need more boost
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yeah a stock, unmodified auto turbo will NOT boost about 20psi much at all. The most I ever got was 23psi without a J-hook. J-hook got me up to almost 30. You might want to start thinking into keeping that tranny COOL and fueling the VP44. If you havent swapped in better parts for those, start thinking about it. Not sure how many miles you have on your beast but you need to be carefull if you havent already taken steps to protect those two areas. I love my truck, but the stock tranny and lift pump SUCK!
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