Quote:
Originally Posted by chris82
I think with single digit boost you'd be fine. There are a few people with the kit on the e90 forum and I haven't seen issues over there yet. Long term reliability would obviously be questionable.
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I agree. I've seen plenty of cars with FI that wasn't really intended for it. You look at the material the connecting rods are made out of on some of the earlier Z and Infinity engines, and I know a lot of people running FI for long periods of time on that platform. 6-7 psi is pretty safe.
It's all in the tune, being conservative with your A/F ratios and tables, and building in safety factors such as "knock" tables, etc.
Plus being FI doesn't mean you have to thrash the car all the time.