. Hope that makes sense. Checkout the wheelie bar video I did a while back: ruclips.net/video/jD_u4oXp8FU/видео.html Go fast, go straight! Be Safe!!
OneFastDuster just wanted to leave a separate comment and wish you and your family a Merry Christmas as well. We are so blessed, even in the midst of such crazy times. God bless you and may His peace and protection be upon you and your family! And thanks for reminding me how good Ritz crackers and cheese spread is for a snack!!!!
Thanks sir for all that😎😎!!
israel salva thanks so much for your comments! Go fast, go straight! Be Safe!!
I was thinking instead of moving weight to left tire with 4 link pre-load or the arb or the wheelie bar, tighten the spanner on the rear coil over spring. So set car up neutral and get your 70 pound spread your looking for with right rear coil over adjustment. If the car still goes left then use pre load or arb for small adjustments.
sanger440 thanks so much for your comments! There are times I have had to stager the coilover preloads for sure. But I try really hard to keep the rear chassis crossmember as level as possible so my 4 links angles are as close to the same left to right. With this ARB change, I am actually considering reducing the 70 lb spread a good bit. Stay tuned, I will have more updates soon. Thanks for the taking the time to leave a comment!! Go fast, go straight! Be Safe!!
what is the best way to address loading and unloading of the suspension? I was at the track this weekend the track was not sticky when you walk on the starting line. it would spin the grab over and over.
Dinosaur thanks so much for your question! I would recommend you watch this video ruclips.net/video/zjXTSveRzkM/видео.html as it covers many of these scenarios starting with the front suspension and includes rear suspension settings. At a high level you need to soften the rear and loosen the front. Go fast, go straight! Be Safe!!
Thanks for the videos
With lengthing the anti roll bar ends on the opposite side you want to load, I’m assuming that if you seperate the rear end (anti squat) or compress the body onto the rear end it will make a difference on which way to go?
Loco Fab thanks so much for your comments! Great question actually! My car, even though a big tire has separation, so the reaction of the rear end most definitely can & will impact this behavior on the rear ARB. I would not use my change as a recommendation for every car out there without seeing some good slow motion video of what is happening. Each car is so unique, but with a good video and if you have body rolling over the right rear like I did, then you can see how the change impacted the scales. Now for sure, like I said, I cannot emulate the rear end twisting on the hit, so I need to take these changes and test and then adjust. I am pretty confident though that I have found why my left rear was being unloaded. I hope this makes sense!! Go fast, go straight! Be Safe!!
Hi Kevin when adjusting preload on the upper passenger side 4 link what is" 2 flats of preload on the right rear upper 4 link bar " when adjusting that bar . I dont know what you mean by your wording" 2 flats " are you turning the bar two complete turns ???
joe t thanks so much for your comments! Usually on the upper bars, there is a nut welded around the bar so you can use a wrench. The nut has 6 flats. So 1 flat is just 1 flat turn. With no nuts, I would say 1/6th of 1 turn. A little moves a bunch of weight fast so scales are nice to have. Sorry for late response. Go fast, go straight! Be Safe!!
@@KevinWilsonSBC Thanks Kevin
Good video.
RCS motorsports Ron thanks so much for your comments! Go fast, go straight! Be Safe!!
I've told several ppl about you, and gave them your name.
@@rcsmotorsportsron707 Thanks so much! I really enjoy helping racers. I wish I had more time in the day to get more videos out and more shop time, especially with my dad. Hope you and yours have a great Christmas and New Year! Stay Safe!!
Are you SURE you still need that 75lb spread on left? Sounds like that 1 full turn changed the whole equation... maybe you should just leave that all alone but move the right rear forward or back a little on the 4 link to rear steer left or right more and leave the weight more equal like you got it! Great vid btw.
Sean Texsean thanks so much for your comments! You have a very valid point and I now that I have made this ARB change, I may not need that and the 75 lb spread. The car was going left, but that was before the ARB change and with a 75 lb spread at ride height. I will be checking the 4 corner weights with me in at ride height just to see where the corner weights are now. I may actually take the 75 lb spread down a good bit. I will be doing this again and I will post that video on how we land before next testing. This is a great comment and I appreciate you posting it!! Go fast, go straight! Be Safe!!
I promise you he is on to something u might be surprised when he gets the car back out to the track would like to see some videos of you doing the job also would be interesting to watch.
Camaro Drag Racing Second Generation thanks so much for your comments and support! I definitely think I am moving in the right direction with the 48 Ford. The track testing will be the real judge for sure. I cannot wait to get the 48 back out and do some testing. I will capture all the video and post back with transparency so we can all keep learning. Stay tuned. Go fast, go straight! Be Safe!!
1 when you take your rear weight the front was lower by the height of the balance.
2 when you tune your ground weight you need to be in it for the transition from be on the ground to wheelie.
3 it a close look what the car can do wheelie but a 1/4 inch left or right with the jack is gone to change the rear weight.
matthieu goyette thanks so much for your comments! Your points are valid! I will be repeating these tests again for sure. In this testing, we keep the jack on the same spot, but I do believe the data was interesting when you consider how we were unloading the left rear and planting the right rear at the track. Of course, no substitution for track testing these changes. One thing I cannot replicate is the twisting torque of the motor on left front and I cannot replicate the rear end twisting on the hit. Hopefully the changes in this controlled test makes sense, especially how fast weights shift with small wheelie bar staggers. Thanks for taking the time to comment and I value your feedback! Go fast, go straight! Be Safe!!
interesting for sure,
John Kries thanks so much for your comments! Go fast, go straight! Be Safe!!
I am happy I found the channel from Reddit great video are you trying to make money from RUclips if so watch Gary vaynerchuk and make 2 videos one like this one quick the idea you want to get out quick I love this I always wanted to study physics so I could get my race car going faster keep doing this much love
Frank Katsenis thanks so much for your comments! Not so much about making money, more about helping drag racers have more knowledge about their suspensions. Go fast, go straight! Be Safe!!
Go fund me for a floor jack lol