39594, RE: Is the 420a safe with stock internals? Posted by XtremeRS, Dec-31-69 06:00 PM
>You are suggesting some higher psi's than what i have been >reading.. i mean.. some have said do not go past 7 psi if you >dont want to blow.. but you are saying you can push it more on >stock internals if the fuel is there and not worry. now.. my >kit will be here soon, and I've already bought a vortech sfmu >and a walbro 255 intank. since I've bought those components, >could I reliably run more boost (how much)?
It seems to me it has been proven from many, many people with turbos on stock engines, that the motor will hold 8 psi without any problems, asssuming good tuning without any detonation. I ran 8-9 psi for a long time without any probs. I beat on that motor too. If you are really worried about the stock motor, then dont push 8 psi to be safe. You must tune it good, and take care of it though.
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