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Horsetan View Drop Down
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Points: 6381 		Direct Link To This Post Posted: 20-April-2004 at 18:36
Originally posted by Peter H Peter H wrote:

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MickHarris View Drop Down
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Points: 15 		Direct Link To This Post Posted: 21-April-2004 at 10:09
Originally posted by Sohlman Sohlman wrote:

Certainly my friends M635 has just been rolling roaded and it gave only 226bhp at the wheels approx 240 at the fly wheel,

 

theres no way on earth that a car showing 226bhp at the wheels is only giving 240 at the flywheel, thats a loss of just 6%.

 

15% is more likely, and with the wheesl figure at 226bhp it wud give roughly 265bhp at the fly. still not as good as it shud be, but not bad considering the age and mileage of most M635's

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Points: 6381 		Direct Link To This Post Posted: 21-April-2004 at 11:09
Originally posted by MickHarris MickHarris wrote:

Originally posted by Sohlman Sohlman wrote:


Certainly my friends M635 has just been rolling roaded and it gave only 226bhp at the wheels approx 240 at the fly wheel,


 


theres no way on earth that a car showing 226bhp at the wheels is only giving 240 at the flywheel, thats a loss of just 6%.


 


15% is more likely, and with the wheesl figure at 226bhp it wud give roughly 265bhp at the fly. still not as good as it shud be, but not bad considering the age and mileage of most M635's



Don't worry too much about the statistics. When you've been on here long enough, you will notice that there are times when "Sohlman's" enthusiasm gets the better of him...!

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Points: 1259 		Direct Link To This Post Posted: 21-April-2004 at 21:53
Well i don't know much about rolling roads as you can tell, but i will possible know more as there is one comming up organised by Nigel that i may take the old girl to and after that day i should know more.
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Points: 15 		Direct Link To This Post Posted: 22-April-2004 at 00:40

15 - 17% is the general loss from a rwd.

 

most decent rr's will give u a figure for wheels and an extrapolated one for the flywheel (worked out thru coastdown transmission losses altho this isnt always totally accurate)

just make sure u use a decent rr really

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Points: 10 		Direct Link To This Post Posted: 02-May-2004 at 21:52

Good evening gang

May i will be able to shed some light on this subject . I have a very late M6 and its going to Black and White Racing in Aylesbury later this week to go on their rolling road to get the BHP checked .

Will keep you informed.

Ross 
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Points: 707 		Direct Link To This Post Posted: 02-May-2004 at 22:06
Until last year my Dad (Ex BMW GB) owned AmD and in his time dynoed a few M635CSi's. Late ones are generally down on power. A well known car belonging to Ron Creed ( a lovely grey F plater seen on many track days) was down to 240 bhp but a remap of the ECU brought it back up to over 280 bhp - the difference was amazing so it's just the ECU.
Although semi retired he could borrow a dyno and remap an M6 properly - beware these nasty plug in chips because they don't work properly. Don't forget that an old car like this will need something custom made to get the best from it.
If anyone wants it done, send me a mail and I'll see what I can do. He's in the Oxford area by the way.

Edited by Andyboy
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Points: 6381 		Direct Link To This Post Posted: 03-May-2004 at 13:51
Originally posted by Andyboy Andyboy wrote:

Until last year my Dad (Ex BMW GB) owned AmD ...the difference was amazing so it's just the ECU....If anyone wants it done, send me a mail and I'll see what I can do. He's in the Oxford area by the way.


Academic question only at the moment, Andyboy, but what is the position regarding "standard" 635CSis, particularly those from 1983 (this is of interest not only to me, but to one or two others with 1983 cars)?

Is it possible to "re-map" the ECUs in these, or are they permanently fixed?

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Points: 601 		Direct Link To This Post Posted: 14-May-2004 at 18:35
One point worth mentioning here is that the Highline M6's weighed a ton compared with the early ones.

And wot's the point of having a leather dashboard - almost turned a lovely car into a hairdresser's carriage.

Aplogies to Highline owners out there....
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Points: 744 		Direct Link To This Post Posted: 14-May-2004 at 21:54

-likewise I'd like to know what can be done with the ECU of a 635CSi 82-86 vintage.....

-I'm sure anything is possible in principle, but there is no substitute for someone having done it before, and able to say 'yup, I can do it again...'

cheers

 

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Points: 6381 		Direct Link To This Post Posted: 14-May-2004 at 23:29
Originally posted by Brucey Brucey wrote:

-likewise I'd like to know what can be done with the ECU of a 635CSi 82-86 vintage.....




It just so happens that an acquaintance of mine in the Bromsgrove area might be able to shed some light on that in the near future...

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Points: 1365 		Direct Link To This Post Posted: 16-May-2004 at 20:07

Originally posted by Jonners Jonners wrote:

And wot's the point of having a leather dashboard - almost turned a lovely car into a hairdresser's carriage.
....

Rather like my leather dash actually - if it's good enough for Alpina, Aston Martin, Ferrari etc.

 
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Points: 6484 		Direct Link To This Post Posted: 17-May-2004 at 09:57
I have to admit I quite like the idea of a leather dash too. Has to be a lot better than plastic.
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Points: 601 		Direct Link To This Post Posted: 20-May-2004 at 14:34
Astons and Ferraris ARE hairdressers' cars

It's unfortunate that this style crime was perpetrated on Alpinas too

Only kidding...

The thing is that the leather might be nice to have but the performance of the later cars suffered.

That wouldn't put hardressers off tho...but then again few people are going to chose any BMW for the interiors.

?performance -v- pose value?

Very subjective/emotive issue
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Peter H View Drop Down
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Points: 927 		Direct Link To This Post Posted: 23-May-2004 at 09:09

Originally posted by Horsetan Horsetan wrote:



It just so happens that an acquaintance of mine in the Bromsgrove area might be able to shed some light on that in the near future...

 

You know someone up here ???
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Points: 6381 		Direct Link To This Post Posted: 23-May-2004 at 16:13
Originally posted by Peter H Peter H wrote:

You know someone up here ???



Yes, but only one....

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RossM6/635 View Drop Down
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Points: 63 		Direct Link To This Post Posted: 27-May-2004 at 12:16

Hi fellow M6 lovers

I will to try and help with this power question on the M6 . I have had Geoff Everett ( ex AMD ) and Andyboys dad, play with my 1989 M6 . He meet me at Black and White Racing where we put the car on their rolling road . Well the power was well down , so he set to work on remapping the chip and also resetting the thottle , as it only opened 75 % . The car now shows 225 BHP at the wheels, and 299.9 BHP at the flywheel.   Obviously the flywheel reading is the machines best estimate by mesuring the drag of the drive train etc .   Can i suggest if you have any problems or want to get your cars checked then speak to Andrews dad  .

Geoff and Black and White racing were very good .

Await your replies

Ross

 

 
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Points: 6484 		Direct Link To This Post Posted: 27-May-2004 at 16:07

Jonners

Er... not sure why you think Ferraris and Astons are hairdressers cars. They could be decribed as many things but not that. I believe the aston DB7 was designed with golf playing executives in mind.

Also it's not a bit of leather on the dashboard that makes perfomance suffer. All TVRs have leather dashboards and they all weigh less than £1100Kg. You might question the reliabillirty of TVRs but their performance is almost unparralled for the price. What makes cars slow is the huge ammount of gadgets such as heated, electric memory sun visors, 75 airbags, Stabillity control and the 50 other devices that make up for the drivers lack of skill. 

Expensive, fast cars are as much about how they make you feel as how fast they go and a bit of leather on the dash just makes the car feel that bit more special than having to look at a big chuck of plastic. Get rid of the electric heated seats and keep the leather dash! 
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Points: 6381 		Direct Link To This Post Posted: 27-May-2004 at 18:21
Originally posted by RossM6/635 RossM6/635 wrote:

Hi fellow M6 lovers


I will to try and help with this power question on the M6 . I have had Geoff Everett ( ex AMD ) and Andyboys dad, play with my 1989 M6 . He meet me at Black and White Racing where we put the car on their rolling road . Well the power was well down , so he set to work on remapping the chip and also resetting the thottle , as it only opened 75 % . The car now shows 225 BHP at the wheels, and 299.9 BHP at the flywheel.   Obviously the flywheel reading is the machines best estimate by mesuring the drag of the drive train etc .   Can i suggest if you have any problems or want to get your cars checked then speak to Andrews dad  .


Geoff and Black and White racing were very good .


Await your replies


Ross



Ross:

I am told Andyboy is currently suspended from the Forum for a month, but may return.

Any direct contact details for Geoff Everett?

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Points: 6484 		Direct Link To This Post Posted: 28-May-2004 at 09:49

[/QUOTE]

Ross:

I am told Andyboy is currently suspended from the Forum for a month, but may return.

Any direct contact details for Geoff Everett?[/QUOTE]

Why what did he do?? or is that information top secret!!

BTW how do you do that thing where you quote someone else and it comes up in a white box with 'joe bloggs wrote' in black above.



Edited by Peter Fenwick
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