58x to 24x crank sensor with gen iv ecm

[edcmat-l1]

As you may know already, most tuning software only accesses a portion of the overall code within the OEM calibration.

The OEM E38 and E67 calibrations both contain coding for the CKP Sensor and the CMP Sensor.

Changing the parameters from 58x to 24x, and from 4x to 1x is reasonably straight forward for anyone who has worked with a raw calibration and added additional parameters to tuning software for their own use.

I briefly looked at this a decade or so ago - just for fun. I came to the realization that there were additional tables / diagnostics that would also need to be mapped, and then added to the tuning software, to achieve an OEM level of operation.

In my case, it was not worth the bother (hours) for such a limited use functionality.

I absolutely know that. I have IDA Pro, Ultra Edit and WinOLS. I've dabbled in hex quite a bit. Did some Euro tuning for a little while long before HPtuners added Euro support. Locating the switches would be the easy part. Rewriting an operating system on an OE level is something completely different.

I'm not saying it can't be done although I do have doubts. I'm questioning the validity of it has been done by the person claiming to have done it.

I stand by my original comment that some people will believe anything because they read it on the net. Keep in mind I've been around at least as long as Jessie Bubb. I'll leave it at that.

[Shrek]

I absolutely know that. I have IDA Pro, Ultra Edit and WinOLS. I've dabbled in hex quite a bit. Did some Euro tuning for a little while long before HPtuners added Euro support. Locating the switches would be the easy part. Rewriting an operating system on an OE level is something completely different.

I'm not saying it can't be done although I do have doubts. I'm questioning the validity of it has been done by the person claiming to have done it.

I stand by my original comment that some people will believe anything because they read it on the net. Keep in mind I've been around at least as long as Jessie Bubb. I'll leave it at that.

No kidding.

I do not disagree - that the internet is a huge source of misinformation.

However this was your quote to Fast4.7 ...

Please, point me to where an E67 gives me a choice between a 24X and 58x reluctor.

Those parameters are indeed within the coding - so the totality of your own comments are somewhat contradictory.

How long you have been around is often irrelevant. I have known plenty of tuner shops that can only tune the airflow - after more than a decade in business, and that don't have a clue about enabling additional PCM / ECM / TCM functionality in a conversion project (specialty vehicle).

I became involved with LS conversions at their very outset. Over the years I have chased down more than few parameters and functionality within the OEM coding. This often takes a great of time (cost), so as a business owner I only pursued functionality that would reasonably provide a return on the investment.

Having a Gen 4 ECM properly operate Cruise Control and Starter Control were popular options, and a worthwhile pursuit. I do not know of anyone, other than myself, that fully sorted these out across all E67 operating systems.

While sorting out a Gen 4 ECM correctly operating a Gen 3 engine was interesting from an intellectual standpoint, it was not a practical investment - as I had no significant demand for this feature.

I have no doubt that it could be done. I simply do not believe that it is worth the effort (time), from a commercial standpoint.

[Alvin]

"Don't believe everything you read on the internet"

-Abe Lincoln

[Bkauto1]

Alright everyone. Just thought sense I was the one who brought this topic up and then kind of went ghost I'd give everyone an update. I was unsuccessful at creating a tune that would run the gen 3 engine on a gen 4 ecm. However the more I tried and the more information I obtained I know it's possible and it has been done before. But everyone wants to talk about it as a commercial stand point and say "it's not worth it" and I'm not experienced enough to accomplish it with guidance from someone. So I gave up that route a few days and I went the mechanical route. I saw there is bolt on kits already out there for adapting a external crank sensor onto the crank pulley/ harmonic balancer. However I didn't really feel like spending $500 plus on that so I made my own. I bought a factory 58x reluctor ring, $30 bucks, tig welded it to the back side of the pulley, bought a factory cam timing gear 27$ and a front cover with a sensor hole swapped it all out. Made aluminum bracket to hold the crank sensor out of some scrap aluminum I had laying around and used 2 timing cover bolts to hold bracket in place figured out the position of all the time marks in correlation to the crank sensor wheel and put the pully and reluctor wheel on lined up in place. Relocated the crank sensor connector. Fired right up on factory tuning. I did a crank correlation relearn procedure. Then adjusted some of the tune to be for 5.3 rather than 6.2 and it's all running perfectly and this solution took me a few hours and less than 100 bucks.. so yeah thankfully I ignored the guys saying "your screwed" gotta pull the engine apart and change the reluctor wheel.