hi guys, i have a stage 2 s13 running the necessary mods, I think it still has the standard down pipe which will probably be holding back some power. manual boost controller, t28 of some sort(been told it might be out a pulsar) with a HKS adjustable actuator, the boost doesn't kick in till around 4,500 rpm but when at full boost it all feels fine, i have cleaned the afm, tightened the actuator arm. the wastegate was moving fine so can rule that out.
any 1 have an idea what this could be?
boost leak? when it hits 4.5k it sits at 14psi and holds solid so does that rule out a leak?
i had a look at how the manual boost controller is set up and its totally different from my mates s14 ?
cheers kyle