Technical Carb Spacer Question on my 53' Chevy SBC350

I would use the four hole gasket for best seal and also best fuel distribution in your street application. Hope this helps. Phil

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Will it be much peppier if I go with a wide open adaptor? Right now it feels ok for my driving needs and I just really cruise and I don't even drive it much, however I wouldn't mind having a peppier feel to take advantage of every now and then.

 

I would add the 4 hole gasket and leave the adapter alone. If you are happy with the way it runs then stop fixing it and drive it. If not I would find an aftermarket intake because by the time you try grinding or replacing the adapter you will have more time and money into it than it would take to change the intake with out improving power or drivabilty.

 

I talked with Edelbrock and the tech I spoke with said to get the 8723 half inch laminated wood spacer and use the four hole gaskets for the spacer and for the square to spread bore adaptor. He said he wasn't a fan of the heat isolation gasket Edelbrock carries and he likes the wood laminated one even over phenolic.

Its $35... i understand that money could go towards a different carb or intake but this seems like an easy enough thing to try that won't take me long. I want to mess with switching the carb or intake at a later time. I'm sure I have a heat soak issue, I smell really strong raw fuel after driving it and it sits in the garage and maybe it will help the harder start when hot. My SBC350 runs a little on the hotter side in stop and go traffic as well for a few different reasons (though never at the point of overheating)

 

I picked this up this summer for mine to help with fuel getting warm
https://www.summitracing.com/parts/mrg-97?seid=srese2&cm_mmc=pla-msn-_-shopping-_-srese2-_-mr-gasket

you probably wont see seat of the pants perofrmance gians from yours but if it does what its supposed to you're good

 

did you ever check to see if the carb is dripping/leaking inside?

 

Haven't been getting home early enough this week to drive it and check but I will do that regardless.

 

A couple of things to check with an Edelbrock carburetor:

1. Float level. I always open them up, new or not, and check. If you don't know that it has been set properly, then assume that it is not. I swear UPS uses a cannon when they ship these to me.

2. Fuel pressure. Edelbrock carburetors get pissy when pressure is over 5-1/2psi. I run a regulator set at 5psi. I have see stock fuel pumps hit 7psi. That can cause issues.

 

Thanks, I have a 5psi pump but I guess I'll add a 5 psi regulator to the list.

 

Do you think this regulator is any good? I can plug one of the outlets. Not sure if I can install it closer to the fuel pump which is moutned close to the tank externally. I don't want to run it in my engine compartment if I don't have to.



https://www.summitracing.com/parts/sum-g3032/overview/

 

I cannot speak to the quality. You will need a gauge in one of the OUT ports.

Pressure is pressure in a closed system. It can go anywhere in the system, however, as close to the carburetor as possible is best.

When the float drops, and flow goes into the bowl, it will cause a momentary pressure drop in the line between the regulator and the carburetor. This is when the system is effectively no longer closed. The longer the distance between the regulator and the carburetor, the longer the delay there will be in stabilizing the pressure in the line when the float rises, and the needle closes.

It probably unlikely that you will experience an issue due to this, but I cannot say for sure.

Why don't you want it in the engine compartment?

 

Thanks that makes sense regarding the fuel pressure delay stabilization when the flow goes into the bowl. I don't like the look of those especially with a gauge on there and it's another item I have to drill holes into the firewall and mount. I have steel line coming up from the passenger side along the firewall, then it goes to rubber into the carb but routed well away from exhaust and secured with clamps to the firewall.

 

Just out-of-sight should be fine. It's not like you are going to be flowing out the entire contents of the float bowl with that setup.

 

Your 2nd picture looks a lot like the factory q-jet gasket from the 70's. I ran an elderbrock carb on an o/t car and they hate too much fuel pressure. Had lots of problems until I added a fuel regulator. I love q-jets and I would run one if I was you. They are easy to tune and are fuel efficient as long as you keep your foot out of it. Good luck with your project.


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Thanks so much. I have a 5 psi rated pump but am going to get a regulator and put it out of sight somewhere just to rule out the pressure. I'll also get the wooden laminate spacer. I'll eventually get a q-jet carb or a different intake. The car never sees enough miles to where fuel efficiency makes a difference for me but will keep that in mind.