I have heard connecting vacuum from the charge carrier to the fuel pressure regulator and doing some adjustment to the metering unit will increase the capacity of the KE-Jetronic. Is the adjusment done to the electro-magnetic pressure actuator that sits on the side of he metering unit? There is a small screw on the back and. My guess that this screw adjusts the base pressure that the fuel ecu does adjustments to when on full open throttle etc. Of course all adjustments must be done with a wide band lambda to analyse the mixture.

 

yeah u must be on about the fuel pressure mod what i have done, there is a small screw inside what u adjust, its very sensitive though

 

I did some runs with Innovative LM-1 wide band lambda and the fueling was good at 14-16 PSI of boost. First the mixture was 11.4:1 but after leaning it a bit out with the CO screw it showed 11.7:1. Consistent fueling through the revs. The mixture should be between 12:1 and 13:1 for maxium power and a little on the lean side dosn't hurt when I'm running standard intercooler. I must get a new intercooler before I turn the boost up.

 

Do you have vacuum on the fuel pressure regulator?

 

I'd advise around ideally 11.7:1 on boost otherwise one bad batch of fuel and your engine could be history.

My engine sucks KE-Jet dry at around 11 PSI boost.

 

Mine fuels good at 16 PSI, you might have it checked. The only none standard item in the fueling is a Bosch fuel pump for Cosworth.

 

No more fuel will come out of the KE-Jet. I either have to change management or fit a 5th injector.

 

no i dont have a vacuum pipe connected to it, apt just modified my fuel pressure, to keep the fuel there up to 20 psi, checked on their lambda on the road and its fine (done 9k now on new engine), no pinking, fuel isnt to bad, i get 210miles out of 34 quids worth of tescos super (which my car loves over optimax now)

went to santa pod there and back last weekend 260 mile round trip, done 3/4 of a tank cruising at 70 to 80 mph.

so the need for a 5th injector isnt always the only opition to fuel for lots of air input, as my car shows, but it depends on the tuner i suspose

 

i read something on nms , quite interesting i must say