Dynolicious

**Y2008** · 03-02-2009, 05:04 PM

Just wondering how many people from the Polo community have or use dynolicious? If yes, what is everyone using for their vehicle info for weight and drivetrain loss?

**leasaunce** · 03-02-2009, 10:22 PM

dirvetrain loss i think you put 12 or 15%. vehicle weight is around 1150kg. best way to go to a truck weighing depot.

**RhysQ** · 03-02-2009, 10:36 PM

Originally Posted by leasaunce

dirvetrain loss i think you put 12 or 15%. vehicle weight is around 1150kg. best way to go to a truck weighing depot.

drive train loss on 4 cyl FWD drive cars is about 20%, close to 25% for RWD and close to 30% for AWD.

claimed weight on a Polo GTI is 1190kg, but add fuel, passengers, brake fluid, washer fluid etc etc etc and it comes to about 1350kg.

**RoSonic** · 03-02-2009, 10:47 PM

On my registration certificate is mentioned 1298kg.

**pologti18t** · 04-02-2009, 09:30 AM

Drivetrain losses are not as simple as 20-30%.

Dyno of GTR (AWD remember) with driveline loss shown. It never ever gets to 30%.

At moderate RPM driveline losses are < 10%!

Driveline losses increase (absolute and %) as RPM/speed increased.

**JCM308** · 04-02-2009, 09:37 AM

I gave it a go the other night (but wasn't calibrated properly). I got 88kW and 0-100 in 10sec (just normal take off not launched). That was with a full tank and 2 people in the car. Am going to calibrate it properly and put in correct weight figures on the weekend and give it another go. So far have found that it takes 1-2 seconds to start regestering properly, I'm hoping that's because of the calibration.

**RhysQ** · 04-02-2009, 10:13 AM

Originally Posted by pologti18t

Drivetrain losses are not as simple as 20-30%.

Dyno of GTR (AWD remember) with driveline loss shown. It never ever gets to 30%.

At moderate RPM driveline losses are < 10%!

Driveline losses increase (absolute and %) as RPM/speed increased.

Thats a VERY big call. Trent had a dyno run with us in Brisane in his MKIV R32. On that day I managed 122.2kW atw (APR quoted 152kW at the fly) and he managed 122.1kW atw (VW quoted 177kW at the fly). Is that not a 31% loss for Trent. And hey, mine works out spot on 20%.

**Timbo** · 04-02-2009, 11:01 AM

FWIW, my S3 dynos 150Kwatw, against a rated engine output of 188Kw

Best to look at some of the dyno results in the UK/European forums, as they always calculate back to the fly from the wheel when producing dyno results, and their sheets nearly always include a drag factor (drivetrain loss).

(Personally, I think it makes dyno results, in terms of comparing the output of specific cars rather than the effect of tuning, even more mumbo-jumbo than the arguments we have here over simple measured wheel output

)

**madglf3** · 04-02-2009, 12:19 PM

Originally Posted by pologti18t

Drivetrain losses are not as simple as 20-30%.

Dyno of GTR (AWD remember) with driveline loss shown. It never ever gets to 30%.

At moderate RPM driveline losses are < 10%!

Driveline losses increase (absolute and %) as RPM/speed increased.

I think Attesa in the GTR uses mostly RWD until the rear wheels lose traction, hence it would mostly read as a RWD if it has traction (although I'm not too sure how much traction a near-500hp GTR has on a dyno).

**Spec83** · 04-02-2009, 01:11 PM

Originally Posted by madglf3

I think Attesa in the GTR uses mostly RWD until the rear wheels lose traction, hence it would mostly read as a RWD if it has traction (although I'm not too sure how much traction a near-500hp GTR has on a dyno).

Depends how many fat bastards / sand bags they can fit in the boot

I was standing in front of a 400+hp 808 on a dyno and they way it lurched forward half scared the crap out of me