Quote:
Originally Posted by 95 imp
So, if I run my engine 100* cooler, I pick up 10% hp?
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What I said was, for every 10 degrees you can gain or lose 1%. Example, there can be a 9 horsepower difference between a 450 horse engine running at 180 degrees versus 200 degrees and maybe more if running at 170 degrees. Two things coming into play regarding todays tuning tables and a engine pulling in cool dense air. The intake manifold, throttle body, cylinder heads will be cooler and not warming the air, a look at a typical LT1 timing table shows timing already being pulled at 194 degrees of water temp, you will also see timing being pulled when intake air temp gets hotter and hotter. Trick is to get the engine to pull in as much ambient air as possible ( not heated engine compartment air) and run lower water temps with in reason on a street car. Also run the highest octane pump gas to negate spark retard. High temps promote spark knock, knock sensors retard spark. Keep the timing tables maxed out and ingest as much cool air as possible not only creates horsepower but also stops horsepower loss