heat isolator?

[RAT-AT-TACH]

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 .

[jimfulco]

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?

[ddsmith]

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.

[cdowns]

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

[Gotta71C20]

I think you should find a new mechanic. The one you have is an idiot. Larry