Low-5.0 said:
This thread got me thinking...I wonder how a 347 built to similar specs as the LS1(346ci) would compare to it? Throw on some 205cc heads at around 10-10.5:1 compression, similar cam specs, a high flowing intake, etc. I know it wouldn't really be fair because the Ford engine would be all aftermarket, but on paper it should have very similar specs to the LS1.
right from afr's website--alot of the ford numbers got cutoff, note the cam differences between the two(we all know how ls1's react to cams). the ford is also running on 114 octane due to 13:1 compression. imo, not even close.
574 HP
347ci
205cc AFR
n/a
990 CFM Demon
36° Timing
274/282° .625/.630 Hydrolic Roller
110 Lope Center
1 3/4
114 Octane
Funnel Web
Engine dyno tested by Ford Performance Solutions
LS1 Dyno Test
Baseline Engine: Stock LS-1 Longblock, LS-6 Intake Manifold, 1 3/4"
Headers-Long Tube Style, 3"
Flowmaster Mufflers. *
VS
All Same As Above WithThe Exception Of: AFR LS-1 "205" CNC Heads, Fast
Intake Manifold, Cam-224/228 @.050 .581 Lift, 78mm Ported Throttle Body. *
--------------------------------------------------------------------------------
AFR LS-1 "205" CNC Heads 530HP@6500 and 475lbft@4900
VS
Stock Heads 428HP@5700 and 432lbft@4700