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Quadrajet Carb Talk and Tips / Re: Saw this on facespook market place
« Last post by 73ss on Today at 02:33:20 PM »
Just an idiot. 1970 Pontiac carb didn't start with 1708 numbers. Pontiac had front inlet, etc etc. Looks like a hacked up marine carb. He's about $1749.50 overpriced. LOL
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Dialing in your rebuilt Quadrajet carburetor / Re: Adjusting Secondary Air Flaps
« Last post by jagness on Today at 08:32:59 AM »
Okay, good to know. It’s not easy to compare them to each other with my calipers.
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Dialing in your rebuilt Quadrajet carburetor / Re: Adjusting Secondary Air Flaps
« Last post by novadude on Today at 06:11:10 AM »
The CC rods are fatter on the upper portion which would make it leaner when the air door is not fully open (before you get to the power tip).  I think the CE rods are probably a better choice.
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Dialing in your rebuilt Quadrajet carburetor / Re: Adjusting Secondary Air Flaps
« Last post by jagness on September 30, 2025, 02:35:11 PM »
novadude, the CV rods were definitely not right for this engine. I put CEs in it, and it was noticeably better right away. Then I started adjusting the spring. 3/4 was better than 1 turn. 1/2 turn was even better. I tried 1/4 turn, but I think the sweet spot might be about 3/8 turn. I’ll keep playing with it, but I’m definitely in the ballpark now.

I have a pair of CC rods too. I wonder if they’d be too rich. Any thoughts on that?
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Diagnose a Quadrajet carburetor problem / Re: Lets talk timing
« Last post by Ponchonutty on September 30, 2025, 06:42:55 AM »
Quote from: lightning boy on September 26, 2025, 12:56:14 PM
Guys, I think this is great. Most people on this forum are your hardcore type hobbyist. Younger folks getting into the game are clueless. Heck, most of your older car guys just get a motor, start it up and set it at 8 or 10* and it's good to go. How many times have you heard "I could never get it to run right, that's why I went to fuel injection, best thing I ever did."  however, young guys like phone apps and they can understand the timing curve eventually. To get someone to understand timing tape, piston stops, timing gun, weights, springs, vacuum adv. is just too much. They just want to drive em.

Even with the older folks such as myself I think it would be a great tuning aid in that it would make it quicker to adjust vs. the old way.  Price is a little steep especially if you want to use any power adders but other than that, seems like a solid piece
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Dialing in your rebuilt Quadrajet carburetor / Re: APT adjustment screw adjust to smaller or larger jet sizes
« Last post by quadrajam on September 29, 2025, 02:34:24 PM »
  Power piston spring could be weak.Get a new spring and put the 73 jet back.

I assume you've double checked the acc pump function and proper hanger arm
geometry as previously posted....??

QJ
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Dialing in your rebuilt Quadrajet carburetor / Re: APT adjustment screw adjust to smaller or larger jet sizes
« Last post by lightning boy on September 29, 2025, 01:15:24 PM »
IF it runs well at 5 turns that's not too much.
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Quadrajet Carb Talk and Tips / Saw this on facespook market place
« Last post by GSP7 on September 29, 2025, 09:45:42 AM »
Most local hillbilly stuff on facespook marketplace is way overpriced

Posting for fun ... Opinions on price / value or is it a scam  ;D ;D

Not mine ,  8) :o


https://www.facebook.com/marketplace/item/24285956624436523/?ref=browse_tab&referral_code=marketplace_general&referral_story_type=general&tracking=%7B%22qid%22%3A%22-8238383752344326747%22%2C%22mf_story_key%22%3A%225264625576772107569%22%2C%22top_level_post_id%22%3A%225264625576772107569%22%2C%22commerce_rank_obj%22%3A%22%7B%5C%22target_id%5C%22%3A5264625576772107569%2C%5C%22target_type%5C%22%3A6%2C%5C%22primary_position%5C%22%3A45%2C%5C%22ranking_signature%5C%22%3A4879618410073998759%2C%5C%22commerce_channel%5C%22%3A501%2C%5C%22value%5C%22%3A0.00026513973838458%2C%5C%22upsell_type%5C%22%3A3523%2C%5C%22candidate_retrieval_source_map%5C%22%3A%7B%5C%2225525222280400814%5C%22%3A3131%2C%5C%2224593632733638080%5C%22%3A626%2C%5C%2224867654739539218%5C%22%3A3131%7D%2C%5C%22grouping_info%5C%22%3Anull%7D%22%2C%22lightning_feed_qid%22%3A%22-8238413301779354140%22%2C%22lightning_feed_ranking_signature%22%3A%224879618410073998759%22%7D
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Dialing in your rebuilt Quadrajet carburetor / Re: Adjusting Secondary Air Flaps
« Last post by jagness on September 29, 2025, 08:48:14 AM »
You’re right! According to the chart in Cliff’s book, CVs are .0527. So I don’t know why my specs say .0410. I just looked through my collection of secondary metering rods and found a couple pairs of CEs, which are actually .0410. I’ll give those a try. Thanks for pointing that out!
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Dialing in your rebuilt Quadrajet carburetor / Re: APT adjustment screw adjust to smaller or larger jet sizes
« Last post by GSP7 on September 29, 2025, 08:01:01 AM »
Quote from: novadude on September 23, 2025, 05:21:39 AM
I wouldn't worry about 5 turns.  In my experience, 3 turns +/- 2 turns is in the range if the jets and metering rods are right.  If the tip-in test does nothing, it may be rich.  I wonder if your problem might be elsewhere?  Does the accelerator pump give a shot of fuel with a small amount of throttle movement?

Im now at 5 - 4 1/2 turns and seems like the bog is gone. I only drive the truck once in awhile and have to go down a hill 2 1/2 miles leaving my house to test on flat road or back up the hill

I had cranked the APT all the way up to 7 to get rid of the bog then back it down bit by bit and test drove. over many days.... was down to 3 1/2 and thought the bog was gone, nope. Now im at 4 1/2  from 5 . I'll do several more test drive to see if the bog/hesitation is stiil gone or not



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