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Originally Posted by milkeyisback
oh yea i totally agree with you on that, im not looking to try and make it faster that a stock TT im just trying to make it faster than a stock NA. I dont have enough money for a engine swap right now and i dont know if i ever will, so i was just thinkin this might be a fun way to boost some HP for low amounts of money. Does anyone know how much boost the engine internals, like piston rings and stuff can handle? i know my eclipse could have taken like 12psi or something but i would imagine this engine is much stronger than a crapy old 420a.
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Typical average boost pressure most NA engines can take with no internal mods is 6 to 8 psi. I don't think the 420A can take 12 psi, I know a lotta guys in the DSM business and the general consensus is that the 420A is made out of glass...... Like I said, 6-8 psi is right about where you want to be and not compromise reliability. Pretty sure you'll still need an upgraded ECU and a few other things.