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  Comparing Holley jets to Carter jet/rod combos?

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Author Topic:   Comparing Holley jets to Carter jet/rod combos?
oldmustangjunkie
Journeyman

Posts: 14
From:
Registered: Apr 2002

posted 10-17-2002 07:05 PM     Click Here to See the Profile for oldmustangjunkie   Click Here to Email oldmustangjunkie     Edit/Delete Message   Reply w/Quote
I found a magazine with my exact engine combo dynoed. It lists the Holley jet sizes, however I have a Carter. How can I convert the sizes? Would a Holley jet be equal to a Carter jet minus the rod size? I know everyone hates the peanut carb, but I'm stuck with it until I finish school (at least). On a related note--does a lean mixture at part throttle cause bucking/surging? Thanks

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65 Mustang: 5 speed, 3.73's, RAP Ported GT-40 Irons, xe258hr cam, Perf. RPM, 625 cfm Carter AFB, Jacobs ignition
66 Mustang: 289-2V, 3spd, Slipping Clutch, Bashed-up Front End

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Moneymaker
Administrator

Posts: 14914
From: Lyons, IL, USA
Registered: May 99

posted 10-17-2002 09:03 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
They do not compare at all. Totally different concept. What Jimmy carb do you have and what metering rods and jets do you have currently?

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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Fastymz
Moderator

Posts: 6421
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 10-17-2002 09:13 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
I gave up on trying to tune my Carter for a used rebuilt Holley.I cant say enough good things about it.The best under $100 investment I've made to my car yet.

SCOOP

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2.26 60'S
14.9 @ 90.86MPH

65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede.

https://mustangsandmore.com/ubb/Fastymz.html

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oldmustangjunkie
Journeyman

Posts: 14
From:
Registered: Apr 2002

posted 10-18-2002 01:54 AM     Click Here to See the Profile for oldmustangjunkie   Click Here to Email oldmustangjunkie     Edit/Delete Message   Reply w/Quote
I have a 625 cfm running stock jets and a slightly richer rod. I also put heavier secondary springs in because I have ~21" of vac at idle and more while cruising. I've just noticed that it surges at light/constant throttle and smells rich. I think it is running lean and the smell is from a lean misfire. Any opinions?

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Mpcoluv
Gearhead

Posts: 593
From: Charlotte NC usa
Registered: Apr 2001

posted 10-18-2002 06:38 AM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by oldmustangjunkie:
I have a 625 cfm running stock jets and a slightly richer rod. I also put heavier secondary springs in because I have ~21" of vac at idle and more while cruising. I've just noticed that it surges at light/constant throttle and smells rich. I think it is running lean and the smell is from a lean misfire. Any opinions?

21" of vacuum? You are really in need of a cam...


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BLstangin
Journeyman

Posts: 64
From:
Registered: Apr 2002

posted 10-18-2002 02:17 PM     Click Here to See the Profile for BLstangin   Click Here to Email BLstangin     Edit/Delete Message   Reply w/Quote
My car (302) has a 600 holley vaccum secondary carb on it, and it also surges at part throttle crusing, plugs look good, checked float bowl levels twice, right on the money, but yet it surges at part throttle, but it runs good anytime i accelerate, with no hesatation. Also if I shut it off there is gas that runs out of the secondary shafts onto the intake, but as soon as I start it , the gas evaporates and it stays dry until I shut it off again. Any Ideas?

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Moneymaker
Administrator

Posts: 14914
From: Lyons, IL, USA
Registered: May 99

posted 10-18-2002 02:34 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
What number jets and rods please?

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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oldmustangjunkie
Journeyman

Posts: 14
From:
Registered: Apr 2002

posted 10-18-2002 04:15 PM     Click Here to See the Profile for oldmustangjunkie   Click Here to Email oldmustangjunkie     Edit/Delete Message   Reply w/Quote
Main Jet-.100/Rods-.065x.047
Secondary Jet-.095

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BLstangin
Journeyman

Posts: 64
From:
Registered: Apr 2002

posted 10-18-2002 05:40 PM     Click Here to See the Profile for BLstangin   Click Here to Email BLstangin     Edit/Delete Message   Reply w/Quote
I'm running size 69 jets in the primaries Alex.

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oldmustangjunkie
Journeyman

Posts: 14
From:
Registered: Apr 2002

posted 10-21-2002 10:38 PM     Click Here to See the Profile for oldmustangjunkie   Click Here to Email oldmustangjunkie     Edit/Delete Message   Reply w/Quote
TTT

------------------
65 Mustang: 5 speed, 3.73's, RAP Ported GT-40 Irons, xe258hr cam, Perf. RPM, 625 cfm Carter AFB, Jacobs ignition
66 Mustang: 289-2V, 3spd, Slipping Clutch, Bashed-up Front End

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Moneymaker
Administrator

Posts: 14914
From: Lyons, IL, USA
Registered: May 99

posted 10-22-2002 06:53 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Oops, sorry I missed this one popping back up.
Would you be willing to buy a Carter peanut striping kit? Part number 10-205 is about $50 and contains several rods and jets. If yo already have some then I would try some .098 rods to start with .

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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Fastymz
Moderator

Posts: 6421
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 10-22-2002 07:06 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
Hey Mr,Alex is there any way you can tell me how my OLD carter jets compare to the holley I'm now using.

The carter was using
.101 pri jets
.098 sec,jets and a .098 rod.

The holley is now using
#67 pri
and 134-39 sec plate that= a number 69 jet.

Thanks SCOOP

------------------
2.26 60'S
14.9 @ 90.86MPH

65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede.

https://mustangsandmore.com/ubb/Fastymz.html

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oldmustangjunkie
Journeyman

Posts: 14
From:
Registered: Apr 2002

posted 10-22-2002 08:09 PM     Click Here to See the Profile for oldmustangjunkie   Click Here to Email oldmustangjunkie     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Moneymaker:
Would you be willing to buy a Carter peanut striping kit? Part number 10-205 is about $50 and contains several rods and jets. If yo already have some then I would try some .098 rods to start with .


.098 rods? 1st or 2nd step? I have strip kit 10-201. Won't a .098 rod almost close up a .100 jet? I'm confused.

[This message has been edited by oldmustangjunkie (edited 10-22-2002).]

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