I was about to purchase the cam in my signature and decided to research a little more on the subject. While I was looking around I saw the comp cams 280B-8 cam. It's very similar to the one I was going to get except it has a little less duration, a little less lift, and a narrower LSA (108 vs 110). I was reading somewhere that wider LSAs 110+ are meant more for smaller displacement engines, and since I'm building a 406 wouldn't a 108 LSA cam be a better choice?

This cam will be for my 68 chevelle with the stuff you see in the sig, 3.73 gears, a 2004R, and 29" radials. The car won't be driven daily, but will be driven multiple times a week. I'll probably have this cam for a year too, so it has to be reliable. I want something that will give me great torque up to 5500+.

It needs to idle well... a little lopey is fine... as long as my electric fan works fine (no ac, no power brakes, MAYBE power steering). I plan on a max of a 3000 stall (lower if possible). I'm looking for a solid cam with up to .550 lift with 1.5:1 rockers.

Performance wise... if I had traction I would love the cam to put me in the 11s, but mid-low 12s would be very nice too.

TIA

Is this the CC 280-B-8 solid cam you mentioned??

280/242/285/250, 108/?, .507"/.532" gross lift.

pdq67

Sorry, typo. It's supposed to be the 280S-8 (12-221-5). But yeah, that's the one... thanks pdq.

Crane and Isky gave me some recommendations too...

Comp Cams 280S-8
--------
280/285
242/250
108 ICL/108 LSA
.507/.532

Comp Cams CS XS282S
--------
282/290
244/252
106 ICL/110 LSA
.521/.540

Crane F-244/3454-2S-6
--------
280/288
244/252
106 ICL/106 LSA
.518/.536

Isky Z-35
--------
288/288
254/254
.525/.525
108 ICL/108 LSA

I tried calling Lunati, but their office just closed... Harold are you reading this? Do you recommend something?

I spoke with Isky the other day looking for a cam recommendation for my '59. I'd call Isky back and ask about their "S 652" grind or something similar for your car. It's a newer grind, and not yet listed in their on-line catalog. .528" lift (with a 1.5 rocker), 270 * adv, 242* @ .050", on a 110 LC.

Originally posted by wes migletz:
I spoke with Isky the other day looking for a cam recommendation for my '59. I'd call Isky back and ask about their "S 652" grind or something similar for your car. It's a newer grind, and not yet listed in their on-line catalog. .528" lift (with a 1.5 rocker), 270 * adv, 242* @ .050", on a 110 LC. =
Wes,the S652 is not a complete cam grind it is a master number & is one of the newer "tight lash" circle track profiles.
It is only one lobe not a whole cam & is a pretty aggressive one.
Here's the adv/ .050 / .200 numbers:
270/242/154, .352 lobe lift.
It is rated at .020 but adjusts at .014 to .016 so the seat timing is actually a little deceiving, it is probably closer to the 276-280 area at .014.

Casey, it would make an excellent intake lobe but I'd use something a little less "exciting" on the exhaust though :D
I would also recommend a P55 core for this lobe.

If you decide on Isky email me & I can probably save you a dollar or two ;)

Mike, thanks for the explanation, and I'll be giving you a call when I'm ready to order. Just to be sure I understand you, are you saying there can have two different lobes on one cam, such as the S 652 on the intake and P 55 on the exhaust? If the same "S 652" exhaust profile was used, would it lead to durability issues? Thanks again, Wes

Originally posted by wes migletz:
Mike, thanks for the explanation, and I'll be giving you a call when I'm ready to order. Just to be sure I understand you, are you saying there can have two different lobes on one cam, such as the S 652 on the intake and P 55 on the exhaust? If the same "S 652" exhaust profile was used, would it lead to durability issues? Thanks again, Wes Wes,
Sorry if I confused you.
The P55 core is a premium cam core casting & I use it almost exclusively in any custom cam I order.
The S652 lobe is pretty aggressive & I prefer a slightly less aggressive lobe on the exhaust side. Not as much for durability, more the way the valve is "tossed" around :D
I normally discuss this with the cam designer & they can tell me how wrong I am in pickin lobes :D
To answer your question, yes you can have different lobes on intake & exhaust as almost all Comp's & also Harold's cams are.
IE: the 288/296 grind of Harold's that is a real favorite in a lot of applications. The intake is one lobe design & the exhaust is another

Mike, thank you for the clarification.

Wes

The Comp 280s is most similar to the Lunati 276/84 solid, at least on published specs. Nice cam in a 440. 401A6 Lunati, and you mgith wnat it out on a 112 lsa to ease the lope some. 110 is std and better for power.