What is the redline on 03' E55?
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Joined: Apr 2003
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From: South Germany
Porsche 997 Turbo
Good question. 
My tranny upshifts at around 6600 rpm when I fully accelerate.
I heard something around 6800 but I don't remember anymore.
At 250 kph (157 mph) top speed (AMG 300 kph speed raise will be done soon), my engine is at 4600 rpm. Pretty impressive.
My tranny upshifts at around 6600 rpm when I fully accelerate.
I heard something around 6800 but I don't remember anymore.
At 250 kph (157 mph) top speed (AMG 300 kph speed raise will be done soon), my engine is at 4600 rpm. Pretty impressive.
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From: Melbourne, Australia
E55, F550, S600 Ducati 999
The tachometer is a damped analogue representation of the electrical imulses that it is receiving. As the engine revs, the momentum of the needle will cause it to over-read at the point of changing gears. This is most noticeable in the lower gears under rapid acceleration. Also tacho's can be inacurately calibrated.
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Joined: Apr 2003
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From: South Germany
Porsche 997 Turbo
Originally posted by stephens
The tachometer is a damped analogue representation of the electrical imulses that it is receiving. As the engine revs, the momentum of the needle will cause it to over-read at the point of changing gears. This is most noticeable in the lower gears under rapid acceleration. Also tacho's can be inacurately calibrated.
The tachometer is a damped analogue representation of the electrical imulses that it is receiving. As the engine revs, the momentum of the needle will cause it to over-read at the point of changing gears. This is most noticeable in the lower gears under rapid acceleration. Also tacho's can be inacurately calibrated.
Then he told me that it is impossible that my car upshifts at 6600 rpm because he had a E55 recently which did it at around 6300 and he also told me that from his personal experience, the tacho is pretty precise on the E-class.
So we went for a ride and he was surprised. When we came back to the dealership, another E55 was there, a customer who wanted to do an early oil change at around 6000 km.
We went with him for a short ride and, surprise, surprise, his car did the upshifts a 6300, maybe maximum 6400.
So now there are two possible explenations for this:
1. the tacho isn't accurate on my car (we checked the speeds too afterwards, same speed at same rpm)
2. I use 100 octane (translates into 97 octane US) fuel since I have the car and it is possible (my mechanic spoke to somebody at DC in Stuttgart in front of me) that engine ECU now allows higher rev because of the better quality.
To be sure, I'll check with AMG end of this month because I'm curious. If the fuel quality really has such an impact on the E55, it might provide more power too.
German E55 are adapted to 95 octane (92 octane US).
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From: .
08 GL450
RC, wouldn't it have been easier for the tech to just hook up the analyzer and see what the max rpm history your motor and the other E55 had run as measured at the crank sensor as you purposely ran it up into the rev limiter ?
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Joined: Apr 2003
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From: South Germany
Porsche 997 Turbo
Originally posted by MKW
RC, wouldn't it have been easier for the tech to just hook up the analyzer and see what the max rpm history your motor and the other E55 had run as measured at the crank sensor as you purposely ran it up into the rev limiter ?
RC, wouldn't it have been easier for the tech to just hook up the analyzer and see what the max rpm history your motor and the other E55 had run as measured at the crank sensor as you purposely ran it up into the rev limiter ?
I'll propose it next wednesday when I'm back at the dealer to fix the SRS warning error (seems that the co-driver's seat sensor mat is defective ).However I'm not sure that another E55 will be there for comparison. But anyway, the tester data is pretty precise, you're right.
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