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Author
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Topic: Carb jetting?
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Ken&Shell
Gearhead Posts: 667
From: Mocksville, NC
Registered: May 2000
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posted 06-05-2001 08:46 AM
   
Anyone have a suggestion on the jettings for our carb. The 351W has a 750 Holley double pumper on it. Presently it has 71 in front and 83 in back. Squirters are 32's front and back. That must have been how it came from the store because we haven't made any changes. Anyway, the car was running way too lean for the last two races and been inconsistent as heck. Any recommendations.
A fellow racer suggested we go up two at a time, logging the results, and when the MPH begins to go backwards. To stop and back up one. That could take several passes at the track and they're calling for rain on thursday, our testntune day and I don;t want to race again Sat like it is without some change. Shell
ladyracer
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Moneymaker
Administrator Posts: 19686
From: Lyons, IL, USA
Registered: May 99
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posted 06-05-2001 10:19 AM
Put a 35 squirter in the front and up the primary jets to 75 Ken. That should get you in the ball park.  ------------------
Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link
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kid vishus
Gearhead Posts: 4357
From: middle of NC
Registered: Oct 2000
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posted 06-05-2001 10:27 AM
When you say "way too lean", do you mean that it is so lean it is popping and banging? or that it is just not consistent? Too rich is just as inconsistent as too lean. The only real way to tell is to check the plugs, make a pass and shut it off under power and pull a plug then and see how the color looks.
But if you are sure it too lean, I would go up 2 sizes in both the front and the back at the same time and see how it responds to that much change.
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capri man
Gearhead Posts: 3258
From: doerun, ga.
Registered: Nov 2000
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posted 06-05-2001 11:23 AM
hey ken and shell, listen to alex. he got my 700dp working perfectly.
good luck---mike r---capri man
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Ken&Shell
Gearhead Posts: 667
From: Mocksville, NC
Registered: May 2000
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posted 06-05-2001 08:36 PM
I always listen to Alex's advice. He didn't get where he is by not knowing a thing or two about carbs, and everything else tooThanks, Shell
ladyracer
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MrXerox
Gearhead Posts: 322
From: Oklahoma City, Oklahoma
Registered: Nov 2000
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posted 06-05-2001 09:15 PM
Who is Alex? 
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capri man
Gearhead Posts: 3258
From: doerun, ga.
Registered: Nov 2000
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posted 06-05-2001 09:39 PM
i dont know!! just sounded like a good name.
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Moneymaker
Administrator Posts: 19686
From: Lyons, IL, USA
Registered: May 99
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posted 06-05-2001 11:09 PM
Thanks guys.  I missed you all too!  ------------------
Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link
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