99ssleeper

iTrader: (98)

With my A4 and the idle at about 600 rpm, yeah, you can hear a little lope and you can tell it has a cam. But if I raise the rpms to about 800, most of the cam sound goes away and it could be passed off as stock to someone who is an LS1 n00B

I also have stock manifolds and the SLP dual/dual.

NastySSoo

Some of you guys are much more tuned in to cam sounds apparently than I am. Its more choppy but less lopey? I cant pick up on all that . I can tell you I made 417rwhp and 404 rwtq with my C1 and it was over 400 hp all the way to my 6800 limiter. Thats not good high rpm hp? I am definately no cam expert, but I do think they are both excellent choices. Im curious to see how these new BIG cams translate to track times. Ive got several buddies who have installed the T Rex, and LGs cams and Im curious as to how they do at the track. When I freshen my motor up at years end Ill probably make a cam swap!

SouthFL.02.SS

You're making good power up top due to the heads.
It's choppy, but not lopey, as compared to my TSP 231/237. Now that's a LOPEY cam.

lsx24

iTrader: (45)

Well, I believe so. I know there is some addition of duration at 0.200 that helps midrange and idle. I think they are both pretty close.

Mirek

Lots of good input on such a finite difference ...
I mean:
If the C1 has more total duration (due to the slower ramp rate) AND higher lift (.566)THEN i meant to say that it would appear that the hammer cam (C1 222/222) is the "bigger" albeit older cam...and I know this is splitting hairs.

lsx24

iTrader: (45)

Without specifying the valve events, I would guess yea the slower rates might be better for area under the curve. Is this what you are referring to?

BigTex

iTrader: (16)

I would think the opposite - more aggressive rates would show more power under the curve. My thinking: (compare 224 XE and 224 XER) more aggressive lobes will have less advertized duration for less overlap, then will have more duration at points higher than .050 and peak higher. So you'd have less overlap in the low lift range for more torque, larger durations in the upper range for beter cylinder fill, and higher peak lift to aid better flowing heads. That should add up to a cam that makes a bit more torque, a little more hp, and has a little less lope. The downside is the valvetrain stress.

If the thunder lobes are more aggressive than the plain XE lobes of the C1, then that would explian the idle and under curve power comments.

Mirek

My cam card says advertised duration = 286 & duration @ .50 = 222
Anybody know the advertised TR on the 224 ?

BigTex

iTrader: (16)

I found this info for the TR224:
https://ls1tech.com/forums/showpost....76&postcount=4

Comp says their plain XE lobe is 275* advertized for 222 @ .050 and the XER is 273* for the 224 @ .050.

So it appears the TR224 is quite a bit tighter down low than the C1. The XER looks to be just a tad bit tighter at .006 than the TR cam.

Mirek

Good info man I appreciate it !