Coil per cylinder 4.3?

[ericjon262]

2007 up lu3 is 58x. Didnt see that posted yet.

I think most everything GM is 58x now, I'm pretty sure that happened around 2007. I'm mainly looking at 24x, specifically the 0411 because it is so well supported, and because I don't care for DBW throttle. Something someone with a test bench may be able to try is just changing the cylinder count on an LS1 file and seeing if it still fires.

[JeepsAndGuns]

Well the V8's use a 24x wheel, that 8x3. So could you do the same with a 6 cyl? 6x3=18. Could a 18x trigger wheel be made, and possiably a V8 file be modded to use it? It seems to me this would give the same resolution for a V6 as it has for a V8.

Or, if all the newer engines use the same 58x wheel, weather they are 6 or 8 cylinder, then could the 411 code simply be re written to use the same 24x wheel it uses on the V8's, but just run 6 injectors and coils instead of 8?

[RobertISaar]

GM made a V6 application with an 18X signal... roughly 87 and up 3800s. they have both a 3X and 18X output. PCM only uses the 18X signal up to about 1200RPM and then switches to using the 3X due to better accuracy above that threshold. both signals are created by the 18 equal sized notches in the reluctor, but the 3X signal is created internally from the 18X signal after being passed through a /6 operation.

there is also a 3X reluctor on the same pulley/ring, each has a different width of notch to indicate to the ICM which cylinder pair is coming up on TDC. the ICM NEEDS both of these signals to operate. if either is gone, no fuel or spark.

[ericjon262]

I'm starting to think the crank sensor wouldn't be as big a deal, I'd bet a 24x would run it, if not the real trick would be figuring out the pattern, because it doesn't appear to be simple. keep in mind, 24/6=4, so it's still an even number of notched per cylinder, whatever that's worth.

[ericjon262]

I'm starting to think the crank sensor wouldn't be as big a deal, I'd bet a 24x would run it, if not the real trick would be figuring out the pattern, because it doesn't appear to be simple. keep in mind, 24/6=4, so it's still an even number of notched per cylinder, whatever that's worth.

maybe it wouldn't be so hard though, there's always the short*, it had coil per cylinder, and a single dual pattern crank trigger much like the LSx engines, but I'm unsure of the trigger tooth count or spacing.

[ericjon262]

without knowing the accuracy of this diagram, the shortstar APPEARS to also use a 24x crank trigger.

http://www.tonkinonlineparts.com/sho...category=22670

[JeepsAndGuns]

Looking at that picture it looks to be part of the crank like the northstar. I guess you would just have to find a picture of the crank out of one of those engines. I tried google searching, but came up empty handed.