M275 V12 Bi-Turbo Platform Technical discussion relating to models sharing the M275 V12 Bi-Turbo (V12 TT). Including SL600, SL65 AMG, CL600, CL65 AMG, S600, S65 AMG.
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Tq Curve Question

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Old Jan 26, 2013 | 03:02 AM
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'18 Eurocharged GLE 43
Question Tq Curve Question

2005 CL65
stock

my tq converter is shot so I'm having southern hotrod send it off to protorque for a rebuild. I'm going to put a stall on it, too. since the converter is shot I won't get a good dyno pull so i can't go that route. what is the peak tq curve? what is the tq at 2800? recommendations?
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Old Jan 26, 2013 | 07:59 PM
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'06 S65 AMG W220 12.31@119_MPH (Stock)
When you say your tq converter is shot. Can you describe what is going on with it?

As far as the tq curve, I woud say it peaks at 738 ft-lbs at 3000 RPM which is why you probably don't want to increase the stall speed of your converter.

Normally, when you have your car dyno. You want the tq converter to be locked 1:1 in order to get the best results.
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Old Jan 27, 2013 | 01:29 PM
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'18 Eurocharged GLE 43
Originally Posted by DarthVader2
When you say your tq converter is shot. Can you describe what is going on with it?

As far as the tq curve, I woud say it peaks at 738 ft-lbs at 3000 RPM which is why you probably don't want to increase the stall speed of your converter.

Normally, when you have your car dyno. You want the tq converter to be locked 1:1 in order to get the best results.
high whining, slipping gears and went into limp home mode and wouldn't go out of 1st. typical converter issues.

just saw a dyno chart that showed at 3k its only about 60%. 3200 is what I'm going with. when you dyno you're typically in 3rd. a stall doesn't change anything.
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Old Jan 27, 2013 | 05:48 PM
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'06 S65 AMG W220 12.31@119_MPH (Stock)
I don't know, but slipping gears and stuck in 1st sounds like trans problems to me. Pretty sure the trans shop will tell you that your trans needs to be rebuilt or replaced. I don't think replacing just the tq converter will solve your problems.

According to the manufacturer spec, they claimed that the tq peaks at 3000 rpm. May be they fudge the numbers? Care to share with us your dyno chart that only shows 60% at 3000 rpm? So at what rpm it's showing max tq?

When I said 1:1 during dyno, I was refering to the tq converter being locked not allowing it to slip. I did NOT mentioned anything about the trans gearing.

Let us know how you make out with the 3200 stall speed. Are you planning to spend a lot of times at the drags strip?
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Old Jan 27, 2013 | 09:20 PM
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'18 Eurocharged GLE 43
mbworld.org/forums/cl55-amg-cl65-amg-cl63-amg-w215-w216/174524-bone-stock-cl65-dyno-results.html

m275 dyno. its staying in 1st because its in limp mode, not because it can't go in gear. after restart it changes gear again. I've worked on at's enough to tell what it is. the issue is if any damage was done to the tranny, but won't know until its dropped. as for the dyno, 3 kish is where the run starts so having a stall there is no issue. the wheels still below that. I track it and street it on occasion.
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Old Jan 29, 2013 | 10:13 AM
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'18 Eurocharged GLE 43
Originally Posted by DarthVader2
I don't know, but slipping gears and stuck in 1st sounds like trans problems to me. Pretty sure the trans shop will tell you that your trans needs to be rebuilt or replaced.
Turns out we're both right...ugh lol Having southern hotrod build me a new tranny and then protorque do the converter. Yeah. love spending money...
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Old Feb 19, 2013 | 05:52 AM
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From: Welwyn, Herts, UK
2006 S600
Originally Posted by nola_penguin
mbworld.org/forums/cl55-amg-cl65-amg-cl63-amg-w215-w216/174524-bone-stock-cl65-dyno-results.html
Great numbers on that chart, but I don't think it tells the whole story.

That just looks like a run between 3300 and 5300 rpm.

Nick
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Old Sep 26, 2013 | 09:45 AM
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2006 CL65
Yeah I was going to say. If your converter is done, your trans will also be. Seen that enough.
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