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jeff91C2T jeff91C2T is offline
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Join Date: May 2001
Location: Central Coast
Posts: 278
Interesting points...makes sense that the plate gets out of sink with respect to the air flow requirements as soon as we starting making changes. As mentioned earlier in this thread, I saw a similar instance where a stock 91 turbo was dyno'd and it had a pefectly flat AFR result. Then we dyno'd mine which had the classic rising afr to 6k (running headers and no cat).

Not sure if this has been added yet...but the audi turbo crowd has chased this quite a bit as well. Below is an older link discussing measuring the throw on the fuel plate which seem to be discussed here quite a bit;

http://www.sjmautotechnik.com/trouble_shooting/outofuel.htm

Seems like a good idea to add an air handling device (either on the fuel plate or in the cone) to help flatten out that curve. Trial and error could lead to to a few versions for different mod's.
Old 03-09-2009, 09:03 AM
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