four barrel 318

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americanmuscle

americanmuscle
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I'm trying to get a decent 4 barrel intake on my 318. I've got about $175. I'm putting a bigger cam in soon. I want to know if I need to get my heads match ported, but what kind of manifold would work best, and what kind of carb.

hardened steel crank, bored.030, stock rods, stock 318 heads with new valve guides, 3 angle job.

I just got out of Volkswagen performance, so I don't know anything about V8s
 
If it will land up being a mild street car,a dual plane manifold is needed.The type of driving you itend to do needs to be pionted out and the rpm range you wish to drive in the most needs to be mentioned to chose a cam and the right manifold.Do you know what heads you have,or can get,and what buget do you intend to spend on the motor over a year or so,mrmopartech
 
you need a good daul plane, such as an edelbrock performer or an older eldedbrock LD4B. either one should fit in your budget, give ebay a try. the performer's ports can be matched to the 360 heads if you like update later.
 
i have the edelbrock performer with a holley 650 double pumper ontop of it with the same stock heads i just got new valves and valve springs and a 3 angle done... i have a .508 lift cam in it and it runs like a beauty i love it.... she has given me no problems what so ever
 
Mrmopartech is on it right. Whats the intended purpose of the car.
A mild street ride should use the aboved mentioned intakes. The stock 318 heads need no work to "Match" it.
Use the stock heads.
BJR racing can help with how the heads get done when you have decided on cam, comp. ratio and rear end gears in what (?) car you have it in.
 
Id go for the 318/360 Performer (has the smaller 318 ports) intake. With a 600ish cfm Eddie/Carter...sorry but i hate holleys :lol:

My daily driver has some 360 J-heads, 3angle, fresh valves, performer rpm, .480lift and i should be able to hit about a 14-Flat here at 2000ft elevation...if i can hook with the 3.91s and the low gear set in the tranny :thumblef:

-Mike
 
Yes, the 340/360 is a larger window. It will slow down the mix making the teen perform a little more slugishly with low end torque lose and a good probablity of upper HP lose unless your engine is preety well built.
 
good info here,I will use it in the future. A all the way :director:
 
i had a 68 D-200 P/U with a .30 over 318 with a 505/292 Isky Cam i used some 340 J-Heads Edelbrock Torquer II Manifold RPM range 3000-7000 it ran 1290/107 if you are going to change your intake i would do the cam/heads/intake/headers at the same time. it will save you time and money in the long run.if you need a cam i have a Purple shaft 484/284 with lifters 2800/6200 rpmi went to a different cam. you will find that the 340/360 heads will breath much better. you will get more out of the heads than any other part you put on other than Nitrus.if you want the cam & lifters let me knowthanksDon813-434-5577
 
Like these guys say, it depends on the intended use of the car.

I just put an old LD4B on my 318 with a 670 Holley Street Avenger ( a 570 might have been more ideal, but I already had this one). It made a huge difference over the factory 2bbl.

THe LD4B isn't in production anymore, so you have to find them at a swap meet or ebay or whatever, but they're usually cheap, and it matches up well with the 318s ports.

If you're planning on getting serious about the 318, I'd try not to spend a lot of money now, as you're going to want to swap the heads for something better. 318 valves and ports are tiny, even for a smaller motor. I'd look into a magnum head swap or a set of the Iron Ram heads.

Steve
 
A-muscle; FYI,
I'd look into a magnum head swap or a set of the Iron Ram heads
Click to expand...
The Iron Ram heads are Magnum heads. LX guy, can you provide a link to the site for these heads?
 
Check your local Craigslist for Mopar stuff...Seattle and Portland seem to have abit still floating around. There is a set of fresh 360 heads and a Performer 318/360 intake on there right now for $450.
 
americanmuscle said:
is there a difference between the intake port sizes of the 318 or 360?
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Yes. You have to watch it, though. The 318 Diplomat Cop Car had 360 heads.

I'm running a Performer, 625 AFB, 302 heads, and an aftermarket cam. The cam specs are .441 lift, 218/228 (i/e) @ .050 lift. The engine is a 68 318. Compression is ~ 9.3:1. Good throttle response with a little extra kick over 2000 rpm. Nice street motor.

DSCN1902.jpg
 
im going to be either tearing down my 318 heads and put 360 valves in, or get 360 heads and rebuild them. im going to do a single turbo 318 setup. any suggestions on what would be best??
 
rumblefish360 said:
A-muscle; FYI, The Iron Ram heads are Magnum heads. LX guy, can you provide a link to the site for these heads?
Click to expand...

Well, I suppose its a little late for this, but:

http://www.hughesengines.com/partDetail.asp?partID=11900&eTypeID=1

Seems like they are a better casting than the stock Magnum head.

Pretty decent performance for the money probably, but you still have to do all the parts swapping (rockers, pushrods, lifters) like you would for the regular Magnum heads.
 
How about for a mainly in-town driver. 25-60 mph on an average day, but wanting more at the red-n-greens. Is a head replacment and cam change really that neccessary on a stock engine for a decent 4bbl setup?
 
For a mild street build with normal highway gearing I would probably keep the smaller heads for now. You Can get pretty decent performance from the small valve heads. Some like to use the 302 castings upgraded with 360 size valves but on a standard geared car I think it's a waste. You should change the cam if your going to be adding a 4BBL you can pick up 30-40 HP with a change to something bigger and better with no loss in millage. One of the mopar mags did a build up on a stock headed recon re-man 318 and got 100 hp more with small tube headers, intake and carb, and cam change. I think they used a comp 260 for the cam. The stock cam is around 185@.050 with around .390 lift not much power there. You can add 75-100 HP to the stock motor and actually improve the way it drives and increase the millage. Make sure you run a small port intake that matches the heads if you can.
 
74valiant said:
im going to be either tearing down my 318 heads and put 360 valves in, or get 360 heads and rebuild them. im going to do a single turbo 318 setup. any suggestions on what would be best??
Click to expand...

Missed this!!!!!


74 val. The 360 head would be great for a turbo set up and big breathing.
This question would have been better asked as in it's own thread.
 
n3w6uy said:
How about for a mainly in-town driver. 25-60 mph on an average day, but wanting more at the red-n-greens. Is a head replacment and cam change really that neccessary on a stock engine for a decent 4bbl setup?
Click to expand...

I don't know what "Red-n-greens" are, but I get the basic idea. The answer is NO. What you would want to do is just a simple 4bbl. intake of any kind and get the carb style of your choice on top. I would not go larger than 600 cfm on a easy driver.

A 500cfm Carter/Edelbrock would work fine as well with a stock 318 and drivetrain. Hwy. gears and converter being stock as well. It would offer good throttle response and mileage. The AFB/AVS carbs are very reliable and consistant.
 
I don't know what "Red-n-greens" are

Just a swag, but I would go with "stoplights"...
C
 
:violent1: .... #-o ....... Oh, of course, that answer is a winner! =D>

Then I'd go 600cfm and a cam would be good, no needed, but it wold help alot ............
 
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