1991 Formula 305 TPI 5 Speed Speedo & Tach?
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Car: 1999 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23 10 Bolt
1991 Formula 305 TPI 5 Speed Speedo & Tach?
I know the 90-92 camaros with the 305 tpi, 5 speed, single cat and non performance gearing did not get 145mph & 5500 red line tach but is the same true for the firebirds? If a 91 formula 305 tpi 5 speed has the 140 speedo and 8000 rpm tach is that an indicator it has the dual cats and performance gear?
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Re: 1991 Formula 305 TPI 5 Speed Speedo & Tach?
If it's a factory 305 TPI with factory 5-speed, it should have the N10 based on this Pontiac bulletin:
You can post the VIN if you don't have the SPID and we can look up the RPOs. Looking at the RPO codes is better to see exactly what it would have had from the factory rather than going through a secondary option (gauge pack).
You can post the VIN if you don't have the SPID and we can look up the RPOs. Looking at the RPO codes is better to see exactly what it would have had from the factory rather than going through a secondary option (gauge pack).
The following 2 users liked this post by JT:
SLP IROC-Z (07-27-2024), TTOP350 (07-28-2024)
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Car: 1999 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23 10 Bolt
Re: 1991 Formula 305 TPI 5 Speed Speedo & Tach?
If it's a factory 305 TPI with factory 5-speed, it should have the N10 based on this Pontiac bulletin:
You can post the VIN if you don't have the SPID and we can look up the RPOs. Looking at the RPO codes is better to see exactly what it would have had from the factory rather than going through a secondary option (gauge pack).
You can post the VIN if you don't have the SPID and we can look up the RPOs. Looking at the RPO codes is better to see exactly what it would have had from the factory rather than going through a secondary option (gauge pack).
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 1991 Formula 305 TPI 5 Speed Speedo & Tach?
Pontiac pretty much mandatory loaded the formulas with the good stuff on those 2 drivetrain combos.
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SLP IROC-Z (07-28-2024)
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