All Things Mk5 > How to Guides / Troubleshooting

Problems with Stage 2+

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iainalpine:
This mite not be the same thing thats happening with your cars but is sounding very like an issue i had with the impreza i had running a GEMS management system amongst other goodies. After many runs on the Dyno and the road the difference we were seeing was to do with air flow. There were higher readings on the road and the mixture was spot on (using wideband sensor to watch what was going on) but on the rollers ran a little rich mid range with the same map being used. Air density when out on the road seemed to be greater when looking at MAF and MAP logs. This was really all we could come up with that would maybe change the mixture of the car.
As i said, this was not ever proven, but with 497BHP and the car running well with no signs of knock on the road, I was happy.

Just thought i post what i had came up against.

Iain

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