What do you think about this cam

[1973dusterkid]

No, you have both of those wrong. The top one is the XE268H. BIG difference from the 268H. Here is the 268H:

http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=619&sb=2

That is the cam that I had that I just sold. Very mild and would have been perfect for a stock upgrade.

Here is the factory 340 cam specs:

268/276 duration, .429/.444 valve lift 114 center line

The 268H as I had, was very close to the 340 cam. Comp sells it in fact, as the replacement for the 340 cam.

Will I need new lifters and springs

 

[RustyRatRod]

You would need those regardless on an engine build.

 

[1973dusterkid]

Ill do the bolt on's and not worry about the cam.

 

[412 Stroker]

Ill do the bolt on's and not worry about the cam.

Not a good idea IMO:
Strokerscamp/others correct me if i am wrong, but if you put a carb, manifold, something better for exhaust, and you dont put in a bigger cam, I would think you wont see much difference other than burning more gas?? Isn't all the add on's dependent by the cam in the engine?? You and others have said it before you need a complete package, no cam change is not a complete package.

 

[Bulldozer]

i recently took a 67 318 two barrel motor, threw on a set of headers , performer carb and intake , and it made a huge difference. especially for street use. bolt the stuff on your 318 and save your cash for the 360.

 

[RustyRatRod]

Not a good idea IMO:
Strokerscamp/others correct me if i am wrong, but if you put a carb, manifold, something better for exhaust, and you dont put in a bigger cam, I would think you wont see much difference other than burning more gas?? Isn't all the add on's dependent by the cam in the engine?? You and others have said it before you need a complete package, no cam change is not a complete package.

Well.....anything you can do to move more air in and out will help. Since he's talkin about a 360 later, I think he oughtta hold off on cam because in order to do it right, he's gonna be talkin cam, lifters, sprAngs and possibly pushrods if the base circle is reduced. I don't think he's ready for all that expendature yet. Plus, if he puts bolt ons on the teen, he can add um to his 360 later on. Long as you have more fuel goin in to match the airflow, it's gonna make more power regardless of the cam.....although it WOULD make more with the cam change. Hell, if it was me, I would say screw it and just build a nice little balls out 318. 325-350 HP with no trouble.

 

[1973dusterkid]

Its also going to have a 4 speed behind it.

 

[Johnny Dart]

Not a good idea IMO:
Strokerscamp/others correct me if i am wrong, but if you put a carb, manifold, something better for exhaust, and you dont put in a bigger cam, I would think you wont see much difference other than burning more gas?? Isn't all the add on's dependent by the cam in the engine?? You and others have said it before you need a complete package, no cam change is not a complete package.

See page 2 post 47.
Is it optimum performance,no. But the right selection of bolt on's can work nicely. Key word being "Right".

 

[dodgetkboy78]

A stock 318 with a 4bbl and headers, is pretty "strong", and will rev to 5K or so, making power to 4500.... I'd just do that. I can say, that, you would get more power with a milder cam, think 260/260 comp, (remember, keep duration the same). I have put a 260/260 comp, and the low lift ISKY 258, in more than one stock engine. Stock engines seem to be OK...... until about 440 lift. remember, you can't hold me to it if you DO have issues, however, it has been done.
There is a huge difference between the 268H, and the 268/276 stock cam, HUGE. One runs good and one is a DOG. (the 340 cam is very lame to me) That 340 cam you put the link up, has been tweaked to 110LC, and more lift. Better, but, IMO, you don't want longer EX duration on a small cube small port motor, what you want, is to take that EX lobe, and move it closer to the intake. (More chop, more cylinder pressure, more low end power, harder low end hit. Sure, in theory, it will hurt top end, but also remember, you have stock heads, and small inch motors don't suffer as bad in the top end department.

All that said, if I were you, from what I read, I would get the performer manifold, a 600CFM EDELBROCK, and air cleaner, and headers. You will make around 230-240 HP or so, be reliable, and you won't have to worry about all the funny things that happen when you change cam lift in a old engine, like the wore spot going past the valve guide seals and tearing them up.

 

[1973dusterkid]

Easy bolt ons for the 318 BadA$$ 360 in the funture.

 

[1973dusterkid]

Getting ready to ride to summit to get my parts.

Intake
Carb
Headers (Are the summit 3in headers any good)