I have a 1406 edelbrock carb on my stock manifold. i have the adapter that changes from the square bore carb to the spread bore intake. my fuel gets hot after a while and gets hard to start. it's not the starter. I'm positive already been through all that. it has a heat shield. my fuel lines are also wrapped. it will start boiling and you can hear it by the carb and the carb gets very hot. I need another adapter or spacers or something to cool the carb down but can't figure out what will work since I have to have the square/ spread bore adapter on. I don't have another inch under the hood so I can't just add another one on top of this adapter. If I got a Phenolic spacer that was square bore and grinned the edges to fit the spread bore would that work? I just can't find and adapter/spacer that's Phenolic or wood that will go from square bore to spread bore. would this work? http://store.summitracing.com/partde...?part=mrg-6009

 

The carburetor or starter has a heat shield?

I don't think that would be very effective. It still has the metal frame, and heat will be transferred through that. One of these http://store.summitracing.com/partde...5&autoview=sku or http://store.summitracing.com/partde...5&autoview=sku would be more effective (not sure the Holley shield will clear all Edelbrock carb parts, though).

Do you still have the EFE valve? Also called the heat riser. If so, is it stuck shut by chance?

Might be time to invest in an aftermarket intake that has the squarebore pattern.

 

You should look into getting a phenolic spacer. Basically its like plastic and plastic dosnt transfer heat well. I had a problem with that on my low profile dual 4 barrel manifold sounded like soda fizzing in my intake. Put on some phenolic spacer and all better. Now granted i dont know if they make a phenolic spacer that is also an adapter but something to look into.

 

thanks, I did finally find one at autozone that should work. I had to go to a different town to find one. If you're talking about the tube by the exhaust manifold it's not in use anymore. not sure if it's stuck in the close or open position. I have a heat shield on my starter.

 

How is your fuel line routed? It may be getting hot before it even gets to the carb, if its routed poorly. On the stock L69 and LG4 engines, they get very close to the exaust system right near the firewall if you've got a set of headers on it, and if its got the stock routing between the fuel pump and carb, it will run between the timing cover and water pump, where it also gets pretty toasty.

I had hot start issues with mine untill I changed the routing of the fuel line between the fuel pump and carb inlet, and haven't had a problem after that.

 

I may try that. I put the new adapter that helps keep heat from getting to the carb. the carb is cooler to the touch but the fuel still goes back down through the fuel filter and I hear it bubbling in the gas tank. It acts like a battery going dead when you try to start it. it chugs and tries to start and will if you give it some gas but not much. it only does this after about 30 minutes of driving. starts fine any other time and runs great. I do have a heat shield on my starter. I have stock exhaust manifold and the mechanic has the line running right in front of the carb, over on the valve cover under the a/c lines that get hot and right up against the block behind the alternator and water pump. i wrapped it with heat wrap the best I could but may still need to just reroute it. not sure if it makes a difference but the tube that use to run to the charcoal canister, which we don't have anymore, is just sitting there and I can see and hear fuel bubbling out of it a little.

 

Do you have any pics of your setup? Preferably without the air cleaner on?

Rerouting it may be the best option... you can also use aluminum tubing for the fuel line, like I did, which does also seem to help. I used aluminum tubing just because its easier to work with, but it doesn't get as warm as the steel stuff did either.

 

I'll post some this afternoon.

 

here's some I did get the car to start when hot just fuel is still leaving. no bubbling sound now.

 

You would be very wise to ditch the glass fuel filter - they have a nasty habit of spontaneously bursting and causing engine fires. Replace it with one with a metal shell, not plastic or glass. PLEASE!

 

thanks, I will do that when I go out to get one. I think it needs one anyway since it ahs been letting fuel back through.