[Z06] Cams!!??

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Jul 9, 2012 | 12:44 PM

#21

AU N EGL

Team Owner

Joined: Sep 2003

Posts: 43,084

Likes: 33

From: Raleigh / Rolesville NC

Quote:

Originally Posted by LSOHOLIC

I have a few o-scope graphs of the 55mm base lobes profiles showing ramp intensity...if you'd like to see them.

Also...I'd be willing to bet that your combo would pick up power with a rocker, spring and cam change....under the curve.....

Thanks....and sorry if facts give you a headache.....

Power under the curve is where it is at. I like to see the o-scope graphs

TIA

Jul 9, 2012 | 05:56 PM

#22

LSOHOLIC

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Joined: Nov 2009

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Likes: 15

Quote:

Originally Posted by AU N EGL

Power under the curve is where it is at. I like to see the o-scope graphs

TIA

PM sent....

Thanks......

Jul 9, 2012 | 06:35 PM

#23

zeevette

Race Director

Joined: Sep 2005

Posts: 11,060

Likes: 291

From: Pasco WA

Detailed cam information may put some to sleep, but I think it's important to know what your motor is doing, and I rely on guys like LSOHOLIC to give me data, along with researching on my own. Since the LS is a pushrod motor, cam selection is vital.

Jul 9, 2012 | 06:52 PM

#24

LSOHOLIC

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Joined: Nov 2009

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Quote:

Originally Posted by zeevette

LOL....to sleep is correct.....LOL.

I'm no pro...I just pay attention to details and listen to the pro's who are will to give a little of their knowledge.

There is a lot of knowledge and opinions out there.....I just try and think logically about it and decipher the sales man from the gearhead/cam enthusiast.

Here is one for ya zeevette......dont fall asleep....LOL...interesting stuff on radius of gyration....

http://www.tech.plym.ac.uk/sme/desnotes/valvet1.htm

Thanks..............

Last edited by LSOHOLIC; Jul 9, 2012 at 06:54 PM.

Jul 9, 2012 | 07:04 PM

#25

REDZED2

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Joined: Sep 2005

Posts: 2,568

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From: Winnipeg

Quote:

Originally Posted by LSOHOLIC

http://www.tech.plym.ac.uk/sme/desnotes/valvet1.htm

Thanks..............

Listen Im not denying what you say technically, but the butt dyno would have a very hard time telling the difference. There have been a couple threads on dissapointing dyno results with these new "lobe" cams. Not mentioning anyone or any brand. Yes perhaps in the long run the valvetrain on the average LS motor might show less wear but apples to apples.... its a never ending circle and theres more to life... like driving our corvettes!

Jul 9, 2012 | 07:16 PM

#26

LSOHOLIC

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Joined: Nov 2009

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Quote:

Originally Posted by wantbluC6

Your absolutely correct......
I tend to error on the "over analyze" side of things. Kind of a attention to detail kind of guy. Some are not.......

Enjoy your vette.......

Thanks.......but please dont let a mis-matched cam ruin your prospective on lobe tech/evolution.....

Jul 10, 2012 | 01:39 PM

#27

AU N EGL

Team Owner

Joined: Sep 2003

Posts: 43,084

Likes: 33

From: Raleigh / Rolesville NC

Quote:

Originally Posted by LSOHOLIC

PM sent....

Thanks......

Damn that is great stuff.

I look at it from what cams I see fail on a road course / track day engine. Most of the cams are drag race cams or the latest and greatest dyno king cams.

243 heads with cams above a .600 lift. even have seen quite a few LS7 heads with cam lifts above .600 fail

and LS3 heads with big chambers have there own oiling challenges let alone cam selections.

Yes the cam is far more then the lift, as the reading entails.

some of the best road race cams still only have a lift in the .570 range, but do they flow well at .200 and .300 lift and easy of the valve train.

Last edited by AU N EGL; Jul 10, 2012 at 01:47 PM.

Jul 10, 2012 | 02:51 PM

#28

golfinz

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Joined: Jul 2007

Posts: 2,087

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From: Austin TX

Quote:

Originally Posted by AU N EGL

I agree, if you are road racing/spending a lot of time in the high rpms, I would not chose a cam that has high ramp speed/lift. I would pick something in the .570-.590 range with a lobe that is gentler on the seats.

A note should be added, with my cam, and any cam with high lift/ramp speeds, valve springs will need to be replaced more often than cams that have "softer" valve geometry