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September 2021
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  #1 (permalink)  
Old 03-23-2021, 07:15 PM
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Default Updating Carbs

pulled the old Edlebrock carbs off which had parts missing from the linkage and replacing with the new AVS2 series carbs. Also went with 1 electric choke on the rear carb. just a bit more wiring and attach fuel lines, then to tune. last picture was the old carbs before I pulled.
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Old 03-23-2021, 08:00 PM
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Nice, Did you use the 1903 Elec and 1904 manual carb? Have you started tuning yet. Are you using plug readings or AFR?
I have been considering two of the 1902 manuals and just detuning the jets and rods to the 1903/04 specs IF they're a good starting point.
Thank you for any info.
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Old 03-24-2021, 04:50 AM
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yes, those are the ones. I have the complete tuning kit as well. will first tune by the seat of the pants method, then plugs. eventually will afr tune
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Old 03-24-2021, 06:02 AM
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Thanks,
I'm still kicking the idea around. If so I'll go the the Price Motorsport intake flat milled version. I typically do these type mods when I run low on the necessary mods. (necessary in my brain)
If I do it will be my fourth carb, (not counting the EFI adventure), third intake.
The car will never be done...

https://www.pricemotorsport.com/html...4__intake.html

Last edited by spdbrake; 03-24-2021 at 06:08 AM..
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Old 05-15-2021, 01:37 PM
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Carbs are great, looking for someone to dial in jetting in Michigan. Prefer dyno tuning
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Old 06-16-2021, 03:17 AM
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Ok, had car calibrated. Steady speed at all RPMs were at a steady 12.5, but when WOT it goes rich. Has .077 secondaries and I did not have any smaller ones to try. I have ordered and assortment of secondary jets to try a few steps smaller to see what results I get. Car runs great overall and starts and pulls hard, other than being Fat WOT. Secondaries vacuum butterflies are opening, had to lighten the springs to allow them to operate. Any suggestions on what Secondary jetting to try first, AFR is at 11.4 at WOT. I have ordered .075,.074,.072,.070

Attached WOT dyno graph, you can see it goes fat quickly. but power for the little 302 is decent as is the torque.
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Old 06-16-2021, 04:34 AM
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Great progress and thanks for posting the info so far.


The Edelbrock tuning guide is pretty accurate. See pages 33-34 for yours.
https://edelbrock-instructions-v1.s3...ning-guide.pdf

The guide shows your secondary jets are already .77 and your not far off a good WOT AFR as it is. So I'd start with the .75

https://help.summitracing.com/app/an...2Ffuel-mixture
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Old 06-16-2021, 09:10 AM
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Had to order jets for a Carter AFB series as they will work in Edelbrock.. edlebrock only sells 77 as their smallest....
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Old 06-19-2021, 08:49 PM
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Great info. I'm about to top off my engine build with the same setup. Looks like really good numbers. Curious what cam and compression are you running?
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Old 06-20-2021, 03:12 AM
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Actually no idea on cam or compression, bought car and previous owner knew nothing about car, has Y 302 Heads with F3ZM6049 casting on heads
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