92db2gs-r

i have a healthy stock block b17. is 7psi safe with a good dyno tune? my compression ratio is 9.7:1

CDecker0218

I ran a stock B17 block in 2009. Made 340whp at 11.8psi. ran it for the whole summer. When I took the block off to install a b18c1 it looked good.

MR.johnson

330-350 after 370 the ring lands will fail. well at least doing 5th gear pulls.

Schister66

Its not about the boost level...its about how much power it can handle. Most B series engines are safe into the 330-350whp range...some people have pushed them further, but beyond the mid 300s, you're rolling the dice.

92db2gs-r

so my stock rods and pistons will be safe at 7psi? ive known people that popped their stock motors at 9psi even with good tunes.

evilclown312

iTrader: (2)

Your reading isn't up to par is it? If that 7 psi is not going to put you into the 360+ hp range, you will be fine!!

turbo-2nr

we make ~500 all the time on stock bseries they are reliable and last 20k+ miles its just all about a healthy motor and a good tune
the b17 is no weaker so you will be fine

92db2gs-r

well i was starting to think you guys were talkin about the blocks themselves ******* ie stock block and sleeves with forged internals. i havent heard of anyone making numbers like that with stock internals.

LightningTeg

https://honda-tech.com/forums/showth...ht=stock+block

There is no number. And I dont believe its a crapshoot. If the motor is healthy, and tuned safley, you can pump as much power as you want through it. The margin of saftey as far as things breaking decreases with more power because the heat is much greater and the slightest detonation increases cylinder pressures tenfold and that is what breaks ****. All your doing when putting forged internals in is increasing that margin. A bad tune or detonation is still gonna kill things then to.