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[SD] Jade Gray 1992 Firebird Formula 5.7L

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Old Aug 23, 2023 | 11:09 AM
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Jade Gray 1992 Firebird Formula 5.7L

Factory-ordered as one of the last 3rd Gen Firebirds ever made; built in June, 1992 (one owner).
Special L98 EFI engine, high-performance drive train and suspension package.
All original equipment, interior and Jade Gray Metallic paint.

GM would only build the T-roof with an automatic transmission, for this engine!
Extras include original dealer build-sheet, full maintenance documentation, maintenance manuals, Wolf racing bra and car cover.
68,600 mi.


On the block at Kool Deadwood Nights, South Dakota - Friday, August 25th, Lot no.73: $30k reserve




Last edited by Von_L; Aug 23, 2023 at 01:03 PM.
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Old Aug 23, 2023 | 11:35 AM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Price? Miles?
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Old Aug 23, 2023 | 12:51 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

WOW!!!!!
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Old Aug 23, 2023 | 01:04 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Price & miles updated - Thanx!
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Old Aug 23, 2023 | 01:05 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Sheeeesh thats a GORGEOUS car - good luck with auction!
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Old Aug 23, 2023 | 11:47 PM
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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: Jade Gray 1992 Firebird Formula 5.7L

Beautiful car. Glwts

GM only did the automatic with the 5.7.
TTOPS could be had on any combination in certain years on formula.
now the blk diamond spoke wheels were mandatory in 92 with the 5.7/ttop combo.

Last edited by TTOP350; Aug 24, 2023 at 08:29 AM.
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Old Aug 24, 2023 | 05:01 AM
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Re: Jade Gray 1992 Firebird Formula 5.7L

30k$, I think the price is high bro, can you reconsider.
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Old Aug 24, 2023 | 08:59 AM
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Re: Jade Gray 1992 Firebird Formula 5.7L

I was under the impression that all 91-92 L98 cars had to be hardtops EXCEPT the Formula. However, I've never seen one of these before and if it is a factory L98 CC1 car it would prove that bit of Thirdgen trivia? Great looking car for sure!
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Old Aug 24, 2023 | 03:09 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Long time lurker here. Thanx for the kind words, guys - and the vicarious knowledge, advice, etc.

The 1991-92 hard-top/t-top issue was that the t-top with the L98 would not accommodate a manual transmission. That is, the rate of onset of torque forces (impulsive loading of the structure) could only be controlled within prescribed limits using the AT. That was the factory-order trade-off requirement for the Formula. Not sure how it applied to the other variants. Remember that the Firehawk convertible was also very briefly produced in this era (72 ordered, 70 built, IIRC), which included a lot of the same performance h/w. Probably some interesting structural differences hidden in that one.
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Old Aug 24, 2023 | 03:25 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Originally Posted by TA76
I was under the impression that all 91-92 L98 cars had to be hardtops EXCEPT the Formula. However, I've never seen one of these before and if it is a factory L98 CC1 car it would prove that bit of Thirdgen trivia? Great looking car for sure!
This car has the T-Top option because it has the PW7 wheels:
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Old Aug 24, 2023 | 04:14 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Originally Posted by Richarlison
30k$, I think the price is high bro, can you reconsider.
It's a very nice car but I've seen cars with 10k or fewer miles go for about the same amount of money. Although, this one is super desirable if it is indeed a factory CC1/L98 car.
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Old Aug 24, 2023 | 04:35 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Originally Posted by 87WS6
It's a very nice car but I've seen cars with 10k or fewer miles go for about the same amount of money. Although, this one is super desirable if it is indeed a factory CC1/L98 car.
It appears to be a factory CC1/L98 car to me. As the Pontiac Distribution Bulletin shows, they do exist.

If the OP wants to post the VIN we can easily verify. I could not find the VIN in the auction listing.
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Old Aug 24, 2023 | 06:04 PM
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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: Jade Gray 1992 Firebird Formula 5.7L

Originally Posted by Von_L
Long time lurker here. Thanx for the kind words, guys - and the vicarious knowledge, advice, etc.

The 1991-92 hard-top/t-top issue was that the t-top with the L98 would not accommodate a manual transmission. That is, the rate of onset of torque forces (impulsive loading of the structure) could only be controlled within prescribed limits using the AT. That was the factory-order trade-off requirement for the Formula. Not sure how it applied to the other variants. Remember that the Firehawk convertible was also very briefly produced in this era (72 ordered, 70 built, IIRC), which included a lot of the same performance h/w. Probably some interesting structural differences hidden in that one.

5.7 and 5 speed were never offered because the transmission wasn't rated for the 350s tq. Nothing to do with structure loading, esp with the late 91 and all 92 cars that used structural adhesives in addition to normal welding.

The Ttop/350 combo was a weight and cafe mpg rating thing. That is why the lightweight diamond spoke wheels were mandatory with the 350/ttop option because they were lighter than the formula wheel.

Only 25 1992 firehawks were built. 1 ttop car and 1 trans am vert. The reason that happened was because late in the year, cars were pulled from dealer lots and not built with the required B4U code for firehawk conversion. That is also when SLP opened up color options. They were all supposed to be red hard top 350 formulas.



Last edited by TTOP350; Aug 29, 2023 at 08:07 AM.
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Old Aug 24, 2023 | 07:17 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Originally Posted by TTOP350
5.7 and 5 speed were never offered because the transmission wasn't rated for the 350s tq. Nothing to do with structure loading, esp with the late 91 and all 92 cars that used structural adhesives in addition to normal welding.

The Ttop/350 combo was a weight and cafe mpg rating thing. That is why the lightweight diamond spoke wheels were mandatory with the 350/ttop option because they were lighter than the formula wheel.

Only 25 1992 firehawks were built. 1 ttop car and 1 trans am vert. The reason that happened bas because late in the year, cars were pulled from dealer lots and not built with the required B4U code for firehawk conversion. That is also when SLP opened up color options. They were all supposed to be red hard top 350 formulas.


Great info, TTOP - thanx for that, the only complete explanation I've ever seen. Was not aware of the transmission rating issue, but informal queries about getting the manual transmission received answers that appeared to indicate a structures limit. Would like to see a mo'betta, hi-res copy of that bulletin, if able. These links only seem to generate a small, lo-res version.
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Old Aug 24, 2023 | 08:19 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Originally Posted by Von_L
Great info, TTOP - thanx for that, the only complete explanation I've ever seen. Was not aware of the transmission rating issue, but informal queries about getting the manual transmission received answers that appeared to indicate a structures limit. Would like to see a mo'betta, hi-res copy of that bulletin, if able. These links only seem to generate a small, lo-res version.
I previously posted the bulletin linked below:
https://www.thirdgen.org/forums/fire...ml#post6510576

Click on the link and then click on the image to view full-size.
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Old Aug 25, 2023 | 08:17 AM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Thanks for the info, so the weight thing makes sense. Which is why you could only get the L98/T-top combo in a Formula in 91 and 92. Correct me if I'm wrong but I've never seen a 91-92 L98/T-top TA, GTA or Z28. Even for the Formula I've wondered if that combo was more of an "Urban Myth" kind of thing. If this car is legit, as it looks to be, it confirms the combo for the 91-92 Formula only info.
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Old Aug 25, 2023 | 09:52 AM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Good Luck with the auction tonight... Looks like a beauty!
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Old Aug 25, 2023 | 12:06 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Originally Posted by TA76
Thanks for the info, so the weight thing makes sense. Which is why you could only get the L98/T-top combo in a Formula in 91 and 92. Correct me if I'm wrong but I've never seen a 91-92 L98/T-top TA, GTA or Z28. Even for the Formula I've wondered if that combo was more of an "Urban Myth" kind of thing. If this car is legit, as it looks to be, it confirms the combo for the 91-92 Formula only info.
That is correct. Atleast on the Firebird side. No 1990-1992 T/As with CC1 and L98 from the factory, even though they also had the PW7 wheel.
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Old Aug 25, 2023 | 12:38 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Neat car. Hope you get good money for it!
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Old Aug 25, 2023 | 06:34 PM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Looks like it went for $20k which is a good buy imo.
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Old Aug 26, 2023 | 10:20 AM
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Re: Jade Gray 1992 Firebird Formula 5.7L

Originally Posted by topduarte
Looks like it went for $20k which is a good buy imo.
Agreed.
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