View Full Version : Custom cal/head compatibility
The S is Silent
04-24-2006, 10:21 PM
How is a cal different between a 287 head and a 782 head? What would the difference be if I ran a cal designed for the 782 head on a highly ported G-head?
turbovanmanČ
04-25-2006, 09:24 PM
The g-head needs more spark advance due to the lower comp ratio. It could run a bit lean but you can always watch your guages and turn up the fuel presure if needed. I would give it a few more degrees base timing and go play. If its quiet, give it some more until it pings or using a scanner, see knock.
cordes
04-25-2006, 09:26 PM
You would probably want to adjust the pumpeff table too since the head will be ported.
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