stock 12A Racing Beat Holley 465 4bbl jet sizes?

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04-13-2006 | 07:57 PM

m1cah

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Joined: Mar 2006

Posts: 11

What size jets do the Racing Beat Holley 465cfm 4bbl for a non ported stock 12A use?

Thanks,

Micah

okarei@hotmail.com

04-15-2006 | 03:40 PM

phouvane

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Joined: Mar 2006

Posts: 3

main jet that i got from 465 cfm was 58, runs very good but seems reach, I replaced with 55 not much diff.

gas mileage sucks

04-15-2006 | 07:22 PM

m1cah

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Junior Member

Joined: Mar 2006

Posts: 11

Quote:

Originally Posted by phouvane' post='814099' date='Apr 15 2006, 11:40 AM

main jet that i got from 465 cfm was 58, runs very good but seems reach, I replaced with 55 not much diff.

gas mileage sucks

thankyou sir!

04-17-2006 | 07:25 PM

84stock

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Joined: Dec 2004

Posts: 58

The jets will vary depending on altitude. I know I rejet just going from spring to summer. If it seems rich it'll pop a bit at top end. You can improve gas mileage and lean it out a little safely by checking and changing your power valve. Most run a 6.5, which means when you drop below 6.5 inches of vacuum your primaries will be enriched for acceleration by approx 10 jet sizes. Change to a 3.5 and mileage will improve.