Tachometer Conversion

[DrifterProdigy85]

I know theres a ton of these threads going around but i just wanna make one to be totally clear if this idea works with our tachs. I found this webpage showing how they convert a 4 cylinder T Bird tach to work on a V8 or V6. Its showing that the 4 cyl tach comes with a 100k ohm. To read accurate to a V6 you use a 75k ohm or a 50k ohm for a v8. Does the S13 and S14 tachs have the same ohm setup?

http://www.coolcats.net/tech/a....html

[DrifterProdigy85]

Doesnt anyone here know the proper way to convert the tach? I know Carl H does but he wont respond to my email.

[rb25det250sx]

well i didnt do anyone that..i just took the tach out, and adjusted the screw looking thing on the back of the tach. i reads perfect with my autometer tach.

[DrifterProdigy85]

Ill try that and see what happens. There should be another way to do it though.

[rb25det250sx]

yeah i read somewhere were you have to put a 10k 12v resistor to fix the tach for a inline6/v6.

[DrifterProdigy85]

You remember where you read that at?

[rb25det250sx]

search, s13 tachs with rb25 swap or something like that.

but i got a question. what size rim, and offset is best for the rear or the s13. whats the biggest i can get?

[DrifterProdigy85]

I run a 15x9 12mm offset with a 275/50 tire and i need a 50mm fender. Heres a before and after shot to get an idea how they fit.

[Cjmartz2k]

The rotation direction is backwards on the Mickey T's.

[DrifterProdigy85]

Thats the direction it says on the tires.

[rb25det250sx]

damn... but the rotation is right..

[DrifterProdigy85]

Thats actually my SR 240. My RB 240 is a stock looking S14.

[sleepersilvia92]

what wire did you hook the tach signal to for it to read the aftermarket tach??

[CDub7]

i have the same prblems in my rb25 240 i saw someone do this but i do not know where to buy it. . .

http://memimage.cardomain.com/...3.jpg

http://memimage.cardomain.com/...2.jpg

http://memimage.cardomain.com/...1.jpg