Carbs and boost
 

We've decided to boost my brothers 67 200ci I6 mustang. Everything is all lined up but I am not really a carb guy and I was just curious how to manage fuel in a carb car.

For timing do i just need a msd btm?

Re: Carbs and boost
 

There was a guy on turbomustangs.com that had a I6 boosted with a mostly stock holley 1bbl. Apearantly they have "crush proof" floats from the factory so its all good. I seem to remember him just having retarded the base timing and leaving the vacuum advance hooked up.

As far as I know all he did was make a bonnet for the carb and run a 1 to 1 rising rate regulator for the fuel. For lower boost I'm pretty sure you can just modify the factory mechanical pump to be boost referenced, but that seems sketchy.

If you need a regulator I have one, never used or installed, just U2U me if you're interested.

Re: Carbs and boost
 

For years this has been covered on this forum. Ted (CadRacer) has been playing with his late 60s chevy pickup in hopes to one day mount a very large t4 dumptruck turbo. If you're not going to at least search around or the search doesn't work I would suggest you to to go here: http://www.2quicknovas.com/bruces72nova.html

That should be your guide and give you a good feel on what direction to go in. I'm not going to answer questions that I've answered in the past about carbs. You can restrict the vacuum advance on the timing if you're worried, or update to a newer distributor.

Oh and there is nothing wrong with referencing your fuel pump.

Re: Carbs and boost
 

.. so how do you reference your fuel pump?

Re: Carbs and boost
 

You run a higher pressure fuel pump, then what is needed. Then your fuel pressure regulator does the rest.

Randy

Re: Carbs and boost
 

With carbs pressure isn't important...Volume is. You need volume to keep the bowls filled. Pressure is important with efi cars.


Hit up summit or jegs...There's plenty of regulators that are boost referenced that will get the job done. I'd personally recommend an aeromotive regulator.

Re: Carbs and boost
 

As far as boost referenting the pump, I saw where somone had soldered a vacuum fitting on the top of a regular mechanical fuel pump, I guess the idea is that the pump is seeing the same amount of pressure as the carb would be, so it still provides the desired fuel presure over and above the boost pressure. I have never tried it though, just seen it done. As far as I know it was only good for lower boost applications.

If you need a regulator let me know.

Re: Carbs and boost
 

bump for a question........

http://store.summitracing.com/partde...5&autoview=sku

would this work? The mustang carb has no fuel return so I was a bit confused. From what I understand, I put this in line with the fuel feed and give it a vaccuum line?

Re: Carbs and boost
 

Theres no boost reference port on it (the link you posted) . The one I sent you a link for is the least expensive one that will do the job... that why I bought it in the first place.

Re: Carbs and boost
 

I would put a TBI kit on it. Its exspensive but it will make the job a whole lot easier