?s RE: tbi to carb

Vacuum hose routing: Can adjustable fpr and vacuum advance use the same port on carb? Or should AFPR go directly to manifold?

Evap canister purge to vacuum source on carb, manifold, or do I even need it? Line from tank is good and the canister has a vent.

Can I get a throttle cable from a g20 van that was carbed? The tbi cable is too short and comes in from the front. Needs to pull from back.

Is there a TV cable from same that would work as the connector on the pin on the Edelbrock does not match the end of the TV cable. Because tbi?

This is regarding the v8 conversion in my 92 GMC Safari (Jean Clyde Damn Van )
Thanks

Why would you want a vacuum referenced fuel pressure regulator on a carbureted car? Just set the thing to 6 and let it eat.

Agreed. No variable fuel pressure with a carb. You want somewhere in the 4 - 6 psi range (depends on the carb, some have lower pressure limits than others before you'll flood the thing).

Oh. Okay. Thanks. Didn't think this through obviously .

Vacuum advance should use 'ported' vacuum. That's a vacuum source that only has vacuum at part throttle, but not at idle or WOT. You can test for this if the engine already runs, or if it doesnt you can probably visually ID it by the fact that the correct port will go to a hole drilled just above the throttle plate. If you hook a vacuum advance to unported vacuum it can make the engine difficult to start.

Vigo wrote: Vacuum advance should use 'ported' vacuum. That's a vacuum source that only has vacuum at part throttle, but not at idle or WOT. You can test for this if the engine already runs, or if it doesnt you can probably visually ID it by the fact that the correct port will go to a hole drilled just above the throttle plate. If you hook a vacuum advance to unported vacuum it can make the engine difficult to start.

Not generally true on a Chevrolet. Most were built with manifold vacuum to the distributor. They run better at idle with lots of timing, and once you are off idle, the vacuum signal is pretty much the same.

You are correct about the port just above the throttle on a lot of cars, though. Chevrolet uses that one to run the canister purge.

On the Edelbrock I picked the port that is indicated for non emissions controlled vehicles to go to the vacuum advance. The one right-of-center in the photo.

Vac advance being ported vs manifold will depend on the engine. Some will idle better with the extra idle timing from manifold vac to the advance, others (sometimes tiny stock cams) will be happier or easier to tune with ported vac.

Any insight on my other questions?