Quote:
Originally Posted by synolimit
Me too. I want my tuner to copy it but if he isn't giving out porting secrets he sure as **** isn't going to give tuning!!
I did talk to my tuner the other day and I thought this was interesting...he tuned a older 370 and played with vvel and couldn't get anything after a hour he said. But then last week he did a 13 and got like 10hp. He asked me if I knew anything that changed in the ecu or something that attributed to it but I've never heard anything. Only thing I've seen is what Megan has showed with the nismo vs non and such.
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It took a while for my buddy who tuned my car to make significant gains -- we had a few logical hypotheses about where and what to change, but even then, there is still trial and error.
I think the TSM absolute values are a bit high (CF's of 1.03 - 1.05), but the overall proportionate change is awfully encouraging.
I can only imagine larger primaries, lots of porting, and maybe some pretty oval velocity stacks on the intakes are involved plus lots and lots of playing with VVEL.
In short: massage everything so it improves flow and then step-by-step experiment with VVEL to optimize valve timing.
The limits of space under the hood can be worked around to some extent -- on my old Celica we had to chop out a bit of the hood frame to make a little extra room for an intercooler core -- but we still aren't really clear on what exactly was done on the test car, at least last I checked.