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Discussion Starter · #1 ·
I put the R33 on the Dyno to check out a miss at high Rpm and Dyno showed that the Fuel/Air Mixture is getting rich above 5000 rpm. The Dyno was showing 30bhp down over standard.
Up to 5000 rpm the car performs correctly, just goes bad once the second stage boost comes.

The car has a de-cat pipe and a K&N filter fitted.
Any idea what could be causing the car to go rich over 5000 rpm.
The boost gauge indicates up to the 3/4 position and the tuner said the boost is working fine.
Any feedback would be appreciated
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