Originally posted by warmonger:
Another factor that you aren't considering, I am running essentially the same compression as a 3L motor because I intended originally to supercharge the motor, whereas DavidZ is running 11:1. That itself is about a 10 HP gain at least.
DavidZ used 3L valves and MSDS headers.
I made 217 wHP without headers and without the higher compression
warmonger
David Z had a set of awesome cams to help him get his 240FWHP - untuned (though he said tuned it made another ~10HP IIRC)
He also used a (98) SH SVT UIM with 3L LIM, ported heads & compression a bit over 11.5:1
That's 23-33HP difference. (Cams & compression alone are likely 20-25HP) He probably would have found very nice gains with a larger UIM!
On another note - I also thought your CR was figured around 10.3-10.4:1
I'm in the same boat as you thinking that your manifold mods are a big reason why you are making such good HP...
...and with some headers soon...
