speedo gauge

AZN MK3

AZN MK3

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Feb 12, 2006
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ok i was driving along and all at 45... and well i was wondering since i just FINALLY GOT THE 1J on the road, and everyone was passing me i go like 60 and im like right along with traffic.. now i know i cant be 60 on a 45. so does everyone with a 1j have this problem??? and is it fixable??
 
AZN MK3

AZN MK3

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BorHor;905891 said:
What diff are you running? I think because of the gearing your speedo is off.
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CRAP! what do you mean diff? cuz i bought it from the dealership (cuz my dumbass thru the little cable that connects to the longer one away along with my tranny.) and i even asked ppl here on the forums if there was a difference... and i stuck with the turbo one, and my car was originally auto..
 
BorHor

BorHor

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Jan 10, 2006
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Well there we go. You have a 4.3 diff. So it will read slower then you are really going. If you want to be closer to correct get a diff from a trubo.
 
AZN MK3

AZN MK3

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BorHor;905918 said:
Well there we go. You have a 4.3 diff. So it will read slower then you are really going. If you want to be closer to correct get a diff from a trubo.
Click to expand...

oh ok... damn... so would that have something to do also with the tach?? cuz i know im kinda reading hi also when im just cruising on fifth.. or maybe i just got a heavy foot... hehehhe...
 
supra1008

supra1008

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The tach has nothing to do with your diff. The tach reads the RPM of the engine not the diff.
Second how did you get your tach to work? Mine isn't working... and neither is my oil pressure and water temp gauge.

AZN MK3;905921 said:
oh ok... damn... so would that have something to do also with the tach?? cuz i know im kinda reading hi also when im just cruising on fifth.. or maybe i just got a heavy foot... hehehhe...
Click to expand...
 
H

HommerSimpson

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AZN MK3;905901 said:
CRAP! what do you mean diff? cuz i bought it from the dealership (cuz my dumbass thru the little cable that connects to the longer one away along with my tranny.) and i even asked ppl here on the forums if there was a difference... and i stuck with the turbo one, and my car was originally auto..
Click to expand...


take it to an speedometer shop... or do what i did when i droped a 355 chevy in my 91 dodge ram van.. Junk yard and got inline cable reduction box..
http://albums.photo.epson.com/j/ViewPhoto?u=4378087&a=32137847&p=74268684
 
tlo86

tlo86

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Jul 24, 2005
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thats a very colorful engine..

can't you use a 1jz tach and rpm will work fine?

when i had my harness done dr tweak wired in a converter digital->analog nothing special or new
 
OneJSupra

OneJSupra

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Feb 9, 2007
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I have a 4.3 diff and my tach is working and so is my speedo gauge, at 70mph crusing speed my tach reads exactly 3k rpm. Never cared whether it's accurate or not as long as no speeding tickets.
 
Jayhall

Jayhall

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May 7, 2005
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my speedo cable broke and i never fixed it. No tickets (well, for speeding) yet. I didnt really think that the speedo would be off by that much with the diff swap. Heres something to ponder, if you replace your turbo speedo with that of an N/A, would that correct the speedo being off?? Or is there something in the tranny that would have to be changed
 
AZN MK3

AZN MK3

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supra1008;906365 said:
The tach has nothing to do with your diff. The tach reads the RPM of the engine not the diff.
Second how did you get your tach to work? Mine isn't working... and neither is my oil pressure and water temp gauge.
Click to expand...

i got a tach from a turbo'd supra...
 
AZN MK3

AZN MK3

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tlo86;906395 said:
thats a very colorful engine..

can't you use a 1jz tach and rpm will work fine?

when i had my harness done dr tweak wired in a converter digital->analog nothing special or new
Click to expand...

yea i think... ppl on sm can vouch for that i think... but thats if you can get a hold of one...
 
BorHor

BorHor

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Jan 10, 2006
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Nope. They are calibrated the same. So it will read the speed. If you are talking about just swaping the numbers in the back I have no clue.
 
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