Quote:
Originally Posted by sw20kosh
The timing will come down drastically on pump gas. For example, at 7k rpm I am able to run a max of 25.5 deg of ignition timing at e80 at 15 psi. That timing would be 10-12 deg on pump 91 oct and power would drop to about 280-290 whp.
I would never track on 91 oct while boosting on any pulley on this or stock CR. The tune would just have to be way too conservative and would need to get even more conservative as inlet temps increased. At the very least, would need to blend in some 100 oct to get to ~94-95 oct.
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I feel like this car, more than any other NA or boosted car I have been in, will automatically change timing. It is either doing that or the effects from having high compression are compounded. Cold days seem like the car is more powerful, and not just slightly, but really noticeabe. Altitude really robs power, not just slightly.