Hi everyone. This morning i picked up a 1990 CRX DX with a blown motor.

I was thinking of possible motor swaps, and a B20b came up. Id imagine the motor is pretty good for turbo, low compression, high displacement, etc... Plus, the longblock can be had for 6-700 bucks.

How much boost can a stock motor take? Im gonna rebuild whatever motor i get before i drop it in, just for piece of mind.

I did a search, but there was no "B20" in all of the forced induction forum.

Thanks!

 

the sleeve designs suck. they crack way to easily. just get an ls, and if you want more displacement slleeve it and bore it out

 

how much boost can they take?

Im on a budget, and i jsut want to piece together a kit to get mabye 200whp.

 

I'm actually in the process of B20z supercharged......As long as you keep the pressure LOW, you will be fine. It will be a fun/peppy build, but not v8 killin'.

 

how low is LOW? like 7 psi?

 

Honestly B20's have weak sleeves but usaully any motor can take 10 psi.
Just make sure to get it tuned by a really good tuner timing is going to be critical.

Blundar
Joseph Davis
Jeff Evans

You need a tuner on their level. Then the B20 should run fine.
I see so many b20's in the junkyards around here I'm kind of tempted to grab one and try it out.

 

building a b20/gsr head myself, have turbo intercooler whole set up, ill let you know in a couple weeks how its runnin

 

We have a EG with a stock B20 block and head. Putting 10 lbs boost on a Hondata S300 and 550cc injectors. Put down 230 whp and 220 ft.lbs, runs 12.4 at 108 mph. Been running for almost 2 years now.

 

i'm also on a b20b turbo i just sent the block to be sleeved 2 days ago i already have my fully built head and pistons rod but still shopping for the right turbo and i'm going to try motec or micro tech ecu's

 

here is a b20 with stock sleaves oh yeah with a vtec head
Car: Integra

Engine: B20vtec, stock sleeves, 84.5mm, 9:1 comp, skunk2 valvetrain, CTR cams, GE cam gears, skunk2 IM, skunk2 70mm tb

Mods: Log manifold, t3/t4oe 60 trim .63a/r, 2.5" dp, 3" exhaust, custom 2.5" charge pipes, blitz bov, tial 38mm gate, dumptube, turbo xs dual stage boost controller, RC 550cc injectors, walbro 255lph hp pump, neptune

Tuning at 9psi and 13psi on 93 octane:

 

what tranny would be better for b20/turbo? and what engine managment are you guys using?

 

one of the biggest pitfalls is not only its sleeves but its lack of the "standard" honda PCV system. ALL of the B20s pressure comes thru the head.

you need to set it up properly on the back of the block, the spots are there, they just arent used