I have a Jap Spec WRX MY93 with a MY95 Closed Deck STi engine and Type RA ECU. It was running 287bhp when I had it dynoed running 1.0 bar with standard injectors, full turbo back Mongoose decat, standard TD05 turbo and no dump valve. I have since added a Bailey dumpvalve and induction kit.

I am having 550cc injectors fitted this week together with uprated fuel pump, HKS EVC, HKS AFR, HKS Fuel Cut Defenser, HKS Iridium plugs and Samco Turbo hoses.

I would like advice on what boost my engine could run.
Incidentally it always runs on Optimax and Octane Booster.

thanks in advance everyone!

 

I would also be interested in opinions on what heat range of the HKS Iridium to go for. Should I fit heat range 7 or 8.
(In other words with the state of tune of the engine will range 7 be cool enough to avoid detting).