| Engine Block Heater ? [message #76066] |
Tue, 09 March 2010 06:38  |
millstuffs
Messages: 25
Registered: March 2006
Location: Norwich,New York 13815
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Would an Engine Block Heater help with a COLD starting problem during the Summer months ? Even if it were say 70 -80 degrees outside. What do you guys think ?
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| Re: Engine Block Heater ? [message #76128 is a reply to message #76066] |
Tue, 09 March 2010 15:46  |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
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Senior Member |
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When the quadrajet (as well as the rest of the fueling system)was designed, I don't think anyone was thinking that ethanol would be added to the gasoline. The main reason that we have a lot of percolating fuel is because the carb is sitting on a hot engine manifold. Even worse with the crossover heat source!
Carburated Porsches have a similar problem since the carbs are sitting directly on top of the cylinder heads, seperated only by a short, aluminum manifold. There are phenolic spacers that help the problem, but the best solution that most have found was to use a switched fuel pump that can be turned off a couple of blocks before you get to your destination. That pulls the fuel levels down in the float bowls so they don't percolate quite so much. Then simply turn the fuel pump on to refill the bowls with fresh gas before starting.
I think that the electric fuel pump is the easiest fix for this problem since we don't have a lot of other choices (other than converting to a closed system EFI, but that's another ball of wax).
George Rudawsky
Chicago, IL
75 Palm Beach
[Updated on: Tue, 09 March 2010 15:47] Report message to a moderator |
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| Re: [GMCnet] Engine Block Heater ? [message #76200 is a reply to message #76128] |
Tue, 09 March 2010 22:19 |
Terry Skinner
Messages: 379
Registered: January 2004
Karma: 0
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Senior Member |
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Why not reduce the temperature of the crossover?? that percolated fuel
is not just contaminating but a total waste of money, not to mention
it does not produce any power. I have blocked the cross-over and
removed the two forward mufflers and installed one muffler at the
back. There is no gas percolating out of my carburetor. It doesn't
smell like fuel in the cock pit on shut down. And that makes my wife
happy.
JTWIDI (just the way I did it)..............Terry
On Tue, Mar 9, 2010 at 1:46 PM, George Rudawsky <GeorgeRud@aol.com> wrote:
>
>
> When the quadrajet (as well as the rest of the fueling system)was designed, I don't think anyone was thinking that ethanol would be added to the gasoline. The main reason that we have a lot of purculating fuel is because the carb is sitting on a hot engine manifold. Even worse with the crossover heat source!
>
> Carburated Porsches have a similar problem since the carbs are sitting directly on top of the cylinder heads, seperated only by a short, aluminum manifold. There are phenolic spacers that help the problem, but the best solution that most have found was to use a switched fuel pump that can be turned off a couple of blocks before you get to your destination. That pulls the fuel levels down in the float bowls so they don't purculate quite so much. Then simply turn the fuel pump on to refill the bowls with fresh gas before starting.
>
> I think that the electric fuel pump is the easiest fix for this problem since we don't have a lot of other choices (other than converting to a closed system EFI, but that's another ball of wax).
> --
> George Rudawsky
> Chicago, IL
> 75 Palm Beach
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Terry Skinner
253-686-2624
Roy. Washington
'76 GMC
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