These are the only dyno's I have re the tune which as you can see were done a while ago. The tune was never completely finished because my tuner was borrowing a dyno on the day and ran out of dyno time. Also need to fix up the boost drop in the top end. Note the ambient temp was around 36 degrees when these were done. I have had it on another dyno since in cooler conditions and it made a couple of more psi across the board at the same rpm - for instance it was making 26 psi by 4000rpm - no printout to show unfortunately.
This dyno done in 4th gear - (5th is 1:1 in my car as I have a 6 speed close ratio Nismo box).....also shows 24psi by around 4000rpm even in 4th....5th gear (1:1) is better still.
Same dyno as above overlaid onto a different s15 with single scroll 3071 ex gate on 6boost manifold 256/256 poncams and stock intake.
This dyno done in 5th gear (1:1) after retarding the ex cam a couple of degrees - picked up more low and mid and lost top end - revved to 8,000rpm although shown in klm/h. Notice how it holds up power reasonably well at this rpm even with the 260 hla's......in any case the power nosing over is more likely attributable to the boost dropping as show in the dyno. Boost curve in general is a little rough
I know the scaling is crap on the horizontal line. One day I will get a better printout.
11-21-2009, 05:21 PM
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