| Re: [GMCnet] Quardrajet Cooling [message #94068] |
Sat, 31 July 2010 12:01  |
James Moore
Messages: 71
Registered: January 2004
Karma:
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Member |
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Carl,
I have one of the Mr Gasket heat dissipators on my GMC. I have never had anything that resembled vapor lock. I have driven the GMC from below sea level to over 9000 ft and when the temps were over 100F. Hottest temp I know of was 115F in Gila Bend, AZ when it was the hottest place in the US that day.
The only other modification is I removed the carb inlet filter. Hesitation on acceleration can be caused by mis-adjusted air valves, bad ignition module, timing advance not working.
I have mentioned the heat dissipator a couple of times on here but there has been no interest in it. Guess it is too simple/cheap and doesn't follow the "party line".
Jim Moore
75 PB which just traveled almost 3000 miles from WA state to middle GA with no vapor lock
Pinehurst, GA where temps are close to 100F
-----Original Message-----
>From: Carl Stouffer <carljr3b@yahoo.com>
>Sent: Jul 10, 2010 11:47 AM
>To: gmclist@temp.gmcnet.org
>Subject: [GMCnet] Quardrajet Cooling
>
>I have a Mr Gasket heat dissipater (86-B, 1/2") under my carb. There is no interference with the hatch cover. I don't really know if it helps prevent vapor lock or not, but I figure every little thing helps.
>
>When I first picked up the coach form the PO, in Phoenix, in late July, in 105+ degree temps, it had severe fuel starvation problems, especially after exiting the freeway and driving on surface streets. I thought to myself "what did I get myself in for?". To address this problem, I changed the carburetor inlet filter, installed the heat dissipater, and replaced the pump to carb fuel line with one of Jim B's shielded, braided steel lines. These mods took care of the majority of the problem and I only experienced a little of the same behavior on surface streets, when accelerating from a stop
> light.
>
>I have since replaced the radiator (aluminum), fan clutch, all the rubber fuel hoses, the tank selector valve, and I have blown out the fuel pick-up socks, added an additional in-line filter, and installed an electric booster pump and a cold air intake from the grille. I also painted the bottoms of the gas tanks white.
>
>Yesterday I took the coach down for it's annual emissions test (it passed easily, Yay!). It was a 30 mile + or - trip which included a few miles on I-10 at 60+ MPH, temps at about 100 degrees. It STILL had a slight fuel starvation problem, on aacceleration without the electric fuel pump on. The electric fuel pump, when turned on, completely eliminates the problem.
>
>Carl Stouffer
>'75 ex Palm Beach
>Tucson, AZ
>
>
>
>
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