Because the heads were bought used, we really didn't know how they were going to flow. Apparently the work that Brzezinski did on them for the previous owner made the heads much more efficient than we planned on. My friend that helped with the cam selection was disappointed that we undershot the peak RPM, the engine made peak HP at 5400 RPM and peak TQ at 4100 RPM. I'm alright with this though as this helped the torque curve down lower which I was more concerned about than the peak hp number. It still pulls on through 6000 RPM only dropping about 20 hp from peak.
To me, this is why we put it on the dyno. Not to see what the peak number was but to see the curves and where the peaks were (and mostly just to break it in and make sure there were no issues). Every dyno is different and especially when corrected for conditions...who knows what the real number is. On a different dyno on a different day, I'm sure the numbers could be 30 or 40 off of this in either direction. For this dyno...and the conditions present at the time, this is what it made.
524 ft lb at 4100 RPM and 467 HP at 5400 RPM.
That was the last pull with the air cleaner and spacer on. It was about 5 hp higher throughout than the 2nd pull (first with air cleaner on).
Here is the first pull without the air cleaner on.
As you can see it made 50 ft lbs and 22 HP more at peak with the air cleaner and spacer installed!!
I am VERY happy with the results...ecstatic even. I can't wait to see what the butt dyno feels like. I'm slightly concerned that I may now have a more serious traction issue.
