Tuesday, July 23, 2024

Motor Art

 




7 comments:

  1. Well doesn't that look like a giant pain in the ass to performance tune on a regular basis... : ) Still want, would run.

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  2. Having had a dual side draft Weber system on a BMW 2002, The only bitch was the first tuning session.* After that it was once a year balance that took all of 15 minutes including taking out the tools and putting them away. One of the secrets is to do a tune up first: plugs points and condenser and check the timing. Then the carb work.

    * You can change the fuel jets, air corrector and emulsion tubes in minutes. Knowing what they all do is the key. Read the 2 small Passini books on Webers. It will save a lot of grief.

    Spin Drift

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  3. I ran these on my BMW 1600 and Alfa. I just synced them with a hose to my ear. The trick is to run correct to small size chokes. The are easy to swap.

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    Replies
    1. I like the swappable choke feature too, you can really dial them in with that. I use a mercury stick to balance them, the motorcycle mechanics use them, hard to get multiple vac gauges that are accurate to each other.

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    2. PS,
      Another nifty trick, take a small number drill, close to the gap of you throttle plate to Venturi wall, use it like a spark plug gap gauge, adjust each plate so the drill shaft just drags out smoothly, and your pretty close, makes it easier to finer tune them then.

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  4. Fits a small block Chevy. I recognize it from seeing one on an engine, hard to forget, its a gorgeous looking piece of speed equipment. They run really really nice. Takes a bit of tuning but those side draft Webbers are simple to tune, you can even change the Venturi in them. I run one down draft version, on 71 beetlebug pretty nice carb. Lot less the cost of a Holley two bbl. Buddy of mine had this set up on a small block Chevy motor, which he put in a 65 Mustang. Last I heard he switched over to twin turbos. He gave me a death ride in it, it was a super quick car, those early Mustangs where pretty light weight, handle pretty swell too.

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  5. As a general rule, Webers don't make more HP than a single plane intake manifold and big Holley carb. However, for road racing, Webers did better with throttle response, and the float bowls handled the cornering/braking "G's" by never uncovering the main jets. Leading to faster lap times.

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