anyone have problems with carb. freezing?
Thread Starter
Le Mans Master
Joined: Jul 2001
Posts: 9,622
Likes: 16
From: absecon nj
anyone have problems with carb. freezing?
only on the very cold mornings the carb. freezes but on nice warm days like sat. sunday and monday it was fine..so tonight i made a plate that fits nicely between the air cleaner base and the lid and then a heat tube coming off of that to the center header tubes....hopefully to transfer enough heat to the carb. to help out...it all started after i put the rpm air gap intake on and the 14x4 k and n aircleaner..now the carb. stays too cold and it freezes the fuel before the motor gets up to temp. after that shes fine.anybody else experience this?ill post picture if the homepages ever get back up..looks actually pretty good. :D
Safety Car
Joined: Aug 2000
Posts: 3,909
Likes: 26
From: Clymer PA
Re: anyone have problems with carb. freezing? (pats406nitrovette)
I can't say I've ever experienced that....but then again if it is around freezing, the 'Vette usually isn't out anyway. Let's see those pictures :yesnod:
Burning Brakes
Joined: May 2001
Posts: 1,102
Likes: 0
From: spring city pa
Re: anyone have problems with carb. freezing? (pats406nitrovette)
It is a pretty common problem when the atmosphere is just right .In fact it does not have to be below the freezing point to experience this problem .
In the last few days we have had the right temp&humidity for it to rear its ugly head . When the air passes the throttle plates and undergoes the rapid pressure drop you get a matching temp drop right at the throttle plates. This causes the idle problems you experienced and that is why the factory put the snorkels and heat tubing on the air cleaners . The icing occurs right where the throttles plates are and the air gap manifold will not cause it . But at the same time it will take longer for the problem to go away
as the manifold will not get warm as quickly as a regular one .
G
PS hello from pennsy
Thread Starter
Le Mans Master
Joined: Jul 2001
Posts: 9,622
Likes: 16
From: absecon nj
Re: anyone have problems with carb. freezing? (ram82fire)
thanks for the reply thats exactly whats happening..and your right it takes a little longer now to warm up and idle better then with old performer intake...
Pro
Joined: Aug 2000
Posts: 610
Likes: 168
From: Vancouver B.C.
Re: anyone have problems with carb. freezing? (Steve Straus)
I had this same problem years ago on a Camaro when I blocked the "exhaust crossover" passage. Blocking the passage adds a few more HP, but I would get the freezing on cold humid mornings during winter.
Personally, I found it to be a major pain. I would let it run a few minutes, then shut it down for a few, I guess warm air would come back up thru the intake and warm the carb base. I really hated driving it idling that high until it warmed up.
Eventually, I changed the intake gaskets, and left the exhaust crossover openings unblocked. Problem fixed. I see you are running an Air Gap, I don't know if that manifold has a crossover provision that warms the manifold under the carb, if it does and your heads have the crossovers, try and remember if you blocked the passages on the gaskets, this might be your problem. On the other hand if the freezing is no big deal to you- just leave it.
Dino.
Personally, I found it to be a major pain. I would let it run a few minutes, then shut it down for a few, I guess warm air would come back up thru the intake and warm the carb base. I really hated driving it idling that high until it warmed up.
Eventually, I changed the intake gaskets, and left the exhaust crossover openings unblocked. Problem fixed. I see you are running an Air Gap, I don't know if that manifold has a crossover provision that warms the manifold under the carb, if it does and your heads have the crossovers, try and remember if you blocked the passages on the gaskets, this might be your problem. On the other hand if the freezing is no big deal to you- just leave it.
Dino.
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Thread Starter
Le Mans Master
Joined: Jul 2001
Posts: 9,622
Likes: 16
From: absecon nj
Re: anyone have problems with carb. freezing? (Dino_'72)
the heads have them already blocked and the intake doesnt have it at all.....and its becoming a major pain in the butt.
Le Mans Master
Joined: Feb 2001
Posts: 8,017
Likes: 2
From: The problem is all inside your head she said to me.
Re: anyone have problems with carb. freezing? (pats406nitrovette)
The conditions for this to be "right" must happen much more with boat engines. I had a borrowed 20 hp Merc and the throat of the carb would almost close with frost. Of course we usually went out in the winter. I think my 82 Z did it on occasion too. Let's see the pictures.
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
Re: anyone have problems with carb. freezing? (pats406nitrovette)
You're not going to like hearing this since it may seem like a radical solution, but here goes anyway. Ford, in the sixties, used an under-carb spacer that has an engine coolant passage through it. It routed the coolant from the heater hose. It's purpose was two-fold; 1) When the atmospheric conditions were ripe, it would prevent carb icing by heating the carb's base. 2) It served as a heat-sink when the engine was hot to prevent vapor lock and carb boil-over.
I had one on my Fairlane and it worked quite well. In fact, when I removed it following a manifold replacement I got icing on those chilly, damp mornings and vapor-lock on the hot summers idling in traffic. It would be easy to retrofit one to any square-bore carb since it is just a .5" four-hole aluminum spacer with two heater hose fittings on it.
If you're so provincial that you can't even think of using a Ford part on your Corvette to solve a problem, well just forget it. I don't need a snoot full of Elmo, or whatever his name is, peeing on a blue oval. My philosophy is that if something works, you go with it.
I had one on my Fairlane and it worked quite well. In fact, when I removed it following a manifold replacement I got icing on those chilly, damp mornings and vapor-lock on the hot summers idling in traffic. It would be easy to retrofit one to any square-bore carb since it is just a .5" four-hole aluminum spacer with two heater hose fittings on it.
If you're so provincial that you can't even think of using a Ford part on your Corvette to solve a problem, well just forget it. I don't need a snoot full of Elmo, or whatever his name is, peeing on a blue oval. My philosophy is that if something works, you go with it.
