Does the e40 or e67 support 24x cranks ?

[HyeSpeeder]

As the title says... do any of the newer ecu's support 24x cranks

Was the 05 ls2 a 58x with 4x cam ? I remember one of them having a 1 x cam gear for some reason ?

Anybody ?

[MikeOD]

The E40 suppoorts 24x crank 1x cam signals. It was used in the first LS2 cars that did not have 58x/4x signals.

[ScarabEpic22]

MikeOD is correct, E40 was a short lived ECM that served as a transition for GM from Gen III to Gen IV. An 05 LS2 will have a 24x/1x reluctor setup and would have come with an E40. 06 LS2 in a Vette would have 58x/4x, every other LS2 for 06 was still 24x/1x (in the US). 07+ were all 58x/4x.

[HyeSpeeder]

Very interesting thank you for the response .
So would the e40 be a good ecu to boost ? and do i have to run a separate tcm ?

Mainly are the spark airmass tables scale able ?

[LSX378]

Yes on TCM required. Spark airmass axis. Doesnt appear to be editable.

[LSxpwrdZ]

You can scale the entire tune however to get around the 512g/sec airflow limit and will increase the headroom you have on the spark airmass table as well.

[HyeSpeeder]

Right ... but it will become a tuning nightmare and throw off all other tables .... and it probably wont report correct injector duty cycle right ?

[DSteck]

Right ... but it will become a tuning nightmare and throw off all other tables .... and it probably wont report correct injector duty cycle right ?

It's not a tuning nightmare. People do it all the time.

Injector duty cycle calculation has nothing to do with scaling. It's simply calculated based on injector pulsewidth and engine speed.