It runs !!!!! mickey mouse engineering prevails :), Mallory Dizzy AND D-Jet working together Options

[Mueller]

Background:

For the stock D-Jet, the ECU gets the signal to fire the injectors from a set of mechanical breaker points inside the base of the distributor. There is nothing wrong with the factory method except for the fact that if you want to run the D-Jet injection, you have to keep the factory distributor...not anymore (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

I have successfully been able to electronicly trigger the ECU from a pair of optical sensors inside of the billet Mallory distributor....so far I have only put a few miles onto the car with this setup and I don't know how it'll work when the temperature is much higher (currently it is 45° outside.....)

it's ugly right now, but give me some time to clean it up... (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)

(IMG:http://www.914world.com/bbs2/uploads/post-2-1106100569.jpg)

So for my ignition, I have the Mallory distributor, accel coil and new 8.5mm plug wires....starts right up and idles fine, but I might install a CDI box anyways...

[lapuwali]

QUOTE (KenH @ Jan 24 2005, 08:46 AM)

Some time ago - sombody indicated there was an optimum relationship, depending on driving conditions. I will try and find the info. Another way to do it might be to "trigger" an IC "divide by 2" off the points and feed that to the ECU. Hummm Ken

If there is an "optimum relationship" between timing of valve events and timing of injection events, it's mostly theoretical, and will only be effective at light loads and low revs.

L-Jet works very well, and doesn't time injection events with spark events. It only uses the distributor input to determine engine speed. K-Jet also works very well, and it's injecting 100% of the time. No timing of injection to engine events at all.

True "sequential injection", which times injection events to valve events, can help a small amount near idle for smoother idle quality. It also has some effect on reducing idle emissions. If you hunt up the DIY EFI email archives, or go over to the MS EFI board, you'll find the details. The short answer is that the injectors are open for so much of the cycle at higher loads that timing them simply makes no difference.