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Holley Jet Sizes

  • Thread starter Thread starter chemeng
  • Start date Start date Mar 6, 2004
C

chemeng

New Member
Feb 21, 2004
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Louisville, KY
Mar 6, 2004
#1
  • Mar 6, 2004
  • #1
Hey everyone,

What jet size works best in the stock 289? Just got the car 3 weeks ago and am trying to tune the Holley 4160. Just rebuilt the carb and am running way too rich. Forgot to check the numbers on the current jets, another project for tomorrow.
Should I just buy the set and exchange them until I get a pair that works or buy the kit from Summit that allows you to adjust the jets externally?

Thanks, MikeR
 

rbohm

Founding Member
Apr 12, 2002
6,698
550
204
tucson,az
Mar 6, 2004
#2
  • Mar 6, 2004
  • #2
it seems to me that something like a 62 in the primary, and a 74 in the secondary should put you in the ballpark for a stock engine.
 
I

Ian70mustang

New Member
Mar 6, 2004
18
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0
San Diego
Mar 6, 2004
#3
  • Mar 6, 2004
  • #3
What cfm carb is it that will make a difference, also a 4160 doesnt have secondary jets.
 
C

chemeng

New Member
Feb 21, 2004
93
0
0
Louisville, KY
Mar 7, 2004
#4
  • Mar 7, 2004
  • #4
Thanks

Thanks guys, the 4160 I have is the standard 600 cfm model, a little oversized for the engine but I am trying to work with it (came with the car, hope to go to stock eventually but not in the budget this year). Just got the '65 fastback 3 weeks ago and am trying to get it on the road.

MikeR
 
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