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

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Old 01-20-2009, 06:59 PM   #1
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LS3 vs. L99

Ive already ordered my car with the LS3 Manual, obviously. But what I wanna know is what everyone has been reading and figuring would be better about the L99 before the car is made I really wanna be sure I am getting the better of the options.

What I know:
L99 LS3
Auto Manual
400 Hp 422 Hp
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Old 01-20-2009, 07:03 PM   #2
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L99 will have the Active Fuel Management. Along with that, it will have different tuning (I believe a different cam also) and a different exhaust note.

EDIT: BTW, the LS3 is rated at 426HP per the most recent update.
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Old 01-20-2009, 07:34 PM   #3
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no real significant difference. if you want an auto get the l99, if you want the manual get an ls3. They are 99% the same, + a different transmission. so it all comes down to the personal preference.
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Old 01-20-2009, 08:02 PM   #4
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Performance should be nearly identical.
And the L99 will give you one more mpg hwy.
But it's also a $995 option.
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Old 01-21-2009, 09:30 AM   #5
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426 horse' for the LS3 now, but no biggie.

I think the LS3 is easier to modify because it's less complex. No AFM or VVT. No complaints about the exhaust sound going strange when in 4 cylinder mode or whatever. This is just what I've read.

I think the small difference in performance will be less than many people think. Shoot, that argument would change completely if a person would add a big stall to an auto'.
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Old 01-21-2009, 09:41 AM   #6
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They are so equal that your best bet is to go with your gut. There are several threads discussing these engines already on the forums, so you may want to do a search to get the most answers.
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Old 01-21-2009, 09:59 AM   #7
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Just hoping that the L99 doesn't impede my hopes of adding either a supercharger or a turbo sometime in the future...
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Old 01-21-2009, 10:52 AM   #8
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Appears the difference is even less than it seemed a short while ago with the latest torque figures being 410(bumped from 395) - L99 and 420 - LS3.

And you get remote start with the 2LT and 2SS with auto trans - 1LT also if the C&C Package (SRJ) is ordered.
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Old 01-21-2009, 11:39 AM   #9
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Quote:
Originally Posted by Croathlete View Post
Just hoping that the L99 doesn't impede my hopes of adding either a supercharger or a turbo sometime in the future...
How would Active Fuel Management play with a supercharger or a turbo? Could there be a problem with that combination?

Just curious. I'm going with an LS3 on mine, no questions.
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Old 01-21-2009, 01:30 PM   #10
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Searched for "supercharged afm'

Quote:
Originally Posted by JusticePete View Post
Yes you can use F/I with the AFM system. Mine has been working flawlessly for months. Including dyno testing, auto-crosses, road courses, drag strips, highway and city driving my L76 G8 is delivering 19.1 MPG and now is at 480 RWHP.
See this post in this thread:

Can you S/C an active fuel mgt engine?

Another helpful thread.

LS3 vs L99 (old)
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Old 01-21-2009, 05:41 PM   #11
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Ah yes, the forum's search feature. Quite helpful way to find many answers quickly.
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Old 01-21-2009, 07:46 PM   #12
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Whoa. Search?!

Thanks for the links, and the reminder to check before posting inane questions.
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Old 01-21-2009, 10:39 PM   #13
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No prob Grey!

Enjoy!
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