Just curious, does anyone know who grinds their cams now they it’s no longer Comp? I saw that Cam Motion grinds some of their cams but others, such as the LS3 stage 2, doesn’t say… anyone know?

 

So I’m assuming nobody knows?

 

I guess you could call BTR. They would certainly know.

 

I did, apparently they don’t wanna release that info for some reason lol…. Not a big deal I was just curious because before it was obvious that it was Comp but I guess that ended awhile back. Still getting the BTR cam either way

 

With my cam, I just gave Cam Motion the exact specs I wanted for my cam, and they ground it to those specs.

 

Only way to go. FWIW, I have heard about, and read in several publications, that Cam Motion cams are a wee bit easier on the valve train than Comp. I don't know how true that is, but I've never heard, or read of it being the other way around, i.e.-Comp being easier on the valve train. That said, I've run 2 Cam Motion cams, and never had an issue with either. Both were ground to Allan Futrals specs. All my other Cam experience was 1 Comp cam, and quite a few older Crane grinds. Honestly never had any issues with any of them. I will also add it was a Comp grind that was in my LS7 when all 16 guides wore out in less than 20,000 miles, and 7 of 8 intakes had lost their CrN coating. However, given the LS7's heads reputation for this issue probably means that Comp had little to nothing to do with the excess wear. YMMV

 

Comp has a myriad of lobe styles for LS hydraulic roller cams. Some really harsh on the valve train due to high ramp rates (see LSK lobes) and some with really mild ramp rates (see LXL lobes). The LSK lobe series come with a warning that they are hard on valve train parts and recommended for competition use only. The LXL lobe series is recommended for high rpm endurance racing due to their soft ramp rates and are generally easy on the valve train. You can see it in their duration at .200 lift. You need 4 or 5 degrees more duration at .050 with the LXL lobes to come close to equaling the duration of the LSK lobes at .200 lift.

My last supercharged C6 had a custom Comp Cam using the LXL lobes. No problems. Also had a supercharged C6 with a custom Comp cam using LSL lobes. They LSL lobe style is somewhere between the LXL and LSK lobes when it comes to harshness on the valve train. That one ate a lobe or lifter at 40K miles.

Having said all that, I'm also a big fan of Cam Motion stuff. My current C6 has a custom Cam Motion cam with specs at 226/234 115+4 with .620 lift on both sides. It has 40K miles since we did the cam/heads swap. Changed the BTR springs and stock Chevy rocker arms at 30K miles with the same BTR springs and another set of stock rocker arms. No noticeable wear on rockers or springs when we did the swap.

 

Out of curiosity what kinda power big that make and how was the idle?

 

It made 500/454 on a dynojet. It had a lot more done to it besides cam and bolt ons. TxSpeed heads and mild cam build - CorvetteForum - Chevrolet Corvette Forum Discussion
Idle sounds rough with a little lope on occasion, but the engine runs smooth as far as manners and drivability go. On flat ground, it can cruise smoothly below idle speed in 6th gear.

 

I ordered a BTR stage 4 and on the cam it says Comp cams. Checked the part number and on Summit it states it is a BTR stage 4 cam.

 

How long ago?
Comp used to grind their cams but I’m pretty sure they went away from Comp recently, maybe a few years ago…. Their boxes no longer way Comp.

 

Comp Cams has lobes that will turn 8500 plus and are very smooth and they have stuff like the LSK that is very harsh but designed for a decent spring and light oem LS6 valves that are only 73 and 65 grams or so. I wouldn't use an LSK on anything with normal valves or springs of course but many people do and or did.