For an everyday driver I would never trade my L99. That said, with a Roto-Fab CAI, Dynatech LT Headers, HF cats, Corsa Exhaust and a Jannetty tune, she is a bit over what a stock LS3 will get you and from what I have seen, the L99 needs less HP to keep up with the manual.
On paper it may look like a weaker design but in the real world, its not really that way.
Again, saying that, My plans include an LSX376 long block with a Magnacharger 2300 bolted on in the next few years. That engine is made for high boost applications so turn up the boost and you could smoke anything that the stock LS3 with Blower could produce and likely last alot longer.
There is an Unopened L99 with magnacharger and some other add ons here on Camaro5 that is running in the solid 10.5 sec, 1/4 mile range. Most impressive, and thats with only around 550 HP to the ground.
Don't cry to hard to use L99 drivers.
On a side note, I turned off the AFM system and get better milage now then before with the Jannetty tune, plus with the torque management systems turned off basically, its a totally different car.
Yes the L99 is pretty de-tuned, but all that means is that there is ALOT of room for improvement!!!!
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Fiftydriver
2010 SSRS, RJTC, L99, Maggie 2300 SC, 3.4" pulley, Roto-Fab CAI, Dynatech Supermaxx LT headers, Dynatech High Flow cats, Corsa Cat back exhaust, Dual Elite Engineering catch can, MSD wires and Jannetty custom tune, JRE custom diff w/ posi mod, 3.91 LPE gears, Pfaht trailing arms, Pfaht trailing arm and Diff bushings, drop springs and sport sway bars front and back, Fesler dual guage pillar pod w/ AM Cobalt Boost and A/F guages.
More to come!!