CLK55 dyno run

[i_york]

Just a heads-up to anyone who's interested, I've got my CLK55 booked-in for a power run at Northampton Motorsport on Saturday. I'm not gonna be able to get any meaningful numbers from lower revs due to the challenges inherent in chassis dyno'ing an auto. However, I'm hopeful that I can at least get a meaningful peak figure. The only reason I'm getting this done is because I'm curious to see how the output of the CLK55 compares to the C5 Corvette I used to own (which was also dyno'd at the same place on the same set of rollers). I'm expecting the numbers to be a bit low because I suspect their rollers are a bit stingy (measured 268RWHP on the C5). However, the CLK55 has turned-in a 4.65 0-60 on the G-Tech Pro, so I know it's healthy

Will update this thread over the weekend.

Cheers,
Ian.

 

[andy_cyp]

0.60 in 4.65 ????? i wouldnt sleep on those figures my friend.

 

[KLP 92]

0.60 in 4.65 ????? i wouldnt sleep on those figures my friend.

I know a E55 W210 managed a 4.7s 0-60mph time on a dyno, published in a USA magazine.

 

[ADY1983]

I would like to get mine done when its finished.. I have a G-TECH too, not had chance to use it yet tho...

 

[Bazzle]

http://www.mbworld.org/forums/showthread.php?t=146992

Bazzle

 

[i_york]

0.60 in 4.65 ????? i wouldnt sleep on those figures my friend.

Not sure what you mean, but I'm assuming you're doubting that number, so I'll provide a little more detail.

I have a G-Tech Pro SS, which was self-levelled before each run. My average, easily repeatable, times are around 4.8-5.2. The 4.65 is the best I've managed so far and I doubt that I'll better. There are so many factors that affect 0-60's and, once you get down to the mid-4's range, traction is the biggest factor of all (which, itself, is subject to many variables). The road surface, tyres, ambient temperature all affect traction off the line, as does, of couse, launch technique. My launch technique is a little more involved that simply stomping on the throttle (which will generally result in low 5's with ESP on). I brake-stall to about 1,500rpm then roll into the throttle to try and minimise wheel spin off the line (ESP off). Basically, I'm confident that the numbers it's giving me are accurate.

By the way, I tried flooring it off the line with ESP off for a laugh... resulted in viscious wheel spin all the way through 1st gear and a pair of black lines on the road!

Cheers,
Ian.

 

[i_york]

I know a E55 W210 managed a 4.7s 0-60mph time on a dyno, published in a USA magazine.

Hmm, not too sure about measuring 0-60's on a dyno... rolling resistance would be far less (nice smooth, shiny rollers and if there's two of them, you have double the contact patch). Also, no aerodynamic losses to take into account with the car being stationary. 4.7 sounds about right though!

Cheers,
Ian.

 

[Bobby Dazzler]

Would you mind me asking how much you paid for the G-tech and where you bought it from?

 

[Bazzle]

Would you mind me asking how much you paid for the G-tech and where you bought it from?

http://www.gtechpro.com/

Bazzle

 

[i_york]

Would you mind me asking how much you paid for the G-tech and where you bought it from?

I paid $181 (~£91) delivered off eBay.com. My girlfriend is in NYC (where I also lived for nearly 2 years up until recently), so I had it shipped there and brought it back with me when I last visited her.

Cheers,
Ian.

 

[Bobby Dazzler]

I paid $181 (~£91) delivered off eBay.com. My girlfriend is in NYC (where I also lived for nearly 2 years up until recently), so I had it shipped there and brought it back with me when I last visited her.

I looked into these back in the summer when a member was selling the previous model. I'd noticed that like most things they were the same price in dollars from US as they are in pounds in UK!!

I just wondered whether you'd bought it here at a price more reasonable then £199 - £91 is much more reasonable!!

 

[Alfie]

Hmm, not too sure about measuring 0-60's on a dyno... rolling resistance would be far less (nice smooth, shiny rollers and if there's two of them, you have double the contact patch). Also, no aerodynamic losses to take into account with the car being stationary. 4.7 sounds about right though!

Cheers,
Ian.

One of the biggest factors in 0-60 is overcoming the initial inertia of the vehicle. Taking the car from a complete standstill to any speed requires a lot of energy just to get it moving. This is an almost zero effect on a rolling road as all you need to do is make the wheels turn whereas on a road surface you have to launch the whole weight of the car off the line. I would expect a rolling road to always produce much better 0-60 times than on a road surface. Similarly braking performance will also be way better than in practice as the brakes dont have the whole weight of the vehicle to stop, just the spinning wheels!

There was a thread a while back where someone had a DMS remapped diesel which seemed to go from 0-40 very quickly. The movie was absolutely dead still which to me means it was probably performed on a rolling road and therefore not a true measure of the actual performance of the vehicle.

 

[i_york]

I looked into these back in the summer when a member was selling the previous model. I'd noticed that like most things they were the same price in dollars from US as they are in pounds in UK!!

I just wondered whether you'd bought it here at a price more reasonable then £199 - £91 is much more reasonable!!

Actually, I have the previous model and no longer have any use for it. If you (or anyone else is interested), I'd sell it for £45 + postage. It's as new with the original box and instructions.

Cheers
Ian.

 

[190cossie]

Would be good to see the results once you've had it dynoed

 

[Glenn Smith]

One of the biggest factors in 0-60 is overcoming the initial inertia of the vehicle. Taking the car from a complete standstill to any speed requires a lot of energy just to get it moving. This is an almost zero effect on a rolling road as all you need to do is make the wheels turn whereas on a road surface you have to launch the whole weight of the car off the line. I would expect a rolling road to always produce much better 0-60 times than on a road surface. Similarly braking performance will also be way better than in practice as the brakes dont have the whole weight of the vehicle to stop, just the spinning wheels!

There was a thread a while back where someone had a DMS remapped diesel which seemed to go from 0-40 very quickly. The movie was absolutely dead still which to me means it was probably performed on a rolling road and therefore not a true measure of the actual performance of the vehicle.

The dyno will have been programed to imitate a true 0-60 run, the weight of the car etc. will be inputted to the dyno's comptuter and the rollers braked accordingly to simulate a true run. anyway who cares about 0-60 times, surely 50-70 and 70-90 are more important and in which gear, these readings show the true flexibility of the car on the road, think about how often you accelerate as quickly as possible off the line to 60mph compared to how often you floor it between the range of 50-90mph.

 

[Birdman]

Will update this thread over the weekend.
Cheers,
Ian.

How did it go???

(edit) Btw you have a PM

 

[kth286]

obviously not good ?

This is the guy that went into the factor to get air filters because they were half price compared to the stealer.

After much 'tooing and froing' he got the correct pattern (bear in mind NOT the right product for his car though, because he is too stingy to pay for the proper filters).

He has a performance car and will not pay for the correct AMG filters - what's that about.

In his post he stated 'a filter is only a piece of paper afterall' probably not realising the special high flow nature of the AMG filters.

So, I guess his car may have been down on power !!!!!!!!!!!?????????????

We wait and see.

 

[Sp!ke]

I'd love to borrow one of these Gtechs to try on my Hayabusa before I sell it.

Anyone with one live in West london?

 

[i_york]

obviously not good ?

This is the guy that went into the factor to get air filters because they were half price compared to the stealer.

After much 'tooing and froing' he got the correct pattern (bear in mind NOT the right product for his car though, because he is too stingy to pay for the proper filters).

He has a performance car and will not pay for the correct AMG filters - what's that about.

In his post he stated 'a filter is only a piece of paper afterall' probably not realising the special high flow nature of the AMG filters.

So, I guess his car may have been down on power !!!!!!!!!!!?????????????

We wait and see.

This is exactly the kind of juvenile, arrogant and overly-opinionated behaviour I see all too often on forums and why I generally avoid them.

I'm really rather confused as to why you are so bent out of shape over my choice of air filter, but it's rather sad.

As I have already stated (and I really hate feeling that I have to justify myself to some geezer I don't even know)... the filters I bought were manufactured by MANN. These are OEM's for MB and are EXACTLY THE SAME FILTERS as the genuine items; just a different badge. Just because something has an AMG badge on it doesn't mean to say it cannot be manufactured by a third-party at an equivalent quality for less. Only short-sighted people like yourself will blindly throw their money at the stealer and believe doing anything different is for ignoramaces and peasants. However, if you choose to do so, I would not ordinarily publicly chastise you... you're entitled to do whatever you like; it's your money and your car. In this case, you're brought this response on yourself, unfortunately. You should try showing a little more respect for other people, my friend.

Yes, I drive an AMG. Am I loaded? No. Do I enjoy keeping main dealers in the luxury to which they're accustomed? No. Am I confident in my own knowledge and ability to feel that my purchasing decisions are informed? Yes.

I won't be posting here again because I'm fed-up of idiots like you that spoil it for everyone else.

Apologies to everyone else for the tone of this post, but I just needed to get this off my chest before leaving.

Ian.

 

[i_york]

obviously not good ?

This is the guy that went into the factor to get air filters because they were half price compared to the stealer.

After much 'tooing and froing' he got the correct pattern (bear in mind NOT the right product for his car though, because he is too stingy to pay for the proper filters).

He has a performance car and will not pay for the correct AMG filters - what's that about.

In his post he stated 'a filter is only a piece of paper afterall' probably not realising the special high flow nature of the AMG filters.

So, I guess his car may have been down on power !!!!!!!!!!!?????????????

We wait and see.

This is exactly the kind of juvenile, arrogant and overly-opinionated behaviour I see all too often on forums and why I generally avoid them.

I'm really rather confused as to why you are so bent out of shape over my choice of air filter, but it's rather sad.

As I have already stated (and I really hate feeling that I have to justify myself to some geezer I don't even know)... the filters I bought were manufactured by MANN. These are OEM's for MB and are EXACTLY THE SAME FILTERS as the genuine items; just a different badge. Just because something has an AMG badge on it doesn't mean to say it cannot be manufactured by a third-party at an equivalent quality for less. Only short-sighted people like yourself will blindly throw their money at the stealer and believe doing anything different is for ignoramaces and peasants. However, if you choose to do so, I would not ordinarily publicly chastise you... you're entitled to do whatever you like; it's your money and your car. In this case, you're brought this response on yourself, unfortunately. You should try showing a little more respect for other people, my friend.

Yes, I drive an AMG. Am I loaded? No. Do I enjoy keeping main dealers in the luxury to which they're accustomed? No. Am I confident in my own knowledge and ability to feel that my purchasing decisions are informed? Yes.

I won't be posting here again because I'm fed-up of idiots like you that spoil it for everyone else.

Apologies to everyone else for the tone of this post, but I just needed to get this off my chest before leaving.

Ian.