Build the engine then boost, simple as that.

 

Thanks. We're not crazy. And ps90 has a good point. Injectors won't necessarily last long trying to push a lot of hp...but you could, technically, get away with a lot of boost on a smaller turbo! For instance, a small variety of the TD04 family might easily achieve 18+ lbs of boost on the motor, and still only make 210-215 hp....So....

 

turbonetics turbo has an exhaust A/R of .48and a V trim t04b compressor... what boost with stock motor and injectors would be fine?

 

It's rated 325-425 HP. I don't think there is a good boost level for that!

 

to play it safe for now go as low as you can i'm running like 5-6psi
happy as brit. spears with a shaver

 

And again, at that point, it's pushing air, but it's a negligable amount, and it's well out of the "efficiency" of the turbo, meaning it's hot....
That can cause detonation, and destroy the motor. That turbo is sized very poorly for a stock fuel system, stock B18 motor, at any boost level!

 

Its not about the build its the tune that matters. As long as the tune is correct the engine will be fine on 8 to 10. I know guys that are running stock internals and are at 15 and drive them everyday all day long. Hell when Brian was alive he was running 24 on a preaty much stock Type R.

 

The tune won't matter if he is on stock injectors. That seems to be the main point here. The O.P. asked how much boost he could run stock injectors wich realy isn't much to tune with anyways.

 

Thank you!
I stated already, with the right size turbo, and a proper tune, you could push upwards of 20 psi on stock internals, with stock injectors. Read the thread. It's not that long. But, it all depends on the turbo, the HP at a given PSI, etc.

Tune is very important. Any knock at 300 hp will pretty much kill a stock internals Honda motor. A realistic goal for stock injectors, stock internals, would be about 20-25% above stock HP levels. Anything over that, and you'll require more fuel management than a piggyback, like an adjustable fuel pressure regulator, which, in turn, with high pressures, will cause injector failure at a rapid rate. Again, something already pointed out in the thread.

 

http://honda-tech.com/zerothread/1323059

if you want to take a little time there are plenty of stock motor ls-t's in there with boost ranging from anywhere to 5-20 psi of boost.