Raf down 2 grams a second after heads?
05-31-2008, 09:24 AM
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Raf down 2 grams a second after heads? ok i have a Tsp 231/237 cam and just installed a set of afr 205's. Before the heads I was cam only with the 231/237. The car idled perfectly with my slightly drilled throttle body and 9 grams a second on my raf table at operating temps when it was cam only. After installing the afr 205;s I had to adjust my raf down by about 2 grams per second across the board. with no other changes except for the slightly milled heads. does this sound like i have a vacuum leak or something, or are the heads just that much more efficient. The car runs really good, the only thing that got me wondering was im getting alot more bucking than i was when it was cam only. whats everyone think?
