roughly how much boost will stock internals take, for (safe) DD? planning on b16 head swap at later date.
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you will be lucky to get 5 psi out of that block, for more than 10 passes like george said the b20 sleeves suck
if you replace the rods, rod bolts, and pistons and its tuned well they can take some boost. there are plenty of people making 300hp on stock sleeve b20s. i know of one that makes over 400whp with stock sleeves, and for 6 months and counting.
Boo.no b20 block is a low comp. block atleast 10lbs my friend has a stock b16 on 10 lbs and is hold up real good
Boo.yeah it might hold up 10 if its tuned really well. but dont be revving it to 8000+ rpms.
Boo.you will be lucky to get 5 psi out of that block, for more than 10 passes like george said the b20 sleeves suck
How many times must I say this? PSI is completely irrelevant UNTIL you select a turbo size. I wish everyone on this board would understand that. It'd solve a lot of problems more quickly.
To the OP: Stock B20 internals would make me nervous above 200whp especially if it is a DD. Build it right, or don't do it at all.
Based on the research I have done, the stock sleeves on a B20 will only hold about 4-6psi from a T4 60 trim turbo with a modest tune. Granted, these numbers can be used loosely as you see fit, but if you plan to make any kind of power out of that motor, at the very least you need to resleeve it.