Mixture Screw Length

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Jan 7, 2018 | 05:13 AM

#21

terrys6t8roadster

Melting Slicks

Joined: May 2012

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From: Allenton Wisconsin

I have a set of those in my jet collection box that came out of my 6210-3. Now running 64s. T

Jan 7, 2018 | 07:56 AM

#22

Cavu2u

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Joined: Oct 2013

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From: San Diego California

Quote:

Originally Posted by terrys6t8roadster

I have a set of those in my jet collection box that came out of my 6210-3. Now running 64s. T

That's the same model carburetor as this one Terry (6210-3, mfg date 0748). My guess would be a much better gas MPG is obtained with the little jets, but at what cost in performance? I stuck with the Holley Data Sheet spec and replaced mine with 83s (IF I'm reading that itty-bitty print correctly

).

Thanks.

Steve

P.S.: Yes, I read it wrong. 83s are for the Secondary circuit.

Last edited by Cavu2u; Jan 7, 2018 at 08:28 AM.

Jan 8, 2018 | 04:22 AM

#23

terrys6t8roadster

Melting Slicks

Joined: May 2012

Posts: 2,192

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From: Allenton Wisconsin

It was getting 21 mpg and didn't notice any performance loss until it picked up some dirt in carb. Then everything went to he--. An easy way to see if primary jets are to small is to drive in first gear 25 to 3000 rpm. If you feel surging in engine rpm increase jet size and retest until no more surging. T