At the strip, I would shift it down to 1 and do my burnouts/launching. Anyways, during the burnout, the tach went up to 7K everytime!! This can't be right, can it? Is there any way the sender for the tach could be bad? Or could it be just the tach? The tach is from a V6 car if that makes any difference at all. Any help would be greatly appreciated. Thanks in advance.

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1984 Camaro Sport Coupe - 73K Miles, Rebuilt 355 TPI L98, Crane 2032 CompuCam - 214/220 @ .050", Crane adjustable fuel pressure regulator, MSD Blaster coil, custom burned PROM, stock TPI intake, Accel 24# injectors, gutted air box with K&N filters
F41 Suspension Package, 700R4 Tranny, TCI Breakaway torque converter, 3.27 Disc Brake Posi Rear
Hooker Shorty Headers, Catco High-Flow 3" Cat, Flowmaster 3" American Thunder Cat-Back
New Paint
Best 1/4 Mile Run:
14.137 @ 94.57 MPH

1992 1LE B4C Police Camaro RS - 305 TPI 5-Speed

 

If u have a v8 hooked up to a v6 tach it will not work, the v6 tach is calibrated different so it will read wrong when u have a v8 hooked up. Your going to have to get a aftermarket tach

 

Do you have slicks on your car? If you're burning in 1st on the floor 7 is a distinct possibility. When I do my burns I do it in drive at about 1/2 throttle so it still goes up through the gears. You want about 70 mph tire speed with low RPM. Don't burn the hell out of them because they won't work, and for god's sake please don't be doing burns on street tires.

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'87 Bird 350 .060 over 700R4 + Lots more

 

I am doing the burnouts on slicks. I guess I do need a V8 tach then. Thanks.

 

Oh, and do I need to replace just the tach, or do I need a V8 cluster too? The entire cluster is from a V6 car. The other gauges should be accurate for my V8, right? Thanks.

 

actually I think your speedo will be off too because the spedo works of the gear number and the RPM numbers in the transmission. At least this is what I was told.

 

My speedo has been off too. I have a 3.27 rear and tires with a larger profile than the stock 16" IROC rims. The speedo gear I have is for a 3.23 rear and stock size 16" IROC tires. So, the gear is right. The speedometer seems to be off by more the faster I go. I just calibrated it so it sits on the little mark at zero. Thanks for the help.

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1984 Camaro Sport Coupe - 73K Miles, Rebuilt 355 TPI L98, Crane 2032 CompuCam - 214/220 @ .050", Crane adjustable fuel pressure regulator, MSD Blaster coil, custom burned PROM, stock TPI intake, Accel 24# injectors, gutted air box with K&N filters
F41 Suspension Package, 700R4 Tranny, TCI Breakaway torque converter, 3.27 Disc Brake Posi Rear
Hooker Shorty Headers, Catco High-Flow 3" Cat, Flowmaster 3" American Thunder Cat-Back
New Paint
Best 1/4 Mile Run:
14.137 @ 94.57 MPH

1992 1LE B4C Police Camaro RS - 305 TPI 5-Speed

 

Anybody know if I have to replace the V6 cluster with a V8 cluster? Or do I only need to replace the V6 tach with a V8 tach? Thanks.

 

IIRC the oil pressure gauge is different in the 6-cylinder dash; seems like it goes to 80 instead of 60, at least in some years.

AFAIK you should be able to swap the little circuit board that goes on the back of the tach, not necessarily the whole tach. That way your pointers and scales will all stay matching, if you keep your existing ones.

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