Instrument cluster swap for 1980 Rx-7
 

To bad I cant find the post I read a couple of years ago on this :wallbash:

I know there is a good cluster from a later model 7 that will work on my 80 model
I just don't remember which one was supposed to be the "good" instrument cluster
any help will be appreciated as I am resurrecting the Beast 1nce more!!! doin the engine swap this weekend and I really want the good ...higher speed speedometer cluster to go in this car!! I know I might have to mod a little...Not Scared!!

Thnx in advance !!
StumpDrummer

I think you are looking for an 83.5-85 cluster.

What you want a 120mph speedo? I got a 79 cluster ill sell ya if that's what you need.

I did a 85 dash into an 83. Pretty easy straight forward swap but I work on cars professionally and enjoy wiring.

You have to use a 79 cluster, otherwise the speed will read incorrectly. Different gearing.

79 is a direct fit in an 80 dash. Got one in my 80.

The FB clusters are a different shape.

Didnt know that...now i know :p

Thought they all are 1056 revolutions per mile.

IIRC, SA speedos are 1024 rev/mi. It's marked on the speedo face, but you have to disassemble the cluster to see it as the front mask covers it.

I have a photo at home I can check later for you.

Jees Thnx for the post !!! will try to find the 79 I guess ...I think it would be easier to just do a direct swap....
This car came from Canada with the kilo setup then I replace with a mph cluster then something shorted on the cluster killin the tach ...so heres the next question!!

what if anything will I have to change for the mph cluster to work correctly been years since I've had this car runnin!?

Hey is there anyway to swap out the 130 speedo gauge for a 150 out of a 83 cluster?...now that would be cool ...I could also copy all the facings for a reversed black on white background for each gauge!

I was close: 1025 rev/mile on an SA speedo.

Here's what it looks like removed from the cluster.

anyway to swap the gearing that you know of ? or do you think its to big of a can of worms to open?

You used to be able to get transmission-end-of-the cable "driven gears" in various ratios. No idea if they are still available.

There's no "gear" driving the speedo itself - - magnetic drag disk mechanism (aka Eddy Disk). Gears do drive the odometer, but any change of cable speed is done at the tranny end.

Thnx for the info DivinDriver gonna look into the cable drive gears and see what I can come up with gonna post some pics of the beast when Its runnin!!!