Ls1 ecu to 304 Motor

[wall-ace]

hi. i need so info on using a ls1 ecu on a 304 holden efi motor. i hear that people are using ls ecu, but only one ignition coil, grouped injecton, so a vn dizzy hall effect ( not a vt sequence). so im guess that they are use the vn dizzy for crank reference. and no cam signal. and setting the firing order to ever cylinder to 1.
This is the only way i can think it way work, can someone help thanks peter

[0081]

Sorry I can't help out there but what's the reason wanting to run the ls1 computer ? Sounds like a lot of work when the stock computer has so much potential or even look to run the 12p or 11p code

[vn5000]

Ive never done it but ive heard you run pcm in lo res mode , use a vt dizzy with cam sig , and tie the coil outputs together with diodes

[Dylan]

Could the coils be connected inside the PCM case?

[Dylan]

would that retain sequential spark and injection? Given its still receiving a cam signal.

[vn5000]

Not sure , I think it does though.
If it does you could still use 8 coils

[immortality]

One tuner was offering a full 304 LS PCM conversion with coil per cylinder etc. He used to be on the SC forum a lot but forget what the outfit is. Wasn't cheap either, if I remember correctly you wouldn't get much change from $2K.

TBH there aren't that many gains other then lots of tuners know the LS PCM's.

[VL400]

This thread - https://pcmhacking.net/forums/viewt ... pcm#p41555 - was a dead end after the poster decided to not share info, but may have something useful still. Has a link to the V8 kit.

[wall-ace]

Can anybody tell me what does the 'low res mode' is and what it adjusts? Thanks

[Jayme]

the ls1 ecu expects 24 crank pulses per revolution. the 304 dizzy provides 4. low res mode tells the ls1 ecu to expect 4 crank pulses per revolution.

another option would be to put a 24 tooth wheel and pickup on the 304 crank and then run the ls1 ecu straight up with no mods. depends if you are better with working metal / engine parts or better with electronics I spose.