So I'm building a motor or two and am trying to decide on apex seals. Hear alot of the big name builders hawk carbon seals. Now from everything I've read these are really only a benefit at high RPM and actually seal worse than stock at low RPM. Seems like 8500 RPM is the magic number where they are better or start to get better. Don't know about everyone else but until I have real dyno info to back up my butt I'm saying I'm out of the powerband by 8000 or so. Sooooo....

What's everyone's take on stock steel v. carbon? Don't even mention ceramic. Since the money is the same either way I just want the best seal for an ITS motor. Will the carbon seals allow the motor to make power past where it's falling off now or is the limit I'm feeling more of a function of intake, exhaust, stock port combo? Will any gains in the upper RPM range offset losses between 6500-7500? Thanks!

Chris

------------------
Chris Ludwig
08 ITS RX7 CenDiv