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Old 12-01-2010, 12:07 PM   #10 (permalink)
DonR
Master EcoModder
 
Join Date: Mar 2009
Location: Northeast Ohio
Posts: 269

The Wife's Hot Rod - '09 Pontiac G8 GT
Last 3: 23.22 mpg (US)

Big Outback - '13 Subaru Outback 2.5i

Little Outback - '02 Subaru Impreza Outback Sport
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I have an awful Carter BBD computer controlled carb on my Jeep. The vaccum diagram is just as complicated as the electrical diagram. Alot of guys end up putting on a Ford Motorcraft 2100 or MC-2150 stand alone carb & still pass emmissions tests. Husquavarna also put some catalytic converters on 2 stroke chain saws. So running a cat with a fairly simple carb is certainly doable.

I would look into some emmissions systems of some very early cat equiped vehicles & see what all was required. Most cats are killed by running rich, the unburned fuel burns at the cat causing the substrate to melt, plugging them up. This robs power & makes the car hiss everytime you hit the gas.

Someone else had mentioned some Clifford Performance products. They specialize in straight 6 parts. They sell cams for torque

A 4.3l v-6 is only slightly larger than the 230 cid 6 that chevy used & may bolt into where the small block v-8 would go. All the modern bits to help with emissions & fuel economy.

Good luck

Don
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