multi carb question - 01/21/08 11:44 AM
I'm in the process of modifying a cylinder head (spare the details here) but the result will be three ports feeding two cylinders each. The plan is to repeat what I have seen done on two engines like mine and put three side draft carbs (Carter YH) on it without a plenum. More or less like the Weber type manifolds for the Chevy 6 type installation where each one feeds two cylinders without a plenum, although not that involved in terms of casting.
The question is... As I understand it from reading here when using a 3x1 manifold you do not use a choke on the two end carbs, or perhaps no choke at all. And also some accomodation has to be made for the poor vacuum signal regarding jetting.
I am assuming (not a good plan) that things are different when you do not have a plenum to allow sharing of one carb by all cylinders. Can I get some general info on how to begin as far as setup (mixture, jetting, choke)?
Thanks very much
Paul T
The question is... As I understand it from reading here when using a 3x1 manifold you do not use a choke on the two end carbs, or perhaps no choke at all. And also some accomodation has to be made for the poor vacuum signal regarding jetting.
I am assuming (not a good plan) that things are different when you do not have a plenum to allow sharing of one carb by all cylinders. Can I get some general info on how to begin as far as setup (mixture, jetting, choke)?
Thanks very much
Paul T