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6l80e and Holley Terminator X Max

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Old Nov 17, 2020 | 09:50 PM
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Default 6l80e and Holley Terminator X Max

Holley Terminator X Max does not support a 6l80e. However, I contacted Zero Gravity Performance who sells the TCM-2650 6l80e controller which only needs two inputs from the Holley efi: rpm and tps. Rpm is easy as the Holley efi has an output for just that. The tps however, is not that simply. There is no “tps” output like there is for the rpm.

the terminator X Max is for DBW applications. I am using this on a gen 4 ls engine (L76 6.0).

I am wondering if I can tap into the DBW harness to get my tps for the TCM.

has anyone tried this? Or can anyone weigh in on it?

The guy I spoke with at zero gravity performance said that he knows people have used their product with Holley efi.

the Holley tech rep said they advise against messing with their harness.

Last edited by The0nlyon3; Nov 17, 2020 at 09:56 PM.
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Old Nov 17, 2020 | 10:55 PM
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Does it require a 5v TPS input? You're not going to get that from the DBW.
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Old Nov 17, 2020 | 11:06 PM
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If it's able to used as a stand alone with a carb then it should work as a stand alone while using the Holley, It just won't get the TPS signal from the Holley... It has to get the same signals with a carb setup so you must be able to hook up a TPS the same way it configured with a carb.
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Old Nov 17, 2020 | 11:20 PM
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The TPS can be hooked to the throttle pedal in a dbw application.
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Old Nov 18, 2020 | 12:11 AM
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Originally Posted by AwesomeAuto
Does it require a 5v TPS input? You're not going to get that from the DBW.

I have a diagram from Holley for the DBW pedal. Looks like pin B8 is 5v sensor. There are also some tps pins too



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Old Nov 18, 2020 | 06:39 PM
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I will test this out and post my findings on here.
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Old Jan 4, 2021 | 09:11 AM
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Update on this?
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Old Jan 4, 2021 | 09:27 AM
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Originally Posted by The0nlyon3
I have a diagram from Holley for the DBW pedal. Looks like pin B8 is 5v sensor. There are also some tps pins too


I think what you want to use is Pedal #1. My fear is that with something else hooked into the loop, you may not get a successful TPS autos, but I do not know that for a fact.

Andrew
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Old Jan 4, 2021 | 05:52 PM
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usually ADCs have pretty high input impedance, so as long as you wire well, it SHOULD work fine.
What you need to check is on the DBW TB there are two tps outputs, one is inverted. you will need to make sure you tap into the non inverted one.
edit: i see you are planning to tap into the pedal instead, my understanding is its the same as the tb as far as one being inverted.
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Old Jan 10, 2021 | 06:17 AM
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Pretty expensive trying to use a 6L tranny with a holly setup.
seems a lot cheaper to a stock ecm and harness.
It does suck holly isn’t going to try and make holly work with a 6L tranny.
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Old Jan 10, 2021 | 07:21 AM
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Originally Posted by LS1 pwrd NOVA
It does suck holly isn’t going to try and make holly work with a 6L tranny.

I agree. Holley should really make a commitment to make their Terminator X Max control more GM trannys . Their Gen V system only operates 4L60 and 4L80s. I am betting people are getting drop outs with a 8 or 10 speed trannys and forgoing Holley because they cant drive those trannys
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Old Jan 10, 2021 | 07:23 AM
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Jimbo, I was ready to buy one until I saw they can’t do the newer transmissions.
O well maybe one day
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Old Jan 10, 2021 | 03:19 PM
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The 6/8/10Le transmissions are completely different in the way they are controlled compared to the 4L60/65/70/80 transmissions.

The 6/8/10 transmissions have the control module built into the transmission itself. Holley would have to hack the GM CAN code and they are not going to do that for a host of reasons.

Andrew
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Old Jan 10, 2021 | 05:21 PM
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Even so, that really sucks and is going to cost them a lot of sales. Tuning and matching Gen V stuff with different trans can really suck. I would have just bought a terminator if it would control a 6l80. Who wants to get newer motors and run 4 speeds? Prob nobody if a better option existed.
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Old Jan 10, 2021 | 05:43 PM
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I’m sure that most of you guys are aware that development of this kind of stuff takes a lot of time, effort and financial resources to bring about and comes in incremental steps. Holley is well connected to the user base of its EFI products and is aware that users are wanting to use these later model transmissions in LS and LT swaps. I unfortunately can’t provide any specific information about development work that may, or may not be taking place relative to this as it is against company policy to do so.
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Old Jan 16, 2021 | 03:04 AM
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Originally Posted by LS1 pwrd NOVA
Pretty expensive trying to use a 6L tranny with a holly setup.
seems a lot cheaper to a stock ecm and harness.
It does suck holly isn’t going to try and make holly work with a 6L tranny.

agreed 100%.
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Old Jan 16, 2021 | 03:06 AM
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Originally Posted by SE-R Spec
Update on this?

no update unfortunately, my friend ended up sticking with a factory pcm and stand alone harness. So now I get to deal with the BCM and the starting circuit as well as the fuel pump circuit.
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Old Jan 17, 2021 | 03:28 PM
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Originally Posted by Toddoky
I’m sure that most of you guys are aware that development of this kind of stuff takes a lot of time, effort and financial resources to bring about and comes in incremental steps. Holley is well connected to the user base of its EFI products and is aware that users are wanting to use these later model transmissions in LS and LT swaps. I unfortunately can’t provide any specific information about development work that may, or may not be taking place relative to this as it is against company policy to do so.
Ok.
They could do what they did with the first oil pan and a variety of other swap items, buy what someone else has already made (in this case the controller Zero Gravity sells), rebrand it and mark it up. Then eventually just integrate it into a terminator and sell tons of them.
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Old Jan 17, 2021 | 04:34 PM
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Originally Posted by chuckd71
Ok.
They could do what they did with the first oil pan and a variety of other swap items, buy what someone else has already made (in this case the controller Zero Gravity sells), rebrand it and mark it up. Then eventually just integrate it into a terminator and sell tons of them.
Maybe what you are suggesting has already been considered and evaluated and didn’t pan out for one reason or another (financially or technically). My point is that it should not automatically be assumed that Holley is not doing anything in regards to further transmission development just because there’s been nothing released in terms of new products to date.
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Old Jan 19, 2021 | 09:11 AM
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Toddoky,
We realize stuff takes time and money. I was happy to see they tackled the GenV LT. A 4L80e will still haaul a LT1/LT4 around pretty good
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