10-29-2008, 02:07 AM | #1 |
Drives: 2003 Evo(450hp) , 95 CamaroZ28 Join Date: Oct 2008
Location: Illinois
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Tuning LS3 vs L99
Hi I just wanted your opinion on how hard it will be to modify/tune the L99 vs the LS3. I know that the LS3 already has a large aftermarket following, do you think the L99 will as well, or will the AFM keep it from reaching the aftermarket status of the LS3? Has anyone worked with AFM cars before? I'd like the L99 as I prefer auto for the drag strip(although I enjoy and currently have a manual vehicle) however I'm wondering if having the L99 will defeat the purpose.:(
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10-29-2008, 02:18 AM | #3 |
Drives: 2003 Evo(450hp) , 95 CamaroZ28 Join Date: Oct 2008
Location: Illinois
Posts: 72
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I see.. so you would have to disable AFM then. So any chance of saving gas vs the manual would be gone. What would have to be done to recuperate the power the 22 hp that was lost vs the ls3?
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10-29-2008, 02:25 AM | #5 |
Drives: 2003 Evo(450hp) , 95 CamaroZ28 Join Date: Oct 2008
Location: Illinois
Posts: 72
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Hmmm... after doing that then the parts will be interchangeable?
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10-29-2008, 06:46 AM | #7 |
i thought i read that the cam profile was different for the l99, not as much lift thats why, the redline is different... but everything else is exactly the same
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10-29-2008, 06:59 AM | #8 | |
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10-29-2008, 07:06 AM | #9 |
10-29-2008, 09:28 AM | #10 |
Petro-sexual
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It sounds like the AFM is defeatable because I remember reading a little about the development of the Maggy' 1900 on the G8's 6.0 and they were saying, if I'm not mistaken, that they could turn it off if they needed to, although they were trying to run the car with it on to see if they could.
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10-29-2008, 11:17 AM | #11 |
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Check out G8board.com. There are some there who have s/c'd their AFM powered G8 GT's. There will be no shortage of aftermarket tuning parts for the L99 Camaro.
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10-29-2008, 05:36 PM | #12 |
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I am doing some speculating here, but I believe if you put the standard LS3 cam/lifters in the L99 you could gain back the 22hp, and most likely safely move the rpm limit up to 6600-the same as the LS3. May as well do this if you are going to tune out the AFM mode anyway. With the more aggressive gearing of the auto car this would be one nice mod. Of course, economy would suffer but oh well. The only thing I am not sure about in terms of raising the rpm limit is the VVT setup, but I don't see why that would hurt, I think the timing is most likely fixed above a certain rpm/load anyway.
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10-29-2008, 06:05 PM | #13 |
Petro-sexual
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Aren't the cams different between the two too?... Better watch where you're shifting that tranny also.
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10-29-2008, 07:06 PM | #14 |
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Yes, the L99 has a less aggressive cam, that is what I meant, to put a LS3 cam and lifters in to get the LS3 with the auto, effectively. Of course, to go to that trouble you may as well step up to the hot cam anyway. I don't know much about automatic transmissions, but why would that extra rpm be a problem? Does'nt the vette use a similar auto trans (obviously rear mounted) and have a 6500 rpm redline?
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