Cam for stock 318

[kevpeters1]

I've got a stock 318 with a dual plane intake an edel 600 carb. It's got 302 heads, so I guess the compression is around 9 to 1. The stock cam is really weak. I want something that will wake the motor up without me having to replace the lifters and the springs. Any suggestions?

 

[YY1]

Summit 6900?

 

[69 Cuda 440]

I've got a stock 318 with a dual plane intake an edel 600 carb. It's got 302 heads, so I guess the compression is around 9 to 1. The stock cam is really weak. I want something that will wake the motor up without me having to replace the lifters and the springs. Any suggestions?

Your current Camshaft {if Stock} is probably >
Lift .......... .373" / .400"
Duration ... 240* / 248*

If you want to swap out the Camshaft, and 'not' change the Lifters or Valve-Springs,
you sure as Hell don't want to spend any good bucks for a Camshaft.

You will probably end up 'wiping' the Lobes within 5000 Miles with
pattern-worn Lifters.

As 'YY-1' stated, the Summit SUM-6900 is the best bet.

Lift ..................... .420" / .444"
Duration .............. 278* / 288*
Duration @ .050"... 204* / 214*
LSA ..................... 112*

Characteristics >
* Smooth Idle
* Excellent Low-End Torque
* Very Good Low-End Horsepower
* Good Mileage Camshaft
* RPM Range ..... 1200 to 5000

Cost ....... $71.00

 

[krazykuda]

You need to replace the lifters if you change the camshaft....

 

[toolmanmike]

New cam, new lifters! ( a good chance the wear on those old lifters will eat up that new cam and can cause major damage to the bearings.) New springs matched to the cam are a good idea too. Tmm

 

[roccodart440]

Crane Cams 693801

Duration at 050 inch Lift:
222 int./234 exh.

Valve Lift with Factory Rocker Arm Ratio:
0.467 int./0.494 exh.

Lobe Separation (degrees):
114

 

[69 Cuda 440]

Crane Cams 693801

Duration at 050 inch Lift:
222 int./234 exh.

Valve Lift with Factory Rocker Arm Ratio:
0.467 int./0.494 exh.

Lobe Separation (degrees):
114

Whoa Nellie,

That is way too much for old '318' Valve Springs.

 

[rumblefish360]

YOU MUST REPLACE THE LIFTERS WITH A NEW CAM SHAFT, PERIOD!

Further more, I make these suggestions and without knowing your gear ratio and tire size. I'll assume a converter change is not going to happen, so with that in mind, I seriously suggest saving your money for a cam and lifter set along with the matching valve springs for this cam, the largest suggest for a stock converter by Crane.
(But I do like Rocco's cam. It will just need a gears @ a converter for a good result Mello sound.)

Crane Cams;
Advertised duration/ 272-284
The duration @.050/ 216-228
Lift w/1.5 rocker - .454-.484
On a 112 which has a smoother idle than most cams ground on a 110.
This cam doesn't need a torque converter change. I do suggest a min. Gear of 3.21/3.23's with a stock tire for a good result. Do not go above a 3.91 ratio, use wider tires at a max of 26 - 26-1/2 inches with the 3.91's. You'll like a wider tire with the 3.21/3.23's.

Cam and lifters should be treated as a matches pair for each other. The springs will be needed since the stockers are not up to par for this or any cam change IMO.

Comp Cams has a similar cam (or 2) on a 110 for that Muscle car sound.

Don't cheap out, do it right and do it once as a package and feel the bang for the buck all at once. You all ready have the carb and intake. Adding this will help out nicely. Dual exhaust would also be nice, headers or not.

 

[66fs]

I'd go with a 268 duration on the intake or a 340 reproduction cam. Like Rumblefish 360 said, wait, get the cam, lifters, and valve springs. It is that important. I'd go even further and tell you to get a double roller timing set while you are in there.

 

[roccodart440]

Whoa Nellie,

That is way too much for old '318' Valve Springs.

Yeah I missed the part where the OP said he wanted to use his stock springs. For what it's worth I would chance them to match the new cam.

 

[Dubob]

I haven't messed with small blocks a whole lot. Someone correct me if I'm wrong (been there before) but weren't 302 castings used on roller cam motors from the factory? That being the case the OP needs to put some more info out about the engine. Was this a complete engine swap with the heads or were they added to an earlier short block. If I'm incorrect I apologize in advance.

 

[Patrick]

FWIW, i installed a 340 cam in my stock 318 (AL 4 bbl intake, duals) and it works fine, although i do have a 4 speed but not as much compression as you. I think you'll be fine with a cam close to 340 specs.

 

[273]

If his engine is a stock 302 headed 318 he would have a roller cam

 

[Bad Sport]

I've got a stock 318 with a dual plane intake an edel 600 carb. It's got 302 heads, so I guess the compression is around 9 to 1. The stock cam is really weak. I want something that will wake the motor up without me having to replace the lifters and the springs. Any suggestions?

If you change the cam, lifters HAVE to be changed. It's usually a good idea to change springs as well, something that matches the cam.

 

[RustyRatRod]

Comp 265DEH. Get the cam lifters and springs.

 

[DartVadar]

If he has a roller cam unless the lifters are really wore I dont see why he couldnt re-use them

 

[RustyRatRod]

The Hughes Whiplash cams are designed to be used with stock springs. But, if you are scared to change springs, you should probably take up jigsaw puzzles for a hobby. This hobby is all about learning how to do new things. As a general rule you MUST change springs with a cam change. Even the Whiplash will benefit GREATLY from new springs to match its profile. This is why Hughes sells springs to match those camshafts. Don't be a cheap ***. You will only regret it in the long run.

 

[AJ/FormS]

You need to clarify "wake the motor up".
A bigger cam and kit,will wake it up at higher rpm, all right.But without a corresponding compression bump, it will make off-the-line performance sleepier.Then you will be buying gears and possibly/probably, a higher stall TC.
So the place to start is with a cylinder pressure test.
And then maybe gears, depending on intended useage, since you'll likely be going there sooner or later.

If your cylinder pressure is 120 or lower, I sure wouldn't cam it.
Between 120 and 140, you will have to be real careful with the ICA. From 140 to 160, you can be more bold, perhaps something up to 220* tops. At 165, maybe enough for the 268er, that everybody loves. At 185, there's quite a bit of room.
But don't get excited, most teeners fall below 130. Occasionally they creep up a bit. Mostly, well used, they come in at less than 120 honest psi.

And something else to consider is weight.Most cars can loose 100lbs pretty quick. Some can lose another 100, but it's tougher. 200 lbs is worth an easy cam change, probably more at your power level. And you will really feel the increase in off-the-line performance. My back seat was 70 lbs. No one ever sat there. It was the first thing to go. I've never missed it.I don't even know where it is anymore! Oops sorry;the spare tire was the first to go.Steel wheels;gone. A half a tank of gas is about 40 lbs. A/C not. I kept the P/S and booster tho.
You can't believe how much the rear window in a FB barracuda weighs! But it has to stay.

 

[toolmanmike]

I have a Comp XE262-H10 on the shelf. What's the opinion on that one with a stock compression teen?
262/270° 218/224° @ .050 .462/.470

 

[273]

I have a Comp XE262-H10 on the shelf. What's the opinion on that one with a stock compression teen?
262/270° 218/224° @ .050 .462/.470

There an engine build with a stock long block that cam with MP intake, 650 and headers made 282 hp.

In the article them mentioned that's as big they were willing to go with stock CR and was for a work truck.