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Old 08-24-2012, 01:57 PM   #1
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Cam Swap w/o Stall Converter

Hi, I was wondering from any of you gurus about there about swapping out the cam on my 2011 SS A6. I was looking at the Jannetty Racing 480 cam package with obviously the L99 to LS3 conversion kit and was wondering if I can get away with doing this without having to get a stall converter. I know that it is a big cam, but was wondering what the driveability issues would be if any. This car is not going to be a track car so I don't want to have to get my RPM'S up to some high number in order to get the car going a decent speed. If that one is just entirely too big to be street-able then I would appreciate suggestions on one that is. I am looking for that huge loop and nice power gains through the low-mid to upper end of the powerband. I already have a CAI brand cai, JRE Scoop w/ Washer Bottle Re-locator, long tubes, resonator delete, Flowmaster mufflers, and JRE complete SCT Tune. All advice would be appreciated. Thanks.
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Old 08-24-2012, 02:26 PM   #2
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Hard to do the lope on an auto without raising the stall. A lot of cams won't idle right on an auto. You'd have to stand on the brakes as it'll want to pull through.

I ran a Comp 54-424-11 w/ springs & pushrods on an LS1 stock 1850 stall in a 2002 WS6 with no issues other than cold idle stall going into gear once in a while if I forgot to let it run 30 sec or so. Mild cam for more top end, gained 30 hp on a Mustang dyno and kept all the torque in the midrange but with a 6600 rpm shift point.

Operating Range: 1400-6700 RPM
Duration Advertised: 265° Intake / 271° Exhaust
Duration @ .050'': 212° Intake / 218° Exhaust
Valve Lift w/1.7 Rockers: .558'' Intake / .563'' Exhaust
Lobe Separation Angle: 115°


Comp has a cam app you can load that'll rec a cam based on usage, stall ect. I'm afraid anything lopier will cause you issues.

Hopefully someone with LS3 auto experience will chime in. I tried to find the cam specs on JRE but didn't have much luck.
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Old 08-24-2012, 02:50 PM   #3
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i have a livernois 2c cam stock converter,,,,has some lope to it...its about as big as you can go though with the stock converter
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Old 08-24-2012, 03:08 PM   #4
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You need to talk to the shop(s) that you are looking at cams from.

All depends on the cam, but the converter is going to for sure put a narrowed search down on what cam you are going to put in the car and have something that is fun to drive.

Say you wanted to put a big cam in the car like our G6X3. The cam is going to want to idle 950-1050 RPM, put your car at that same RPM right now and see what does it take to hold the car at that RPM and not move. Turning the RPM down slightly on cams of this size can sometimes be done but you may start to run into stalling issues.

Now of course that is just stopping and idle conditions, it speaks nothing of how they drive under throttle. Remember also on the bigger cams that you will increase the RPM of the power range so you would want a torque converter that has a higher stall range, smaller diameter and also higher torque mult. factor.

So there are a lot of gains to be had with a converter, even if you didn't do a cam in the car at all.
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Old 08-24-2012, 03:25 PM   #5
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I have the gt-11 lpe cam with stock stall, I idle around 700
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Old 08-24-2012, 03:28 PM   #6
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Originally Posted by sasquash1984 View Post
I have the gt-11 lpe cam with stock stall, I idle around 700
This is also the cam(Lingenfelter GT-11) Im going with while keeping the stock converter.

Lingenfelter GT11 Hyd Roller Camshaft 350-383-427 LS1 LS2 LS3 LS6

215/231 .631/.644 118.0 CL


Hey Sasquash,

How much rwhp did you get with the gt-11?
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Old 08-24-2012, 03:43 PM   #7
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You don't need a converter. You're going to have to press the brakes hard bc the car is going to want to move, but you don't need one.
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Old 08-24-2012, 04:00 PM   #8
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I personally would go stall before cam.
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Old 08-24-2012, 05:04 PM   #9
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Quote:
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I personally would go stall before cam.
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Old 08-24-2012, 06:04 PM   #10
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Agree w/Bo & Anthony.....


I triple that. .5-.7 sec improvement in ET (at least on a good prepped track) with NOTHING else.
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Old 08-24-2012, 06:19 PM   #11
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Exactly, times at the track will drop alot more with a stall than a stock converter friendly cam. I went through this with my Z28.
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Old 08-24-2012, 10:15 PM   #12
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Quote:
Originally Posted by JEFF75645 View Post
This is also the cam(Lingenfelter GT-11) Im going with while keeping the stock converter.

Lingenfelter GT11 Hyd Roller Camshaft 350-383-427 LS1 LS2 LS3 LS6

215/231 .631/.644 118.0 CL


Hey Sasquash,

How much rwhp did you get with the gt-11?
500 motor 440 rwhp (of course thats ls3 conversion and full bolts on)
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Old 08-24-2012, 10:20 PM   #13
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500 motor 440 rwhp (of course thats ls3 conversion and full bolts on)
Cool. Thanks. I also had the heads done to 10.9:1. That ought to add a few horses. Sorry bout the thread jack.
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Old 08-24-2012, 11:09 PM   #14
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I am real confused now. I have some people telling me to do the stall first and foremost. But then again there are stock converter friendly cams. So which is the better option? And what real benefit would I get with driving my car around with an aftermarket stall. I mean if the stock cam is in won't it just lag at the launch till you get to the flash point?

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