Carlos_Garza

I was reading the specs on the new 2010 Camaro and the 6 speed automatic comes out with the L99 6.2L engine with 400 hp. The 6 speed manual comes out the LS3 6.2L engine with 426 hp.

Both engines are 6.2L engines.

My question is, what is the difference between the L99 and LS3 engine?

Thanks

jmurray87

iTrader: (1)

The L99 is actually a 6.0L, and has active fuel management....other then that not sure.

racerns

No the L99 is a 6.2L the L76 is the 6.0. I don't know all the details but the L99 is basiclly a LS3 with the AFM (active fuel management) which means that it has a special set of lifters that can be deactived to turn off a cylinder. The AFM lifters are limited in the amount of lift it can take and rpms it can handle so the L99 probably has a smaller lift cam and lower redline than the LS3.

rayhawk

The L99 also has variable valve timing to improve efficiency and performance. Basically the extra mass of the valvetrain requires a lower redline- i think 6000 for the L99 vs 6600 for the LS3 and I believe it has a slightly milder cam as well. The auto is geared more aggressively though to compensate for this and puts out pretty close performance numbers to the Manual car.

enginjoe

iTrader: (11)

There was a pretty extensive thread in this section a while back. A quick search will give all the details.

SilverBullet73

iTrader: (2)

Not to mention that Comp Cams also has variable valve timing cams available already and I'm sure more will be out in the future as well. Although the auto seems like it's lacking stock, I think it will be a surprisingly strong performer and even more so when a nice cam is added or a nice stall. Heck, even a tune would wake it up with all that torque management GM likes to program in there. Either way, you can't go wrong!

Tainted

iTrader: (9)

the auto was faster 0-60 than the manual. the L99 is DOD

jmurray87

iTrader: (1)

djsanchez2

iTrader: (14)

I'd love to get my hand on an A6 and disable the the AFM, then add a cam and tune the VVT for max power across the board. Mast and Comp have both made HUGE gains using this new tech, so much so that mast is outfitting the LSX block w/ VVT.

cookba

iTrader: (10)

im glad they are getting allot of performance items on the market for the Camaro. Livernois dynoed the SS and only got something like 36x's rwhp. Have you seem Mast's engine packages DAMN!!!!!!!!!!!