Building up my b18c top end and I don't wanna pull the motor out to work on the block. I'm only trying to get up to around 250 hp all motor. I was seeing if the stock block can hold that.

So anyone with 250 hp and over on a stock block how's it running?

 

What all do you plan on doing? Just a built head wont get you to 250whp

 

With a built head (cut at least .040) and some decent valvetrain, good header, intake, exhaust, and tuning you can probably count on around 210whp.

Back in the day I rolled 206 at the tire with a built head (skunk2 stage 2 cams) and JDM ITR pistons. That was with a race exhaust.

 

I doubt you'll get anywhere close to 250whp. I am mating a built ITR head onto a built b20 bottom end and I won't be putting down 250 whp

 

The most ive seen is 300whp from a fully built all motor!

 

300whp is pretty radical for n/a B series weither its an R or not,....if thats possible itll cost a pretty penny.

 

I think you guys are off track here. The OP need to know if the stock bottom end can hold a 250WHP. Whether how he buld the head and bolt add-on to get to 250WHP is a drifferent story. My take on this...you are really pushing it. If it's me, I would build the bottom end.