TraviZ

iTrader: (2)

1800-6000

287°/298°

219°/227° @ .050"

.471"
.480"


this is the specs on a lunati cam . the rpm range is perfect for the stealth ram. would this make a good combination? or should i stick with something like the comp cams

1200-5200

264°/274°

210°/220° @ .050''

.480"
.480''

or even..

2000-6000

290°/307°

230°/244° @ .050''

.510"
.540''

Tibo

iTrader: (15)

Lunati = too expensive for what you get.

A good cam to look in to are these made by ther GM/Crane partnership:
12370845 Hydraulic roller design I:214 E:224 I:488" E:509" 112

12370846 Hydraulic roller design I:222 E:230 I:509" E:528" 112

12370847 Hydraulic roller design I:234 E:242 I:539" E:558 112

The CC306 is considered to be an "old" design cam and the 847 is supposed to be better and newer. Those threee are GM/Crane cams. I believe that GM and Crane have a close relationship and Crane makes those three, something like that. Stick with the '846 or "Hot" cam. The LPE 219/219 is a good cam that can act like it is a bigger. Or you could go to a solid roller....

91Z28-350

I think it kind of depends what's between the cam and the intake too (heads). What heads are you going to use? If you have *** like flow, go big if you want (or not for streetability). The Edelbrock headers will probably hurt you in the long run.

GM definitely uses the Crane Cams for their 845, 846, and 847 cams. I know the 845 is Crane's 109821, 846 is 109831, 847 is 109841. One thing to note when comparing cams, Crane lists valve events at 0.004, Comp uses 0.006. Crane gets more advertised duration listing at 0.004.

You should look at the XE lobes for Comp. The 264HR you listed is old and boring. The XR276HR is much better.

But it all depends on what you want to achieve. What is it?

TraviZ

iTrader: (2)

basically i want the best cam that compliments the stealth ram. prolly a peak rpm of around 5500rpm. stock heads for now, supercharger comes a long while after the intake and cam, and then heads will be a long time down the road..

91Z28-350

That's backwards. You should probably do 2 cam swaps then, particularly if you're doing a head swap much later. The HSR will give you some more breathing room, but the heads are going to choke you out.

You want the cam to complement the stock heads, not the HSR. The HSR removes the TPI limit, but the head limitation is still there. When you change your heads is when you should change your cam (taking into account the HSR). You have 3 choices. The Crane CompuCam 2032, LPE 74216, or the Comp Cams 264HR. The 264HR is very close, from what I understand, to max lift. Measure your heads. You don't have to pull them to measure. If you don't want to, look at the LPE 74216 or the CompuCam 2032.

Edit: If after measuring you find you can clear 264HR, you may be able to look for clearance for the XR264HR.

TraviZ

iTrader: (2)

measure them for clearance?? i thought springs were the only thing holding back lift?

91Z28-350

No, you need to measure the retainer to valve seal/guide clearance. You also need to worry about springs too.

Here's a pic, stolen from Comp Cams...

Edit: Notice the area that's marked "must be greater than valve lift". You take that difference, and subtract a 0.060" fudge factor and that's your max lift. You can use a smaller fudge factor, but you really want some "play" room. Especially if you get valve float, or if your springs get tired, or...

If you pull the heads and cut the guides for clearance, then, yes, only springs matter....and the valve seat diameter to hold the spring.

After .480" lift, you also need to worry about your rocker studs. You'd want screw-ins.