Speedometer help - rb25 + 6 cyl tach + 300zx diff = WAY OFF

Discuss the RB20, RB25 and RB26 series engines.
supermario680
Posts: 42
Joined: Sun Feb 18, 2007 7:11 pm
Car: 90 300zx NA 2+2 stage IV

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So my s13 has a rb25 with a 6 cylinder tach and a 300zx rear diff, with the new tach the RPMs are correct but the speedo is WAY WAY off... Anything I can do to fix this?


BoredEE
Posts: 10
Joined: Wed Jun 16, 2010 6:29 pm

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s14-speedometer-correction-with-z32-transmission-t472168.html

I've lost the link to a thread that tells which solder joint to connect to affect which % on the speedometer.

But I'm sure a few minutes of searching will turn it up.

Oh I see its for a s13, maybe the s13 has the same correction solder joints.

Otherwise you can always buy a dakota digital.

There are different speedometer pinions you can try on the speed sensor but I have no idea which one you'll need.

Maybe a 300zx TT pinion will work.

FYI:
http://pic20.picturetrail.com/VOL1569/9 ... 761118.jpg

supermario680
Posts: 42
Joined: Sun Feb 18, 2007 7:11 pm
Car: 90 300zx NA 2+2 stage IV

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Sweet thanks I'll check it out

nismoplsr
Posts: 406
Joined: Sun Oct 19, 2003 6:45 pm
Location: CT

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