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04-25-2012, 03:46 PM
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CC Member
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Join Date: May 2006
Location: Portland,
OR
Cobra Make, Engine: ERA FIA, 1964 289->Webers
Posts: 3,689
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48 IDA Weber Idle Jet Holder Sizing
I know I knew this at one point & now I've forgotten... I'm trying to write down, again, what I had done with my Jetting before my computer died & took the info with it. I pulled my jets to write everything down again. The only piece of info I don't have now is the sizing on my Idle jet holders. I know I soldered them, they were 120. I have a set of 100's on the shelf so I'm assuming they are set at 110. How do I check this?
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ERA FIA 2088
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04-25-2012, 04:22 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
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Did you have them in the chart that is here on the site???
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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04-25-2012, 04:59 PM
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Join Date: May 2006
Location: Portland,
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Cobra Make, Engine: ERA FIA, 1964 289->Webers
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Yes, but I changed some things since then
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04-25-2012, 05:07 PM
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Join Date: May 2001
Location: California,
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Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
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If you have a set of drills, use them to verify existing hole size.
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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04-26-2012, 12:54 AM
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Join Date: May 2008
Location: Brisbane,
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Quote:
Originally Posted by *13*
I know I knew this at one point & now I've forgotten... I'm trying to write down, again, what I had done with my Jetting before my computer died & took the info with it. I pulled my jets to write everything down again. The only piece of info I don't have now is the sizing on my Idle jet holders. I know I soldered them, they were 120. I have a set of 100's on the shelf so I'm assuming they are set at 110. How do I check this?
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So they were 1.20mm and you soldered them but you remember how you made them between 1.00 and 1.20?
Buy a metric drill set from 0.3mm to 2.00mm.
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Gary
Gold Certified Holden Technician
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04-26-2012, 03:36 AM
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Join Date: May 2006
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I guess my question is "are the two holes on a 120 holder .60mm each?". I soldered one shut, so I'm assuming that I drilled the existing to 1.1mm. I'll check it today.
EDIT: That must have been it. One Hole Plugged, the other measuring 1.10mm, making it a 110 Holder.
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Last edited by *13*; 04-26-2012 at 06:14 AM..
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04-27-2012, 12:34 PM
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CC Member
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Join Date: May 2001
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Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
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Hyde: The 120's that I had only had 1 hole. The surface area of 2 @ .60 mm is less than 1 @ 1.20 mm. It would be richer with the 2 holes.
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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04-27-2012, 02:09 PM
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I can't remember what they were. But I did solder one hole & the other is at 1.10mm & running smooth with nicely colored plugs.
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04-27-2012, 06:50 PM
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An IDA's idle holder can be 0.6mm, 1.00mm or 1.20mm.
If you had two holes, they must have been originally 0.6mm.
Two holes of .6 gives about .85mm, still smaller than 1.00mm.
For the record, 4 x .6mm holes = 1 x 1.20mm.
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Gary
Gold Certified Holden Technician
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04-28-2012, 02:23 AM
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Ok, back to the original question. If you have a 120 holder & you want to make it a 110, how do you drill & solder it?
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04-28-2012, 02:42 AM
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I would solder the 1.20 hole and drill a new 1.10 hole.
A new hole in brass will be more accurate than a 1.10 hole through a soldered 1.20 hole.
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Gary
Gold Certified Holden Technician
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04-28-2012, 03:47 AM
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Join Date: May 2006
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That is what I have now. Seems to be running well.
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04-28-2012, 06:38 AM
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Join Date: May 2001
Location: California,
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I can't remember what they were. But I did solder one hole & the other is at 1.10mm & running smooth with nicely colored plugs.
???
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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