Who here is making power above 7500 RPM with an H22? I want to see dyno plots if you have them. I have heard all kinds of claims that this H22 makes power to 9K and so on, but I have not seen very many make power beyond 7500RPM. IF you are one of the people making gains above 7500 list some specs as well as you dyno plots please.

 

You saw my dyno right? I was peaking at 7500...I haven't tuned the cam gears yet...

But I think the main problem is the breathing...we just can't flow enough to make power up there, and it's still a BIG stroke...

 

maybe its too much stroke, too much inertia fighting the circular motion.

 

granted it's not an H22, but I've seen plots of an NA Del Sol VTEC (SCCA champion one) with the stock B16 IM make power up to about 7200 before it dropped off, then they switched to the JUN, STR, Venom, and I think they also used a Skunk2.. I'll have to re-read, but all of those produced less power than the stock one up to about 6900 or so, and then started to show their stuff. The engine redlined around 7800-8000 or something of that nature, but the aftermarket IM's were just starting to make power, and even at 8000 they were higher than the stock at even it's peak power output

 

I have to get my dyno scanned, even though it is not the best, it shows MPH instead of RPM, and it was done in 3rd gear. However, if someone can get me the RPM values for the speed in 3rd gear, this could probably help.

I had a peak hp of 195.2, and this was at 85 mph on my graph. Between 80 and 92 mph on my dyno graph, it made more than 190 in that entire range, only dropping off very slightly until redline, which is supposedly at 8100rpm.