Quote:
Originally Posted by nismomo
Thanks, much appreciated. I see the PPE's continued to climb while FI plateau at 7k rpm. I see PPE's file says Nismo CAI, was the FI dyno run with a CAI as well? I've read that CAI helps at the very top of the band. If the FI run did not have a CAI, could this be the reason why it plateaus compared to the PPE?
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The other car is equipped very similarly. Same exhaust, comparable intakes, etc.
The PPE's flattening out after 7300rpm is actually an intake manifold/throttle body restriction. (You can see the 'quenching' action this restriction has starting at ~6400rpm. A linear fall off of torque, that's what it looks like when you put a restrictor plate on an engine.)
I'll be addressing that eventually and then the top end will be even more dramatic.
Yeah the cost isn't worth it for a street car if you have to pay someone else to do it.