I've been thinking about this and I don't undertand it...wouldn't the pressure just push it's way into the jets? And I keep hearing talk about a carb hat...wtf is that?

 

I posed the same question a few moths ago, from all the answers i got they said the biggest problem was tuning the fuel, other than that it's pretty much the same setup. There's a few guys with turbo'd carb engines in here.

 

Well I'm not thinking of doing it...it's just I don't understand how a carburator would operate under boost. Is there a special type or something?

 

Carbs work via something called the Bernoulli principle. You might want to pick up a physics book and look it up, as well as the word "venturi."

Carbs need a pressure differential. Pressure. "Vacuum" on one side and pressure on the other... whether atmosperic pressure or "boost pressure" makes no difference, unless the pressure differential exceeds the carb's specs... too big of a pressure difference and the carb can leak. Which carbs are a good design for a larger than normal pressure differential, or can be modified, is a source for endless discussion in some circles.

 

When you yooze carbs with a turbo, you can either go with a "draw thru" setup, where the terblo is between the carb and engine. This type of setup can work with no fuel pump or pressure regulator.

Or you can use a fuel pump to PRESSURIZE the fuel supply on a "blow thru" setup. With this kind of setup you would use a fuel pressure riser to keep the fuel pressure a few PSI higher than the boost so the gas doesnt get blown back from wense it came.

The blow thru setup is probably the one you are more familiar with if you know fuel injected car terblow setups. Draw thru is kinda old skool, and is not done much anymore.

Werd.

 

I was about to post up the same question, had been eating away at me for a while....

thanks

Blaze

 

ahhh I see now. Thanks