Heat Soak Solution?

[Custom/20]

Hello everyone. I'm having a little bit of a problem regarding heat soaking. It starts up perfectly in the morning when its cold and runs flawlessly during the day and will start back up immediately after I turn it off unless it sits for more than 10 minutes. I know its not the starter because it still will crank like normal. I know exactly what is happening but I'm not sure which spacer to use. I have a 1406 Edelbrock 600 cfm carburetor with a 2701 Edelbrock Performer intake manifold.

[jdalexa84]

I heard using a plastic spacer helps a good bit as well as using a electric fuel pump

[jdalexa84]

..

[jdalexa84]

This one is specifically made for heat soak and vapor lock: http://www.jegs.com/i/JEGS+Performan...MaoaAg948P8HAQ

[Custom/20]

Hi everyone. Thanks for the suggestions. I was looking on summit and found this and is exactly what I'm looking for. It appears that it will fit but I would like to get another opinion before I purchase it. Thanks! http://www.summitracing.com/parts/sum-g1412/overview/

[El Dorado Jim]

Originally Posted by Custom/20

Hi everyone. Thanks for the suggestions. I was looking on summit and found this and is exactly what I'm looking for. It appears that it will fit but I would like to get another opinion before I purchase it. Thanks! http://www.summitracing.com/parts/sum-g1412/overview/

yes, that is the right one, I have that one on my son's truck with the edelbrock carb.

[7tee]

I used a 1" Phenolic spacer and problem was solved...ed...

[geezer#99]

Originally Posted by Custom/20

Hello everyone. I'm having a little bit of a problem regarding heat soaking. It starts up perfectly in the morning when its cold and runs flawlessly during the day and will start back up immediately after I turn it off unless it sits for more than 10 minutes. I know its not the starter because it still will crank like normal. I know exactly what is happening but I'm not sure which spacer to use. I have a 1406 Edelbrock 600 cfm carburetor with a 2701 Edelbrock Performer intake manifold.

Are you sure it's heat soak?
THat's usually caused more by higher summer type temperatures.
At the normal 50F temp now you shouldn't have a problem.

The extra heat could be caused by retarded timing or a lean carb.
A spacer is always a good idea with an eddy carb.

[67 chevelle]

Do you have headers ?

[dazza]

Here's the one I bought from Summit recently, looks the same except the Summit one comes with a gasket and is more than half the price. Installed but haven't started truck yet... next week I hope.

Edelbrock 8711

[Custom/20]

Originally Posted by 67 chevelle

Do you have headers ?

No. It's all original except for the 1406 carb and 2701 intake.

[46stude]

Just saw another post here that I replied to, about the exact same type of problem. That same plastic spacer you linked to is what I run on my T-Bird.

Edelbrocks should come from the factory with at least a 1/2" spacer! LOL

Ambient air temp won't make much difference- unless it's really cold. The design of the carb lends itself to heat soak problems.

[toolboxchev]

Originally Posted by 46stude

Just saw another post here that I replied to, about the exact same type of problem. That same plastic spacer you linked to is what I run on my T-Bird.

Edelbrocks should come from the factory with at least a 1/2" spacer! LOL

Ambient air temp won't make much difference- unless it's really cold. The design of the carb lends itself to heat soak problems.

The design of the carb causing heat soak problem comment is interesting. How does this happen? Does it have a tendency to lean out the engine when hot?

I would be very interested in your insight, Thanks!

[46stude]

In comparison to a carb like a Holley 4V, among others, the location of the fuel bowls on the Edelbrocks have a tendency to absorb the heat coming off the engine. A Holley design has the bowls stuck out, away from the carb body (as well as hanging off front & rear center) & seemingly allows the bowls to "cool" better. With the Eddy bowls pulled in with the carb body and right in the middle of the intake, they just soak the heat up coming off the intake if it's right down on the manifold.

That's, of course, just an opinion. It was something pointed out to me, & it makes sense, but others might not agree.

[geezer#99]

Originally Posted by 46stude

In comparison to a carb like a Holley 4V, among others, the location of the fuel bowls on the Edelbrocks have a tendency to absorb the heat coming off the engine. A Holley design has the bowls stuck out, away from the carb body (as well as hanging off front & rear center) & seemingly allows the bowls to "cool" better. With the Eddy bowls pulled in with the carb body and right in the middle of the intake, they just soak the heat up coming off the intake if it's right down on the manifold.

That's, of course, just an opinion. It was something pointed out to me, & it makes sense, but others might not agree.

I agree with that.
And just to stir the pot a little, the fuel pressure problem on eddy carbs is from the dual floats with two needle/seats.
Curable with a fuel regulator or a properly sized fuel line.
Smaller fuel line is needed.
Quadrajets don't have much of a heat soak problem due to the centre float bowl. Area under the float is directly above the coolest part of the intake. Air/fuel thru the plenum cool it a bit.

[bean]

Same carb on my 305 was experiencing same problem. Advanced the time and runs great now

[toolboxchev]

Originally Posted by geezer#99

I agree with that.
And just to stir the pot a little, the fuel pressure problem on eddy carbs is from the dual floats with two needle/seats.
Curable with a fuel regulator or a properly sized fuel line.
Smaller fuel line is needed.
Quadrajets don't have much of a heat soak problem due to the centre float bowl. Area under the float is directly above the coolest part of the intake. Air/fuel thru the plenum cool it a bit.

Makes sense to me, mine starts hard after a long hot drive without letting it cool off a bit.