Quote:
Originally Posted by wedged
So it actually does not revert to batch fire, it's just not properly sequenced. That is what I thought when I set it up originally. I figured since batch firing is not really timed to valve events, what harm could there be in a random sequential ? As a reminder, my thinking was to have less of a pressure spike in the rails. When I first built this set up, I installed magnets in the damper and made my own trigger bracket with a mini pick up that is the same as the MSD mini. The magnets I used were too small and would loose too much strength when they got up to engine temp. This would cause it to loose the crank signal and misfire. It took me a little while to figure out what was happening. Luckily, I was still testing my crank trigger set up and had not yet modified the distributor to be the cam signal. I simply changed the connector over to the distributor. At some point, I will fix my crank trigger and set it all up properly.
edit:
Brian, you have helped me before on the EFI101 site. Thanks !
I'd really like to see a data base of various EFI tune files with engine specs. I'd be happy to share mine (and take the heat about how crappy they are).
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Getting people to post their tune file in a database is a good idea, however most think this is some black magic stuff and they are the only ones that can do it. It's very hard to change that kind of thinking.
The way you have your engine setup, you have to add more fuel than you would have to in order to get it to run good. In bank to bank mode the ECU will fire four injectors every 90 degrees of crankshaft rotation. In sequential it cuts down the firing and only fires one injector per ignition event. To get this to run without a cam sync you would have to really richen up the tune to get fuel left over at the valve to when it opened it would run smooth.
What about the new Fast crank trigger? It is only 1/16 thick and hall effect.