402 ls2 Solid Roller Dyno Results
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Joined: Feb 2023
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I wonder if a cathedral would have been better on this. Your new combo is making power, but you changed so much-more compression/solid roller/etc, it's hard to pin point what is working vs what may have been better. I think your old combo was pretty good for what it was. I think it would have been interesting to see the solid roller on a set of a TEA TFS 225's with the ported MSD. I do think the LS3 port is better, but the results show about 99% of the time on the 4.000 bore stuff it's a fight to make it work all the way. Look at Johnny Stock's SBE LS3 build. 600whp, less cubes, less compression, less cam but had a manual trans/light flywheel. I'm just guessing, but I think if it was apples/apples on the two builds, I would guess there is 50whp or so difference in the drivetrain. Dynos are different too, so that's always a factor. What headers/exhaust are on yours? I keep seeing the bigger 2in headers w/3.5 collectors becoming the crossover point on the wow builds, especially on strokers.
Could be wrong though. Hard to say. What I did was utilized some formulas provided by Darin Morgan (externally, I did not work with him at all) and that's how I came up with the flow I needed and csa and some other things. This motor makes quite a bit of torque even with the biggish cam and rec heads with short runners.
Last edited by B4CMaro; Jan 2, 2024 at 06:37 PM.
Thread Starter
On The Tree
Joined: Feb 2023
Posts: 109
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This Hammer's, Speedtigger and Helicoil's 416 build are my favorite LS3 builds. Speedtiggers was the only one putting up 700fwhp with a 4.000 bore and his was solid roller/Dart heads/single plane. You gotta have a lot of lift (.700+) to make LS3 heads work the way they should and I think that is why Johnny's worked so well. Hammer's and B4C's here are the only time I have seen a Fast LS3 intake make power. I keep wanting to buy a small bore LS3 head and tweak it to make it perfection a 4.000 bore, but I keep running the numbers and a small bore LS7 Higgins 4.000 head makes more sense. I would love to try the Edelbrock small bore LS3 heads too, but would have to be at the right price point. For an otb box head, for the $$$ the TEA TFS 225 is real tough to beat. I think there is power left in the intake manifold on most cathedral apps, too. Those heads have so much air speed, I don't think you can feed them enough. I think that is why most stroker cathedral motors don't make all the power, not enough intake/cam to support the extra cubes.
Cathedrals would not achieve what I was looking for within my budget constraints because I needed a quality shorter runner manifold, but not too short. The ls3 fast can utilize a shorter medium runner, shorter than the msd but not bleed too much torque. I don't want to use a sniper, didn't want to cut the car up for a high ram and can't afford a custom sheet metal intake. I am using tsp 1-7/8 headers and 3" dumped duals. I personally don't think cathedrals would have been the move here.
Could be wrong though. Hard to say. What I did was utilized some formulas provided by Darin Morgan (externally, I did not work with him at all) and that's how I came up with the flow I needed and csa and some other things. This motor makes quite a bit of torque even with the biggish cam and rec heads with short runners.
Could be wrong though. Hard to say. What I did was utilized some formulas provided by Darin Morgan (externally, I did not work with him at all) and that's how I came up with the flow I needed and csa and some other things. This motor makes quite a bit of torque even with the biggish cam and rec heads with short runners.
