Hi Stevie,

As above Denso IK27 Gapped 0.6mm, Had this problem a while came back from sea a couple of years ago and it was evident. Did not affect me before as I was running a gt2871r turbo on it running off actuator alone @21psi.(Held to redline)Then I decided I wanted less lag so fitted a GT2860rs turbo that would boost 21psi until 5500rpm and then drop to 15psi by 6500rpm. So this was the time I started asking about boost controllers which you helped me out with. I picked up the LD performance boost controller as Mark Shead suggested I had a problem with the wastegate being pushed open @ high RPM and that I needed some sort of rev based boost control correction to maintain boost at high rpm.
Unfortunately because of the misfire @ 24-25psi I cannot dial in enough correction to hold 21-22 psi @ redline because of the boost spike that occurs @24-25psi resulting in the misfire.


Thanks.

Tim.