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Old 07-28-2010, 05:09 PM   #1
MTI Racing Kevin
 
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L99 Cam Swap

MTI Racing just finished up another 2010 Camaro camshaft swap, lowering springs, and sway bar package. This L99 Camaro came in from Alabama wanting more power and better handling, no problem.

We started by installing our Stage 1 Camshaft with matching valve springs. The stage 1 Camshaft is designed to be used with the stock torque converter and the DOD system on the L99 Camaro. This camshaft makes awesome horsepower and torque by taking advantage of the great airflow the LS3 cylinder heads, plus the added benefit of headers the car already had installed. You will get a mild to moderate sound from this camshaft. This Camaro went from 312rwhp to 405rwhp.

We also installed a set of the MTI Racing Sport Lowering Springs to give the car a more aggressive look and improve the handling by lowering the center of gravity. Combined with the MTI Racing Sway Bars to limit body roll this Camaro is now ready to carve up those mountain roads with confidence.

List of Goodies
MTI Racing Stage 1 Camshaft
MTI Racing Sport Lowering Springs
MTI Racing Sway Bars
MTI Racing Dyno Tune & Computer Programming
MTI Racing Front Suspension Alignment



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Old 07-28-2010, 05:17 PM   #2
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Is a sound file available for this cam/header combo?
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Old 07-28-2010, 05:59 PM   #3
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wowzers
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Old 07-28-2010, 06:15 PM   #4
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Very impressive!
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Old 07-28-2010, 07:17 PM   #5
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Quote:
Originally Posted by DangerouSS View Post
Is a sound file available for this cam/header combo?
I'd like to hear this too. Good output though.
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Old 07-28-2010, 07:29 PM   #6
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Ditto
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Old 07-28-2010, 07:42 PM   #7
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does that cam fit with supercharger kit ?
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Old 07-28-2010, 11:40 PM   #8
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What are the specs on this stage 1 cam??
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Old 07-29-2010, 12:02 PM   #9
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If you click the link in the original post, it gives the specs on the cam.
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Old 08-03-2010, 12:09 AM   #10
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How much should one expect to pay for a cam install and tune? I have Kook's 1 7/8"'s and a Rotofab... looking for next fun mod!

Would this cam be a problem if/when I go to a supercharger?
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Old 08-03-2010, 12:16 AM   #11
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It dynoed at 312 rwhp WITH headers already???

WTF?, THAT dude was in serious need of a fuse pull.

Were the headers installed loosely in the trunk? I'm a little confused.
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Old 08-03-2010, 01:02 AM   #12
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Quote:
Originally Posted by PQ View Post
It dynoed at 312 rwhp WITH headers already???

WTF?, THAT dude was in serious need of a fuse pull.

Were the headers installed loosely in the trunk? I'm a little confused.
I was thinking the same way. I've yet to see a cam, especially a stage 1 cam, that makes 90whp. This cam is suppose to be DOD friendly? It just doesn't add up. Even the GX6 cam doesn't give that much of a gain and it's pretty radical.
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Old 08-03-2010, 01:15 AM   #13
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Is that an EOD license plate up front??

-Ivan
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Old 08-03-2010, 10:49 AM   #14
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Quote:
Originally Posted by PQ View Post
It dynoed at 312 rwhp WITH headers already???

WTF?, THAT dude was in serious need of a fuse pull.

Were the headers installed loosely in the trunk? I'm a little confused.
It was probably in need of a fuse pull, yes. But that was probably hurting it by about 10hp.

This is why we base line the car before we do the work, and then dyno it after we do the work.

The cam swap and dyno tuning were a great upgrade.
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Old 08-03-2010, 04:40 PM   #15
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Quote:
Originally Posted by PQ View Post
It dynoed at 312 rwhp WITH headers already???

WTF?, THAT dude was in serious need of a fuse pull.

Were the headers installed loosely in the trunk? I'm a little confused.
I just installed some headers and they made zero horsepower. But they did make 20 ft/lbs of torque at the wheels.

My knock retard will not let timing go above 14. At least that's what was happening when my car was on the rollers when my headers were installed.

But... My car is noticabley faster now. Forget butt dyno, my car will get squirly when it shifts into 3rd gear now. It never did that before.

It's really strange, the rwtq increase that I got from the headers was across most of the powerband, and for whatever reason, that little difference changed the way my car drives. It's just a lot more powerful now.

But, perhaps my car is making the timing that the tune is commanding, now that my car doesn't have the heat soak and high IAT's that it was seeing when it was being dynod. It was over 100* F that day and the IAT's were like 150+.

Another thing is these L99's dyno so differently from one to the next. My car dynod at 317 rwhp (336 with proper weather correction factor) when it just had a Corsa catback. Then I installed a Halltech Yellow Jacket (no tune version) and it made 297 rwhp on a different Mustang dyno.

I'm still baffled by that. And my car doesn't need a fuse pull because it was built in Jan of this year and has all the recent updates from the factory.

From what I understand, fuse pull only works for L99's that were built before a certain date in 2009.
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Old 08-03-2010, 04:47 PM   #16
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Quote:
Originally Posted by axis View Post
I was thinking the same way. I've yet to see a cam, especially a stage 1 cam, that makes 90whp. This cam is suppose to be DOD friendly? It just doesn't add up. Even the GX6 cam doesn't give that much of a gain and it's pretty radical.
You know what? I can see how the gain is possible, especially for an L99. My tuner tells me that the L99 camshaft is weak (does not make power). He says it's the real limiter for the L99.

Once you change the L99 VVT camshaft to a traditional one like the one in the LS3, you will have an engine that is making hp like the LS3. This camshaft probably makes more power than the LS3 cam.

If that's the case, once you add the power that comes from headers and a proper tune, these results seem very good but also pretty normal.

Of course, this assumes that the MTI Racing Stage 1 Cam is not a VVT cam. But then again, these new VVT cams that are coming out make some pretty good power.
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Old 08-03-2010, 06:31 PM   #17
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Quote:
Originally Posted by MTI Racing Kevin View Post
It was probably in need of a fuse pull, yes. But that was probably hurting it by about 10hp.

This is why we base line the car before we do the work, and then dyno it after we do the work.

The cam swap and dyno tuning were a great upgrade.
Wow. I would just have a problem putting headers on and gaining no HP. Even if the torque did had a moderate gain.

But I bet it sounds great now that you guys are done with it.



Quote:
Originally Posted by SonnyakaPig View Post
From what I understand, fuse pull only works for L99's that were built before a certain date in 2009.
I just confirmed that's not accurate. I know I've said taht for a while, but I was wrong. There is no fix for the cars computer to auto relearn the timing maps for fuel. The fuse pull, or dealer doing it manualy, is the only re-learn for the car should you get bad gas or low oct. in it.

Tuning it may reset the defaults however.
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