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1998 Acura GS-R, bought w/ no motor-(stolen, recovered w/o engine, obviously) well i scored a 1997 1.8L LS motor, i am going to turbo, looking to push 325-400whp. DO I need to hone the pistons of this block to handle the stress of the boost? quoted at $1,200. I want to run 15-30 psi boost. Part #2 question: How much is a front wheel drive LSD (limited slip diff)? Can you buy a used one? This is costing ALOT more than originally expected, I mean like $5-$8 grand b-4 i go smoke wrx's(sti) and evo's, mustang's, and camaros!!!!!
 

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You aren't going to be smoking any STIs with that...and how does "honing the pistons" increase stress resistance? Someone's feeding you a line of crap.
 

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You don't hone pistons, you hone the cylinder. You will need stronger connecting rods, stronger crank, a stronger drive shaft and differential, etc. To run 30 psi is just ridiculous and asking for trouble, or too much of a price tag if you do it right. Honestly, scrap the LS motor, get a GS-R bottom end (basically the bottom end of the block, crank etc) and mate it with SI heads. that way you get the torque of the GS-R and the horsepower of an SI, that LS peice of junk will get you no where, especally the horsepower you want.

I'd run 14 psi if I were you. I've seen major problems with people running over 20 psi.
 

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If you want to run boost up to 30 psi, you're going to have to do a lot to reinforce the engine. To get that kind of power at the wheels, you're probably going to have to do more than just slap a turbo on to a stock 1.8 LS motor. You'd probably want to add a chip, change the camshaft, lightweight pulleys, maybe completely new engine internals....
 
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