I have another crazy question / electronic

[Corbusa]

For the Hayabusa's they make an aftermarket setup that tell you what gear your in.
Would it work on the zr? I'm just curious . Does the vette have something in the ecm that tell's what gear its in? heres a lnk on the aftermarket part
http://boostbysmith.com/giprods.html

[XfireZ51]

How about looking at the shifter?

[VetteMed]

Originally Posted by Corbusa

For the Hayabusa's they make an aftermarket setup that tell you what gear your in.
Would it work on the zr? I'm just curious . Does the vette have something in the ecm that tell's what gear its in? heres a lnk on the aftermarket part
http://boostbysmith.com/giprods.html

There is no sensor in the ZF transmission to indicate what gear is selected. Therefore, the ECM has no direct way of knowing what gear is selected. I suppose it could be easily determined in a calculation based on known rear axle ratio, engine speed input, and VSS input, but I'm ill-equipped to answer as to whether or not that's something that the ECM is already equipped to calculate or output into anything meaningful.

I suppose if someone were to be particularly interested in the idea, some sort of sensor could be adapted to the shifter assembly, to trigger an indicator.

Seems to me to be more trouble than it's worth, in any event. After putting some miles on the car it's usually pretty obvious which gear it's in.

[PhillipsLT5]

The sensor is you
1st & 2nd you need to push shifter to left(spring loaded)
3rd & 4th forward, backward no spring loaded
5th & 6th again spring loaded to right

[Corbusa]

yea , this is what I thought I'd hear I was placing the gear indicator in the same category as a shift lite. Either look at the tach, listen to the engine or have a shift lite. Just another option/ add on....

[XfireZ51]

Originally Posted by Corbusa

yea , this is what I thought I'd hear I was placing the gear indicator in the same category as a shift lite. Either look at the tach, listen to the engine or have a shift lite. Just another option/ add on....

Couldn't help myself. However, I wouldn't equate a shift light with a gear indicator. Depending on electronics, lag on tach can be significant.

[mike100]

My VW (recently sold to buy something more entertaining) could calculate the gear and would display it about 1/2 sec after you let the clutch out as it did the rpm vs vehicle speed calcs.

[VetteVet]

The ECM does calculate and store a variable named "NV Ratio". It uses this value to make decisions related to CAGS functionality. It would be possible to add code that could calculate what gear the car is in and either output it in the datastream or light indicators via unused ECM discrete outputs. Personally, I don't see a need for it, but it could be done.

Jep

[XfireZ51]

Originally Posted by VetteVet

The ECM does calculate and store a variable named "NV Ratio". It uses this value to make decisions related to CAGS functionality. It would be possible to add code that could calculate what gear the car is in and either output it in the datastream or light indicators via unused ECM discrete outputs. Personally, I don't see a need for it, but it could be done.

Jep

Jep,

Actually, the EBL ECM uses NV ratio to modify WOT timing based on which gear.
You'd like more advance in lower gears due to time to RPM.
So less advance or lower slope in 3rd and 4th gears.

[VetteVet]

Originally Posted by XfireZ51

Jep,

Actually, the EBL ECM uses NV ratio to modify WOT timing based on which gear.
You'd like more advance in lower gears due to time to RPM.
So less advance or lower slope in 3rd and 4th gears.

Dominic,

Thanks for the info. I haven't played around with the EBL setup very much.

I'll take note of that. Maybe the ZR-1 code can be modified to add that functionality.


Jep