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Re: 3065 or 3575
My 67 is very laggy. It spools around 5400-5600 on the dyno, and thats with my 5" 3.5" exhaust on it. Cher's FPT67 was very very laggy, it was lucky to spool by 6000. PTE's 3767 and FPs 3575 use a GT37 exhaust wheel, which spools a tad bit better than the exhaust wheel me and Cher had. Just remember, big exhaust wheels and bit exhaust sides make power, but add crap loads of lag. The compressor wheel is the lightest component of the turbo, so going to a bigger wheel isn't usually the main reason why a bigger turbo is laggier, it is because in order for it to make the power that the compressor wheel is capable of producing, you need a big exhaust side to get it out. The FP3065 is a good choice though, if you want spoolup and throttle response, since it is dual ball-bearing, while the FP3575 is not. You could also possibly get them to make an FP3565, while is essentially a GT35R with their turbine housing on it.
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