Tach fix for the RB25DET
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frosted flakes
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PROJECTRB240SX
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- Car: 1972 DATSUN 240Z W/ SR20DET
For the 300zx sensor you may also try
http://www.z1motorsports.com
They carry quite a range of used parts, so I'd give them an email or call them and see if they'd have a sensor.
http://www.z1motorsports.com
They carry quite a range of used parts, so I'd give them an email or call them and see if they'd have a sensor.
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rbsileighty
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- Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT
frosted flakes wrote:i am playing with a 180sx gauge cluster to hook up to my rb20det to read right and to make the 180KMH--->180MPH and since the tach reads to 9K its much better for our engines. There are variable resistors for each circuit i have opened them up I will get pics soon....
I am very interested in seeing these pics!
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frosted flakes
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frosted flakes
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no, a pull up resistor is from positive power.
+12v-------------[10k resistor] tach signal--------------^----------{TACH}
the resistor goes between +12v and the tach signal line. you do not interrupt the tach signal line, you just connect the other end of the resistor to the line before the tach.
what your going to do is place positive power on one end of the resistor, and connect the other end of the resistor to the tach signal line, creating a "3 way intersection"
+12v-------------[10k resistor] tach signal--------------^----------{TACH}
the resistor goes between +12v and the tach signal line. you do not interrupt the tach signal line, you just connect the other end of the resistor to the line before the tach.
what your going to do is place positive power on one end of the resistor, and connect the other end of the resistor to the tach signal line, creating a "3 way intersection"
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frosted flakes
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Ok, my mistake. It was already "reading" without any pullup resistor. I put the resistor on because I thought you meant it would make it read correctly (or closer to correctly) for a 6 cylinder.
So, in my experience, the tach "reads" fine on the S14 with RB20, but it reads high. I do not know how to accurately calibrate it.
So, in my experience, the tach "reads" fine on the S14 with RB20, but it reads high. I do not know how to accurately calibrate it.
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frosted flakes
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S13Sil-line
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Re: Tach fix for the RB25DET (NISMO_RB25)
Nismo, do you know what car your tach came out of? I went to a local junk yard here and found a couple out of some Maxima's which are VG30E's. The Stanza's are the KA24. If you can find out for me I would really appreciate it. Also is the only wire you spliced the one for the tach signal? I used the tach from the Maxima and it reads at about 1,000 rpm but then when I rev the motor the tach stays at the same place and does not climb at all.
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S13Sil-line
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Re: (S13Sil-line)
yes,
we have the same problem.. and I can't seem to figure it out .. either,,
1990 240SX coupe. my wire was done by.. mckinney.. reads zero..mphzero..rpm..
i have the R33 tach. will this plug in,,..??
we have the same problem.. and I can't seem to figure it out .. either,,
1990 240SX coupe. my wire was done by.. mckinney.. reads zero..mphzero..rpm..
i have the R33 tach. will this plug in,,..??
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S13Sil-line
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