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E38 Conversion?

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Old Sep 25, 2012 | 02:05 PM
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Default E38 Conversion?

I have an '05 Corvette with an E40 computer (obviously), if I swapped to a 48-tooth reluctor wheel when I change the motor, how easy would it be to convert to an E38 and what is involved? Will it play nicely with the body control module (BCM) and factory gauges?

Also, I assume that the Active Handling ailments are in the BCM and not the ECM, right?
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Old Sep 26, 2012 | 10:54 AM
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Bueller? Bueller?
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Old Sep 26, 2012 | 01:07 PM
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I don't know that you'll find many people who have even attempted this.

Why not use a 24x reluctor and 1x cam gear instead of trying to use a 58x/4x setup?
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Old Sep 26, 2012 | 03:23 PM
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So is your question why not just stick with an E40 computer? The 58x/4x is just what is needed to run an E38. The purpose for switching computers would be better control/tuning.
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Old Sep 26, 2012 | 06:22 PM
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Originally Posted by Jack Package
So is your question why not just stick with an E40 computer? The 58x/4x is just what is needed to run an E38. The purpose for switching computers would be better control/tuning.
Believe me, I know all the benefits of the E38 and would actually love to see a successful completion of what you're talking about. However, the swap would be intensive in that it requires a new harness and may not be compatible with the BCM. That said, I can get the E40 to do whatever I need.

I read your post as if you already had a 58x setup and needed to make it work.
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Old Oct 2, 2012 | 10:07 AM
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Ah gotcha. No, if I had a 58x I'd be screwed. I know it was possible to convert early C5s, but I believe that required a new body harness and (I assume) a new BCM. ECS used to do this all the time from what I hear.
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Old Oct 2, 2012 | 10:27 AM
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Originally Posted by Jack Package
Ah gotcha. No, if I had a 58x I'd be screwed. I know it was possible to convert early C5s, but I believe that required a new body harness and (I assume) a new BCM. ECS used to do this all the time from what I hear.

We do the 97-98 to 99+ upgrade regularly, but not E40 (the computer I hate btw) to E38.

What I would do in your situation is to go with a stand alone Haltech ECU running along side the E40 so all the gauges-BCM-inspection etc function perfectly, while the engine gets it's inputs from the Haltech.

As the driver you would not know it's not stock, but the tuning capabilities are incredible. We have these in stock if your interested and wiring it in is simple. Which relucter wheel you have does not matter, the ECU can be configured for either wheel.
We have easy wiring diagrams to follow, I can have one running in less then a day start to finish depending on options added.
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Old Oct 3, 2012 | 11:36 AM
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That's interesting...piggyback setup like the imports... From what I hear Haltech is very similar to Motech? I assume this would be a speed density setup? Does this have some key-on correction for altitude or DA? Would I have to put my ECM tune back to stock? Would my fuel economy and other functions work properly in the gauge cluster?
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Old Oct 3, 2012 | 12:13 PM
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Originally Posted by Jack Package
That's interesting...piggyback setup like the imports... From what I hear Haltech is very similar to Motech? I assume this would be a speed density setup? Does this have some key-on correction for altitude or DA? Would I have to put my ECM tune back to stock? Would my fuel economy and other functions work properly in the gauge cluster?
The Haltech is very similar to the Motech, except for the price! There are options that the Motech has beyond the Haltech, but they are for things waaaay beyond our use, even on our eight second cars we just scratch the surface of what can be done with it.

I will have to check fuel economy readings, I never noted that but I'm installing one today so I'll post up what I find for you. You will lose your cruise control, but altitude adjustment etc are fantastic. Plus you can have it auto correct if you like, but we have ran cars from August heat to fall temps, raising and lowering the boost for different classes, without any changes in A/F along the way.
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Old Oct 3, 2012 | 03:13 PM
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Originally Posted by DOUG @ ECS
I will have to check fuel economy readings, I never noted that but I'm installing one today so I'll post up what I find for you. You will lose your cruise control, but altitude adjustment etc are fantastic. Plus you can have it auto correct if you like, but we have ran cars from August heat to fall temps, raising and lowering the boost for different classes, without any changes in A/F along the way.
Yes, please do. I'd like to hear more about this setup including any other compatibility issues. Cruise control is a nice feature, but not essential for me (same with fuel economy). Just curious, did you start going this route specifically for the E40 cars or are you also having issues with the E38?
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Old Oct 3, 2012 | 03:25 PM
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Originally Posted by Jack Package
Yes, please do. I'd like to hear more about this setup including any other compatibility issues. Cruise control is a nice feature, but not essential for me (same with fuel economy). Just curious, did you start going this route specifically for the E40 cars or are you also having issues with the E38?
We went this route for our higher HP cars so we have EGT readings with temp fuel corrections and high temp shut down, dual wide band, WOT corrections, two step built in, launch control, individual cylinder control, etc etc etc. Yet the car drives and looks like stock.
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Old Oct 4, 2012 | 02:39 PM
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Nice. Can you tell me more about the launch control? How does it work? How does it activate? What inputs does it use?
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