b18a internals for boost
s1267712
05-04-2003, 06:37 PM
Ok, I am swappin a b18a into my 91 civic this summer and it will be boosted next winter. I am gonna do a rebuild before dropping it in. The turbo somponents will be a mitsubishi 13b turbo (just for now, its free : ), mitsubishi 450 injectors, custom manifold, simple bleeder valve boost controller and a custom chipped ecu (tuned by yours truly : ). I am looking to run around 10psi, If I shotpeen the rods and pistons, maybe with some sweet coating on the piston skirts, would they hold up to it? maybe a block girdle too. Or would I defiantely need forged rods? anyone running shot peened rods? what can they handle. I think they would take it, just looking to see if anybody is running some and what they think. Thanks guys.
s1267712
05-04-2003, 06:46 PM
oh, yeah, how about blockguard/studding. Sleaving is nice, but too expensive, I think they say the block guards steel cooling from the top of the pistons and right at the top is no thte high stress spot too. What if you pressed it in deeper, like 1/2 inch below the deck? would that work good??? seems logical to me, but there must be a reason not too. Feel free to get REALLY technical, I am an engineering student and not just some schmuck who things it would be cool to boost the hell out of his beater. :D
PWMAN
05-04-2003, 08:37 PM
Unless the engine is really worn out, you can run 12 PSI without tearing it apart. The stock sleeves will handle 14 PSI, rods also 14, pistons 12. So if you do tear it apart and don't sleeve it you will be wasting a lot of money to get 2 PSI. Well, you mentioned blockguard, that might get you an extra 4 to up it to 18 PSI max. Oh and 12 PSI is the most you can run on the stock 9.2:1 compression ratio with pump gas - 93 octane.
But seriously, if all you want is 10 PSI, don't touch the internals.
But seriously, if all you want is 10 PSI, don't touch the internals.
Automotive Network, Inc., Copyright ©2025
