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gavinc69 gavinc69 is offline
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Join Date: Jul 2008
Location: Bournemouth UK
Posts: 996
Garage
One problem I'm just going to start on is the fueling.

If the car is left running idle for say 10 to 15mins and you then rev it you can tell its missing due to over rich mixture (when the plugs are pulled they are black with dry carbon).

My AFR's seem fine, aprx 13.8 warm idle, 14.4 cruise and 11.7 on boost.
The car does surge on a cold start up for a short while which I understand is due to too rich mixture..

If I lean the idle mixture it also affects the rest of the AFR, so something like :

Idle warm 14.4 gives boost AFR of 12.4

When the 930 WUR was rebuilt to standard spec I ask for it to be made adjustable. The only option they would offer was to drill a whole in the bottom to allow warm/boost adjustment.

So am I right in thinking I need cold adjustment option on the WUR to be able to get everything dialled in correctly?

I need to lean the idle and maybe cold and then richen the boost.
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Old 03-01-2015, 12:35 PM
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