RX7heart

I have a series 5 13bT after maket computer, 3inch exhaust, top mount cooller and a standard turbo.
I can get air temps of 5-10 degrees(celcius) and running 10psi at the end of 400m they are less than 30. How much more boost do you think I could run. I also run a mix of toluene in with 98ron fuel when racing.

S2-13BT

I have the same engine in my S2, and I've been recommended a max of ~13psi. This is with after market ecu, 2.5" exhaust, standard cooler mounted at the front and a standard turbo.

I think the standard turbo starts to get to the end of it's efficiency range by about 15psi and starts to make more heat than anything else.

So... I probably wouldn't go any higher than 15psi and make sure you tune the car well.

KraftDinner

Definitely not higher than 15, I've heard 13psi being a number thrown aroudn a lot for when the stock turbo is pretty much at it's limit.