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

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Old 03-06-2009, 09:23 AM   #1
Isaacnc
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Exclamation Will LS3 aftermarket parts work with L99?

Hey guys,
I am getting a L99 (automatic) Camaro SS and I was wondering if the LS3 aftermarket parts will work and fit for my SS or are they going to make seperate parts for LS3 & L99. What do yall think/know?
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Old 03-06-2009, 09:29 AM   #2
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I think you will have to be careful with any valve train modifications. As the valve setup on the L99 is set up for the AFM. Otherwise you should be pretty safe with LS3 aftermarket parts.
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Old 03-06-2009, 12:54 PM   #3
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Short answer is some will, some won't. Most of the different parts are in the valvetrain.
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Old 03-06-2009, 03:20 PM   #4
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bolt-ons will all interchange. actual engine modification, no.

meaning, CAI, exhaust, headers, t/b, fuel injectors, etc will all interchange.

cams, rockers, heads, etc will need to be specific for the L99
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Old 03-06-2009, 09:25 PM   #5
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bolt-ons will all interchange. actual engine modification, no.

meaning, CAI, exhaust, headers, t/b, fuel injectors, etc will all interchange.

cams, rockers, heads, etc will need to be specific for the L99
For the most part, this will be true depending on the internal component. Stay tuned, we just ordered our project Camaro 2ss for testing, which will include product development for this platform (specifically the Auto with AFM/VVT) as we have done with the G8GT and then some.
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Old 03-06-2009, 09:28 PM   #6
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For the most part, this will be true depending on the internal component. Stay tuned, we just ordered our project Camaro 2ss for testing, which will include product development for this platform (specifically the Auto with AFM/VVT) as we have done with the G8GT and then some.
How do you find the time? Your alway's on g8 board and now here.
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Old 03-06-2009, 10:16 PM   #7
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you can always delete the afm and vvt on your l99 and convert it to ls3/2 parts, pretty simple swap and with software like hp tuners or efi-live you can delete out the afm/vvt from the ecm

my L99 is coming out right away and a LS3 is going in!
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Old 03-07-2009, 12:18 AM   #8
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How does the AFM work? Is the crank split when the cylinders shut off, or is the EFI and valves deactivated in the valvetrain and fuel delivery system during AFM mode? If so it'd just be a valvetrain swap, and ECM recalibration as you said, correct?
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Old 03-07-2009, 03:52 AM   #9
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so the rockers are different on th l99 so aftermarket ls3 rockers will not work, correct?,anyone know why this is, is it because of the afm?
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Old 03-07-2009, 07:33 AM   #10
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here is what you need to do to eliminate the afm/vvt and turn your l99 into a ls3 with your choice of camshaft

-choose a cam(any LSx 3 bolt)
-Get the correct length pushrods for your cam(LSx engines have non adjustable rocker arms and the lifter pre-load is set by using longer or shorter pushrods)
-get valve springs to match your cam(pac1218 or pac1518 are great beehive springs and are a direct swap)
-swap the cam sprocket(LS2 with 4x)
-swap the front cover(LS2/LS3 will work)
-swap the lifters(LS2/3/7)
-swap the lifter retainers(LS2/3/7)
-swap the valley cover (LS2/3 will work as long as it has the o-ring's to block off the afm towers in the valley)


buy hp tuners or efi live or have someone dyno tune and remove the afm/vvt from the ecm
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Old 03-07-2009, 08:28 AM   #11
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here is what you need to do to eliminate the afm/vvt and turn your l99 into a ls3 with your choice of camshaft

-choose a cam(any LSx 3 bolt)
-Get the correct length pushrods for your cam(LSx engines have non adjustable rocker arms and the lifter pre-load is set by using longer or shorter pushrods)
-get valve springs to match your cam(pac1218 or pac1518 are great beehive springs and are a direct swap)
-swap the cam sprocket(LS2 with 4x)
-swap the front cover(LS2/LS3 will work)
-swap the lifters(LS2/3/7)
-swap the lifter retainers(LS2/3/7)
-swap the valley cover (LS2/3 will work as long as it has the o-ring's to block off the afm towers in the valley)


buy hp tuners or efi live or have someone dyno tune and remove the afm/vvt from the ecm
Or buy an LS3 car!
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Old 03-07-2009, 09:46 AM   #12
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No, the rockers are the same, the lifters are different. We are getting the automatic because it has VVT/AFM, we developed camshafts to work with AFM aready, for the camaro we are going to get rid of AFM and create some custm cams to work with VVT, there are some pretty big advantages to having this VVT option, and I think that with tuning the VVT will make more power everywhere.
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Old 03-07-2009, 09:49 AM   #13
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Quote:
Originally Posted by mike@newera View Post
No, the rockers are the same, the lifters are different. We are getting the automatic because it has VVT/AFM, we developed camshafts to work with AFM aready, for the camaro we are going to get rid of AFM and create some custm cams to work with VVT, there are some pretty big advantages to having this VVT option, and I think that with tuning the VVT will make more power everywhere.

awesome. thanks for the heads up. now I know who to hit up with questions for tuning with AFM.
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Old 03-07-2009, 10:24 AM   #14
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Or buy an LS3 car!
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Old 03-07-2009, 06:03 PM   #15
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Or buy an LS3 car!


ya,, if they made an LS3 auto i would,, but they dont so im making my own!
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Old 03-07-2009, 10:23 PM   #16
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No, the rockers are the same, the lifters are different.
thanks, thats good news i thought i read that somewhere just wasnt positive.
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Old 03-09-2009, 09:39 PM   #17
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ya,, if they made an LS3 auto i would,, but they dont so im making my own!
Yea what he said............I order'd an automatic cause I'm doing a Turbo setup
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Old 03-11-2009, 04:22 PM   #18
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Yea what he said............I order'd an automatic cause I'm doing a Turbo setup
i'm not sure but with a turbo wouldn't you want a manual to keep the turbo spooled up, i always thought a supercharger was better with an automatic.
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Old 03-11-2009, 05:16 PM   #19
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I am replacing the L99 with a slightly modified LS3...
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Old 03-11-2009, 06:12 PM   #20
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I am replacing the L99 with a slightly modified LS3...
i wish i had 20k for that
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Old 03-11-2009, 07:47 PM   #21
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i wish i had 20k for that
I bet you will sometime. Believe me, this didn't happen overnight.
Enjoy what you have !!
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Old 03-11-2009, 08:12 PM   #22
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Maybe in 2011 the camaro/auto will have a box to check for another motor option say a LS3 or maybe even a LSA
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Old 03-11-2009, 09:16 PM   #23
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I bet you will sometime. Believe me, this didn't happen overnight.
Enjoy what you have !!
yeah i'm pretty wise with my money so eventually i will
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Old 03-11-2009, 09:57 PM   #24
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i'm not sure but with a turbo wouldn't you want a manual to keep the turbo spooled up, i always thought a supercharger was better with an automatic.
well, with the paddle shifting that the auto has, it should be easier to keep the boost up. altho no-lift shift is a nice feature in a manual
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Read that link that Spike posted, it'll tell you everything you need to know.
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Post count is truly an accurate measure of how cool someone is on the Internet.
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I piss excellence
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Nobody makes CamaroSpike happy. You just disgust him a little less than other people.
"You can think I'm wrong, but that's no reason to quit thinking.”
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Old 03-11-2009, 10:34 PM   #25
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Actually either would be much faster with an automatic transmission.
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