01-0338R

Has anyone hear heard of any good experience with turbocharging a full B20 setup?Thanks

rainforest

yea basiclly iam going to be the first of many people to tell you this. get a b17a crankshaft. it gives you a perfect r/s ratio. also you will still retain 1.8 liter performace without the bad(not to bad) r/s ratio. and yes this is a raper set-up.

X2BOARD

Don't have the r/s ratios on hand, but this would essentially de-stroke the 20 to a B18, yes ?

I have heard you must de-stroke the 20 to have reliable turbo performance...

01-0338R

So would it make more sense then to just go with a 1.8 Ls (cheaper) Go with like 84 or85 mm pistons, sleaved, and than destroke it with a 1.7 crank? Thanks for the info.

rainforest

if you have the money for the sleeves. i would do that. and iam pretty sure the r/s is 1.75 or 6. with the b17a crank.

Jared

That isn't true. The B20 will last quite a long time making sufficient power as long as you don't try to over rev it. Stick to the stock rev limiter and the B20 will do just fine, it just isn't overly reliable for high RPM power.

Type-ARR

what the rev limit on a B20?

court

b20=b18a/b with a bigger bore
i really dont think the revlimit of the b20b/z varies from the b18a/b

smp534

B20 bore is 84.....LS is 81

rev is same as LS

smp534

if you gonna turbo a B20.....go with 1.7 crank.......Endyne pistons and rods

01-0338R

The B20 is just a B18 bored to 84 correct? Or did honda do some reconfiguration? I want to go with like 84.5 0r 85.mm. Now I know that you should run it with the 1.7 crank. My concern is the strength in the block.Which is going to hold up a sleeved B20 or a B18 bored, and then sleeved. Or am i making any sense??Thanks for the info guys!!

Newman

Why? I've run it for quite awhile at 12 lbs w/out any problems.... and I drive my car hard on a daily basis and race it quite often.