For the L99 - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Xanthos · 01-08-2009, 06:50 AM

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*
- Xanthos

Scott@Bjorn3D · 01-08-2009, 07:19 AM

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.

Xanthos · 01-08-2009, 07:45 AM

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.
- Xanthos

1967rsss · 01-08-2009, 09:24 AM

Quote:

Originally Posted by XanthosV6

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.
- Xanthos

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

Croathlete · 01-08-2009, 09:26 AM

Looking at the LSX cams offered on Comp Cams website, which one could be potentially used on the L99?

1967rsss · 01-08-2009, 10:07 AM

Quote:

Originally Posted by Croathlete

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

Xanthos · 01-08-2009, 10:13 AM

But would that cam keep AFM usable? I get the impression that was an implied part of his question.
- Xanthos

1967rsss · 01-08-2009, 10:19 AM

Quote:

Originally Posted by XanthosV6

But would that cam keep AFM usable? I get the impression that was an implied part of his question.
- Xanthos

Yes it should. They will retain the sensor locations

Xanthos · 01-08-2009, 10:29 AM

Quote:

Originally Posted by 1967rsss

Yes it should. They will retain the sensor locations

Well, that certainly seems like good news!

- Xanthos

Hesh · 01-08-2009, 10:59 AM

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.

Xanthos · 01-08-2009, 11:04 AM

Quote:

Originally Posted by Hesh

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.
- Xanthos

Hesh · 01-08-2009, 11:13 AM

Now if you wanted to its already been performed you can turn the AFM off and its basically a LS3. Why you would do that when you can keep the AFM active make great hp and still get 23 mpg...

mike@newera · 01-10-2009, 03:07 PM

As far as I knew, we were the only ones that offered a specific cam that worked still retaining AFM, we did all of the development with our project G8GT vehicle 6 months ago and currently offer 2 cams that work with AFM that range from a 40-55 rwhp increase with good street manners. In order to run more than "X" amount of lift, a proprietary lobe had to be designed in which we wroked with FTI on doing and testing, hence the mentioning of this in Chevy High Performance magazine. Too much lift, and using the wrong lobe moves the lifter past the oil galley in the lifter bore. We will be doing testing on the L99 camaro as soon as we can get our hands on one as well. So, don't think you can just put any cam in this engine with nothing to worry about. Another thing we have done is getting rid of the AFM, and using slightly larger cams, and in doing so it really did not decrease the mpg much at all, only about 2 mpg on average in most scenarios, depending on how it is driven. The AFM is very much so activated based on load to an extent, plus TPS% and rpm windows, so if you drive it fairly hard, it will never come on, if you do a lot of highway driving at around 60-65 mph it will come on quite often, but generally above 70-75+ mph it will hardly come on at all because of the amount of engine load it takes to maintain this speed, unless you have a tail wind or going down a hill.

Hesh · 01-10-2009, 05:52 PM

Nope you are not the only ones. There is a link on the first page from Comp Cams that show they have also produced cams for the system. They were also mentioned in the same article you were in. They were the first cam company mentioned and one of the two mentioned to keep the afm active with a cam swap. There was quite a large portion of that article give to Comp Cams for their work.

01-08-2009, 06:50 AM	#15
Xanthos PWA Relapse Drives: Formerly-Stick Join Date: Mar 2008 Location: Oklahoma Posts: 12,588 View My Garage	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 - Xanthos __________________ 2017 1LT/RS A8 Hyper Blue Metallic

01-08-2009, 07:45 AM	#17
Xanthos PWA Relapse Drives: Formerly-Stick Join Date: Mar 2008 Location: Oklahoma Posts: 12,588 View My Garage	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. - Xanthos __________________ 2017 1LT/RS A8 Hyper Blue Metallic

01-08-2009, 10:13 AM	#21
Xanthos PWA Relapse Drives: Formerly-Stick Join Date: Mar 2008 Location: Oklahoma Posts: 12,588 View My Garage	But would that cam keep AFM usable? I get the impression that was an implied part of his question. - Xanthos __________________ 2017 1LT/RS A8 Hyper Blue Metallic

01-08-2009, 10:59 AM	#24
Hesh Drives: 2010 IOM Camaro Vin 34334 Join Date: Oct 2008 Location: Arlington, TX Posts: 566	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 11:11 AM.

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01-08-2009, 07:19 AM	#16
Scott@Bjorn3D Drives: Kami, 2013 2SS LS3 Luvin Join Date: Oct 2008 Location: Eufaula, Alabama Posts: 6,427	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.

01-08-2009, 09:26 AM	#19
Croathlete Danny Drives: 2010 Camaro 2SS/RS Join Date: Nov 2007 Location: NYC Posts: 1,656	Looking at the LSX cams offered on Comp Cams website, which one could be potentially used on the L99?

01-08-2009, 11:13 AM	#26
Hesh Drives: 2010 IOM Camaro Vin 34334 Join Date: Oct 2008 Location: Arlington, TX Posts: 566	Now if you wanted to its already been performed you can turn the AFM off and its basically a LS3. Why you would do that when you can keep the AFM active make great hp and still get 23 mpg...

01-10-2009, 03:07 PM	#27
mike@newera Drives: 2016 Camaro SS Join Date: Jan 2009 Location: Rochester, NY Posts: 529	As far as I knew, we were the only ones that offered a specific cam that worked still retaining AFM, we did all of the development with our project G8GT vehicle 6 months ago and currently offer 2 cams that work with AFM that range from a 40-55 rwhp increase with good street manners. In order to run more than "X" amount of lift, a proprietary lobe had to be designed in which we wroked with FTI on doing and testing, hence the mentioning of this in Chevy High Performance magazine. Too much lift, and using the wrong lobe moves the lifter past the oil galley in the lifter bore. We will be doing testing on the L99 camaro as soon as we can get our hands on one as well. So, don't think you can just put any cam in this engine with nothing to worry about. Another thing we have done is getting rid of the AFM, and using slightly larger cams, and in doing so it really did not decrease the mpg much at all, only about 2 mpg on average in most scenarios, depending on how it is driven. The AFM is very much so activated based on load to an extent, plus TPS% and rpm windows, so if you drive it fairly hard, it will never come on, if you do a lot of highway driving at around 60-65 mph it will come on quite often, but generally above 70-75+ mph it will hardly come on at all because of the amount of engine load it takes to maintain this speed, unless you have a tail wind or going down a hill.

01-10-2009, 05:52 PM	#28
Hesh Drives: 2010 IOM Camaro Vin 34334 Join Date: Oct 2008 Location: Arlington, TX Posts: 566	Nope you are not the only ones. There is a link on the first page from Comp Cams that show they have also produced cams for the system. They were also mentioned in the same article you were in. They were the first cam company mentioned and one of the two mentioned to keep the afm active with a cam swap. There was quite a large portion of that article give to Comp Cams for their work.