Turbo 6.2
#1
Turbo 6.2
Just finished tuning a stock 6.2 with 72mm .96a/r and the truck would not take timing well at all. The turbo spooled full boost 8lbs at just less than 2000rpm's. I've been getting opinions on the problem, and have heard backpressure may be too high, or the turbo is to small. I did want something that would come on instantly, which it does, but I expected to be able to run more boost 10-12lbs and decent timing. My tuner doesnt want to push the boost any further because of IAT's and low timing. Anybody have experience with something similar, or can offer other suggestions to look at?
#2
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That turbo is way to small for 6.2. The back pressure is too high because of the small turbine wheel. Need a bigger turbo. A s475 83mm turbine should help a lot and still spool up really fast. Less back pressure will allow you to add in some timing too.
#3
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Yea your gonna need a decent size turbo.. It will feed it at 12# but its not gonna make the power as say a S475 will on 12#..
Lower the boost or get a bigger turbo.. not much else way around it.
Lower the boost or get a bigger turbo.. not much else way around it.
#7