if you have the time and the money you can safely boost a 10.5:1 comp motor. People do it on Hondas all the time. However, if you plan on spraying and boosting, I can gurantee that compression is too high. The two main things you need to worry about are air charge temperature and proper fuel delivery. How much boost? How big of a shot of nitrous? 11:1 is really getting up there, you'd already be pushing it with 10.5:1. With 10.5:1 you'd only really be able to boost 5 or 6 lbs without some SERIOUS tuning.Originally Posted by 4G64T
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