Quote:
Originally Posted by 911st
My understanding is a stock 87 930 motor needs the Lambda computer to run.
If you have the Lambda computer you can unplug the O2 to disable the Lambda function so you can run richer but you still need the computer.
Alternately you can have the Fuel Dist modified so it no longer utilizes the lambda frequency valve (closes up an internal passage ) or use a non Lambda fuel distributor.
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Further, one other possibility is to use a different driver in-place of the Lambda computer.
This can be accomplished using a Split Second Timing -- Additional Injector Controller.
With this you can lock the Frequency Valve at a 50% duty cycle which is basically what unplugging the O2 dose with the Lambda computer.
With this you can also use the AIC to provide additional tuning ability such that you can better tailor your Air Fuel Ratios along the RPM curve by load (manifold vacuum). You would also be able to make for acceleration enrichment. Not to be confused with increasing gross fuel delivery on boost.
There is a thread here somewhere where the owner even felt he was able to increase gross fuel delivery by manipulating the Lambda / Frequency Valve with the AIC.
Such an AIC has two channels and the other can be used for some fun things like turning on a shift light or ruining an additional frequency valve to manipulate Control Pressure for further tuning potential but that is another story.
What the AIC will not do it act in place of the Lambda computer as an emission's device at idle and cruse.
Again, it would probably be easyer to send you Fuel Distribuitor out to FlowTech to be refreshed, possably adjusted for increased gross fuel delivery potental if you are going for big HP, and modification to remove the Lambda circut so it operats like a non Lambda / early euro fuel dist.
Gone.