vhrocker

hello all...i just built a 383 stroker and cant seem to get the right air--fule mixture...i tried different fuel regulators and it runs good for awhile and then dies from either to much fuel or sometimes not enough so i have to keep adjusting the regulator....any ideas thanks

73shark

Carb or FI?

vhrocker

hey shark... i'm running a edelbrock 750 carb

73shark

If the carb is new or a recent rebuild (if neither, rebuild it), then check fuel pressure at the carb. You can do this with most vacuum gauges as they are dual purpose. With the engine warmed up, disconnect the fuel line to carb and connect the gauge and restart the car. It'll run with what's in the bowl. If memory serves me, should be around 7-9psi. Check the spec for your carb tho. Too much pressure will overcome the needle and seat and overflow the bowl, killing the engine. If this isn't it, then probably need to get into the carb settings. Not familar with the Edelbrock carb. Is it a square bore or spread bore?

Just curious why you are using a regulator. Are you using an electric pump? If not, then the OEM AC pump has never caused me any problems on any of my GM cars.

C1 Guy

I'm curious. Is there an attraction to carbs other than, perhaps, the cost factor?

The vast majority of the performance crate engines come with either complete carb setups or carb intake manifolds, and I just don't get it.

But if it's the cost factor, then sure, I get that.

73shark

Probably the cost of the wiring harnes, computer, electric fuel pump, etc. Plus even if you get an EFI crate motor, you still have to program it for your car and how you'll use it.

vhrocker

shark im pretty sure its a spread bore...the car its stored away for the winter ill have to check on it to make sure....i used a fuel regulator to see if i could adjust and get better fuel mileage....thanks for your info ill try anything if nothing works ill just go back to a stock set up and elimitnate it

vhrocker

maybe more guys are getting into the old school of performance i think you can do more to get more h.p.

73shark

If your carb is working correctly and you have a stock mech. fuel pump that's working correctly, a regulator won't affect mpg. Now if you are using an electric fuel pump, then a regulator is in order.

lonnieanderson

go with fuel injection you retard.
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so many idiots, so little ammo.........