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

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Old 08-01-2008, 07:10 PM   #1
str8himalaya
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Question LS3/L99 Question...

Are they pretty much the same engine? I mean will the same aftermarket parts (headers, cams, CAI, etc.) going to fit the exact same on both engines? I want a premier engine, but i would prefer the auto w/tapshift as a transmission. Any help?
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Old 08-01-2008, 08:05 PM   #2
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The last L99 was a slightly modified LT1. I don't know anything about this one.
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Old 08-01-2008, 08:14 PM   #3
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I thought it had been stated they are the same engines save the L99 was modified for AFM?
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Old 08-01-2008, 08:18 PM   #4
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There is an entire thread in the Engine section of this board on the L99 and AFM and the implications thereof, as well as any number of other random ramblings (especially the ones from me!):

http://www.camaro5.com/forums/showthread.php?t=5181

It is essentially the LS3 with AFM and associated goodies, it is a 6.2, but there MAY be some issues with modding it, then again maybe not...There is a lot in the thread above>
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Old 08-01-2008, 08:23 PM   #5
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Quote:
Originally Posted by str8himalaya View Post
Are they pretty much the same engine? I mean will the same aftermarket parts (headers, cams, CAI, etc.) going to fit the exact same on both engines? I want a premier engine, but i would prefer the auto w/tapshift as a transmission. Any help?
They are both 6.2 L engines. The L99 is auto only with AFM and has a rev limiter at 6000 rpm.
The LS3 is pretty much the 'Vette engine that is only available with the 6-speed manual... limited to 6600 rpm

They both utilize LS7 heads and larger ports/valves.

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Old 08-02-2008, 03:02 AM   #6
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Quote:
Originally Posted by jmliptak View Post
There is an entire thread in the Engine section of this board on the L99 and AFM and the implications thereof, as well as any number of other random ramblings (especially the ones from me!):

http://www.camaro5.com/forums/showthread.php?t=5181

It is essentially the LS3 with AFM and associated goodies, it is a 6.2, but there MAY be some issues with modding it, then again maybe not...There is a lot in the thread above>
People aren't having problems with their G8GT's, so I think we should be ok.
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Old 08-02-2008, 03:31 AM   #7
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Quote:
Originally Posted by str8himalaya View Post
Are they pretty much the same engine? I mean will the same aftermarket parts (headers, cams, CAI, etc.) going to fit the exact same on both engines? I want a premier engine, but i would prefer the auto w/tapshift as a transmission. Any help?
Thread moved to proper forum.
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Old 08-02-2008, 04:47 AM   #8
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Quote:
Originally Posted by garfin View Post

They both utilize LS7 heads and larger ports/valves.
the engines use L92 heads which were originally truck heads. not the ls7 heads
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Old 08-02-2008, 09:30 AM   #9
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the engines use L92 heads which were originally truck heads. not the ls7 heads
They are very very close in design and are prolly the best flowing heads gm has ever made.
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Old 08-02-2008, 08:04 PM   #10
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Quote:
Originally Posted by The_Blur View Post
The last L99 was a slightly modified LT1. I don't know anything about this one.
technically, it was a reduced modification LT1...lol due to the smaller bore of the l99 it didnt need the extra boring out that the 5.7 needed...


however, this L99 is the same block as the LS3, its pretty much the same motor overall, with the exception of the cam being slightly different and the AFM added to it.


Quote:
Originally Posted by headpunter View Post
the engines use L92 heads which were originally truck heads. not the ls7 heads
Quote:
Originally Posted by o2camaross View Post
They are very very close in design and are prolly the best flowing heads gm has ever made.

L92 heads are FTMFW
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