Re: Can I modify my early 4500 carb to air bleeds
[Re: Leigh]
#2854855
12/03/20 04:11 PM
12/03/20 04:11 PM
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Joined: May 2009
Posts: 511 Temperance, MI
68 HEMI GTS
mopar
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mopar
Joined: May 2009
Posts: 511
Temperance, MI
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Sure can. 8-32 set screw.
68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780# 69 Roadrunner 511 six pack 10.92 drive to track street car
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Re: Can I modify my early 4500 carb to air bleeds
[Re: 68 HEMI GTS]
#2854857
12/03/20 04:17 PM
12/03/20 04:17 PM
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Joined: Jan 2003
Posts: 14,496 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,496
So. Burlington, Vt.
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I did my first one a couple of years before the “HP” 4500’s came out.
If you wanted adjustable air bleeds in a 4500...... you had to modify a stock body.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Can I modify my early 4500 carb to air bleeds
[Re: DusTed74]
#2855035
12/03/20 11:37 PM
12/03/20 11:37 PM
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Joined: May 2009
Posts: 511 Temperance, MI
68 HEMI GTS
mopar
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mopar
Joined: May 2009
Posts: 511
Temperance, MI
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Man that carb looks great. What type of screw did you use on this?
Thanks. 8-32 x 3/32 brass set screw. They work and look great. Just drill to desired size with numbered drill bits.
Last edited by 68 HEMI GTS; 12/03/20 11:37 PM.
68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780# 69 Roadrunner 511 six pack 10.92 drive to track street car
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Re: Can I modify my early 4500 carb to air bleeds
[Re: DusTed74]
#2856641
12/07/20 03:53 PM
12/07/20 03:53 PM
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Joined: Dec 2014
Posts: 304 Florida
Mark Whitener
enthusiast
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enthusiast
Joined: Dec 2014
Posts: 304
Florida
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Yes, I do all the come thru my hands, plenty of material to tap 10-32, the outer two are fine with set screws. If you want to use regular bleeds you have to offset mill the hole before tapping to allow enough room for the heads. Otherwise you can use headed bleeds in one of the two, setscrews in the other. On two circuit conversions I may do that and just plug the outside with a set screw. 10-32 x 3/16 brass from McMaster-Carr, tap 5.5 turns with a bottoming tap you can also get from McMaster. I use a spiral flute tap, they eject the material better.
Mark Whitener [url=www.racingfuelsystems.com[/url]
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Re: Can I modify my early 4500 carb to air bleeds
[Re: Mark Whitener]
#2857131
12/08/20 03:32 PM
12/08/20 03:32 PM
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Joined: Sep 2003
Posts: 19,388 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,388
north of coder
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when tapping small holes in cast items like carb bodies, especially shallow threads, i like to use form [roll] taps. there is less chance of making the threads oversize with that type of tap. those are also available at mcmaster as well as other places. however, these taps require a [slightly] larger hole than cut taps, so check a chart to make sure you use the correct size drill.
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