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BlueBandit
 Post subject: Fuel Jet Help
PostPosted: Sat Feb 20, 2010 11:28 am 
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4 BBL ''Hyper-Pak''

Joined: Tue Apr 07, 2009 8:06 am
Posts: 37
Location: Lehi, Utah
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my carb is a 1945 holley and it has a #199 main jet. When I get it emissioned here in utah it is a little rich and won't pass. I was wondering what jet you would recomend to make it a little leaner since i can't find any numbers like the one on my jet to go off of.
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Aggressive Ted
 Post subject: 1945 jet sizes
PostPosted: Sat Feb 20, 2010 11:43 am 
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Supercharged
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Joined: Mon Jan 15, 2007 5:05 pm
Posts: 3767
Location: Black Diamond, WA
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That is the wrong #. If it were true that jet would be huge! In 1974 they came with a 612, jet a close tolerance 61. You could install a 60 all the way down to a 58 to lean it out.

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Aggressive Ted

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74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG
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SlantSixDan
 Post subject:
PostPosted: Sat Feb 20, 2010 12:03 pm 
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Joined: Thu Oct 31, 2002 5:39 pm
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Location: North America
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I wonder if that "199" is really an upside-down "661", which would be an enormous jet.

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BlueBandit
 Post subject:
PostPosted: Sat Feb 20, 2010 12:34 pm 
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4 BBL ''Hyper-Pak''

Joined: Tue Apr 07, 2009 8:06 am
Posts: 37
Location: Lehi, Utah
Car Model:
The #1 can't be upside down cause it looks just like this (1) not just a one.
I have done the HEI mod and 2 1/2 inch exhust but not much else. I am at an elevation of about 4500 feet. Can I try any of those jets as trial and error or does anyone have an educated guess as to which one I should start with. Appreciate all the help you guys give.
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SlantSixDan
 Post subject:
PostPosted: Sat Feb 20, 2010 12:37 pm 
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Joined: Thu Oct 31, 2002 5:39 pm
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Location: North America
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Well, start with a new #58 jet (you can't buy the 3-digit jets in the aftermarket) and see how you go with it. Or if the whole carburetor's questionable, install a better one.

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BlueBandit
 Post subject:
PostPosted: Sat Feb 20, 2010 12:46 pm 
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4 BBL ''Hyper-Pak''

Joined: Tue Apr 07, 2009 8:06 am
Posts: 37
Location: Lehi, Utah
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What Carbs would you recommend if I went with a new one
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SlantSixDan
 Post subject:
PostPosted: Sat Feb 20, 2010 1:00 pm 
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Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24805
Location: North America
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Send me a PM with full detail about your car and I'll see what I have in stock. Do not buy a "remanufactured" carburetor; they're junk.

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BlueBandit
 Post subject:
PostPosted: Mon Mar 29, 2010 3:20 pm 
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4 BBL ''Hyper-Pak''

Joined: Tue Apr 07, 2009 8:06 am
Posts: 37
Location: Lehi, Utah
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The Jet that had a 199 on it when measured was close to a 64. I put a 58 in it and it passed emissions perfectly. Thanks guys.
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DusterIdiot
 Post subject: Lol...
PostPosted: Mon Mar 29, 2010 6:14 pm 
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Joined: Tue Oct 29, 2002 8:27 pm
Posts: 9714
Location: Salem, OR
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Now that you have passed emissions...stick a #60 in it and drive it with some power...

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BlueBandit
 Post subject:
PostPosted: Tue Mar 30, 2010 6:33 am 
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4 BBL ''Hyper-Pak''

Joined: Tue Apr 07, 2009 8:06 am
Posts: 37
Location: Lehi, Utah
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I've already swapped it back over and I love this truck
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