Carb Rebuild
Junior User
Joined: Sep 1999
Posts: 99
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Carb Rebuild
That seems very weird to me that an 86 doesnt need a cat. I thought all years from like 77 up had to have one. But sure you can put a cat on any vehicle, your motor may frown on it but the emission board should love it.
New User
Joined: Jun 1999
Posts: 15
Likes: 0
Carb Rebuild
> But sure you can put
>a cat on any vehicle, your
>motor may frown on it but
>the emission board should love it.
>
This motor is not going anywhere quick hauling this tank around. Does tow and motor up grade with no sweat though. Cat addition will be a last ditch effort.
Well I bought a Haynes manual to supercede the Chilton junk. Much more detail on the emission checks.
I'm still not pulling a good vacuum at idle though. The hard plastic vacuum pipes are a pain. I've had ro replace some already and they make me suspicious as to their condition where the eye can't see.
>a cat on any vehicle, your
>motor may frown on it but
>the emission board should love it.
>
This motor is not going anywhere quick hauling this tank around. Does tow and motor up grade with no sweat though. Cat addition will be a last ditch effort.
Well I bought a Haynes manual to supercede the Chilton junk. Much more detail on the emission checks.
I'm still not pulling a good vacuum at idle though. The hard plastic vacuum pipes are a pain. I've had ro replace some already and they make me suspicious as to their condition where the eye can't see.
Senior User
Joined: Jun 1999
Posts: 366
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From: saramento usa
Carb Rebuild
With the dual air pumps, you must have the F250?! Maybe the heavier duty trucks didn't require cats at that time. My son's '77 car even has a cat. Are you sure someone didn't cut it out of the exhaust system sometime? Anyway, the new cats don't cut very much out of the flow. They are not nearly as restrictive as the old cats.
The vacuum hoses that old are a real pain. Summitt sells a kit of hard plastic vacuum hoses that are color coded that may be the ticket. You really need to replace all vacuum hoses (and I know there are a ton of them) at this time to eliminate that possibility. You may also be getting a vacuum lead from a poor seal around the intake manifold.
Happy hunting,
Slik
The vacuum hoses that old are a real pain. Summitt sells a kit of hard plastic vacuum hoses that are color coded that may be the ticket. You really need to replace all vacuum hoses (and I know there are a ton of them) at this time to eliminate that possibility. You may also be getting a vacuum lead from a poor seal around the intake manifold.
Happy hunting,
Slik
Guest
Posts: n/a
Carb Rebuild
>With the dual air pumps, you must
>have the F250?!
Yes thats the model. Was a camper originally and is stickered non cat. I'll look into a cat perhaps.
>The vacuum hoses that old are a
>real pain. Summitt sells a
>kit of hard plastic vacuum hoses
>that are color coded that may
>be the ticket. You really
>need to replace all vacuum hoses
>(and I know there are a
>ton of them) at this time
>to eliminate that possibility>Happy hunting,
>Slik
Excellent lead Slik......
OFf to Summit.
GG
>have the F250?!
Yes thats the model. Was a camper originally and is stickered non cat. I'll look into a cat perhaps.
>The vacuum hoses that old are a
>real pain. Summitt sells a
>kit of hard plastic vacuum hoses
>that are color coded that may
>be the ticket. You really
>need to replace all vacuum hoses
>(and I know there are a
>ton of them) at this time
>to eliminate that possibility>Happy hunting,
>Slik
Excellent lead Slik......
OFf to Summit.
GG
New User
Joined: Jul 1999
Posts: 23
Likes: 0
Carb Rebuild
I have an 84 f250 that is factory non cat. That's because, back in 80's anyway, trucks rated over 8600 GVW didn't require them, so the heavy duty f-250's and larger trucks were this way. Here in MO trucks over 8600 GVW don't require The state emmissions testing.You could actually get away with any old engines in these trucks.
Senior User
Joined: Jun 1999
Posts: 366
Likes: 0
From: saramento usa
Carb Rebuild
I couldn't find the darn vacuum lines in any of the catalogs, but I know I saw them somewhere. I couldn't find my JC Whitney catalog, so they could possibly be in there. I'll keep looking. Could have been in an older catalog and is not listed in the new ones, but I'll let you know if I run across it.
Sorry about that,
Slik
Sorry about that,
Slik
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New User
Joined: Jan 2000
Posts: 7
Likes: 0
Carb Rebuild
This site is a great help. I too am in the midst of carb difficulties. I want to replace my Stock piece of junk carb on my 460 with a Carter AFB. I have an 85 F-350. I checked out the summit racing site and it appears that the proper carb is the CRT-9637 (I believe it is the 675 cfm with ford linkage and electronic choke). I also see that I might need the Carter AFB strip kit as well. Any comments about this. Am I on the right track.
Thanks
Thanks
Elder User
Joined: Sep 2000
Posts: 931
Likes: 0
From: Stanton, Suffolk England
Carb Rebuild
I had more problems with my Carter AFB and was not happy at all with the Edelbrock. Is there a secret to these carbs that I missed? I have always had good luck with the holleys and didn't really have the constant tinkering problems you mentioned.
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