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  • #1

    Carb intakes

    The other day I was watching a video of a v8 engine that was setup with a turbo and a blow through carb. And it really got me thinking about it. I guess I never realized that carb engines could blow through and make massive hp numbers. How do you convince the afr to stay steady. For car shows, it's hard to find a cleaner engine bay than a carb car. How does one go about finding the right sized carb for blow through on a b motor. How common are the mating surfaces from carb to intake. Are there limitations to boost levels or provisions for adjustment with different air intake temps. ?

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    Last edited by bhearts; 03-03-2016, 09:53 PM.
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  • #2
    https://youtu.be/WDHV_18POQI


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    • #3
      The vdub guys run blow through carbs all the time on small engines. I would use something similar to what they run on a single carb blow through on an 1835 turbo beetle. Theastronaut probably has the carb you want in a pile of carbs under his bench. Lol
      Driving for me is neither a right nor a privilege. Driving is my passion, as it was for the people who invented the automobile, the people who paved the first roads and the people who continue to improve the automobile. Please respect this passion.

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      • #4
        Originally posted by Advancedynamix View Post
        The vdub guys run blow through carbs all the time on small engines. I would use something similar to what they run on a single carb blow through on an 1835 turbo beetle. Theastronaut probably has the carb you want in a pile of carbs under his bench. Lol
        How do they compensate temperature though.

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        • #5
          I think they just run them on the rich side and run an ignition that retards with boost. I've never set one of these up, but they are very common out here on sand buggies and VW drag cars. If you can do it on an air cooled engine then there is probably a lot more that can be done with a a water cooled engine. Personally, I'd just hide a simple speed density fuel injection and call it good. Microsquirt costs about what a single DCOE goes for these days.
          Driving for me is neither a right nor a privilege. Driving is my passion, as it was for the people who invented the automobile, the people who paved the first roads and the people who continue to improve the automobile. Please respect this passion.

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          • #6
            Does anyone here have experience with carbs? I'm curious how the fuel distribution is at low air flow levels.

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            • #7
              This winter I want to sit down with some extra time and make a one of a kind carb intake for a bp engine, because the bp lower intake would be perfect to work with for adapting a carburetor. But I'm curious if having the fuel too close to the intake runners will cause distribution problems at low flow. Too much fuel into the center 2 cylinders.

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              • #8
                Ive always imagined a carb jet fuel flow looking alot like a fuel injector, maybe more like a throttle body injection system.

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