Quote: A big Wedge head is a bit different than a big Hemi head! Everyone know's 426 Hemi's don't make any low speed power...it's all up top.
yes and no...you get some inherent tumble and swirl induced by the wedge head's valves proximity to the cylinder wall, as well as increased shrouding that you won't get with a hemi or pentroof (closer to what the genIII is)....but overall intke tract length, port volume, cross section, and valve timing/action I bet have a bigger influence in low speed power than valve configuration. take a similar displacement hemi and wedge, with similar port volume/cross section built similarly, I bet their power curves will track pretty closely....
here's the dyno results of Dulcich's "mild manner mauler" which is a .030 over, stock stroke 440 with 295CC indy EZ heads, comp XE275HL with 1.7 rockers, and starts out with an indy dual plane intake....
with the indy 2 plane intake, those huge heads are making peak torque at 3500 RPM, while still making 96% of peak torque from 3100 RPM to 5500 RPM, where he got into instability issues trying to run a hydraulic lifter with an XEHL cam AND 1.7 rockers...runs 3 and 4 switch to a single plane intake, and that one change moved the torque peak up to 5000 RPM, but we only see about 85% of peak torque at 3100 RPM....
here's the same motor, but a switch to a small solid roller (242@.050)
interesting how the peak torque with the dual plane intake jumped up to basically a plateau from 4500-5500 RPM, but it's still making 90% of peak torque from 3000 RPM to 6500, and with a switch to a single plane, peak torque jumped up to ~5000 RPM, but it's only making 81% at 3000 RPM...
Now go find a Hemi that somebody did those things to and you'll see what I mean.
