Has anyone used these? I recieved a fax from comp cams about these new lobes and they sure have some lift!
Phil

 

can you post the lifts or a comparison to the X-er lobes? Maybe at 224, 232, 240 durations so we can get a flavor of how they compare.

 

Dur: 1.7-1.75-1.85
223 .636 .655 .692
231 .643 .662 .699
239 .649 .669 .707
247 .656 .676 .714

 

I'm running the LSK 243 duration lobes on a single pattern .653 lift w/ PRC duals and Morel lifters. Has .200" duration numbers close to XE-R 248 lobe, so it ramps aggressively after .050. They are about as close to solid roller performance w/ a hydraulic setup that I could find. I don't expect a lot of mileage out of the springs (10-15K?) but I like the way it hits and PRC's are not that expensive.

 

I've got them on the intake of my TRak cam! Revs like a ****!

 

Here are the specs on the whole series:

Comp Cams LSK lobes
Lobe#, Dur. @ .006", .050", .200", & Lift w/1.7 rocker
2124 265 215 142 .629"
2125 269 219 145 .632"
2126 273 223 149 .636"
2127 277 227 153 .639"
2128 281 231 156 .643"
2129 285 235 160 .646"
2130 289 239 164 .649"
2131 293 243 168 .653"
2132 297 247 171 .656"
2133 301 251 175 .660"
2134 305 255 179 .663"
2135 309 259 183 .663"
2136 313 263 186 .663"

 

They will custom grind anything you need...

 

I've been thinking about doing a 215/219 .629/.632 115+0 with a set of PRC 5.3 heads on my wife's car. I wonder how good it would idle and if it would be ok on P/V with the 5.3 heads unmilled??

 

Use the "Dial" Gomer

 

What springs would you use on a .650" lift cam???
Phil

 

Lift doesn't affect PTV. Duration and LSA do. That cam would clear no problem.

 

LSK lobes are radical. They are designed to be "done" by 6500rpm max. In other words, they are some valve floatin *****.

 

PRC "Platinum" .670 lifts.

 

I think I may order one and try it out. The car has all bolt ons, 100hp dry kit, and a 3400 stall with 3.23 gears.

 

That statement is absolutely FALSE. The LSK lobes were designed by Comp to have more high rpm stability than XE or XE-R lobes.

XE-R lobes are 49 degrees from .006" to .050". That's fast.
LSK lobes are 50 degrees from .006" to .050. Not quite as fast.

Where the LSK lobes shine is the arc they form from .050" to peak lift. According to Comp, the LSK lobes better follow the natural arc of the cam. See, fast ramps and low lift (like an XE-R lobe) make the lifter want to "loft" off of the cam lobe. By adding more lift into the lobe design, Comp feels they can get more stable rpm ability.

My new Thunder Racing TRak Cam uses the 231 LSK lobe on the intake and it revs to the freakin' moon. I need to raise my rev limiter ASAP because the 6800 rpm redline feels like 6000. It would go 7500 no problem. For rev assurance, I'm running Comp 921 springs, but I could have shimmed my duals that came with my AFR 205s and been fine.

 

This thread got some quick post.....

 

What testing would that be?

 

Somehow I knew you'd make it in here. LOL.

This is true but at those durations it would take a bunch of lift to run into PTV problems. Especially with that LSA. Or if you put it in super advanced or retarded.

 

That has the same rate as Cam Motion intake lobes on some FM cams I've seen.

 

Well can you shed some light on these new lobes?