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Throttle surge at 3,000 RPM?

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Old 10-15-2007, 03:45 PM
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Jim 'n' SC
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Default Throttle surge at 3,000 RPM?
Sometimes I get a small surge at about 3,000 RPM. Is this normal? I have a 2007 3.6L C2. Had a 2003 Boxster with the 2.7L prior to the 997 and don't remember ever having this problem.
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Old 10-15-2007, 04:05 PM
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cello
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I get the same thing (07 Targa 4). Feels like a small push just as you reach/pass that rpm mark. Something to do with the VarioCam?
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Old 10-15-2007, 05:09 PM
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cvazquez
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This is the vario-cam at work... mostly notice if going slow, however, if you step on it the surge is barely noticeable. Therefore, the remedy is to unleash the beast!
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Old 10-15-2007, 05:12 PM
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Agreed, it is the VarioCam and should "kick in" at about 3,200 to 3,400 RPMs.
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Old 10-15-2007, 05:45 PM
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Tim,
You looking to get a 997 to replace that 996 ?
You are over here a lot now ;-0
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Old 10-15-2007, 06:04 PM
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Originally Posted by Jim 'n' SC
Sometimes I get a small surge at about 3,000 RPM. Is this normal? I have a 2007 3.6L C2. Had a 2003 Boxster with the 2.7L prior to the 997 and don't remember ever having this problem.
I do/did not have this with either of the 2 997 S's I've owned and I generally notice every little thing...the service dept just loves that about me lol...
 
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Old 10-15-2007, 06:07 PM
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gota911
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Originally Posted by Dr_KarlB
Tim,
You looking to get a 997 to replace that 996 ?
You are over here a lot now ;-0
No, not currently looking at a 997, but I wish that were the case.

I have been hanging out here for quite a while reading and learning a lot. Every now and then, on certain topics, I can offer some info that may help others.
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Old 10-16-2007, 02:02 PM
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I too get the surge at 3,100 RPM. Very noticeable, but I kinda like it. Thought it may be Vario-Cam, which is okay, but if it was a fuel mapping issue I would have complained.

BTW, Carrera GT sighting last Saturday on the way to a track day on the Duc. It was probably leaving Motorsport Ranch in Cresson, TX when I spotted the silver zephyr. Gorgeous!
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Old 10-16-2007, 02:42 PM
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1999Porsche911
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The surge is NOT always related to the variocam operation. At 3120 rpm and 30%+ throttle, your resonance valve is closed to shorten the length of the intake.
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Old 10-16-2007, 02:46 PM
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Interesting; Thanks for that info
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Old 10-16-2007, 03:17 PM
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Originally Posted by gota911
No, not currently looking at a 997, but I wish that were the case.

I have been hanging out here for quite a while reading and learning a lot. Every now and then, on certain topics, I can offer some info that may help others.

I for one think you add a lot of value on this Board
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Old 10-16-2007, 04:51 PM
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VTECH!!!
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Old 10-16-2007, 05:55 PM
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Originally Posted by adfsouth
I for one think you add a lot of value on this Board
Thank you! I appreciate the comment.
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Old 10-18-2007, 07:56 AM
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I have noticed it also, my service manager said it is the vario-cam.
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Old 10-18-2007, 12:40 PM
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Under what exact circumstances are you guy's noticing this, as when I drive through the 3000+/- rpm spot I feel nothing, no surge and all is very smooth???

2007 C2S 6 speed
 
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