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There are a couple of things to point out about Cody's 312 hp dyno run.
1. It's on a mustang dyno which is typically very low compared to the dynojet number most people quote. His 312 mustang dyno hp is more like 335+ dynojet. So you are looking at well over 380 crank hp.
2. His engine was ailing when he did that run. Something about valves being messed up due to a nasty over-rev. Can't say how much hp that was sapping, but needless to say, the numbers could only go up with a healthy engine.
3. This run was with his original manifold design. He has since switched to his GT1 design, which gives something like 22-23 whp per psi. That is rediculous. Assuming the same setup but with the GT1 manifold, the numbers most likely have increased 15-20 hp.
With the new GT1 setup (and a shitty turbo, nonetheless) one user managed to achieve over 23 whp per psi. Moderately boosting at 7 psi would give you about 350-360 whp. CRAZY
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