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  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

Need new jets.

  • Thread starter Thread starter 66nightMARE
  • Start date Start date Sep 15, 2006
6

66nightMARE

New Member
Nov 26, 2004
97
0
0
Katy, Texas
Sep 15, 2006
#1
  • Sep 15, 2006
  • #1
The jets on my holley 600 are too big and I believe they are flooding my carb. Where is a good place to order smaller jets?
 

Cobain03

Active Member
Aug 27, 2003
996
0
36
Lexington, Ky
Sep 15, 2006
#2
  • Sep 15, 2006
  • #2
stock jets are 64s (mine was anyways). i put in a 71. ran real strong, but flooded. i went to advanced and bought a set of 68s to put in. 7 bucks. the whole kit is expensive. 50 bucks or so.
 

dennis112

15 Year Member
May 15, 2005
1,561
36
79
Amish Wonderland of Central PA.
Sep 16, 2006
#3
  • Sep 16, 2006
  • #3
Cobain03 said:
stock jets are 64s (mine was anyways). i put in a 71. ran real strong, but flooded. i went to advanced and bought a set of 68s to put in. 7 bucks. the whole kit is expensive. 50 bucks or so.
Click to expand...

Got my kit from Autozone-$40 and it was in stock.

I figured it was a better bang for my buck because I could move up and down in jet sizes until I find the optimum range.
 
D

D.Hearne

New Member
Sep 29, 2000
11,730
6
0
south louisiana
Sep 16, 2006
#4
  • Sep 16, 2006
  • #4
Advance, Autozone and O'Reillys all carry jet packs (2 per pack) in various sizes. What size is in there now, that makes you think they're too big? It could be another problem doing it. Actually it'd be more likely to be something else.
 
B

bnickel

Founding Member
Aug 21, 2002
5,640
3
77
lubbock, texas
Sep 16, 2006
#5
  • Sep 16, 2006
  • #5
D.Hearne said:
Advance, Autozone and O'Reillys all carry jet packs (2 per pack) in various sizes. What size is in there now, that makes you think they're too big? It could be another problem doing it. Actually it'd be more likely to be something else.
Click to expand...


i'd tend to agree here and i'd bet it's probably more like really high float settings that's causing the flooding
 
6

66nightMARE

New Member
Nov 26, 2004
97
0
0
Katy, Texas
Sep 16, 2006
#6
  • Sep 16, 2006
  • #6
Well, the previous owner put larger jets in there. Sometimes when the car is off, you can see gas slowly dripping out into the carb.
 
D

D.Hearne

New Member
Sep 29, 2000
11,730
6
0
south louisiana
Sep 16, 2006
#7
  • Sep 16, 2006
  • #7
If there's gas dripping into the carb, the floats are set too high or the needle/seats aren't sealing. Take a screw driver and reverse it in your hand and tap firmly on the needle adjuster screws with the handle. That will usually unstick the needle/seat or otherwise known as a stuck float. If that doesn't help, remove the sight plugs (right side of the bowls) and see if any fuel pours out, only a slight bit should seep out if the floats are adjusted correctly. Too much fuel pressure will also force the floats down and open the needle valves. It takes very little pressure and flow to feed a carb. I ran a low pressure/ 30 gal. per hour electric pump to feed a 400+hp 331 topped with 3 Holley 250 cfm carbs. Only time it was every insufficient was when the inline filter plugged between the tank and pump.
 

Max Power

Active Member
Jul 31, 2003
1,774
1
36
St Paul
Sep 16, 2006
#8
  • Sep 16, 2006
  • #8
As Hearne said, fuel dripping into the carb has nothing to do with jets.

Another thing that could cause that is a fuel pump that is not relieveing pressure properly after shut off.
 
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