CT has told me that I can go up to 8psi on the FRP that came with the kit. Talking with SOS and they say I must do a AEM FIC? Done a lot of searching and cant find a solid answer about tuning. Is it a must for the upgrade or is a 7psi the max on the FPR's range?

 

with the rr fpr i was under the impression that the consensus was the ap2 7 psi pulley for the ap1. anything greater than that and you'd need a standalone and injectors.

 

it depends on your exhaust setup too.

 

Well with my front mount, IM getting under 3psi on stock pulley. I think the FRP can go to 7psi, so if I get the 9psi pulley I may still be at 7-7.5psi of boost - safe for the FPR.
Does this make any sense or am I crazy and just go with the 8psi pulley and tune the FPR and be happy.

 

I didn't understand you when you called on Friday. Are you saying that you're getting a 3 psi drop over the core? The engine cares about the pressure in the manifold. So, you could use a smaller pulley to bring up the manifold pressure (we have these on sale now if you're interested).

However, if you're seeing a 3 psi drop through the inter/aftercooler, I'd probably want to look at changing that setup.

regards,
--Chris

 

Its about a 2- 2.2 psi loss. It is a big front mount so they told me to expect 1.5

Just ordered a 3.8in