Thanks ramo19 i will be ordering soon what will be a good price for the vortech sc and to have it installed?

 

10psi is the max I would go on stock internals constantly.

I'm boost at .5 kpa which is about 7.5psi now, and I'll be upping it to 8.5psi but nothing more. You'll need a headgasket if you want your engine to last any more psi then that.

 

I currently have the inlinePRO turbo kit with a GT3071R turbo and am boosting 9.5 psi and made 352rwhp on a dynapack (very conservative tune--rich and little ignition advance). I recently purchased some new parts from Full-Race, along with a GT3567R turbo, and at 9.5 psi I should make close to 425rwhp on the same dyno. My engine is bone stock. I did purchase an inlinePRO 3mm headgasket, but won't have it installed until I have the head built.

I don't think the question is "how much boost can I run on a stock engine" but "what is the maximum power a stock block can handle". 9 psi on a stock block with the inlinePRO kit is VERY different from 9 psi with the Full-Race kit. So, I'd think more in terms of power vice psi.

Good luck!

 

As a point in reference, there are MANY turbo K20A2s (RSX Type S engine) making 450whp on the stock engine. The F20/F22 has an advantage over the K20A2 as it has both forged pistons and rods.

 

Also, the quality of the tune is HUGE! I cannot stress this enough.

 

Thanks 2QYK4U for all the facts.its nice to talk to people who know there shit..

 

I am far from being the most knowledgeable person on this forum. I know a little bit, and am on a quest to learn more! Good luck on your build!

 

I've always wondered... why is it that I could say run 15 PSI with a GT35 and make X amount of hp to the wheels and if I were to switch to a GT30 I would need to run 19 PSI to make the same HP??? If the PSI into the intake manifold is the same wouldn't the HP be the same as well??? I know that is not the case but I am just curious if anyone can tell me WHY? Never can learn enough about FI IMO... LOL THANKS

 

GT35R is a larger turbo then the GT30 is. Sure its the "same" pressure but the gt35r is moving much more air at that pressure level then the gt30r.

 

Pardon me for not knowing the specific terminology, but I believe it all has to do with the larger compressor wheel and being able to pull more air through. If you were to compare a dyno with a GT3071R @ 19psi and a GT35R @ 15psi, both may make the same peak horsepower but you can bet the mid-range power curve for the GT3071R will be much better. One of the benefits of the smaller turbo is its ability to spool faster.