07-17-2003, 12:26 AM | #1 |
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Join Date: May 2003
Location: shawnigan lake b.c. canada
Posts: 287
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heat isolator?
i just had my burb tuned up yester day ,and she started pinging,i took it back today and the mec put the timing light on it and brought it in a touch,then he tested the temp in my float bowl(edelbrock ps 800) which was at 110-115 he said it should be no more than 85, so im just burning my fuel into vapor at such a high temp,im going to be putting a heat isolator on the carb tomorro to keep it cool then he will be able to tune the timing in better.
does this sound right to anyone? i should mention the motor is a modified 402 bb . |
07-18-2003, 04:13 AM | #2 |
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Join Date: May 2003
Location: Shreveport LA
Posts: 3,170
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If the temp should not be more than 85, then what temp is it when it's 95* outside & the truck has been outside for years but it runs fine?
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07-18-2003, 11:54 AM | #3 |
Glowing since 1978
Join Date: Mar 2001
Location: Lusby,MD,USA
Posts: 532
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I do agree that a hot carb is a bad thing but I don't think those temps make sense. The old vettes had a heat insulator and a sheet metal plate that mounted under the carb to keep radiant heat off the carb float bowls. You could probably fashion a similar heat shield if you felt it would help. It seems to me that the truck would just run a little rich when hot outside or in stop and go traffic. The big thing that I see as a problem is the percolation out the carb vents when you stop the engine after running it on a hot day. The vapor bubbles carry raw gas up and out the vents and into the intake. This in turn create a big PITA for starting and potentially shortens engine life if raw gas washes the cylinder walls down for you.
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07-18-2003, 03:55 PM | #4 |
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Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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i think a heat isolator is a good thing to use in fact i'm pretty sure edelbrock reccomens using one why they dont include one with their carbs stumps me
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07-18-2003, 04:32 PM | #5 |
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Location: Belfair, Wa. USA
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I think you should find a new mechanic. The one you have is an idiot. Larry
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