what is the delay of touchshift at full throttle?
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From: Houston, TX
2002 C230 Coupe Black/Charcoal C5 C7 Auto
what is the delay of touchshift at full throttle?
I do have one question about the delay of the touchshift upshifts. I rem in my A4 tiptronic I can guess the delay of shift to about 300rpm (+ or - 50rpm), meaning that if i wanted to shift at 5300rpm i would do it at 5000rpm resulting in about 5300rpm shifts. After looking at the dyno charts of my pullied car ideally i would want to shift at about 5700rpm however if i leave in full automatic it shift at either 6000rpm or sometime even 6200rpm. Does anyone know whats the delay/discrepency of the touchshift tranny so that I can get more precise 5700rpm when u're pushing full-throttle? Thanks.
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From: Houston, TX
2002 C230 Coupe Black/Charcoal C5 C7 Auto
bump....okay one of the australian guys said that he shift at 5500rpm for a 6k shift when full throttle but thats a diff engine and possible diff tranny. any other touchshift owners who pay attention to the shift pattern of their c230k coupe? i've only had my '02 for about 7 months so not entirely sure yet.
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From: Ohio
2010 C300 4matic
Aren't you able to figure it out by testing it? I know the delay varies depending on how hard you are pushing. But enough testing at full throttle and you should be able to find the exact point, assuming it remain constant.
BTW, what led you to believe that 5700 rpm is the optimal shift point? I know the torque starts to drop off after 4800 rpm. Is there a much larger drop at 5700 or something?
BTW, what led you to believe that 5700 rpm is the optimal shift point? I know the torque starts to drop off after 4800 rpm. Is there a much larger drop at 5700 or something?
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From: Houston, TX
2002 C230 Coupe Black/Charcoal C5 C7 Auto
Matt,
I was hoping someone else woulda figured it out by now b/c most have their '02s longer than I have. Also, there's not much room here in town to do this kinda testing unfortunately.
I dont rem the dyno graphs but if I rem correctly the hp and torque are pretty constant up to about 5500-5600rpm then drop much sharply after that. I really gotta get a scanner to put these graphs up. Also I have a pullied car rem.
I was hoping someone else woulda figured it out by now b/c most have their '02s longer than I have. Also, there's not much room here in town to do this kinda testing unfortunately.
I dont rem the dyno graphs but if I rem correctly the hp and torque are pretty constant up to about 5500-5600rpm then drop much sharply after that. I really gotta get a scanner to put these graphs up. Also I have a pullied car rem.
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From: Ohio
2010 C300 4matic
Originally posted by tberry
I really gotta get a scanner to put these graphs up. Also I have a pullied car rem.
I really gotta get a scanner to put these graphs up. Also I have a pullied car rem.
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From: Houston, TX
2002 C230 Coupe Black/Charcoal C5 C7 Auto
Originally posted by Matt230K
Yeah, I have a pullied car too, and it's also great to know the optimal shift points with my 6-speed. But I'm not racing it, so I'm not too concerned.
Yeah, I have a pullied car too, and it's also great to know the optimal shift points with my 6-speed. But I'm not racing it, so I'm not too concerned.
"
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From: Ohio
2010 C300 4matic
Originally posted by tberry
I can see your sales ad aleady "mercedes benz 2.3L supercharged, 6 spd manual short shfter, kleemn alloy pulley boost kit......never been raced "
I can see your sales ad aleady "mercedes benz 2.3L supercharged, 6 spd manual short shfter, kleemn alloy pulley boost kit......never been raced
"
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From: Houston, TX
2002 C230 Coupe Black/Charcoal C5 C7 Auto
Originally posted by Matt230K
I don't think I would sell it then. Just mentioning the word race will make people think it has been raced. Best not to mention it at all. But I'm not that hard on it. It hasn't been raced, only street driven. And I'm sure it can handle my occasional hard driving. I don't abuse it.
I don't think I would sell it then. Just mentioning the word race will make people think it has been raced. Best not to mention it at all. But I'm not that hard on it. It hasn't been raced, only street driven. And I'm sure it can handle my occasional hard driving. I don't abuse it.
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From: Gaithersburg, MD
2002 C240 6-spd (ret)
Question for you guys. As I said earlier, I've got a 6-spd, but I did have a C240 auto loaner for a day. Are you all saying that there's a different delay factor if you upshift with touchshift rather than just leaving it in "D"? I mean, after some casual testing, I was under the impression that upshifting simply lets the transmission go into the next higher gear when it would normally decide to do so. So, I understand that while you're accelerating, and you bump it to the next gear, it may not upshift immediately because it wouldn't have been ready to anyway if it had been left in "D". Am I stating my question clearly? Therefore, I thought the delay in the upshift wasn't due to the touchshift itself, but due to the continued acceleration in the present gear.
Actually, I think the only valid way to check is to floor it in a gear when in "D" to see where the rpms are when it shifts on its own, then floor it, say in "2" and upshift to "3" during the acceleration and compare the rpms to the full auto mode. Otherwise, I don't think you can really duplicate the acceleration levels on successive runs.
Actually, I think the only valid way to check is to floor it in a gear when in "D" to see where the rpms are when it shifts on its own, then floor it, say in "2" and upshift to "3" during the acceleration and compare the rpms to the full auto mode. Otherwise, I don't think you can really duplicate the acceleration levels on successive runs.
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From: Houston, TX
2002 C230 Coupe Black/Charcoal C5 C7 Auto
Originally posted by MarkL
Actually, I think the only valid way to check is to floor it in a gear when in "D" to see where the rpms are when it shifts on its own, then floor it, say in "2" and upshift to "3" during the acceleration and compare the rpms to the full auto mode. Otherwise, I don't think you can really duplicate the acceleration levels on successive runs.
Actually, I think the only valid way to check is to floor it in a gear when in "D" to see where the rpms are when it shifts on its own, then floor it, say in "2" and upshift to "3" during the acceleration and compare the rpms to the full auto mode. Otherwise, I don't think you can really duplicate the acceleration levels on successive runs.
*So all i really want to know is when using the touchshift and flooring (full-throttle) and you "shift", how many RPM delay is there until the car actually shift to the next gear? I guess looks like I'll have to experiment on my own.
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MarkL, if you move the gear shift lever to the left and hold it there, the car will shift to the lowest permitted gear. After that, the transmission will only shift when you hit the red line. That is how the transmission in the automatic coupe I had for 77 days behaved.
Personally, I think Touchshift is absolutely useless. Trying to drive the car in a sporting manner is like trying to drive a turbo with 2 seconds of turbo lag, except Touchshift is less consistent in its delays.
Personally, I think Touchshift is absolutely useless. Trying to drive the car in a sporting manner is like trying to drive a turbo with 2 seconds of turbo lag, except Touchshift is less consistent in its delays.
