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"everything depends on the tune" huh? So cast aluminum pistons live forever if the tune is good? How many 400 horsepower stock bottom end sr20's have you run?
Let me guess: ZERO.
Dont push an OEM sr20det bottom end past 300-350 if you want it to live for 50,000 miles. That is my conservative @$$, yes, but thats just me. I am conservative. and that is a matter of opinion. guess I need to add that $#!T to every one of my posts now huh.
The op is interested in HORSEPOWER. Not SR20's no KA's not LSx's not nuthin. WE are HORSEPOWER junkies, not SR20 Junkies. I dont care what the power plant is, if you hand me 500 horsepower thats 500 horsepower to the wheels its going to be fun to drive.
Why dig into an engine when you dont have to? why risk building anything, custom parts, machine work, nothing ever gets done right. The less you do, the simpler the setup, the less problems you will have, the less risks you will take. OEM 2j bottom end > built sr20 bottom end. any day of any week. thats experience AND common sense talking. oh, and opinion. opinion.
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