HOME FORUM RULES CONTACT
     
   
   

Go Back   CLASS RACER FORUM > Class Racer Forums > Stock and Super Stock Tech
Register Photo Gallery FAQ Community Calendar

Reply
 
Thread Tools Display Modes
Old 08-13-2021, 09:24 AM   #1
Stan Weiss
Senior Member
 
Stan Weiss's Avatar
 
Join Date: Apr 2020
Location: Phila, PA
Posts: 793
Likes: 0
Liked 733 Times in 384 Posts
Default Re: starting line gear ratio?

This is what my software suggests.


Stan
Attached Thumbnails
Click image for larger version

Name:	ab-slr-rod.gif
Views:	2187
Size:	25.7 KB
ID:	58246  
Stan Weiss is offline   Reply With Quote
Old 08-13-2021, 10:31 AM   #2
Mike Pearson
VIP Member
 
Mike Pearson's Avatar
 
Join Date: Mar 2007
Posts: 2,444
Likes: 613
Liked 1,916 Times in 574 Posts
Default Re: starting line gear ratio?

Back when I ran a stick in my car the SLR was about 19 to 1. With the same engine combo and a glide the SLR is 12 to 1. The engine is much better now and the car is about a second faster than it was with the stick.
__________________
Mike Pearson 2485 SS
Mike Pearson is online now   Reply With Quote
Liked
Old 08-15-2021, 10:06 AM   #3
Bench Racer
Member
 
Join Date: May 2002
Location: Green Creek (Tryon) North Carolina
Posts: 331
Likes: 69
Liked 99 Times in 21 Posts
Default Re: starting line gear ratio?

For what it’s worth, my brother ran a 58 Chevy wagon back in the 80’s in IHRA Super Stock (basically a econo modified engine). It was a 283 that weighed 3839 and ran a turbo 350 with a 6:83 Dana and 29 and 30 inch tires for the 1/8 and 1/4. The torque converter was pretty a good piece back then but could likely have been ran on the street now. The car held the IHRA class record before he bought it and did until he sold it. I don’t remember any 60’ numbers but the car got quicker after putting In a 2:75 low gear. Don Jackson
Bench Racer is offline   Reply With Quote
Liked
Old 08-15-2021, 12:51 PM   #4
Bernhard
Junior Member
 
Join Date: Jan 2012
Posts: 30
Likes: 0
Liked 1 Time in 1 Post
Default Re: starting line gear ratio?

How does engine cubic inch and an engine's ability to RPM factor into the SLR?
Bernhard is offline   Reply With Quote
Old 08-15-2021, 11:23 PM   #5
Mike Rietow
Junior Member
 
Mike Rietow's Avatar
 
Join Date: Apr 2017
Posts: 93
Likes: 19
Liked 30 Times in 16 Posts
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.


__________________
7x S/Pro 'Sunshine" http://ottm.store
https://youtu.be/I8QWEaqeFRw

Last edited by Mike Rietow; 08-15-2021 at 11:31 PM.
Mike Rietow is offline   Reply With Quote
Old 08-15-2021, 11:56 PM   #6
6130
Member
 
Join Date: Jul 2012
Location: Texas
Posts: 409
Likes: 295
Liked 117 Times in 50 Posts
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.
6130 is offline   Reply With Quote
Old 08-16-2021, 12:40 AM   #7
Steve Stickel
Member
 
Steve Stickel's Avatar
 
Join Date: Feb 2012
Location: South Coast, Massachusetts
Posts: 146
Likes: 160
Liked 50 Times in 23 Posts
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
Attached Thumbnails
Click image for larger version

Name:	startratios.jpg
Views:	1413
Size:	221.8 KB
ID:	58274  
__________________
Steve Stickel
1161 Stk
1167 SS
Steve Stickel is offline   Reply With Quote
Old 08-16-2021, 01:07 AM   #8
Mike Rietow
Junior Member
 
Mike Rietow's Avatar
 
Join Date: Apr 2017
Posts: 93
Likes: 19
Liked 30 Times in 16 Posts
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
__________________
7x S/Pro 'Sunshine" http://ottm.store
https://youtu.be/I8QWEaqeFRw
Mike Rietow is offline   Reply With Quote
Old 08-24-2021, 09:56 PM   #9
GUMP
VIP Member
 
Join Date: May 2002
Location: Shelby, NC
Posts: 1,817
Likes: 2,156
Liked 2,336 Times in 549 Posts
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".....
GUMP is online now   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 03:37 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.