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Author Topic:   Carb linkage
Dirt Full Roller

Total posts: 53
posted September 21, 2005 05:14 PM  
Has anyone ever run there there sec throttle plates in a 1:1 ratio with the prim? If so how does it work out compared to a progressive setup?

Dirt Full Roller

Total posts: 58
posted September 21, 2005 08:00 PM  
My 1st carb was setup like that I kept blowin the tires off coming out of the corner. I never could work the throttle like I wanted until I switched it. I would go w/ a progressive setup.
My 2 cents

Dirt Forum Champ
Total posts: 2007
posted September 22, 2005 05:58 AM  
To me 1:1 is the way to go. It gives you more control over the secondaries opening, or more feel as you put your foot in it. Lets you control it easier on slick track. With 1:1 both open roughly the same time, with progressive you have to have the primaries open roughly 1/2 to 2/3 before the secondaries start therefor you now are opening the secondaries from 0 to wide open in only 1/3 the pedal travel you had before, making it harder to control and feel.
When I was looking at new carbs anything i looked at 1:1 was standard. You could get progressive but most good builders will tell you the same thing above.

J 46
Dirt Full Roller

Total posts: 28
posted September 22, 2005 07:24 AM  
We run are carb that way also on slick tracks 1:1 you don`t get that explosion when the secondaries kick in , it is smooth power and you can feel it .

Dirt Forum Champ
Total posts: 1019
posted September 22, 2005 07:28 AM  
This is correct as stated above. Most, if not all, of our hi end 4bbls we are building now, are 1:1. As long as the throttle pedal geometry (pedal ratio) is high enough that the driver has more than 1" of total travel, it is much easier to control throttle position to limit tire spin...especially with the IMCA mod tires.
Often, we'll supply our carbs with interchangeable links so the driver can go back to progressive if they see fit, but honestly, 99% of the time they wind up leaving it 1:1.


Dirt Full Roller

Total posts: 53
posted September 23, 2005 08:30 PM  
Do you build these for your own use or for other people? I just got an holley 750 alky that is all stock, looking to sup it up a littal befor next year. If you dont do it who would be a good persone to talk to about it?

Dirt Forum Champ
Total posts: 1019
posted September 24, 2005 06:25 PM  
We build them for all racers at all levels nationwide. I own Kinetic Performance.
Countless victories and track championships have been won with our carbs.

See our website (although it needs updating)....

We've been a proud sponsor of these forums in the past.

So to answer, yep, I build carbs, restore carbs, repair, salvage, and "soup up" carbs. We stock parts for Holley, Rochester, and some Carter too, as well as do muscle car and street car carb restorations. We also sell about every brand of racing part from entry level needs to Busch, SAS, etc.
OK, enough shameless plugging of myself... LOL!

You can catch me here, or email:
Or our shop phone is: 607-277-6462 (early evenings or weekends are best).

Thanks for asking,
Dayton Umholtz, co-owner
Kinetic Performance

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