Hi, just a follow up to earlier query re remapping. Had the car done last week and boy was I shocked at

 

the stock dyno bhp reading.............it was    88bhp at the wheels.....sooo much loss in transmission

 

even for DSG & 4x4. So remap done and now 118bhp at wheels.......30bhp increase   . Torque at

 

stock was 234nm and 298nm after remap.

 

I haven't done any real mileage yet but the improvement is noticable, more pull low down, smoother,

 

much livelier between 40-70 so well pleased. Can post the remap sheet results if anyone interested.

powertrain loss in a DSG? a traditional auto id expect losses via the torque converter but not a DSG, id get it checked over

He means the 4x4...

He means the 4x4...

 

 

still an awful loss, 140ps-88ps? 

My previous car (PD105 Diesel) was 122 bhp (Flywheel) before remap when it was supposed to be 103.5 and current car (CR170 diesel) was 172 (flywheel) compared to the 168 official figure before remap. I'd be shocked if the numbers came in that low, even accounting for drivetrain losses. Was it a 4 wheel rolling road or was drive to the rear wheels disabled?

 

If the rear wheels were allowed to spin but power was only measured at the front wheels this might explain things. I suspect the rolling road calibration was off as drivetrain losses should not eat up 37% of the flywheel power without something feeling seriously off.

 

Also bhp (Brake Horse Power) and PS (Pferdestärke - German for horsepower, also known as 'metric horsepower') are not quite the same, which is why I only expect 168 bhp from a 170 PS engine.

still an awful loss, 140ps-88ps?

No it's not as its a the wheels, 140 is at the fly.

No it's not as its a the wheels, 140 is at the fly.

 

 

the loss in 2wd is usually only 20 bhp (ish)

 

im sure sharkman will have a graph somewhere

Consider a 140bhp fwd VW

 

Hmm...the dyno was a 4 roller version but I don't know whether it took readings from just the front wheels.

 

AFAIK the haldex in normal conditions runs 90% front drive 10% rear, so if dyno only took readings from the front drive

 

then that would account for some of the low BPH recorded?

 

However, figures are figures (they just surprised me) but the improvement in the drivability of the car has made the remap well worth while  :clap:  

 

Just one small point re the Mk11 Superb, why oh why did they swap the Main lights switch with the instrument panel

 

illumination cos now I can't see the lights switch because the steering wheel is blocking the view.   Just how often

 

do you change the level of illumination to the dash panel!!!

 

 

Hmm...the dyno was a 4 roller version but I don't know whether it took readings from just the front wheels.

 

AFAIK the haldex in normal conditions runs 90% front drive 10% rear, so if dyno only took readings from the front drive

  

 

Haldex4 is at least 60% RWD when the torque demand is above a certain threshold (basically when the car is accellerating) which would be the case during a dyno test.

 

Just how often

 

do you change the level of illumination to the dash panel!!!

 

 

Never, the same number of times I use the headlight switch.  It just stays in auto all the time, except for the 2 times a year there is fog.

I had my 4 x 4 done as the performance was at best mild. The DSG will sap even more performance, thankfully I've got the manual. I also have aquired the mondeo intelligent awd with a 150 motor, this is a lot more lively however I'm going to chip this and see what happens. It's got a display that shows which wheels are getting the power and in normal driving it's only the fronts , so in effect it's 2wd until you accelerate briskly or something happens ike snow or traction problems

Edited 24 February, 201610 yr by peterposh