ls1 in a 69 camaro whats vss?
05-07-2010, 06:54 AM
#1
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ls1 in a 69 camaro whats vss? hey guys i am doin a ls1 2000 camaro motor into a 69 camaro with a tko600. i was told i need a vss for my tko600 for the wiring.. why is this is it really needed? an if so why is this. an if u all have does this on a tko500 are a tko600 plz let know know what u all have done are used.
thanks jason
thanks jason
05-07-2010, 08:27 AM
#2
I've got an LS with a Richmond 6 speed in my 68 vette. The Richmond runs only a mechanical speedo output feeding my mechanical speedo. Without any VSS the engine would die when depressing the clutch for a prolonged time while slowing from highway speed in high gear and coming to a stop. Apparently a very common effect of no VSS.
I added a Dakota Digital 8k ppm pass thru VSS, allowing me to keep my mechanical speedo.
Another swap on corvette forum has a TKO with the same problem. Dakota Digital has short adapter cables made for space limited applications that will connect the TKO ford output to the GM pass thru VSS. Then you can use your mechanical GM speedo cable and speedometer.
You have to call them to get the adapter cable. Just explain what you're trying to do. Total cost is about $50.
I added a Dakota Digital 8k ppm pass thru VSS, allowing me to keep my mechanical speedo.
Another swap on corvette forum has a TKO with the same problem. Dakota Digital has short adapter cables made for space limited applications that will connect the TKO ford output to the GM pass thru VSS. Then you can use your mechanical GM speedo cable and speedometer.
You have to call them to get the adapter cable. Just explain what you're trying to do. Total cost is about $50.
05-07-2010, 09:36 AM
#3
You don't really need the VSS Signal.. but it can be used and needed for driving a Digital Speedo (or ther Electrical speedo's) or if you have a Electrically controlled Automatic Trans. A Cable-X box can also be used to drive a mechanical Speedo from a VSS output. But Like Gary said..If you can order it with one or the other.. or both it would be helpful
But for a Manual car and trans, the PCM doesn't really need the VSS input. I've been running without it for almost 5 years.. I've not had the problems that Gary stated can happen (could be my tune ?) on slow down or depressing my Clutch.
But for a Manual car and trans, the PCM doesn't really need the VSS input. I've been running without it for almost 5 years.. I've not had the problems that Gary stated can happen (could be my tune ?) on slow down or depressing my Clutch.
05-09-2010, 06:26 AM
#4
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I've got an LS with a Richmond 6 speed in my 68 vette. The Richmond runs only a mechanical speedo output feeding my mechanical speedo. Without any VSS the engine would die when depressing the clutch for a prolonged time while slowing from highway speed in high gear and coming to a stop. Apparently a very common effect of no VSS.
I added a Dakota Digital 8k ppm pass thru VSS, allowing me to keep my mechanical speedo.
Another swap on corvette forum has a TKO with the same problem. Dakota Digital has short adapter cables made for space limited applications that will connect the TKO ford output to the GM pass thru VSS. Then you can use your mechanical GM speedo cable and speedometer.
You have to call them to get the adapter cable. Just explain what you're trying to do. Total cost is about $50.
I added a Dakota Digital 8k ppm pass thru VSS, allowing me to keep my mechanical speedo.
Another swap on corvette forum has a TKO with the same problem. Dakota Digital has short adapter cables made for space limited applications that will connect the TKO ford output to the GM pass thru VSS. Then you can use your mechanical GM speedo cable and speedometer.
You have to call them to get the adapter cable. Just explain what you're trying to do. Total cost is about $50.
05-09-2010, 08:28 AM
#5
i emailed dakota digital an tim wrote me that the vss pass thur wont work for the ls1? but alot of people on here an other forms say they do? i do want to keep my mech speed-0, so does the sen-1-4160 pass thur vss just sending the ecm a code saying hey we slowing down dont kill the motor?
05-09-2010, 08:34 AM
#6
The DD VSS sends 8ppm signal. The computer is used to seeing a 100k ppm, so the computer will read very low speeds without retuning. However, that was enough to cure my stalling issues. It would not stall very often, but once I found the correct conditions, I could reproduce the stall easily. Btw, there's another member on corvetteforum with an LS/TKO that has the same issue and is adding the DD pass thru w/ Ford short adapter cable.
If you want to get a correct speed reading to the computer for an electronic speedo or DBW cruise control to work, you'll need HP Tuners. Apparently, 8ppm is outside the range of EFI lives tuning capability. Check out the last few pages of corvetteforums LS conversion sticky for more info.
If you want to get a correct speed reading to the computer for an electronic speedo or DBW cruise control to work, you'll need HP Tuners. Apparently, 8ppm is outside the range of EFI lives tuning capability. Check out the last few pages of corvetteforums LS conversion sticky for more info.
05-09-2010, 09:11 AM
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The DD VSS sends 8ppm signal. The computer is used to seeing a 100k ppm, so the computer will read very low speeds without retuning. However, that was enough to cure my stalling issues. It would not stall very often, but once I found the correct conditions, I could reproduce the stall easily. Btw, there's another member on corvetteforum with an LS/TKO that has the same issue and is adding the DD pass thru w/ Ford short adapter cable.
If you want to get a correct speed reading to the computer for an electronic speedo or DBW cruise control to work, you'll need HP Tuners. Apparently, 8ppm is outside the range of EFI lives tuning capability. Check out the last few pages of corvetteforums LS conversion sticky for more info.
If you want to get a correct speed reading to the computer for an electronic speedo or DBW cruise control to work, you'll need HP Tuners. Apparently, 8ppm is outside the range of EFI lives tuning capability. Check out the last few pages of corvetteforums LS conversion sticky for more info.
i dont care if it will not send the rite ppm to the ecm i just want the motor to run an not stall out!! i plan on keeping my stock gauges an mech speed-0.
thanks for any info
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05-09-2010, 10:40 PM
#8
The DD VSS sends 8ppm signal. The computer is used to seeing a 100k ppm, so the computer will read very low speeds without retuning. However, that was enough to cure my stalling issues. It would not stall very often, but once I found the correct conditions, I could reproduce the stall easily. Btw, there's another member on corvetteforum with an LS/TKO that has the same issue and is adding the DD pass thru w/ Ford short adapter cable.
If you want to get a correct speed reading to the computer for an electronic speedo or DBW cruise control to work, you'll need HP Tuners. Apparently, 8ppm is outside the range of EFI lives tuning capability. Check out the last few pages of corvetteforums LS conversion sticky for more info.
If you want to get a correct speed reading to the computer for an electronic speedo or DBW cruise control to work, you'll need HP Tuners. Apparently, 8ppm is outside the range of EFI lives tuning capability. Check out the last few pages of corvetteforums LS conversion sticky for more info.
I looked it up in EFI Live, since I originally had looked in TunerCat / Jet, the EFI Live limits are 100 through 157478, so you could set it for 8000 in EFI live
Last edited by poconojoe; 05-09-2010 at 10:49 PM.
05-10-2010, 01:30 AM
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It puts out 8 pulses per revolution, not per mile, I know there were some 60 pulse per revolution ones out there. The normal output speed of a speedometer connection is 1000 revolutions per mile, so with an 8 pulse per revolution sensor you're get 8000 pulse per mile. the setting range for this input in the tune is listed being 0 to 255996, in incriments of 4, so you could set it for 8000 pulses per mile
I looked it up in EFI Live, since I originally had looked in TunerCat / Jet, the EFI Live limits are 100 through 157478, so you could set it for 8000 in EFI live
I looked it up in EFI Live, since I originally had looked in TunerCat / Jet, the EFI Live limits are 100 through 157478, so you could set it for 8000 in EFI live
05-10-2010, 02:39 AM
#10
Oops, correction...SEN-01-4160 8k ppm....
I dont do my own tuning, but I've been told 2 things....
From Jesse at wait4 me who did the tune "If you go that low on the pulses per mile, it will lock up the ecm and it will never work again due to a cpu overrun condition. That is why we lock the values in efilive tuning software so people dont ruin them."
From another forum member "I use HP tuners and Jesse uses EFIlive. For whatever reason EFIlive won't let you change the pulse per mile number down to 8000. If you find someone with HP tuners he can change it for you."
Either way, it solved my stalling issue without a retune. I'm using my mechanical speedo too. I only need a retune on the VSS to get mt DBW cruise control to work.
I dont do my own tuning, but I've been told 2 things....
From Jesse at wait4 me who did the tune "If you go that low on the pulses per mile, it will lock up the ecm and it will never work again due to a cpu overrun condition. That is why we lock the values in efilive tuning software so people dont ruin them."
From another forum member "I use HP tuners and Jesse uses EFIlive. For whatever reason EFIlive won't let you change the pulse per mile number down to 8000. If you find someone with HP tuners he can change it for you."
Either way, it solved my stalling issue without a retune. I'm using my mechanical speedo too. I only need a retune on the VSS to get mt DBW cruise control to work.
05-11-2010, 02:59 PM
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Oops, correction...SEN-01-4160 8k ppm....
I dont do my own tuning, but I've been told 2 things....
From Jesse at wait4 me who did the tune "If you go that low on the pulses per mile, it will lock up the ecm and it will never work again due to a cpu overrun condition. That is why we lock the values in efilive tuning software so people dont ruin them."
From another forum member "I use HP tuners and Jesse uses EFIlive. For whatever reason EFIlive won't let you change the pulse per mile number down to 8000. If you find someone with HP tuners he can change it for you."
Either way, it solved my stalling issue without a retune. I'm using my mechanical speedo too. I only need a retune on the VSS to get mt DBW cruise control to work.
I dont do my own tuning, but I've been told 2 things....
From Jesse at wait4 me who did the tune "If you go that low on the pulses per mile, it will lock up the ecm and it will never work again due to a cpu overrun condition. That is why we lock the values in efilive tuning software so people dont ruin them."
From another forum member "I use HP tuners and Jesse uses EFIlive. For whatever reason EFIlive won't let you change the pulse per mile number down to 8000. If you find someone with HP tuners he can change it for you."
Either way, it solved my stalling issue without a retune. I'm using my mechanical speedo too. I only need a retune on the VSS to get mt DBW cruise control to work.
