Visit The Dirt Forum for More Information

Author Topic:   Vacuum secondary carbs: who runs them???
mod27
Dirt Freak

Total posts: 325
posted March 10, 2005 06:41 PM  
Thinking about trying a new carb with the vacuum secondary set up.
Looking for anyones input on how they like theirs.
Do they work as good on tacky tracks like they do for dry slick tracks

Any thoughts is appreciated

wfoondirt
Dirt Forum Champ
Total posts: 505
posted March 11, 2005 07:39 AM  
I've been using a C&S VS for about 8 years and they work great on slick tracks. On tacky tracks you need to make sure your car will turn because the VS can make it harder to turn the car with the throttle.

backofpack
Dirt Maniac

Total posts: 102
posted March 11, 2005 07:17 PM  
weve ran one have one now but we use a cheater screw so it works like a regular carb

James Birmingham
Dirt Full Roller

Total posts: 28
posted March 15, 2005 09:27 AM  
Man if its worked out a vac sec will work well on a dry track. Not so good on a tacky track, when the track will hold all you can give it as quick as you can nail it. Don't do the screw trick, it works but with out a accel pump on the rear it creates a big lean spot untill the mains begin flowing fuel. (hesitation) not good on a tacky track when you need it go. I've converted a few and converted them to 4 corner idle to get the smoothest response. It helps at tip in. If you got a crewman that knows how to tune he can get the Idle feed restrictions set right and the transfer slot to feed properly.
Jim

Back to the Archives