Boost Problem I Think?

[pj-33]

ive got a r33 gtst s2 and its running 13psi on stock cooler and stock turbo, when it was running 10psi it was fine

but my problem is running 13 psi as i pop my foot down it starts to misfire and back fire at 4000rpm

is it cause its running to much boost ? or is it some other problem

cheers

[mad082]

it is going to be a mix of the coils arcing out and if you are still running the stock ecu it is starting to going into it's excess airflow protection. try backing the boost down just a touch. on a warm day, after giving it a squirt a few times in a short period of time any power gains from the extra boost would be gone because the stock cooler suffers from heat soak very quickly. if you want to run that sort of boost then you really need a bigger intercooler.