Quote:
Originally Posted by Formulajones
I can attest to that with my own testing I did that I mentioned earlier on my RAIII. While not as powerful as a IV I still found substantial gains over the repo factory Gardner exhaust where the car was stuck at 14.10's and teens and 99 mph. An h-pipe flowmaster transverse kit picked it up to 13.70's at 102 with no other changes. I later changed to a pypes transverse setup with x-pipe and gained another couple tenths and similar mph.
I've since tuned and tweaked some more to run a best 13.10 @ 106 uncorrected in a bone stock RAIII.
I contribute a big part of getting there in just the exhaust system alone.
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Interesting, my 72 Lemans with 400, #16 heads, 068 cam, logs, crush bent quiet system and 3.55s is stuck at 14.6 at 95.
Looking to go to a mandrel pypes system.
What would the ram air manifolds bring for improvement? Worth the effort if I can find them?