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Thread: SR20DET Bottom End Question

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Posts: 11-16 of 16
2009-10-19 23:34:06
there are things to look at to when it comes down to rebuilding the block, not just for power purposes but you can have it blue printed,balanced and rotated,have the rotation assembly lightened.

you can get higher compression pistons, not na high but turbo high compression and that can aid you in making power, so there are many things to think about when it comes down to weather or not you should invest in a block rebuild.

if you are doing the headi would do the block too, and build it up to support the mods you want to incorperate in the head and turbo kit, but thats just me
2009-10-19 23:47:19
Originally Posted by LANCESR20
Most red top det's that are stock usually are not in the best of condition internally. They are usually high mileage and worn down. For 300-350 whp stock det pistons and rods will hold up fine on a good tune, but a stock rebuild will help it last. I think though if you ever plan on going higher than lets say......420whp then maybe you should consider throwing in some forged pistons and rods.

This man speaks the truth. It is very hard nowadays to find a clean RWD redtop motor.
2009-10-20 01:14:13
I paid the money to get a low millage motor, I'm not so much worried about that... but good point.

Pulling the engine at a later time to re-do the bottom end isn't that much of a chore in this project... what I was hoping to hear is that a reliable 350ish or even closer to 400HP is possible with a good top end/turbo setup. And by the sounds of it I should be alright.

what about as far as the stock head goes... is a JDM upgrade or machining madatory? or will the stock one flow well enough with that horsepower.... and probably around 12-13 psi, so long as I have the intake/cams to back it up?
2009-10-20 01:35:28
slap a big turbo on with good exhaust mani and tune and boost the crap out of it.

I'm curious as to how you know you got a low milage jdm motor? I could say my motor is low mileage and even show you a gauge cluster would you believe me?
2009-10-20 01:55:02
Well without a doubt there's miles on the engine, but for one I know the guys well. I've also checked all the oil clearances, compression tests, pulled a bearing out to take a look... she seems to be in good condition. But that's a chance you take on any engine!

The thought of re-doing the bottom end and going through the break in process just seems like a step I don't want to take for something that will see the road a few weeks out of the year. All I needed was reassurance that a stock rotating assembly in good condition should handle upwards of 350-400HP.

question still stands about the stock head, if anyone has any advice.

Cheers! thanks again for the input fellas.
2009-10-20 01:57:08
i know a lot of people on the fwd side dont port the head just cams(springs/retainers some times) and make what you want to make.
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