Would it makes sense to use an after market intake manifold with a stock feedback carb? I'm in the process of putting my 85 F150 w/ 300 and stock feedback system back to the best it can be. I have changed the O2 sensor and corrected a few other issues and now have what I think to be a decently running feedback system. I averaged over 18mpg during a 100 mile trip crusing over 70mpg and about 30% town driving last weekend.

I'm looking to get the best torque and mileage out of the engine as possible so keeping the single barrel with electronics isn't a problem.

 

By aftermarket, are you meaning getting an aftermarket 4bbl intake and then putting the 1bbl back on it?

 

That is correct.

 

I don't think you'd gain much from it performance wise (maybe a little, but the 1bbl would limit you). But there are some emissions components that wouldn't be compatible with the 4bbl intake, such as the EGR spacer underneath the carb.

I also don't think there is (although there may be) an adapter to let you put a 1bbl carb onto a 4bbl intake. You'd probably have to go from a 1 - 2 adapter, and then bolt that onto a 2 to 4bbl adapter.

What is your reasoning behind wanting to use one if you're sticking with the 1bbl?

 

Just playing with ideas.

The EGR is vacuum controlled and not monitored by the computer as far as I can tell. It was disconnected until yesterday when I traced as many vacuum lines as I could and reconnected them.

I'm curious if doing some of the normal performance mods would help a stock intake, ignition system. I

 

I saw an Edelbrock single 1-bbl intake for a 300 once. Feller wanted $300 for it, though.

 

Those are pretty cool if you can find them. I know they were made for awhile by a few different companies, but not anymore. So it's just a matter of tracking one down.

 

That would be fun to find. I'll try to keep my eye out for one.

 

Heck, I wish I just had a picture of the darn thing...