Did the search function, no definitive answer so I turn to a new thread...

I have the Comptech S/C with stock pulley and aftercooler.

I was wondering what size pulley/psi I could run on this setup without having to go to engine management/tuning? And if I were to do this, would it be safe for my engine or would I be running to lean?

So if you guys have any experience or read/heard anything please let me know! I would like to break the 300 rwhp marker.

Thanks in advance guys!

 

other then running stock boost you'll need to get some type of engine management.

btw what are you putting down?

 

So there is no way possible to upgrade to a 7 psi pulley without software?

I put down 295 hp and 201 tq.

 

you can do 7 psi without any engine management, just need to get the FMU tuned.

 

its a 4 inch pulley

 

stock pulley for ap1 is 4.6 i think. you could run a 4.0 no problem, making AROUND 7 psi (could be 6.5 or 7.5 who it always depends, i got a 3.875 because it makes 9psi for most people, im making 11psi at 9000 now however. Just save up and go a little higher in boost with ems eventually, you are going to likley do it anyways, this way you will save money and dyno time by doing it all at once.