The car is a 64 Ford Falcon with a 306, VS Racing 7668 single turbo blowing into a carb to EFI converted torquer2 single plane intake. Deka60's, and D581 coils. Using a LC2 WBO2 system.
Before everyone jumps on the air intake temp correction (idle gas law) band wagon, I've flattened it to 102% at -40* and it ends a 100% at 125* then goes up to 106% a 250*F.
Whats making this really hard to sort out is with a non-intercooled turbo car the air intake temp run between 140*F and 150*F all the time while not in boost. Ambient air temp could swing from 50 to 110 and the intake temp will get no higher than 160*F in mid summer.
In my logs I can see the PW is larger in the evening but still yields a leaner mixture.
I've began to wonder if there is a mechanical problem with the engine... or if the injector drivers get warmer in the evening which increases the RDsON value which increases the injector deadtime enough to move the fueling by 5%..?
The WB controller is mounted in the car under the front bench seat. In car temps will follow ambient temps as the car is just old and lacking door seals, AC/heat, ect... During over run fuel cut the AFR shows 21.7 and not 20.0 like I'd expect. Any chance of a voltage drift on the WB analog out wire as the cab heats up from morning to evening?Just tossing out ideas. I'll post msq and a link to a drop box account with the morning and evening logs. Each one is in the 10MB range.
Thanks Ryan
