TACH READING IS OFF!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Aug 20, 2001 | 09:55 AM

AaronIROCZ

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From: Tomball Texas

TACH READING IS OFF!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I posted this in the electronics board but had no responses. I have a 87 GTA 350 TPi that had a engine fire. I now have it running with a 87 IROC 350 TPI wiring harness. I noticed that when I rev it up when it sounds like 3000 rpms the tach says 6000 rpms. Do I need to add a filter or resistor in the signal wire or something?? PLEASE HELP NOBODY IN THE ELECTRONICS BOARD HAD ANY INFO.

------------------
89 Iroc 350 TPI,
Forged pistions
Comp roller Cam .510 lift 230dur
Flowmaster exhaust
Dart Iron Eagle heads 200cc runners 64cc chambers
MINI RAM SOON!!!!!
stock TPI for now 24# inj
87 Trans Am GTA 350 TPI
had engine fire
SHE NOW RUNS!!!! GREAT!!
Flowmaster exhaust
LT1 Injectors

Aug 21, 2001 | 10:24 AM

AaronIROCZ

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From: Tomball Texas

CAN ANYBODY HELP?!?!?!?!?!?!?!!?!?!?!?!!?

------------------
89 Iroc 350 TPI,
Forged pistions
Comp roller Cam .510 lift 230dur
Flowmaster exhaust
Dart Iron Eagle heads 200cc runners 64cc chambers
MINI RAM SOON!!!!!
stock TPI for now 24# inj
87 Trans Am GTA 350 TPI
had engine fire
SHE NOW RUNS!!!! GREAT!!
Flowmaster exhaust
LT1 Injectors

Aug 21, 2001 | 07:21 PM

mckenzie

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Joined: Jul 2001

Posts: 314

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From: tn. usa

is the tach factory or aftermarket?

------------------
86 iroc 305tpi auto. mild cam

Aug 22, 2001 | 09:22 AM

AaronIROCZ

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From: Tomball Texas

it is the factory tach, it does have the digital dash and i also added a remote mounted accel super coil.

------------------
89 Iroc 350 TPI,
Forged pistions
Comp roller Cam .510 lift 230dur
Flowmaster exhaust
Dart Iron Eagle heads 200cc runners 64cc chambers
MINI RAM SOON!!!!!
stock TPI for now 24# inj
87 Trans Am GTA 350 TPI
had engine fire
SHE NOW RUNS!!!! GREAT!!
Flowmaster exhaust
LT1 Injectors

Aug 25, 2001 | 04:43 PM

gta007

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Joined: May 2001

Posts: 153

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From: Middle TN USA

Car: 89 FORMULA 350 / 1991 RX7

Engine: 5.7 L98 / LT1

Transmission: 700R4 / 6 speed manual

Axle/Gears: 3.42 posi / 4.11 posi

if your runnig a MSD box. that will affect your tach with out a fiter.

Aug 25, 2001 | 10:11 PM

AaronIROCZ

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From: Tomball Texas

Everything is stock. THis is very odd since it is stock. Stock digital tach, and stock wiring, only thing that is not is the coil which is the remote mounted accel super coil.

------------------
89 Iroc 350 TPI,
Forged pistions
Comp roller Cam .510 lift 230dur
Flowmaster exhaust
Dart Iron Eagle heads 200cc runners 64cc chambers
MINI RAM SOON!!!!!
stock TPI for now 24# inj
87 Trans Am GTA 350 TPI
had engine fire
SHE NOW RUNS!!!! GREAT!!
Flowmaster exhaust
LT1 Injectors