i dont think hes swapping gauge faces. i hope not.

 

damnit, Im doing the same swap as this guy is doing next summer, so I guess im gonna have to find another cluster, and one in Kms an hour not miles..

 

That shouldn't be a problem..


Good. Just wanted to be sure.

 

Seriously, your dealing with two different types of transmissions that have slightly different gearing that make the speeds calibrated to the car. If you don't change them out it will be off but who knows by how much. If you want to do the math go for it.

 

I have my LS trans in there still. Maybe that was important info.

 

ive seen gsr clusters in ls's with ls motors and the clusters worked fine. i dont see how this is any different.

 

I hear you. But the speedo is electronically controlled and looks for a binary signal from the Vehicle Speed Sensor. It's essentially a Hall effect sensor that reads from a toothed wheel internal to the transmission, not unlike an ABS sensor.

Since the GSR trans is geared higher, the VSS will be sending out more pulses per second at a given road speed than an LS trans. That's why I'm concerned that the LS gauge cluster will either read significantly faster, or fail to read a signal at all.

I'm a conservative kind of guy when it comes to this stuff. If it only costs 50 or 60 bucks to have an accurate speedo and tach, I'd pay for a used GSR cluster.

My 2Ą. h:

 

True true. Check thread, I have an LS Trans. Does this change your recommendation? By what you say, I would have a problem ustilizing a GSR cluster. A more technical explanation like the one you gave me makes more sense to me than layman's terms. Don't hold back, slugger.

With everything I have read above, I need a more dense tach, not LS and not GSR. Seems like it needs new math to encompass the LS trans on a higher revving motor. Can I get hallelujah? So basically, I need to install a TV that plays porn 24/7 where my tach is and go for an Autometer Tach.

With that said, anyone know where I can get a tach that won't show off for the thieves?

 

:rofl:
google should find you some stuff

 

:chuckles: What ever rocks your party, eh? The cops might take a dim view of the TV being in plain sight.. h:

After you mentioned you've got an LS trans, I'm beginning to doubt my theoretical math. [I have a high degree of skepticism about math in general; this situation just elevated it and focused it.]

Furthermore, the Factory Shop Manual shows no distinction in VSS sensor rates between the DC2/DB8s [VTEC coupe & sedan] and the DC4/DB7s [Non-VTEC coupes and sedans]. So the speedo ought to be fine. :dunno:

Since the tachometer is a sub-component of the Gauge Assembly, it could be replaced, in theory, with a GSR tach assuming the printed circuit boards are identical.

Not wanting to spend more than is absolutely necessary, I'd try running the car with the stock LS cluster and see if the tacho is accurate.

A good way to do this is to take the car (fueled with premium gas of course) in 2nd gear, up to about 5500 rpm indicated and see if the VTEC lobes engage. VTEC system woes not withstanding, you can use the stock switchover point to gauge the accuracy of the LS tachometer.

If all is well, I'd try disassembling the gauge cluster to retrofit a GSR tachometer. That's about as low-profile as you can get.