BackHouseZ

Hey i pulled this 130mph gage out of a 79 zx in the bone yard. I have a 1980 280zx as you can see and i was wondering is there an easy way to install.. Does the needle come off or do i have to put the odometer in if so is there a way to reset it.

NismoPick

You get to remove the gauge cluster, tear into it, remove the old speedo unit, and install the 130 unit. Lots of fun. There's not really any way to recalibrate it on your own. It's set for 3.7 gears.

Niku-Sama

thats because 3.7 gears ROCK!

whats that jim-jam next to the guage?

BackHouseZ

ahh its like a heater control valve i think, my heater does not work it was leaking and i dont think it ever worked since i've had it but someone told me it could be my core was bad or that think you see there. Antifreeze in my passenger side floor

lww

All 280ZX speedo's are set to the same ratio. It's the speedo cog in the transmission that is calibrated to the differential gearing depending on how many teeth the cog has.

You're local mechanic should know if there's someone in your area that can calibrate your speedo and reset the odometer to your correct mileage.

It's a pretty easy conversion that is done all the time on these cars. Here's a pic of my 210mph speedo:

Sweets

I want you to find me another speedo like yours, lww. I WANT

NismoPick

Ah yeah! Tranny cog.... I forgot all about that. Doh!

Sweets

The cogs are color coded. I forget which one is for what though.

Niku-Sama

is changing the cog a take the tranmission apart affair or can you get to it from the outside

NismoPick

Outside. It's where the speedo cable hooks on to the tranny. 10mm bolt & you can pull out the cog.

snwbrderphat540

210 mph lol. you cheater n00b. thats SUPPOSED to say KMH

NismoPick

Here's the link about speedo cogs:

http://www.geocities.com/zgarage2001/engine.html






YELLOW is the 16 tooth for the 3.36
BLACK is the 17 tooth for the 3.54
BLUE is the 18 tooth for the 3.70
WHITE is the 19 tooth for the 3.90
RED is the 20 tooth for the 4.11
PURPLE is the 21 tooth for the 4.38

Niku-Sama

ahh that link may have given me more info to check my cold idle problem