Thread: Tri-Power Carbs build.

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Thought I'd also post a couple of pictures of linkage that I've built. Personally I'm not to impressed with the aftermarket linkage I've seen, JMO but I think it looks too big and bulky.

The first is probably the simplest, A rod from the primary carb to the front carb and then linkage from the front to open the rear. You want an adjustable end on the outboard carbs to fine tune it. It's right when both carbs are full closed and there is no slack when they open.

The second picture is what I'm using on the Hemi, and just consists of a seperate linkage to each carb. It's adjust properly when both carbs open at the same time.

The couple of things that really need any fine tuning is the ratio between the linkage on the primary carb and that on the secondary carb(s). You want the end carbs linkage pivot point closer to the throttle shaft than the point on the primary carb. THis allows the end carbs to open faster and wider (relatively speaking) than the primary carb.

Normally on a street driven motor, I set the outboard carbs to start opening at 80 MPH on a level strech of road, and have them come in fairly quickly.

As far as Idle adjustment, you adust the center carb just like you would any 2 bbl.