Tuning tripple carbies?

[martin67]

Hi, I am having trouble with my old race car running rich. Runs three carter BBR-1's I have not had much experience with these carbies and I was wondering what effect dropping the float bowl level slightly would have?

[Plymouthy Adams]

it will lower the fuel available when running out top end..do you have carb sync tool..if not..I doubt you will get it set..you may get close but close is still not good enough with multiple carbs...

[Don Coatney]

What are you using for carburetor air filtration? I found that doubling up the air filters on my dual system corrected the rich running problem.

[Don Coatney]

it will lower the fuel available when running out top end..do you have carb sync tool..if not..I doubt you will get it set..you may get close but close is still not good enough with multiple carbs...

Picture of the sync tool.

[martin67]

Thanks for that info. Without air cleaners it seems much better, so there in lies the problem.

[greg g]

How about some pictures of your set up??? Are you choke buterlies fully open. where are your accelerator pump linkages set for length of stroke?? I have my dual carbs det for the shortest stroke. Are all your intermediate power valves getting a proper vacuum signal to keep them closed at high vacuum??? If they are not getting their signal from the maifold the spring will hold them open all the time, which will seriously richen your mixture.

Also your profile is a bit lacking in iformation regarding your vehicle, You might want to give some though to filling a it of info, or including that info in your header or signature. You can add this by using the user CP editing tools. Thanks.

Edited September 30, 2012 by greg g

[martin67]

Entered a hill climb next sunday, proof is in the pudding I guess!

[1941Rick]

I removed the power valve springs on my set up to lean it out...big difference

How many carbs are you idling with? Do you use progressive linkage?

[martin67]

Have run out of time getting the car ready for a hillclimb on Sunday, so it will just have to do as it is. I havent long had this car and the middle carb is a bit lower in vaccum, one front brake is a bit slow in coming off, but all in all it is going pretty quick hopefully will keep up with the field or a bit better. Thank you all for your help.