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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 01-07-2009, 09:26 AM   #1
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For the L99

I was reading an article in the latest editon of Chevy Hi Performance, and it had an article on new cams for the LSx engines. There was mention of two different companies coming out with cams just for the VVT/AFM LS motors that will allow you to keep it active with a cam change. One I had never heard of the other was Comp Cams. They have been doing work with the G8's system and were making over 420rwhp with there cams on these cars. Just thought id pass the info along to all here wanting the L99 and automatic.
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Old 01-07-2009, 09:34 AM   #2
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Thats good news!
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Old 01-07-2009, 02:44 PM   #3
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Excellent! Any hardcore gearheads got an opinion on Comp Cams? All I know is that it's a household name, so can't be that bad...but I'd rather hear from someone who has real hand-on experience with cams.
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Old 01-07-2009, 03:22 PM   #4
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^ I've never used one personally, but, My dad has used them repeatedly. As well as numerous other guys my dad ran around with.

They are great. They have great customer service. Custom grinds are pretty inexpensive, and the off the shelf stuff is ultra reliable when used for its purpose.

The've been doing it forever. They get my vote.
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Old 01-07-2009, 03:30 PM   #5
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Excellent...you stalker.
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Old 01-07-2009, 09:04 PM   #6
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That was us mentioned in Chevy High Performance with the DOD development stuff, can't wait to start testing our options on the new camaro.
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Old 01-08-2009, 12:42 AM   #7
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If I end up having to go with some custom grind cams for the V6, they'll definitely be from comp.
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Old 01-08-2009, 02:16 AM   #8
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I ended up ordering the automatic Camaro so that my wife is able to drive it. I will still be happy with it and will try at least one or two mods that doesn't mess up the factory warranty.. Would this mod be one of those or can it be done without affecting the warranty?
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Old 01-08-2009, 03:28 AM   #9
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Most likely it would mess up the warranty. I'll let somebody more versed give a more solid answer though.
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Old 01-08-2009, 04:34 AM   #10
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I never do understand why all the "ONLY V8" people come all the way over to the V6 forum - Xanthos
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Old 01-08-2009, 04:37 AM   #11
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Most likely it would mess up the warranty. I'll let somebody more versed give a more solid answer though.
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If thats the case, the extra HP isn't worth the risk on such an untested and new automobile..
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Old 01-08-2009, 04:46 AM   #12
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I demand your blatant misquotation be removed at once and an apology be issued! In that post I was talking about them coming over to the V6 forum just to bash the V6 croud. I was making a constructive comment.

And yes, I have a feeling that any non-GMPP cam swap will void the powertrain warranty.
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Old 01-08-2009, 05:34 AM   #13
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Comp Cams is great. I used one of there HR grinds for my stroker engine and its a great cam. Made good power peak and through out the range. Id use them again without a second thought.

Last edited by Hesh; 01-08-2009 at 09:51 AM.
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Old 01-08-2009, 05:41 AM   #14
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I am interested in stuff like this for my L-99, but I will wait till the warranty is up on the car.
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Old 01-08-2009, 05:50 AM   #15
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Seems like a good plan.

I've never really thought of it - how long is the GM's PT warranty anyway?

*shuffles off to go look it up*
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Old 01-08-2009, 06:19 AM   #16
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5 year 100,000 miles.

So basically I would mess with stuff like this after the warranty is up and the car is paid off.
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Old 01-08-2009, 06:45 AM   #17
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I guess 5 years isn't too long to wait to do a cam swap.

Then again, I have to wait for somebody to come out with cams for the V6 anyway. Or for GM to release the cam blanks.
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Old 01-08-2009, 08:24 AM   #18
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Originally Posted by XanthosV6 View Post
I demand your blatant misquotation be removed at once and an apology be issued! In that post I was talking about them coming over to the V6 forum just to bash the V6 croud. I was making a constructive comment.

And yes, I have a feeling that any non-GMPP cam swap will void the powertrain warranty.
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And the GMPP cam will too. All cams void the warranty, and with the black box, they can know if you reprogrammed the ecu. The ECU, and TCM, in auto's, will limit power output. It's called Torque Management. It will pull timing and limit the throttle under hard acceleration and driving. They will give you 399-422 HP, but will dictate when and how you can use it. This limits our cars true potential.

I've worked on LSX engines for years and will tell you from first hand experence, the GM cams are crap compared to after market cams, and Comp is one of the best, but I prefer custom ground
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Old 01-08-2009, 08:26 AM   #19
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Looking at the LSX cams offered on Comp Cams website, which one could be potentially used on the L99?
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Old 01-08-2009, 09:07 AM   #20
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Looking at the LSX cams offered on Comp Cams website, which one could be potentially used on the L99?
That depends on the combination of mods you will have, desired driveability, and power band you want.

There are a lot of variables to take into account.

I personally will probably go twin turbo. The cam will be some wheres around a 224/234 @.050 on a 114 or 116 LSA. The lift will be about .567/.580. I will use the Comp 921 dual springs, and yes the cam will be from Comp also.

The LS3 heads don't like a lot of over lap.

Now if i were going NA with long tube headers like kooks, I would go with a 230-240 duration on a 114 LSA with .590-.610 lift.

BTW, I would make or buy a better CA intake than the GMMP POS. JMOO
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Old 01-08-2009, 09:13 AM   #21
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But would that cam keep AFM usable? I get the impression that was an implied part of his question.
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Old 01-08-2009, 09:19 AM   #22
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But would that cam keep AFM usable? I get the impression that was an implied part of his question.
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Yes it should. They will retain the sensor locations
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Old 01-08-2009, 09:29 AM   #23
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Yes it should. They will retain the sensor locations
Well, that certainly seems like good news!
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Old 01-08-2009, 09:59 AM   #24
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No they wont unless specificaly designed for the AFM/DoD/VVT models. I dont think they have actually released these cams as of yet. The cams you mentioned for the other ls series do not take into account the VVT. As of right now they only have 4 of these cams. Here is the link to take a look. http://www.compcams.com/Technical/Ca.../pdf/page9.pdf




Edit: I stand corrected, they are able to be ordered at about $500 a piece.

Last edited by Hesh; 01-08-2009 at 10:11 AM.
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Old 01-08-2009, 10:04 AM   #25
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No they wont unless specificaly designed for the AFM/DoD/VVT models. I dont think they have actually released these cams as of yet. The cams you mentioned for the other ls series do not take into account the VVT. As of right now they only have 4 of these cams. Here is the link to take a look. http://www.compcams.com/Technical/Ca.../pdf/page9.pdf
This is what I had originally assumed, seeing how GM couldn't use the stock LS3 cam because it interfered with AFM - hence the L99.
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