I bought a 2004 infiniti g35 off a previous owner, he had installed a stillen supercharger stage 2 kit onto the stock engine. It is currently at 5-6 psi of boost and its pretty quick. I was wondering though what would i need to get to be able to increase that psi up to maybe the 12-15 range. I checked out some forums but didnt really find anything so im hoping to get some clear simple answers.

 

You might be able to get it to 10 but thats probably about it. Get a way smaller supercharger pulley and a way bigger crank pulley. Also if you can find any one to port the blower that will help.

 

What would i need to add to the engine to allow it to get up to 12-15 psi is what i meant, sorry i wasn't clear on that

I do got a stillen intake and intercooler. What is the specific pulley size i would need to get?

 

You'll be fine on the stock internals, you will need bigger injectors and a retune.

Edit: there is nothing you can do to the "motor" to Increase your boost. If you want to increase your boost you need to spin your blower faster. A better intake and exhaust will also make more power.

 

I have a stage 4 kit, 11lbs boost. Its been ported as well
the faster the blower runs the more heat you make.
it to small for the 3.5 engine.

Z

 

Something tells me the Stage 3 and 4 are prone to causing the bottom end to fail. At 10-12 psi at stock compression, I'm thinking the lack of warranty on Stage 3 and 4 speaks volumes (while warranties are available on Stage 1 and 2). I'm not an FI guy, but the DE runs pretty high oil temps without FI... with it, they have to be insane. So hopefully you have a oil cooler on there as well. Honestly, the more I think about it, it seems like a lot of extra workload to put on the engine for an additional 40 hp.

 

Any way to get a better Intercooler in there to cool down the discharge? Videos of said car and what type of power do you make?