Cure my hotstart issue?..318/Edelbrock 1406

[Ski 61701]

Jordan, looking at the pic of your carb / intake it looks as if you are running an oem intake manifold. With that being said you might need to get a conversion style carb spacer to go from thermoquad base to afb carb base. So before you go buying stuff take a good close look at the bolt spacing on the existing carb and make sure the bolts are all equidistant. I wouldnt be suprised that you have an old transdapt carb spacer on it. Not sure if anyone makes an aftermarket phenolic or wood staggered carb spacr.

Like others have mentioned you need to check timing and get it somwhat close to stock and see what your temps are. Also have you moved your metal fuel filter off of the rocker arm cover?

 

[Jordan L]

Jordan, looking at the pic of your carb / intake it looks as if you are running an oem intake manifold. With that being said you might need to get a conversion style carb spacer to go from thermoquad base to afb carb base. So before you go buying stuff take a good close look at the bolt spacing on the existing carb and make sure the bolts are all equidistant. I wouldnt be suprised that you have an old transdapt carb spacer on it. Not sure if anyone makes an aftermarket phenolic or wood staggered carb spacr.

Like others have mentioned you need to check timing and get it somwhat close to stock and see what your temps are. Also have you moved your metal fuel filter off of the rocker arm cover?

I put in a clear wix fuel filter and moved it off the rocker cover. It was never touching earlier, just looked like it was in the photo but its 2-3 inches away now.

Yes i believe I have the factory intake manifold, which is two openings vs edelbrock four hole. I will take photos of everything once I get home to show you guys.

I ordered a wooden 1/2 inch spacer but it did not fit. I need a spacer that bolts down into the intake manifold then carb onto spacer.

Also will check timing once I get the timing gun from my brothers house. Hes borrowing it

 

[threewood]

I put in a clear wix fuel filter and moved it off the rocker cover. It was never touching earlier, just looked like it was in the photo but its 2-3 inches away now.

Yes i believe I have the factory intake manifold, which is two openings vs edelbrock four hole. I will take photos of everything once I get home to show you guys.

I ordered a wooden 1/2 inch spacer but it did not fit. I need a spacer that bolts down into the intake manifold then carb onto spacer.

Also will check timing once I get the timing gun from my brothers house. Hes borrowing it

Ahhhh, you probably won't find one if that is a 2 bbl manifold and honestly I would either 1 ) put a 2bbl carb back on it or 2) install a 4 bbl manifold so it matches the carb.

Is it for sure a 2 barrel intake?

 

[Ski 61701]

Please take some pics with carb off. If it is a 2bbl intake it might behoove you to get an aftermarket intake so all you need is a 1/4" or 1/2" thick phenolic spacer. Right now I'd be curious with your adapters if you currently have any vacuum leaks which might contribute to some of your current problems?

 

[Jordan L]

This is what im working with guys. Looks like the factory two barrel intake to a four barrel adapter plate?

 

[threewood]

View attachment 554124 View attachment 554126 This is what im working with guys. Looks like the factory two barrel intake to a four barrel adapter plate?

That looks like a 4 bbl spreadbore intake. The aluminum adapter is being used because the intake primary bores are smaller than the primaries on the carb and the new carb has a different bolt pattern so the adapter is necessary. If you have the clearance, the spacer I linked above should still work on top of the adapter.

 

[oldbee]

Three wood is right, looks like a thermoquad manifold to me, in fact, has to be.

 

[Jordan L]

I'm doubtful that I'll be able to add another 1/2 inch on top of the aluminum adapter. There is already a imprint of the air cleaner on the hood insulation.

As far as the thermoquad, what model did this come off of? Is this better...or worse than factory?

I apologize for my ignorance, this is my first dodge 318

 

[Fran Blacker]

A desperate measure would buy a phenolic afb spacer and modify it to the manifold.

 

[threewood]

A desperate measure would buy a phenolic afb spacer and modify it to the manifold.

Would the AFB be able to bolt straight up to the stock manifold? If so, a spacer can definately be modified to work.

 

[Ski 61701]

I'm doubtful that I'll be able to add another 1/2 inch on top of the aluminum adapter. There is already a imprint of the air cleaner on the hood insulation.

As far as the thermoquad, what model did this come off of? Is this better...or worse than factory?

I apologize for my ignorance, this is my first dodge 318

First off Jordan, no need to apologize, a vast majority of us here were in your shoes at one point. I'm happy you are willing to tackle this project and not give up!!

Ok you have what is called a spreadbore carburetor primary openings are smaller for fuel economy and secondary is larger so when you mash the gas pedal the power hits and you'r gone. Some of the later 318s actually had Rochester carbs on them eg: meaning GM carb.
Those carbs can be tricky to tune due to center fuel well corroding away, plus aftermarket tuning parts are almost non existant. So here comes companies like transdapt who makes carb adapters like yours to make the proverbial round peg fit in the square hole.
I can see how you can get a little frustrated after seeing this.
There are a couple of ways to deal with this.
1. Try and find the correct carb for your motor and rebuild it. This can be a real hassle in trying to find a GOOD core, and a good person to rebuild it.
2. Buy either a new or good used aftermarket edelbrock 318 4bbl intake take measurements of the height of exsisting intake and look at machinist prints of edelbrock intake and see if you'll have the height to use at a 1/4" penolic spacer.

Hope this helps you out

 

[Jordan L]

2. Buy either a new or good used aftermarket edelbrock 318 4bbl intake take measurements of the height of exsisting intake and look at machinist prints of edelbrock intake and see if you'll have the height to use at a 1/4" penolic spacer.

Hope this helps you out

Yup, im probably going to order a new edelbrock intake manifold, gasket,phenolic spacer from summit, and use my edelbrock 1406 correctly. Slap it all on and flush the coolant one weekend. Just ordering the parts and finding the time now

Im looking at the edelbrock 7576, 2126 and 7577

Have any of you guys had experience with these? which is better?

 

[Ski 61701]

Im really not a small block guy but motor principles are the same. Since you dont know exactly what cam you currently have , I'd be a little conservative on intake, and go with performer. Before you take yours off I'd measure from the front of intake rail to to top of carb mounting see what your height is. Compare this to performer intake. You wanna be able to close the hood. Id also put carb and air filter back on and measure from air cleaner to bottom of hood. Some guys use clay thats softened up and once its mashed you measure it theres your air filter clearance. Another thing to consider, does your state do visual smog checks? If so I believe the performer is smog certified. Whereas the other rpm intakes dont remotely look stock and might not have whats needed to pass.
Now if you know your cam specs, and smog check and clearance is not a problem, I'd probably use the rpn, cooler air under carb might help with carb boil over.

Hope this helps you.

 

[Don Gould]

We use a ball of aluminum foil, loosely ball it up and place on top of the carb, close the hood and the foil will compress and not spring back. Quick and easy.
Standard height of a Holley style 4 BBl is 4.75". The performer intake is a stock replacement at very close to stock height.
With the RPM manifold you may have to use a air filter base with a 1.75" drop to give you hood clearance with the RPM intake. We have them in stock with 14" diameter $30.00

 

[66chargerpat]

Jordan, first thing I see wrong is the pcv port going to your driver side breather without a pcv valve. That's not going to work good at all. Hooked up that way, your engine is getting unmetered crappy air all the time. This could be half your problem. When you go to start your hot engine, the crankcase is pushing all that crappy air into your intake. The blowby is waste gasses, that has very little oxygen and a lot of carbon monoxide. A pcv valve is a spring loaded check valve, it only meters a small amount when there is sufficient vacuum to over come the spring pressure.
I had a old 318 that would fill the engine compartment up with blowby when cranking hot. This car drove me nuts. I would open the hood, check for fuel and scratch my head!? Get back in the car and it would start up after cranking like it was flooded.
One other thing to check is the valve on your exhaust manifold. Make sure it is open so you don't heat your intake to hot. Sometimes they get stuck in the closed position forcing all of that banks exhaust gases through your intake to the other engine bank.
You also can try using a 72 and up 1/4" carb gasket between the intake and that spacer.That will block a good bit of the heat from the carb. Pat