Terminator X with T56? VSS? Reverse Lockout?
Speed signal matters for idle control, boost control, for logging. So yes...it is essential unless you want a very basic shitty system.
It'd be like saying coolant temp, air temp, throttle position etc are not essential. An engine can easily be made to run without those....but it'd be ****.
It'd be like saying coolant temp, air temp, throttle position etc are not essential. An engine can easily be made to run without those....but it'd be ****.
"description: selects the method shift occurrence will be recognized. if using a holley efi controlled electronic transmission, select “tcu input” and the gear change is automatically recognized. “rpm drop” uses a fall in rpm after a shift to determine a shift. “individual input” uses a +12v or ground input to determine a shift"
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
The Terminator definitely seems like great value for money, so saying shitty is probably a little OTT. And you can do lots of things ignoring important information...doesnt mean it's a good or sensible way to do it though when it's so easy to do it right
Launching!
Joined: Aug 2015
Posts: 206
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From: Duvall, WA
For the record, since I haven't seen it mentioned in this thread yet, the Terminator X and X Max ECUs do not support variable reluctance (sine wave) speed sensors on their four general-purpose inputs (I don't know whether they support such sensors on the transmission connector, but only the automatic transmission guys are going to be using that anyway). You need to use a Hall effect type speed sensor for that to work, or run a variable-reluctance sensor through some kind of circuit that converts it to look like a Hall effect sensor. You may also find that the speed sensor in the transmission is surprisingly "noisy" and will tend to falsely report vehicle speed when you are stopped and in neutral.
On my own setup, I am using an ABS wheel speed sensor running through a $16 SIRHC Labs converter board. I have found that this signal tends to be much cleaner than attempting to convert the transmission VSS to Hall effect (again, noise in neutral). So, if you want to use a speed sensor input to choose when to engage and disengage the reverse lockout, you may want to consider something like that.
On the output side, Terminator X/Max ECUs can only ground their outputs, not provide power to them. I don't know how much power the T56 reverse lockout coil draws, but you might want to use the ECU to ground a relay rather than trying to ground the reverse lockout coil directly through an ECU output.
As has been mentioned, Holley's own tech support is hit-or-miss at best. You really either need to post in the Holley EFI forums, or buy your rig from a dealer who will support you after the sale.
On my own setup, I am using an ABS wheel speed sensor running through a $16 SIRHC Labs converter board. I have found that this signal tends to be much cleaner than attempting to convert the transmission VSS to Hall effect (again, noise in neutral). So, if you want to use a speed sensor input to choose when to engage and disengage the reverse lockout, you may want to consider something like that.
On the output side, Terminator X/Max ECUs can only ground their outputs, not provide power to them. I don't know how much power the T56 reverse lockout coil draws, but you might want to use the ECU to ground a relay rather than trying to ground the reverse lockout coil directly through an ECU output.
As has been mentioned, Holley's own tech support is hit-or-miss at best. You really either need to post in the Holley EFI forums, or buy your rig from a dealer who will support you after the sale.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
No big deal converting from VR to a square wave. There are various adapters that can do it if you cant build something
There is no reason the stock VSS should be noisy.
And the solenoid draws very little current. I've had mine on a low current output for several years with no issue so I'd say 1A or less. Although never actually measured it.
There is no reason the stock VSS should be noisy.
And the solenoid draws very little current. I've had mine on a low current output for several years with no issue so I'd say 1A or less. Although never actually measured it.
Doing some research on putting a Terminator X in my car. 1996 Z28 with a junkyard 5.3L and a T56. I would like to use the speed sensor in the transmission and also retain the reverse lockout just in case.
I have contacted Holley about this and they have basically told me that I'm on my own. There is little info on how to wire this up online. I know you will have to use the I/O's to run it. Does anyone here have a setup like this and can point me in the right direction on how to achieve this? The goal is turbo in the future. Thanks for any help!!
I have contacted Holley about this and they have basically told me that I'm on my own. There is little info on how to wire this up online. I know you will have to use the I/O's to run it. Does anyone here have a setup like this and can point me in the right direction on how to achieve this? The goal is turbo in the future. Thanks for any help!!
Any updates on this? I'm wiring up my Terminator X now and am ready to start wiring up my t56. I plan on using one of my inputs for VSS and one output for the revers lockout. I checked out that link, but I don't believe that applies to me since they are describing the HP EFI, not X.
Any updates on this? I'm wiring up my Terminator X now and am ready to start wiring up my t56. I plan on using one of my inputs for VSS and one output for the revers lockout. I checked out that link, but I don't believe that applies to me since they are describing the HP EFI, not X.
