280ZX (S130) Forums Dedicated to 79-83 ZCars

speedo mod

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Old May 11, 2005 | 11:20 AM
  #1  
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From: squwamton
speedo mod

I REALLY though that this was going to be alot harder mod but.... it wasnt . it took about two hours this moring to pull it apart and put it back .. droping the the streeing colum was a little scary frist time jitters but once it was pulled apart its not that hard to fig out .. iam stoked i didnt think that i would be able to keep the ecu read out but with a little swaping from one cluster to the other and shes GOLDEN ..
Old May 11, 2005 | 11:36 AM
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So this has always baffled me..., you don't need to change out the tranny sending gear when you do that?? Just the speedo and that's it, eh?? That's AWESOME!!
Old May 11, 2005 | 11:51 AM
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Most sweetness. I want to do the 130 swap, so I can make some custom gauge faces that read to 260kmh! Hehe ...
Old May 11, 2005 | 12:25 PM
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Yep just a simple swap. I did it both in my '81 and '82 280zx's. Verry universal, then I set the miles to what the old gauges said. So they are accurate! No changing anything. Just swap them out one for the other. Works great, not a hitch!
Old May 11, 2005 | 12:27 PM
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Just get a 210 kph speedometer from Canada and have it re-calibrated to mph.
Old May 11, 2005 | 01:15 PM
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yep yep yep the hole thing comes apart eazy peaze.. you can get just the gauge from ebay for like $70.00 bill ... i was lucky eff to get the hole piece from a 79 car a the a zdriver member had it for sale. so i took both of them apart and swaped them up up the hardest part was getting the speedo cable hooked back on to the back of the cluster but it got alot eazyer after i found out that the cable comes free at the fire wall
Old May 11, 2005 | 01:59 PM
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That's Hot!
You're getting all kinds of work done on your car. maybe I need to employ you to work on my Z while I'm at work!
Old May 11, 2005 | 04:16 PM
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That is nice.. I need one that goes to 200MPH and it will be used....
Old May 11, 2005 | 05:07 PM
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Yeah, I thought it was going to be hard too, but it's very easy. :P Got tired of pinning my speedo to 85mph. Now I can pin it to 130mph. :P
Old May 11, 2005 | 09:50 PM
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Originally Posted by WildmaN
Yep just a simple swap. I did it both in my '81 and '82 280zx's. Verry universal, then I set the miles to what the old gauges said. So they are accurate! No changing anything. Just swap them out one for the other. Works great, not a hitch!

ya i sould have messed with it more i didnt reset my OD to what it was. didnt want to break the new speedo mabe i will pull she apart and try to make my OD right
Old May 11, 2005 | 10:49 PM
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Just remove it and stick a screwdriver tip in the back and spin it for a few hours. It'll roll over to zero and then bring it back to what you want it. That's the safe way to do it. Don't open it up or you might break the odometer.
Old May 11, 2005 | 11:06 PM
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I just found an old picture of mine...

http://www.kamikazeracing.org/dl/210speedo.jpg

If you get one from a Canadian ZX from 1980 to 1983 you'll get a 6 digit OD too.

Last edited by lww; May 11, 2005 at 11:13 PM.
Old May 11, 2005 | 11:53 PM
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Originally Posted by BleachZee
Just remove it and stick a screwdriver tip in the back and spin it for a few hours. It'll roll over to zero and then bring it back to what you want it. That's the safe way to do it. Don't open it up or you might break the odometer.

Dam a few hours **** maybe if i hooked a drill to it it would take 30 mins
J/K


IWW THATS SICK WISH I WOULD HAVE KNOWEN THAT SOONER ....

Last edited by 81 Black L28E; May 11, 2005 at 11:55 PM.
Old May 12, 2005 | 05:22 AM
  #14  
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I need one of those LLW
Old May 12, 2005 | 08:13 AM
  #15  
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Ya right, like you're ever going to go over 140mph! It sure looks sweet though.

I'm sticking with my 85 because I want to get some really cool gauges for my car and they only come in 85mph. Besides, I drive slow.
Old May 12, 2005 | 08:33 AM
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Originally Posted by BleachZee
Ya right, like you're ever going to go over 140mph! It sure looks sweet though.

I'm sticking with my 85 because I want to get some really cool gauges for my car and they only come in 85mph. Besides, I drive slow.
Befor I had my tranny rebuilt and I actually had a fifth gear I was still pulling away from a BMW M3 at 140.. His was governed at 140 I still had 2300 RPM to go but It was taking a WHILE TO GET THERE.
Old May 12, 2005 | 08:49 AM
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Originally Posted by BleachZee
I want to get some really cool gauges for my car and they only come in 85mph.
I've never seen an aftermarket speedometer that only came in 85mph...

How cool is a 'Stock' 210 mph speedo?

My dad just bought a brand new 2005 Pontiac GTO and was bragging about how it had 400hp/400ft.lbs torque and the speedo went to 200 mph.

He was very disappointed when I told him my 23 year old car had 410hp/420ft.lbs torque and showed him my speedo that goes to 210mph!

Of course, I paid more for mine than he did and his comes with a warranty...

Last edited by lww; Jul 26, 2005 at 05:15 PM.
Old May 12, 2005 | 09:12 AM
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Originally Posted by s/cL3.0
Befor I had my tranny rebuilt and I actually had a fifth gear I was still pulling away from a BMW M3 at 140..
You already told me you don't actually have a supercharged engine, so you're running a non-turbo L28 with a stock 5-speed, 3.54 rear and you can go that fast???

I know LWW could go that fast if he wanted to, but nobody else on here has that kind of engine.

The gauge is not exactly aftermarket. It is an aftermarket gauge made just for the 280ZX. This was going to be a surprise. I'm sure Skully will look this up, buy it, and install it before me and post pictures. Then I'll look like a copycat.

It is white face with REVERSE glow, not just white stickers that glow all over if you sand the backing off the stock gauge.

Of course, if they made it for the '79 280ZX you know I'd be all over doing that swap and getting the reverse glow gauges. I even had the guage set but sold it because I like the reverse so much and my car rarely see's anything past 70.
Attached Thumbnails speedo mod-280zxgauge.jpg  
Old May 12, 2005 | 09:33 AM
  #19  
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Okay I might have been off seeing is how my speedo goes to 85MPH, The M3 speedo {digital} said 140 if you go to http://www.geocities.com/z_design_studio/ put in 4800 as the redline RPM the 3.545 diff 81-83 factory tranny and tire size of 195x70x14 it will say 134MPH in fifth gear at that RPM but I was still pulling away. As far as my mods go 8.0:1 cr, intake, +1mm pistons, CFDF clutch, and 10lb. flywheel.
Old May 12, 2005 | 11:08 AM
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All speedos have error so that may have been why your friend's BMW read 140 while the actual speed was ~130. If there ever was a 100% accurate speedo, rally racers and the Silver State challenge racers in the bracket classes would be all over them. Either way, good kill though.
Old May 12, 2005 | 11:23 AM
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oh, ok. So 3.9 rear then?

Ya, my car runs out of power before it can get to that RPM in 5th. I've got 8.8:1, K&N, headers with exhaust. That's all. Not really much to talk about with the stock cam and stock compression.
I'm thinking my top speed was 125mph. If I was still accelerating it was probably 1mph every 5 seconds. Nothing to talk about though.
With a turbo, you should be able to reach 6,000 rpm in 5th I would think. 145-150mph maybe on a 3.7 rear

LWW probably has a 3.54 rear with a T5 so he can go about 170mph in that 400hp car

These cars really aren't made to go that fast. Do not try to turn while going over 120! Really you should have all new suspension parts, stiff springs, lowered, air dam and whale tale spoiler to keep you on the road.... I mean, track.
Old May 12, 2005 | 12:14 PM
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Originally Posted by BleachZee
oh, ok. So 3.9 rear then?

to keep you on the road.... I mean, track.



NO NO BLEACH YOU MEAN ROAD
Old May 12, 2005 | 12:53 PM
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Hey I had my rpm's doing 5300 in 5th gear. The first year I got my '81. I am pretty sure I was doing about 140mph or so. I know I was cooking. I was getting a rush, that is for sure!
Old May 12, 2005 | 01:00 PM
  #24  
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Originally Posted by WildmaN
Hey I had my rpm's doing 5300 in 5th gear. The first year I got my '81. I am pretty sure I was doing about 140mph or so. I know I was cooking. I was getting a rush, that is for sure!
ok, FINE! I guess my 2+2 is just too fat to go that fast!
Old May 12, 2005 | 01:11 PM
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Hey Bleach also, the '82 that I am currently restoring. Supposedly the guy I bought it from, which he destroyed it, and abused it. He claimed he got nailed doing 160mph! Because that is what the cop said that pulled him over! And of course the cop asked. "Do you know how fast you were going." And then the guy's reply. "Well my speedometer says 85mph." Because that is what it said. And then I realized that he snapped the inside of it. Because it didn't work at all. And the needle was busted clean off. He said that he had 3 or 4 grand in fines. And he had to go to school for a few months. Of course I don't know if it is actually truth. But it is a nice thought, to think maybe my Z broke the sound barrier! LOL!

And basically 2 + 2's are designed to carry more passengers. A good family sportscar! LOL!



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