Rough running issues on a 318 2 bbl

No, it is a 318/904. It was a 383/727 though. Why change it to a small block? Beyond my comprehention as to why they would go through the hassle! Not to mention the casting date says 1985!? It did allow me to get a decent deal on it though!

Either way, I want to stay 2 barrel for the time being as the motor wont be in there for more than a year. Just have to save up some more funds and then it will go under the knife after the parts have been collected. If I go to a 4 barrel, then I need to get intake pan, manifold, etc. For where I am going, makes more sense to just get it driveable for the least amount.

I have also gone down this new carb road. Makes the most sense.

Where would I buy a new one and how much CFM do I need for a stock 318? I was looking on Summit and found these. Would either work? Or is there a better one I should consider?

http://www.summitracing.com/parts/HLY-64-1183/

http://www.summitracing.com/parts/HLY-64-1169/

Thanks,

For the price of a kit, the BBD is one of the easiest carbs to rebuild ! Think you would be money ahead doing that, over buying another one that may or may not be any better than the one you have.

I have always found, especially with stock motors, that if you rebuild it according to the factory instructions (or those included with the kit), you usually end up with something very very close to perfect for your application.

Have done that with Thermoquads over the years too . . . always had em work great !! With a bit of time, and reading (go figure - read the instructions !!), you should be able to get the carb you have on the car now, running like a top !!

Why take a big block drivetrain out of a C body and replace it with a small block drivetrain ? Come on, you get the big block for another project, and still have a running/driving C body ! . . . bought a 69 Chrysler 300 like that . . . it did get the 440 later on though !!

Hope it works out for you . . .

Cheers

Mark

If you're still scratching your head over this, you can have the BBD off of my Coronet when I'm done with my four barrel swap in a couple of weeks. It's a non-emissions carb so it has none of the junk that made them pains in the butt. Always works perfectly for me.

Check for a intake leak around the manifold base 318's are good for that. Also the carb was designed for spark emission control. It is too lean and I would assume does not have a O2 sensor in exhaust. Get another 2 bbl I have several but I never had a real problem with rebuilding them. Stay away from a 71 model it is a rochester design hard to get parts. By the way you did check the heat passage in manifold they love to plug up

CHECK also if the intake exh heat crossover is plugged....I will bet it is.

OK. I have battled over the last few weeks what I want to do. I ended up deciding to just wait and collect some funds, and do it right. Put on a 4 barrel and call it a day. If I am going to do it, may as well do it right.

Thanks for all of the input folks. Again, you have all kept me on the right course!

dont forget to bump that initial up!

I don't know if this was mentioned but the bbd 2 bbls had a habit of warping. Might be getting a mild vacuum leak, the fix is check the mating surfaces if you find the top or base plate is warped you can heat it in an oven and then straighten it out on a known flat surface. Might need a tad bit of file work but be careful.
I always liked those carbs and still have several. Very easy to rebuild and they work fine for thier intended purpose. The 4 bbl will porbably make you happier once dialed in. Of course this might lead to a whole other can of worms, finding kick down linkage and such.
Still think a 318 in a Chrysler is weird, but I am sure they pulled the big block and still wanted to sell the car. Porbably had the 318 laying around. Glad it turned into a good deal for ya

bumping this old thread, thanks for the info. Having trouble with my 383- 2bbl bbd carter... has run fine for many years, but since getting out of storage this year, have had dying at idle after warming up, then fuel leaking from somewhere out of the carb onto the intake manifold & boiling...

I have tried tightening the mounting flange nuts, hopefully that's it. Will try it again once it cools down... I wonder also if it's leaking out of the butterfly linkage rod

I have rebuilt this carb once before years ago, and like i said, ran great... but i don't remember if the rebuild will help eliminate a leak at the linkage rod?????


thanks

Sounds like your float quit floating.