I was wanting to know how much abuse can the stock B18A1 crank take? I know that Honda makes their cranks very strong to begin with, but if I were to run forced induction how much boost can it handle before I would have to go to a stronger crank? Also what about the bearing caps, cap bolts, and bearings how much can they take?

 

The guy who dyno'd me last had a b18b setup and had a RH stage 2 turbo kit on it and he was running 12psi boost (256whp) with a block guard and then later that week he moved it to 15psi (289whp). He said he's run 18psi at the track with no problems.

He was making pretty good #'s with the non-vtec and pretty much no other mods except hondata, JE pistons, crower rods and RC 440cc injectors.

That thing made one hell of a sleeper.

 

If you want to do any machine work you can have it magnafluxed, cryo-treated and then balanced with the other parts of the reciprocating assembly. Other than that there's not much to do, the stock crank is forged to begin with.

 

Thanks guys for your info. This wil help me alot down the road.

 

I've heard stories of Honda cranks seeing over 500 horse and living to see another day.

 

I would consider putting in a GSR crank if it was me. You'd get the equivalent of a ls/vtec setup with more reliability.

Just my .02

 

But I thought the purpose of ls/vtec is to have the longer stroke of the ls crank for bottom end torque and have vtec for high end horsepower. And if you build up ls/vtec right you can be able to have the higher rev.

 

You can't just put in a GSR crank, you also need the rods. Also if you consider the price of a crank it's simpler to just get the whole GSR shortblock and make use of the oil squirters and girdle.

 

I didn't think about the cost of it, but I bet the cost of installing it would be pretty pricey too.

 

i'll do it for half what you'd expect to pay, but i only accept cash.