I did some research into Delco TBI options for my early headed 308 not so long ago, and came to the conclusion that although it seemed easier on the face of it, MPFI was the simpler (and cheaper) option when everything was added up. An 808 can drive low impedance injectors using peak an hold - how ...

And since when is 1 TB better than 2? When the single TB is used with an MPFI setup, but the 2 are TBI :mrgreen: True, but MPFI with 2 TB's to even out airflow across the ports would be better. The setup I'm trying to achieve is not TBI, it's twin TB's with the injectors closer to the head although...

Low impedance injectors operate differently to high impedance injectors. Yes, 6 or 8 high impedance injectors end up around the same load when wired in parallel but a low impedance injector is driven using a peak and hold driver - it is allowed to draw a large amount of current to open it quickly b...

I had a similar notch issue with my alfa, 15 minutes with a die grinder and I had an EFI spec head... Yeah about 15 years ago my TAFE instructor bought an EFI manifold for his 302 Windsor and I quickly pointed out that problem. He was a little bit hesitant to let me die grind the notches in the hea...

I think you could try and run 2 injectors in TBI mode, which would need to be large high impedance ones (the delco can run 1 low impedance in TBI mode, but with 2 groups of 3, you'd need two, thus high impedance). They would need to be large enough to feed that many cylinders thus OEM items would g...

I thought I'd better move the discussion. So I'm just wondering if what I want to do is possible. If not I'll just have to put up with the carbs until I can afford the ultimate setup (triple weber dcoe style TB's with aftermarket ecu).

I have done a 240z with an L20ET and now the same car has an L28ET in it. You will have better results and it will be simpler to run 6 injectors, and one 1 TB. We dont have a final tune yet, but will be willing to share once we've finished. We found that a VN commodore v6 tune, with adjusted inject...

With batch fired 808 delcos the ECU fires the injectors once or twice per cycle - in most (possibly all) factory calibrations its twice per cycle for all conditions. To get something that fires alternately use a VR auto PCM in banked mode, it has two injector drivers. What are you tying to achieve?...

Dylan wrote:Is it true that the sequential injection models revert to batch or bank fire at WOT?

I was told that is true with nearly all sequential setups, but I would not know. It makes sense though.

VL400 wrote:On a VR manual the wiring is split up but the ECU still only has one injector driver so it fires them all at once. The VR auto used bank injection with a cam sensor.

Thanks for the info. Is there any way to make an '808' do what I described in my last post?