Metering Rod Spring Kit for Carter AFB - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1967LWBstepside · 08-27-2002, 04:14 PM

I have a Carter AFB 500 cfm carb on my 250. It's running a bit too rich. Is there anyway to change the jets on a Carter or do I need to get a metering rod spring kit and use trial and error until I get a good match for this engine?

The metering rod spring kit is found at Summit Racing http://store.summitracing.com/defaul...rchType%3DBoth but I've never done this before. Is there anything else I should do to lean the carb down?

Thanks.

tom hand · 08-27-2002, 04:25 PM

I wouldn't think you need to change the springs unless you are running a big cam that reduces the vacuum. If it is just running rich you might can fix that just by changing the metering rods without taking the top off the carb. I see you are in Starkville, went thru there last weekend for the bike rally in Sturgis.

jku72 · 08-27-2002, 05:31 PM

Carter AFB's are such a sinch to change metering rods, if you have 5 minutes, you can lean that bad boy down. So simple it is scary.

1967LWBstepside · 08-27-2002, 05:44 PM

Do I have to take the top off the carb to get to the metering rods? I'm sure this is a stupid questions. Also, any size recommendations?

Thanks.

bobs409 · 08-28-2002, 07:38 AM

On the top of the carb there are 2 small plates held with 1 tiny screw for each. Remove the screw and plate and pull the metering rod out.

For fine tuning, a different spring will work. For more fo a change, a different rod can be used. To make a major change, the jets may need to be swapped.

I bought one of the strip kits from Summit and you'll be lucky if you use 2 pieces out of the whole thing but... This kit contains an assortment of metering rods and jets only. No springs.

In most cases, the springs or rods will do the trick.

tom hand · 08-28-2002, 09:29 AM

Tech Tip: DO NOT remove the screws when changing metering rods. They are way too easy to drop into the carb. Loosen them just enought to spin the little plates out of the way.

1967LWBstepside · 08-28-2002, 08:42 PM

Thanks, Men, for all the good advice. Once I find the parts I should have her leaned down a bit. Can hardly wait . . .

Mike

08-27-2002, 04:14 PM	#1
1967LWBstepside 'Heavy Metal' Redefined. Join Date: Mar 2001 Location: Starkville, MS, USA Posts: 107	Metering Rod Spring Kit for Carter AFB I have a Carter AFB 500 cfm carb on my 250. It's running a bit too rich. Is there anyway to change the jets on a Carter or do I need to get a metering rod spring kit and use trial and error until I get a good match for this engine? The metering rod spring kit is found at Summit Racing http://store.summitracing.com/defaul...rchType%3DBoth but I've never done this before. Is there anything else I should do to lean the carb down? Thanks. __________________ 1967 C10 LWB stepside, 250 engine, GM HEI, aftermarket A/C., Clifford Performance intake, Stovebolt split headers, Carter AFB 500, X-pipe & Dynomax Super Turbos, 1 piece custom driveshaft, cyprus bed wood & stainless bed strips. Starkville, Mississippi \| My Truck Page

08-27-2002, 04:25 PM	#2
tom hand CCRider Join Date: Feb 2000 Location: Olive Branch,MS,USA Posts: 2,232	I wouldn't think you need to change the springs unless you are running a big cam that reduces the vacuum. If it is just running rich you might can fix that just by changing the metering rods without taking the top off the carb. I see you are in Starkville, went thru there last weekend for the bike rally in Sturgis. __________________ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS

08-27-2002, 05:31 PM	#3
jku72 Registered User Join Date: Jan 2002 Location: cornville, maine Posts: 659	Carter AFB's are such a sinch to change metering rods, if you have 5 minutes, you can lean that bad boy down. So simple it is scary. __________________ jku Cornville, Maine 68 C10 burb 42 Willys MB 46 Dodge WF-32 1.5 ton 53 & 56 Olds' 60 Cadillac 22 Dodge Brothers

08-27-2002, 05:44 PM	#4
1967LWBstepside 'Heavy Metal' Redefined. Join Date: Mar 2001 Location: Starkville, MS, USA Posts: 107	Do I have to take the top off the carb to get to the metering rods? I'm sure this is a stupid questions. Also, any size recommendations? Thanks. __________________ 1967 C10 LWB stepside, 250 engine, GM HEI, aftermarket A/C., Clifford Performance intake, Stovebolt split headers, Carter AFB 500, X-pipe & Dynomax Super Turbos, 1 piece custom driveshaft, cyprus bed wood & stainless bed strips. Starkville, Mississippi \| My Truck Page

08-28-2002, 07:38 AM	#5
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	On the top of the carb there are 2 small plates held with 1 tiny screw for each. Remove the screw and plate and pull the metering rod out. For fine tuning, a different spring will work. For more fo a change, a different rod can be used. To make a major change, the jets may need to be swapped. I bought one of the strip kits from Summit and you'll be lucky if you use 2 pieces out of the whole thing but... This kit contains an assortment of metering rods and jets only. No springs. In most cases, the springs or rods will do the trick. __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

08-28-2002, 09:29 AM	#6
tom hand CCRider Join Date: Feb 2000 Location: Olive Branch,MS,USA Posts: 2,232	Tech Tip: DO NOT remove the screws when changing metering rods. They are way too easy to drop into the carb. Loosen them just enought to spin the little plates out of the way. __________________ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS

08-28-2002, 08:42 PM	#7
1967LWBstepside 'Heavy Metal' Redefined. Join Date: Mar 2001 Location: Starkville, MS, USA Posts: 107	Thanks, Men, for all the good advice. Once I find the parts I should have her leaned down a bit. Can hardly wait . . . Mike __________________ 1967 C10 LWB stepside, 250 engine, GM HEI, aftermarket A/C., Clifford Performance intake, Stovebolt split headers, Carter AFB 500, X-pipe & Dynomax Super Turbos, 1 piece custom driveshaft, cyprus bed wood & stainless bed strips. Starkville, Mississippi \| My Truck Page



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