what about a V8 tach in a v6?
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Joined: Jan 2009
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From: Mesquite, Texas
Car: 89 rs, 86 Trans Am
Engine: RS-V6... Trans Am-LG4
Transmission: RS-T5... Trans Am 700r4
what about a V8 tach in a v6?
I'm so sick of my tach reading too high... I even bought a NOS one, and it was worse than the one I have now. It reads 4000 RPM at highway speeds.
Yesterday I picked up a V8 cluster just to get the Speedometer (with a working trip odometer) It has a nice looking V8 tach in there, but what would happen to my tach and oil pressure readings if I put it in my car? would it read 33% lower than normal?
Or...if you have a v6 tach and want to swap me it for this v8 tach, let's do it
Yesterday I picked up a V8 cluster just to get the Speedometer (with a working trip odometer) It has a nice looking V8 tach in there, but what would happen to my tach and oil pressure readings if I put it in my car? would it read 33% lower than normal?
Or...if you have a v6 tach and want to swap me it for this v8 tach, let's do it
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Joined: Jan 2006
Posts: 3,341
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From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Tachy Response
If the “V8 tach” you have is OEM you can calibrate it for the V6 by replacing a resistor in the dash.
It’s contained on a small plug-in PCB or integrated in the main board.
On the PCB you’ll see a resistor chip.
Desolder pins 4 & 10.
Use a 500K potentiometer.
Solder it across traces 4 & 10.
Move the potentiometer to half way.
Start the engine and compare the tach reading with a test equipment quality tach.
Dial it in, unsolder the potentiometer, measure it and install a matching resistor.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
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How bout those too scared to drive without headlights in the daytime
and the ones that need headlights for a little rain
.
It’s contained on a small plug-in PCB or integrated in the main board.
On the PCB you’ll see a resistor chip.
Desolder pins 4 & 10.
Use a 500K potentiometer.
Solder it across traces 4 & 10.
Move the potentiometer to half way.
Start the engine and compare the tach reading with a test equipment quality tach.
Dial it in, unsolder the potentiometer, measure it and install a matching resistor.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
How bout those too scared to drive without headlights in the daytime
and the ones that need headlights for a little rain.
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