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Old 08-15-2021, 12:51 PM   #11
Bernhard
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Default Re: starting line gear ratio?

How does engine cubic inch and an engine's ability to RPM factor into the SLR?
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Old 08-15-2021, 11:23 PM   #12
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Default Re: starting line gear ratio?

I caught a little NHRA Stock qualifying highlights today from Topeka. I don't know much about this class really as far how elaborate the engines are allowed to be, or how much they have to weigh, but this car runs about like my n/a 23 degree sbc on 10" tire 69Nova.

What SLR do these class cars typically run? What transmission and how many rpm's do they typically cross? It was a current model Camaro, is it limited to an LS? I think the announcer said 409cid. Just curious, run pretty good seemed like.


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Old 08-15-2021, 11:56 PM   #13
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Default Re: starting line gear ratio?

Quote:
Originally Posted by Mike Rietow View Post
I caught a little NHRA Stock qualifying highlights today from Topeka. I don't know much about this class really as far how elaborate the engines are allowed to be, or how much they have to weigh, but this car runs about like my n/a 23 degree sbc on 10" tire 69Nova.

What SLR do these class cars typically run? What transmission and how many rpm's do they typically cross? It was a current model Camaro, is it limited to an LS? I think the announcer said 409cid. Just curious, run pretty good seemed like.
An FS/C car is not a traditional Stock Eliminator race car, it's a factory race car with no VIN. The factory race cars come with Ford 9" rear ends and engine combinations that may not be available in regular production-based cars.

A better comparison with a traditional production-based Stock Eliminator race car, might be a '99-'02 LS 346 V8 Camaro A/SA car. The current national record in A/SA is 9.65 at 136.3 mph.

A car like that would have a stock throttle body, stock intake manifold, stock heads with an NHRA-legal valve job, stock bore (plus up to .040"), stock stroke, stock compression ratio pistons, stock valve lift, stock rocker arm ratio, and so on, with a "metric" TH200 3-speed automatic transmission with no trans brake, an 8" converter, and 9x30" tubeless radial slicks.

Last edited by 6130; 08-16-2021 at 12:26 AM.
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Old 08-16-2021, 12:40 AM   #14
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Default Re: starting line gear ratio?

here's a more detailed chart borrowed from Cale Aransons Black Magic clutch website ..........lots of useful information there.

http://www.blackmagicclutches.com/index.html
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Old 08-16-2021, 01:07 AM   #15
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Default Re: starting line gear ratio?

Quote:
Originally Posted by 6130 View Post
An FS/C car is not a traditional Stock Eliminator race car, it's a factory race car with no VIN. The factory race cars come with Ford 9" rear ends and engine combinations that may not be available in regular production-based cars.

A better comparison with a traditional production-based Stock Eliminator race car, might be a '99-'02 LS 346 V8 Camaro A/SA car. The current national record in A/SA is 9.65 at 136.3 mph.

A car like that would have a stock throttle body, stock intake manifold, stock heads with an NHRA-legal valve job, stock bore (plus up to .040"), stock stroke, stock compression ratio pistons, stock valve lift, stock rocker arm ratio, and so on, with a "metric" TH200 3-speed automatic transmission with no trans brake, an 8" converter, and 9x30" tubeless radial slicks.
Very cool, thanks

I gotta find a way to watch/follow these cars more
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Old 08-17-2021, 05:49 PM   #16
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Default Re: starting line gear ratio?

Rod: 350HP and 3600LB = 12.20 should be attainable.

Our Aspen Wagon NOP Stocker with 318 that put out actual
340 HP and weighed 3600 plus held the record @ 12.0 over
ten years ago.and ran 11.70 to 11.80 when needed.

It is an Auto so not comparable on ratios but shows what can be done on that HP/Weight.2.75 Low and 5:13 gear at Sea Level. 14.11 ratio and I think that stick would need a bunch more without a torque converter. 9.0x30 Radials (92.5 Cir.)
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Old 08-17-2021, 06:39 PM   #17
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Default Re: starting line gear ratio?

While HP and weight are very important you cannot leave out tire size when talking about SLR.


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Last edited by Stan Weiss; 08-17-2021 at 08:02 PM.
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Old 08-24-2021, 12:20 AM   #18
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Default Re: starting line gear ratio?

Stan,
I think I said" If traction is unlimited" or did I say available... ??
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Old 08-24-2021, 04:51 PM   #19
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Default Re: starting line gear ratio?

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Stan,
I think I said" If traction is unlimited" or did I say available... ??

Adger,
Size was to general a word to have used, I should have said Diameter.


Stan
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Old 08-24-2021, 09:56 PM   #20
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Default Re: starting line gear ratio?

Quote:
Originally Posted by 6130 View Post
An FS/C car is not a traditional Stock Eliminator race car, it's a factory race car with no VIN. The factory race cars come with Ford 9" rear ends and engine combinations that may not be available in regular production-based cars.

A better comparison with a traditional production-based Stock Eliminator race car, might be a '99-'02 LS 346 V8 Camaro A/SA car. The current national record in A/SA is 9.65 at 136.3 mph.

A car like that would have a stock throttle body, stock intake manifold, stock heads with an NHRA-legal valve job, stock bore (plus up to .040"), stock stroke, stock compression ratio pistons, stock valve lift, stock rocker arm ratio, and so on, with a "metric" TH200 3-speed automatic transmission with no trans brake, an 8" converter, and 9x30" tubeless radial slicks.
You get my vote for "Clueless Post Of The Year".....
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