Great video man, the LS is going to absolutely scream, I’ve seen very few put together with a cam that big, intake manifold is going to be important, my 370 ls with 1.89 intake valve heads that I ported during covid, “I know those can be way better” but it still peaks around 6600 and I’m shifting at 7, with fast 92mm intake and 231/243 duration cam, I kinda built that engine combo around the 1 5/8 headers, “only headers I could get for my swap at the time” traps 123 mph at 3200 lbs
I agree with Eric about bigger valve sizes. Back in 1998 we had a set of 23° 220cc runner 64cc chamber Sbc heads that we had ported bigger than 220cc and so on and it had 2.15 int and 1.6 exh shaft rockers port match 4500 intake and they made hella good power back then. We sold them back in 03 and the heads are still on a 400 sbc 98mm turbo today and making 1350 rwhp 12 lb boost on e85. As for the LS, im not a fan and they can make the power a sbc can and be reliable. And if we were to put 13 degree heads on the LS and SBC with same everything the sbc will eat, in my book. I mean Grub Worm is a stock block gen 2 steel block record holder 6.60 1/4 mile and he's getting 3 seasons out of a block. Keep up the great work Eric.
Hi Eric and thank you for the video and the great great explanations on the topic of flow!! It's great to see the history and developments of The Weingartner Racing! I wonder comparing the DIY flow bench to the manufactured ones you own, how accurate was the DIY bench?
That pipemax is some nice software!! The older software would be a great tool for average jot rodders. You and friends could bench race ideas into an engine combination, and then put in numbers and see where it’s at. Rather than build and engine and guess or hope it makes power. The newer version did have a place to look at adding boost. But either way you could plan a combination before you spend a dime.
Hey man, loved this video! You're one of the few guys that I try to always watch all your stuff (although I work too much to make that happen) For anybody sipping the Haterade, I remember watching results come in from the EMC competitions you were in - for a young guy who was working on his own, up against guys from really well-funded shops, who had decades of experience, you held your own pretty damn well For any of the trolls out there, go out and take on some names like Bischoff, Kaase, etc, and see how you stack up against them - Go ahead, post numbers. Same Dyno. Don't worry trolls, the internet will be there to give you feedback, lol BTW, I have an older version of pipemax, too; it's made me a couple of sets a headers that seem to work pretty well. Suspect Larry Meaux might know what he's doing... Super, super value for the dollar spent Highly recommended for any home gamer like me
Would "Isky tool" work used them a lot leaving off the head gasket and you can use a smaller cutter as it moves the cut away from the valve when assembled
@WeingartnerRacing I would like to participate in your head porting class. I need to learn how to analyze ports with flow bench and how to use pitot tube to do things like shape floor wings.
I suppose CC's are more relivant, when your looking at lets say a SBC-AFR head 23*. 190-200-210-220-227-235-245....same head, different port size.valve size..
Great information Eric, thank you for sharing! One question I have regarding polishing. I know the intakes should be left rough to prevent fuel dropout, but never understood why you wouldn't polish the combustion chambers and exhaust ports? I ask because because almost every Harley Davidson head porter does and have shown they get more power. Do you have any idea why it would work on V-Twins and not V-8s?
I think Harley guys are monkey see monkey do on that. There is no power difference I have seen from 80grit to polished. I have actually seen more power roughing up the intake part of the chamber. The benefit maybe reduced tendency to detonate.
Good video, just started & enjoying it. I hope you cover the short turn & it's anglularity. Do you angle the ST to match the valve angle? Do you lower one side of the ST on the side furthers away from bore center or lower the ST side closest to bore center or leave it equally? A vane in the center of the short turn is for what exactly? To help air navigate the guide & valve stem? Do you only use it on raised runner heads? Is my opinion true on the short side radius: for more flow @high lifts/high RPM you lay the short side back, but will lose low lift flow, but rpm should carry more & your gains will be at higher rpm in general. If the short side is not played back, the low lift #'a are better, but high lift/rpm suffers. Since I don't have multiples of the same head yet, I can't say yet from experience. I hope to learn more in the coming years. Thank you Terry
Nice video man 45 minutes of learning I learned more from Thai video then I have did from most school class or at work thank you Eric. I was about to ask about throttle response or off the corner response for circle track but you already answered my question you make the throat smaller to gain more low end so that's cool Eric. And I got good news for year there is a smaller rumer not this year but next year in my class they are going aluminum heads because all the iron heads are gone it's not confirmed but it's a rumor so I couldn't tell you much more than that now how would they would do the rule because it's called wingless spec sprint I don't know. I was told years ago they were way more restrictive on rules than what we got now. And now all we get is 367 cubic inch, 2 barrel, and iron 23 to 21 degree heads that's about it. So my class is not really spec anymore other than a 2 barrel because wingless sprint cars are really dangerous especially on big track so they try to keep cost low and speed slower which they are crazy without a injection system. Also my race season starts March 23rd in the hunt series there is more before that but I know it probably won't make it
Awesome video Eric! Waiting on the scheduling, but my 582 (with your BB3 Xtra and BM2017) should be hitting the dyno soon. We did our first start up a week or so ago. I actually just found that Wallace Racing Calculators has a header size calculator. I’ll soon be having custom headers built, so I’m curious. According to that calculator, I need 32.06” long primaries, 2.31” primary diameter and 4.06” collectors.
You mentioned some large port heads on a 350. 245 on 350 cid. Theoretically you could run a large port head in boosted application and it should function very well. And shaft rockers won’t limit rpm, with boost you don’t need massive lift. But it sure would be nice to see a high rpm, large port NA engine and then add boost. Probably be a dog NA and then a mad dog under boost. Hmmm. Ideas.
I use Engine Analyzer Pro. It gets a build into a good ball park. On your simulation, did you user define spark advance? I find the more specific and accurate your input details are, the more accurate the sim results. Great video.
Seance I don’t know crap and trying to know more this was great! But if I was an armchair professional you don’t know crap and you need more cam, and have to use exhaust pipe and I would say 3 inch. lol ! Thank you for trying to help us do better. Good video I think.
I think you did a very good job explaining the relationship between size, length and velocity and advantage of intake valve size. Kaasse has said to put the biggest intake in it you can and the exhaust will take care of itself. Good video all around.
If you had a class would you give up your secrets?anyways I also like porting and flowing heads mostly cast poncho ,did a experimental vortech 906 and found the str to be almost perfect as cast the bowl work added cfm,prp added some for a total of 20 cfm @ .500.Then decided to straighten the cylinder side curved area I removed alot of material and it added no flow.I never real cared about mcs as long as the removal of material stayed somewhat the same throughout the as cast .The str I believe becomes the true choke point after prp ,throat and bowl are opened up.I regress.
The observation I've made on the LS is that... as the valves are stood up, they're increasing piston to valve clearance rather than making the chamber more compact. For my engine, I kinda wish someone would've done exactly what you mentioned (small displacement LS... a 40cc chamber would probably be about perfect)
Great content thxs for all the hard work & sharing it !!!
Great video man, the LS is going to absolutely scream, I’ve seen very few put together with a cam that big, intake manifold is going to be important, my 370 ls with 1.89 intake valve heads that I ported during covid, “I know those can be way better” but it still peaks around 6600 and I’m shifting at 7, with fast 92mm intake and 231/243 duration cam, I kinda built that engine combo around the 1 5/8 headers, “only headers I could get for my swap at the time” traps 123 mph at 3200 lbs
I quite enjoy watching your vids. 😀
I agree with Eric about bigger valve sizes. Back in 1998 we had a set of 23° 220cc runner 64cc chamber Sbc heads that we had ported bigger than 220cc and so on and it had 2.15 int and 1.6 exh shaft rockers port match 4500 intake and they made hella good power back then. We sold them back in 03 and the heads are still on a 400 sbc 98mm turbo today and making 1350 rwhp 12 lb boost on e85.
As for the LS, im not a fan and they can make the power a sbc can and be reliable. And if we were to put 13 degree heads on the LS and SBC with same everything the sbc will eat, in my book. I mean Grub Worm is a stock block gen 2 steel block record holder 6.60 1/4 mile and he's getting 3 seasons out of a block. Keep up the great work Eric.
All good ; great Information
Always check valve clearance during mock up stage 😂
Hi Eric and thank you for the video and the great great explanations on the topic of flow!! It's great to see the history and developments of The Weingartner Racing! I wonder comparing the DIY flow bench to the manufactured ones you own, how accurate was the DIY bench?
They read within 2cfm
Thank you Eric
Love your long vids man
Excellent, thanks for sharing, all the best to you and your loved ones
Thanks Eric! I’m a numbers guy, so this video gave me a lot to think about, plus some great resources.
Glad it was helpful!
That pipemax is some nice software!!
The older software would be a great tool for average jot rodders. You and friends could bench race ideas into an engine combination, and then put in numbers and see where it’s at. Rather than build and engine and guess or hope it makes power.
The newer version did have a place to look at adding boost.
But either way you could plan a combination before you spend a dime.
Great info!!!
Thanks for sharing!!!!
Would love to hear about a class BTW....
That's what im looking for a porting class i call reher and Morrison all the time
Awsome content thanks for sharing all this info
You absolutely just blew my mind. I took runner cc as gospel almost man was I wrong.
Will be cool to see someone doing classes as Darin doesn’t do his anymore.
You're a good man Eric.
Hey man, loved this video!
You're one of the few guys that I try to always watch all your stuff (although I work too much to make that happen)
For anybody sipping the Haterade, I remember watching results come in from the EMC competitions you were in - for a young guy who was working on his own, up against guys from really well-funded shops, who had decades of experience, you held your own pretty damn well
For any of the trolls out there, go out and take on some names like Bischoff, Kaase, etc, and see how you stack up against them - Go ahead, post numbers. Same Dyno.
Don't worry trolls, the internet will be there to give you feedback, lol
BTW, I have an older version of pipemax, too; it's made me a couple of sets a headers that seem to work pretty well. Suspect Larry Meaux might know what he's doing... Super, super value for the dollar spent
Highly recommended for any home gamer like me
I would fly out from California for that class. My parents live in Oklahoma would be nice to visit
Thanks Eric, always a ton of great info!
You bet!
Thank you for your knowledge and video's USA 🇺🇸 USA 🇺🇸
This is what I’ve been waiting on.
Thanks for sharing.
No problem!
Really interesting video. Sound reasoning to my ears 👍
Glad to hear it!
Would "Isky tool" work used them a lot leaving off the head gasket and you can use a smaller cutter as it moves the cut away from the valve when assembled
@WeingartnerRacing I would like to participate in your head porting class. I need to learn how to analyze ports with flow bench and how to use pitot tube to do things like shape floor wings.
I suppose CC's are more relivant, when your looking at lets say a SBC-AFR head 23*. 190-200-210-220-227-235-245....same head, different port size.valve size..
Great video Eric
Great information Eric, thank you for sharing! One question I have regarding polishing. I know the intakes should be left rough to prevent fuel dropout, but never understood why you wouldn't polish the combustion chambers and exhaust ports? I ask because because almost every Harley Davidson head porter does and have shown they get more power. Do you have any idea why it would work on V-Twins and not V-8s?
I think Harley guys are monkey see monkey do on that. There is no power difference I have seen from 80grit to polished. I have actually seen more power roughing up the intake part of the chamber. The benefit maybe reduced tendency to detonate.
Freakin awesome video Eric!!!!!! Like always!! 😎👍👌
Thanks
I would be interested in a class .
Grate tech stuff cross sec. Average and formulas Live Formulas. 🤠
Thank you I really appreciate
You are welcome
Shouldn't the intake manifold be part of the conversation? Length and volume from valve head to the intake plenum?
Its calculations are shown in the video. But manifolds themselves would be there separate video.
can i use the software with millimeters number not in inches?
@@stooseeI don’t know.
im not sure if this is dumb or not but would valves shaped like ball bearings flow good? just wondering.
I'm thinking heavy and taking up port volume. I could be wrong, may be other reasons too
Awesome
In before the audio renders
Good video, just started & enjoying it. I hope you cover the short turn & it's anglularity. Do you angle the ST to match the valve angle? Do you lower one side of the ST on the side furthers away from bore center or lower the ST side closest to bore center or leave it equally? A vane in the center of the short turn is for what exactly? To help air navigate the guide & valve stem? Do you only use it on raised runner heads? Is my opinion true on the short side radius: for more flow @high lifts/high RPM you lay the short side back, but will lose low lift flow, but rpm should carry more & your gains will be at higher rpm in general. If the short side is not played back, the low lift #'a are better, but high lift/rpm suffers. Since I don't have multiples of the same head yet, I can't say yet from experience. I hope to learn more in the coming years.
Thank you
Terry
Thanks for taking time to provide all that! I'd be interested in some online classes
I will not do online. RUclips is about it.
45 minute videos??
Great video! Thanks Eric
You bet!
Nice video man 45 minutes of learning I learned more from Thai video then I have did from most school class or at work thank you Eric. I was about to ask about throttle response or off the corner response for circle track but you already answered my question you make the throat smaller to gain more low end so that's cool Eric. And I got good news for year there is a smaller rumer not this year but next year in my class they are going aluminum heads because all the iron heads are gone it's not confirmed but it's a rumor so I couldn't tell you much more than that now how would they would do the rule because it's called wingless spec sprint I don't know. I was told years ago they were way more restrictive on rules than what we got now. And now all we get is 367 cubic inch, 2 barrel, and iron 23 to 21 degree heads that's about it. So my class is not really spec anymore other than a 2 barrel because wingless sprint cars are really dangerous especially on big track so they try to keep cost low and speed slower which they are crazy without a injection system. Also my race season starts March 23rd in the hunt series there is more before that but I know it probably won't make it
Which programs do you use to spec camshafts!?!?
Myself
does the flotek 290 with the 2.300 valve fall into that or is that an exception?
Awesome video Eric! Waiting on the scheduling, but my 582 (with your BB3 Xtra and BM2017) should be hitting the dyno soon. We did our first start up a week or so ago. I actually just found that Wallace Racing Calculators has a header size calculator. I’ll soon be having custom headers built, so I’m curious. According to that calculator, I need 32.06” long primaries, 2.31” primary diameter and 4.06” collectors.
You mentioned some large port heads on a 350. 245 on 350 cid.
Theoretically you could run a large port head in boosted application and it should function very well.
And shaft rockers won’t limit rpm, with boost you don’t need massive lift. But it sure would be nice to see a high rpm, large port NA engine and then add boost. Probably be a dog NA and then a mad dog under boost. Hmmm. Ideas.
I use Engine Analyzer Pro.
It gets a build into a good ball park.
On your simulation, did you user define spark advance?
I find the more specific and accurate your input details are, the more accurate the sim results.
Great video.
Seance I don’t know crap and trying to know more this was great! But if I was an armchair professional you don’t know crap and you need more cam, and have to use exhaust pipe and I would say 3 inch. lol ! Thank you for trying to help us do better. Good video I think.
Really good information! Thanks! I like the longer videos, but I like learning about stuff too though, lol.
I think you did a very good job explaining the relationship between size, length and velocity and advantage of intake valve size. Kaasse has said to put the biggest intake in it you can and the exhaust will take care of itself. Good video all around.
Thanks for the video, always learning something from them!!
Very interesting video. Thanks for sharing.
Stop worrying, you can't please everyone..keep on grinding
The porting class would be cool but not for $1000. You are a talented head porter
Thank you very much for another great video
Eric, Great info. Thanks again
thanks eric
Thanks man.good video
If you had a class would you give up your secrets?anyways I also like porting and flowing heads mostly cast poncho ,did a experimental vortech 906 and found the str to be almost perfect as cast the bowl work added cfm,prp added some for a total of 20 cfm @ .500.Then decided to straighten the cylinder side curved area I removed alot of material and it added no flow.I never real cared about mcs as long as the removal of material stayed somewhat the same throughout the as cast .The str I believe becomes the true choke point after prp ,throat and bowl are opened up.I regress.
I would tell a lot but in two days you can’t learn what took years.
The ls with the shallower valve probably has the better combustion chamber too?
There chambers are large for the valve angle they have. A 15degree sbc head has a 53cc chamber ls3 have 70cc
The observation I've made on the LS is that... as the valves are stood up, they're increasing piston to valve clearance rather than making the chamber more compact. For my engine, I kinda wish someone would've done exactly what you mentioned (small displacement LS... a 40cc chamber would probably be about perfect)
Well done.
Thanks
I would sign up for a 2 day porting class
If was somewhat advanced class for people with there own flow benches and just wanna get into the math more
Darrin Morgan’s class is good for math.