Ls2 408 stroker
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I think it's a great idea optimizing the build you have. We always get caught up on going bigger and better. With the right components and hands in the recipe, a 408 can scream pretty hardcore. Those Mamo heads seem like a nice setup for your new goals too. If it doesn't break the bank I'd go with the bigger exhaust valve. I know the valve cost goes up pretty quickly with increased size. I like rpm so I'd run the MSD but it really depends on your ultimate goals. Everything needs to match well. It's a good conversation to have with whoever specs your cam. I usually just have Mamo spec mine with Darth's help.
It's just way more cost effective way and I can get that 408 to the best that it can be for a street car.
I'm running the 4L65E transmission and these don't really like to be above 7000rpm so maybe it's best to stick to the FAST.
13hp more is stuff all and if that is fly wheel the gain is small while you take a hit off idle to 6500rpm.
I'm betting the FAST will be stronger under the curve too.
Do you guys think I should still use a low lash solid roller?
That way I won't need to change lifters either.
Starting new,I'd agree going cathedral on that size motor and an msd. I think a fast for stock stroke but the 408 I'd prefer msd.
I think I'd run the set up you have for now though to see where you are at , I also was looking at making all kinds of changes while my car was down.now that it's running, I'm glad I stayed the course . I think you will spend a lot of money on small gains honestly.
I think I'd run the set up you have for now though to see where you are at , I also was looking at making all kinds of changes while my car was down.now that it's running, I'm glad I stayed the course . I think you will spend a lot of money on small gains honestly.
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I will be running the setup I have now for a while but I need to make some final decisions with these cathedral heads.
Go the bigger exhaust valve or not.
Fast or MSD. Your point is valid also.
I am not expecting crazy differences in power but there will be a big difference in low and mid range torque and also throttle response.
You never know, it might make more power too.
I think they flow around 350CFM through a 237cc port.
Go the bigger exhaust valve or not.
Fast or MSD. Your point is valid also.
I am not expecting crazy differences in power but there will be a big difference in low and mid range torque and also throttle response.
You never know, it might make more power too.
I think they flow around 350CFM through a 237cc port.
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Tuskey here's your thread.. & Bortous, stay solid roller.
https://ls1tech.com/forums/dynamomet...is-dyno-s.html
https://ls1tech.com/forums/dynamomet...is-dyno-s.html
Last edited by Smokey B; Feb 4, 2020 at 05:45 AM.
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Didn't know....how about these
https://ls1tech.com/forums/dynamomet...559-508-a.html or this one..
https://ls1tech.com/forums/dynamomet...yno-graph.html
https://ls1tech.com/forums/dynamomet...-601-rwhp.html
https://ls1tech.com/forums/dynamomet...559-508-a.html or this one..
https://ls1tech.com/forums/dynamomet...yno-graph.html
https://ls1tech.com/forums/dynamomet...-601-rwhp.html
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Erik at HPR said CID Ford SC1 Canted valve head will be made to fit the LS...I asked about doing or trying this Yrs ago...Ford Canted valve heads are cheaper than LS Canted valve heads..
Heads will be called the LSC1
https://m.facebook.com/story.php?sto...75888512561941
Heads will be called the LSC1
https://m.facebook.com/story.php?sto...75888512561941
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In for results. As for the heads your choice but I still think some good small bore ls7 heads on your 408 will decimate all. Going to cathedrals even great ones won't be worth much over what you already have imo for what they are going to cost.
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As for power engine will definitely make around the same if not more.
But throttle response low and mid range torque will be explosive.
If Darths car made 500rwhp on an LS1 with 205cc heads surely my 408 with 237cc heads should make more.
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None of Tony's heads are cheap but they do work.
As for power engine will definitely make around the same if not more.
But throttle response low and mid range torque will be explosive.
If Darths car made 500rwhp on an LS1 with 205cc heads surely my 408 with 237cc heads should make more.
As for power engine will definitely make around the same if not more.
But throttle response low and mid range torque will be explosive.
If Darths car made 500rwhp on an LS1 with 205cc heads surely my 408 with 237cc heads should make more.
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This one I am not sure of yet.
My rev limit will be around 7000rpm.
From what I have read the solid might make about 10rwhp more.
But if I use those short travel hydraulic lifters I can have a maintenance free valvetrain and still make great power.
I an thinking that the solid roller might be more responsive and pull harder because of the more aggressive ramp rates.
My rev limit will be around 7000rpm.
From what I have read the solid might make about 10rwhp more.
But if I use those short travel hydraulic lifters I can have a maintenance free valvetrain and still make great power.
I an thinking that the solid roller might be more responsive and pull harder because of the more aggressive ramp rates.
Originally Posted by bortous
None of Tony's heads are cheap but they do work.
As for power engine will definitely make around the same if not more.
But throttle response low and mid range torque will be explosive.
If Darths car made 500rwhp on an LS1 with 205cc heads surely my 408 with 237cc heads should make more.
As for power engine will definitely make around the same if not more.
But throttle response low and mid range torque will be explosive.
If Darths car made 500rwhp on an LS1 with 205cc heads surely my 408 with 237cc heads should make more.
PatG made 508 on tonys afr205 heads in a 346 back in the day
I made 5xx on tonys 220 heads a couple years back now on my 346
It does not change Borts point, but wanted to make sure the record was correct on who did what with which heads.
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What kind of RPM did you turn with the hydraulic cam in the 346 before you went solid Darth?