LS3 vs. L99 internals??? - ModernCamaro.com - 5th Generation Camaro Enthusiasts
V8 Engine Discussion 6.2L LS3/L99 V8 | Exhaust | Ignition | Induction | Intakes

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post #1 of 20 Old 07-21-2008, 03:03 PM Thread Starter
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LS3 vs. L99 internals???

I'm curious as to what makes the L99 different from the LS3 internally to make a difference in HP/TQ. I want to know the engine specs, dammit!

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post #2 of 20 Old 07-21-2008, 03:06 PM
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You and me both brother.
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post #3 of 20 Old 07-21-2008, 03:07 PM
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I think they are identical other than the L99 havnig AFM & VVT.
AFM is the reason for less power on the L99.

I'm wondering how the L99 will wake up to a tune.
G8 GTs are picking up 35+ RWHP - AND 3-4MPG by making AFM more aggressive.

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post #4 of 20 Old 07-21-2008, 03:22 PM
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Is there a programmer for the LS-3 and who makes it?
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post #5 of 20 Old 07-21-2008, 03:42 PM Thread Starter
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Quote:
Originally Posted by mdennis09 View Post
Is there a programmer for the LS-3 and who makes it?
The DiabloSport Predator is a phenominal piece....hopefully we can have a hand held shortly after release of the Camaro if there are similar electronics with the existing G8.

Not too sure if that's the one tweaking the G8's.

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post #6 of 20 Old 07-21-2008, 03:52 PM
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Hand held tuners are ok for stock to mildly modified cars. I think that the Diablo has down-loadable/mail order program capabilities.

I'm sure all the big name shops will be ready for us when we need a good dyno tune.
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post #7 of 20 Old 07-21-2008, 04:31 PM Thread Starter
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Actually, the DiabloSport hand-helds are pretty darn good. I'm able to datalog approximately 30 minutes of drive time, save it to a file, send it to my tuner and he can make a custom tune via CMR software and send it back. Great results and safe with the A/F's if the tuner knows what he's doing. This is on a heads/ cam / big injector/ converter/ long tube car.

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post #8 of 20 Old 07-21-2008, 05:47 PM
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HP Tuners is also already out with LS3 programming software for Corvettes, so I'd imagine they'll have it ready for the Camaro pretty fast.

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post #9 of 20 Old 07-21-2008, 06:44 PM
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Quote:
Originally Posted by OctaneZ28 View Post
HP Tuners is also already out with LS3 programming software for Corvettes, so I'd imagine they'll have it ready for the Camaro pretty fast.
HP Tuners FTW!... Did wonders for the LS2 in my Trailblazer...

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post #10 of 20 Old 07-21-2008, 08:56 PM
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Full process, when someone does it, please! I'm a noob when it comes to doing mods like this.

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