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Old 09-14-2011, 02:09 AM   #1
Judge
 
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How would you add power to your L99?

Which way do you prefer to add power to your L99 engine?

Forget about forced inductions, I want to know about your mods like Camshafts, Piston Heads, and so on.

Been researching camshafts for the L99 and found out they're pretty tricky due to the Active Fuel Management and other electronics in the engine.

So It'd be interesting to know your methods of adding more horses.
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Old 09-14-2011, 03:23 AM   #2
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You can ad a CAI, longtube headers and do the L99 to LS3 conversion. Vengenace Racing is telling me that would get me 420-440 at the back wheels. If I got 440 that would be 100 more HP than I have now at them.
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Old 09-14-2011, 06:13 AM   #3
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See signature. Yes, the L99 to LS3 conversion is more, but worth it in my opinion. However, there are now some pretty stout numbers using a VVT cam. My concern with the VVT cam (unfounded of course) is durability.
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Old 09-14-2011, 07:08 AM   #4
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More on the L99 to LS3 conversion please (details)

Also, don't you think wen you convert your engine to an LS3, you kinda lost its true identity as an L99 automatic? Thats my opinion though




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Old 09-14-2011, 08:10 AM   #5
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Quote:
Originally Posted by Judge View Post
More on the L99 to LS3 conversion please (details)

Also, don't you think wen you convert your engine to an LS3, you kinda lost its true identity as an L99 automatic? Thats my opinion though
You still have lower compression pistons.

L99 to LS3 conversion involves deleting the AFM/DOD.
From TSP ($390): LS2 Chain Dampener, Qty 8 (or 16) LS7 Lifters, LS2 Lifter Trays, LS3 Head Gaskets, GM LS2 Head Bolts, LS3 Valley Cover, PCV Hose, PCV Plug, Cam Swap Gasket Kit.

Deleting the VVT:
(From TSP $110) LS3 Front Timing Cover with Cam Position Sensor and Harness, 3-Bolt Cam Gear (4X), and ARP Camshaft Bolts.

Then you add an LS3 Cam (~$400) and springs/etc (~$600+).

On the other hand, to your original question:

Look at my Build Journal (sig) for the bolt-on approach to knock a full 1.2 seconds off your 1/4 mile times and add approximately 50RWHP. Bolt-ons, torque converter, and good rims will get you there.

After you've done the bolt-ons, then you can add a VVT cam (delete AFM/DOD, but keep the L99 "identity" with the VVT).

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Old 09-14-2011, 08:27 AM   #6
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Quote:
Originally Posted by Judge View Post
More on the L99 to LS3 conversion please (details)

Also, don't you think wen you convert your engine to an LS3, you kinda lost its true identity as an L99 automatic? Thats my opinion though




heres the thing though, most shops and people would rather work with a more older v8 style. not saying you cant use the VVt in the l99. but i feel better doing what my shop feels better with.

you can find a lot of info if you google.
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Old 09-14-2011, 08:34 AM   #7
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heres the thing though, most shops and people would rather work with a more older v8 style. not saying you cant use the VVt in the l99. but i feel better doing what my shop feels better with.
That's the nice thing about the TSP cam. They send you the VVT phaser tables. The rest is gravy. My shop will be doing their first VVT cam.

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Old 09-14-2011, 08:43 AM   #8
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typically, with your quest, we would recommend our 2c cam, which deletes the vvt and dod system, as well as a roto-fab cai, and kooks long tube headers. Typical power for this is 430-440 rwhp, with no loss in low end torque. It even works well with the stock converter!

We actually are running a special on it this month too, I am not certain where you are located, but we have had numerous people state that even with paying for transportation (which we offer) it's still cheaper than many prices they have found locally to them.
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Old 09-14-2011, 08:44 AM   #9
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Quote:
Originally Posted by Judge View Post
Which way do you prefer to add power to your L99 engine?

Forget about forced inductions, I want to know about your mods like Camshafts, Piston Heads, and so on.

Been researching camshafts for the L99 and found out they're pretty tricky due to the Active Fuel Management and other electronics in the engine.

So It'd be interesting to know your methods of adding more horses.




Just contact Mike at New Era Performance. The N.E.P. L99 project car is a fully streetable, mid-eleven second package.

There are those who talk about and then there's New Era Performance who actually do it!

NEW ERA PERFORMANCE PARTS


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Old 09-14-2011, 09:08 AM   #10
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We have run 11.20s with our heads/cam L99 camaro. Our pacakge uses the VVT-3 camshaft which has been proven to add 100 flywheel horsepower from the camshaft alone! Combine that camshaft with either the PRC CNC Ported LS3/L99 heads or the all new PRC Aftermarket casting LS3/L99 heads and you have huge power potential. Either combo will make big power, the aftermarket casting heads typically make some additional power over the stock ported heads thanks to smaller runners, smaller chambers, and improved air flow!

http://www.texas-speed.com/c-234-cam...c-engines.aspx

http://www.texas-speed.com/p-1388-pr...e-program.aspx

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Old 09-14-2011, 09:20 AM   #11
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If it was my L99 I would change to lower rear gears first, like 3:70's. Although you do not add HP you add performance improvement. Then, like Andy at Livernois says above, go to the motor and do LS3 conversion. Your redline will go from 6,200 to 6,800 by eliminating VVT cam and VVT lifters and cam phaser plus you have many more cams to choose from to meet your needs and expectations.
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Old 09-14-2011, 11:39 AM   #12
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Absolutely not true at all. The VVT is not limiting the redline to 6200. I have run VVT past 7800rpm without any issues.

Swapping in a LS3 conversion is what you do when your not comfortable with VVT technology. That's exactly the reason we offer VVT tune tables with our camshaft. That way you make 100% your VVT setup is phased correctly.

Checkout the fastest N/A list. I think you'll find our L99 stock motor car outrunning just about every na car including the strokers.

What you have to ask your self is do I want the best possible power at every rpm point or just at the hp peak? If you don't care about bottom and mid range power maximization then buy a standard camshaft. If you'd like better power output throughout the rpm range then VVT will allow you to do that.
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Old 09-14-2011, 12:51 PM   #13
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how about a 125 shot.....
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Old 09-14-2011, 01:20 PM   #14
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Quote:
Originally Posted by Jason 98 TA View Post
Absolutely not true at all. The VVT is not limiting the redline to 6200. I have run VVT past 7800rpm without any issues.

Swapping in a LS3 conversion is what you do when your not comfortable with VVT technology. That's exactly the reason we offer VVT tune tables with our camshaft. That way you make 100% your VVT setup is phased correctly.

Checkout the fastest N/A list. I think you'll find our L99 stock motor car outrunning just about every na car including the strokers.

What you have to ask your self is do I want the best possible power at every rpm point or just at the hp peak? If you don't care about bottom and mid range power maximization then buy a standard camshaft. If you'd like better power output throughout the rpm range then VVT will allow you to do that.
#Winning. Contact me, please.
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