LSx into old Corvette

[00fxd]

I am in the planning stages of installing a '01 or later LSx into my '65 Corvette. I am going to stay with my Muncie. What can I do for a Vss? I have a speedo cable driven 2 wave now for my TBI. Is there something like that available for later stuff?

[WS6]

Dakota digital makes a speedo calibrater device thingy(as you can see I don't know the actual name) that may work with your current sender.

Autometer offers a Hall Affect unit that puts out 16 pulses per revolution so as to work with their gauges. I believe GM also uses 16 PPR on their senders. Meaning you may be able to use that to signal the ECM.

I can't recall but I do not think you need a VSS signal if you are not going to use an electric auto. You will need a 168 tooth bell housing though so the starter will fit.

[00fxd]

Thanks Trey, I'll bet one of those would work
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...0&autoview=sku
If they provide the correct pulses for the speedo I guess they would provide the correct pulses for the pcm

[WS6]

I would think so as well. I can't verify what the PCM needs though. I want to say it is 16PPR but I do not know for sure. I bet if you hop over to the conversions section on LS1tech someone there can tell you for sure.

[Ron S]

If the pcm has a 6 speed tune it has the 17 count reluctor ring,its a 40 count ring if it has an automatic tune in it.To be honest I can't really tell the difference in how they run with the vss hooked up or not.They say it effects economy,but my Hemi in my Cuda runs off an LSX PCM and sensor with no vss and it went 12.4 and got 20mpg http://mysite.verizon.net/ls6ron/. Those summit units are only 2 or 4 pulse and will not work on an lsx,they are for the early tbi and tpi setups

[00fxd]

57, interesting. Why did you chose the GM pcm to control your Chys engine?
Talking to a ecm programer yesterday, he said that with a manual trans all the pcm would need to see was a signal to indicate the car was rolling, with an automatic the signal would have to be dead on. He suggested that an 8k or a 16k signal would be fine. I wonder if my existing 2wave from the tbi currently on the car would do the trick...
I have heard that the vss will keep an engine from stalling when you come to a stop.

[Ron S]

I chose the GM pcm because it works,GM has alot more money to spend on R&D then any aftermarket engine management company does and the Chrysler stuff is a joke.As far as the vss,I've researched that to the enth degree, 17pulse manual 40 automatic.The tuner can change the PCM depending on what tune he wants to start with.The lack of a vss signal caused me no drivability issues,but I'm sure GM put it in there for a reason.I know of 20 cars that have turbo 400's behind them and have been in the 10's one even in the 9's with no vss and no real ill effects.I'm sure it using the vss is the ideal set up but not nessesary

[nitrovette]

i dont have mine hooked up in my vette and dont notice any difference.