Stock b-series internals can handle upwards of 400whp:



Mods: Stock GSR block, 3mm head gasket, ARP headstuds, Edlebrock IM, Full Race manifold, 3" dp., 3" Thermal Exhaust, PWR Intercooler, Tial 40mm wg and bov, Full Race T3/T-Series turbo, 720cc injectors, Warlboro 255lph fuel pump, and Hondata S100.

Dyno Graph: Tuning at 11psi

I'll be taking it 450whp level over winter break when i get more time to tune and work on my car again.

 

what kind of boost you looking to build for the 450 whp?

 

I know someone , won't call names that says he put 30psi into a stock block. This guy is a top notch tuner.

 

i take it that is some extesive amount of tunning

 

There's also the famous Boosteded9 (i think that's his sn) who made over 300whp on a stock d16z6 w/ a headgasket and headstuds. Ran 11's. Only had a vafc and a msd btm I believe.

 

450whp will require around 20psi on my set-up. The key thing about stock internals is keeping the timing out, and keeping the mixture reasonably rich (12:1 minimum). The cylinder pressure is what the stock internals cannot take compared to forged internals, if you reduce the cylinder pressure you reduce the overall stress placed upon the ring lands/rods/bearings. I am in no way hesitant about turning up the boost, the engine will take it without any issues. I have successfully taken another stock block gsr on c16 at 21~22psi to 420whp last year, it can be done.

 

but if you are pulling timming are you going to risk of getting the exaust valves extremly hot?

 

Not really. You increase the fuel consumption to be able to cool down the combustion chamber as a whole, including the exhaust valves. In fact the exhaust valves would see the most benefit as they are going to be recieving the unburnt gasoline at the exhaust cycle phase. I have never really had a problem melting the valves, although it could happen.

 

yes it was just a though

 

You are correct in some sense in that reducing the cylinder pressure will increase the temperature inside of the combustion chamber. Mostly though the heat will be dissapated into the exhaust system since its firing so late on the combustion/expansion phase, so the valves would be getting hotter than usual but it doesnt seem to cause a problem.

 

so if it is getting burnt after the valves the fuel that is the extra burning fuel is going to help spool the turbo becouse the spooling efect is more heat then anything else

becouse heat the the energy that make the turbo spool on the most part of it

correct me if i am wrong