318 4 bbl and intake upgrade

-
I agree with you a 100%. When I suggested that or even the 500 cfm, people say that I don't know what I'm talking about.
no, they said you'd be leaving power on the table with a 500 (when compared to a 600/650 obviously). learn to quote correctly not to suit your argument. you twisted their statement to make it sound like they'd compared the 500 to the stock 2 barrel which clearly wasn't the case.
 
The benefit I see from going to a 4bbl intake is not the extra carb flow so much, it is the improved runner design/shape that comes with the 4 bbl intakes. It is a low performance engine & if we are generous & assume it makes peak hp @ 5000 rpm with 80% VE, then a 318 only draws about 400 cfm. So a 500 4bbl like the Edel AFB/AVS would be ideal.
 
Many years ago I had a standard 2 bbl 360 in a charger and it was reasonable on fuel and went alright. I put a 340 cast iron 4bbl intake on with 4bbl carb and it lost performance and fuel economy. I could never convince my brother that this was the case.
 
The 318 didn't even come with a 4 barrel carburetor until they offered the roadrunner package on the volare and I don't think that they made millions of those.
Sorry guys, but this is true. The 318 wasn't offered a 4 barrel carburetor until the volare came out. I'm not talking about the police package vehicle's as they were not available new to the general public.
 
Looking for suggestions for best intake and 4 bbl carb upgrade for a 1969 Barracuda 318. Not looking for anything radical just want to move from the stock 2 bbl to a 4
I'm sure that you have been given every suggestion under the sun. I'd probably use a intake manifold that has ports close to size of the 318's cylinder heads. Carburetor, the smaller carbs will give you the best throttle response and low to midrange torque. A lot of guys are going to suggest a bigger carburetor but for what it sounds like your looking at doing a 500 cfm is plenty. If you upgrade to better heads, cam, then yes the bigger carburetor will be needed. I think that a 500 cfm carburetor, good intake manifold, 4 hole 1/2" carb spacer, 340 cam and dual exhaust will make you a fun ride. This probably already has been said, I didn't feel like reading the whole thing again. Happy hot rodding.
 
How about maxi vans ?? 318, Thermoquad with single exhaust in a 6k pound hoogie
I was talking about every day drivers, not many people buy maxi vans. The op was talking about con
I should just stop. But I'm not. You're just WRONG. How many police, fire and EMA cars do you think were made with 318 4 barrel engines? Can you say Diplomat?
The diplomat was not offered to the general public with a 4 barrel carburetor. The vehicles that you are talking about were for the first responders only, the general public could buy them at auction but not from their local dealer, I tried that
 
I had a factory original 84 RamCharger. 318 4bbl engine. Option code stickers we under the hood and it was legit. Was a Thermoquad and actually ran very well
 
I had a factory original 84 RamCharger. 318 4bbl engine. Option code stickers we under the hood and it was legit. Was a Thermoquad and actually ran very well
Right, but it's after the 70's. My point was is that there wasn't one prior to the volare roadrunner package
 
Sorry guys, but this is true. The 318 wasn't offered a 4 barrel carburetor until the volare came out. I'm not talking about the police package vehicle's as they were not available new to the general public.
318's were offered with a dual quads long before the 70's.
 
318's were offered with a dual quads long before the 70's.
I've never seen or heard of any 318 ever being offered with anything other than a 2 barrel. They wasn't a factory option. Probably dealer installed. I have family that retired from Chrysler
 
I've never seen or heard of any 318 ever being offered with anything other than a 2 barrel. They wasn't a factory option. Probably dealer installed. I have family that retired from Chrysler
None of us know every avenue of this hobby. You should open your mind, all there is to know you have not obtained, and neither have I. "Any 318" you say, but yes, the 3.91 bore, 3.31 stroke 318 was offered with dual quads.
 
same bore and stroke...... but not an la though. the 302 in early z28 camaro's isn't a ford 302, same bore and stroke but...... :lol:
It's a 318 mopar, that share many parts with the LA. Can you put the 302 Ford crank into a 302 chivy?
 
None of us know every avenue of this hobby. You should open your mind, all there is to know you have not obtained, and neither have I. "Any 318" you say, but yes, the 3.91 bore, 3.31 stroke 318 was offered with dual quads.
just what i thought, just because you've never heard of or seen it doesn't mean it never existed.
 
no, but we all know he meant la 318 :thumbsup:
He said "any 318". I do not disregard the poly 318. The poly 318 is just as much mopar as the LA, was in production for many years, and the LA got many of it's parts from the Poly. I also do not disregard the magnum 318's. Keep in mind, all this because I suggested a 3310 and Dan quoted me say'n "way to much cfm's for a 318". We are talking the 318 C.I. engine. By the way, we are a ways away from the OP's question LOL
fpics%2fbigpics%2foriginal-1957-plymouth-fury-318-dual-quads-bumper-wings-parts-or-restoration-8.jpg
 
Last edited:
He said "any 318". I do not disregard the poly 318. The poly 318 is just as much mopar as the LA, was in production for many years, and the LA got many of it's parts from the Poly. I also do not disregard the magnum 318's.
View attachment 1715892456
I did mean the la 318 only. I believe that the discussion was on a 60's barracuda and the poly was already gone
 
I did mean the la 318 only. I believe that the discussion was on a 60's barracuda and the poly was already gone
Lets not forget, all this because I suggested a 3310 and you quoted me saying "way too much cfm for a 318". So no matter Poly or LA, we have shown and posted that Mopar themselves put a lot of cfms' on the 3.91 bore, 3.31 stroke (I.E. the 318)
 
haven't others already quoted van and truck 318's with a 4 barrel. you said readily available which they were, you can't have it both ways :rolleyes:
my neighbor drove a factory 318 4bbl van for years, he car-pooled to work and had many riders.
 
-
Back
Top