RPM Wrong?
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Junior Member
Joined: Jul 2007
Posts: 50
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From: Cincinnati Ohio
Car: 88 GTA
Engine: 350 TPI
Transmission: T5
Axle/Gears: 10 bolt rear w/3.73 richmond gears
RPM Wrong?
While doing some datalogging I noticed that my rpm guage (Digital Dash) reads about 600 rpm higher than the Tuner Pro RT reading. Which should I trust?
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Joined: Mar 2003
Posts: 282
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From: Central Illiniois
Car: 89 Formula 350
Engine: 409 nitrous' small block
Transmission: 700r4
Re: RPM Wrong?
My first instinct would be to trust the reading from tunerpro as stock tachs are notorious for being inaccurate. If you had a timing light with an rpm indicator it would be easy enough to check.
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: RPM Wrong?
I'm with what rhuarc31 said. Check out this thread on the electronics board:
https://www.thirdgen.org/forums/elec...meter-fix.html
The one in the '92 also reads a bit high.
RBob.
https://www.thirdgen.org/forums/elec...meter-fix.html
The one in the '92 also reads a bit high.
RBob.
Joined: Mar 2006
Posts: 4,370
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Car: 1973 Datsun 240Z/ 1985 S-15 Jimmy
Engine: Turbo LX9/To be decided
Transmission: 5-speed/T-5
Axle/Gears: R200 3.90/7.5" 3.73
Re: RPM Wrong?
All I had to read was digital dash and realized that it probably is the culprit here. Most digital dashes from GM are KNOWN to be hugly inaccurate AND problematic.
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