Dyno and stock Rs6

[Tadass910]

Did you guys dynoed your stock car? As I understand numbers are higher than 560 hp, in here stock car gets 640 hp https://youtu.be/XeEOSly_Vxg here stock 615 hp https://youtu.be/ojwiAsyDyNc
I wonder do Miltek exhaust adds some hp to a car or not? I suppose it's lighter than stock Rs6 exhaust right?

[MikeFish]

Hmmm. 615 seems high for a non Performance model. Previous tests I've seen on a known dyno (MRC) were around 580ps mark. My car on there made about 613ps.
And 640hp, from a standard car!?!?!?!?!?! No way. The maunfacturers figures are conservative, but not by that much. The graphs on the screen were showing just over 500hp, I assume that is the uncorrected figure, so he has added another 140 odd hp on for losses.

I doubt any cat back exhaust will add any HP to the car. It might be lighter but how much difference is that going to make on a car that still weighs nearly 2 ton. And with 700NM it won't really make any noticable difference.
However, a Milltek turbo back system (or any catless downpipes) will give an increase. I think it has been stated on here before that a stage 1 map will give about 700ps, if you add a turbo back exhaust and remap it will give about another 50ps. Not sure how much gain will be had with a turbo back exhaust on a standard car with no remapping. Probably good for 10-20bhp I'd say.

[Tadass910]

Hmmm. 615 seems high for a non Performance model. Previous tests I've seen on a known dyno (MRC) were around 580ps mark. My car on there made about 613ps.
And 640hp, from a standard car!?!?!?!?!?! No way. The maunfacturers figures are conservative, but not by that much. The graphs on the screen were showing just over 500hp, I assume that is the uncorrected figure, so he has added another 140 odd hp on for losses.

I doubt any cat back exhaust will add any HP to the car. It might be lighter but how much difference is that going to make on a car that still weighs nearly 2 ton. And with 700NM it won't really make any noticable difference.
However, a Milltek turbo back system (or any catless downpipes) will give an increase. I think it has been stated on here before that a stage 1 map will give about 700ps, if you add a turbo back exhaust and remap it will give about another 50ps. Not sure how much gain will be had with a turbo back exhaust on a standard car with no remapping. Probably good for 10-20bhp I'd say.

Thanks Mike, yea maybe 580 hp or near 600 hp on stock non performance version is a real numbers, but not 40 hp as you say

[ics3s]

The second one (blue) is from my city. And from what i heard among friends, its either PE or has ECU upgrade. The guys that make the dyno are specialised in chip tuning and aftermarket parts.

[MikeFish]

The second one (blue) is from my city. And from what i heard among friends, its either PE or has ECU upgrade. The guys that make the dyno are specialised in chip tuning and aftermarket parts.

The date on the dyno says May 2015 so definitely not a PE.

[shanek]

My Performance edition dynoed 615bhp at the crank with only 3,000miles on the clock and the only mod a K&N filter.

600 stock from a standard RS6 seems very unrealistic.

[MikeFish]

My Performance edition dynoed 615bhp at the crank with only 3,000miles on the clock and the only mod a K&N filter.

600 stock from a standard RS6 seems very unrealistic.

Mine did 613ps with 1600 miles on the clock.

Edit; just realised i said that already further up the page!

[Markp]

I don't want to appear a naysayer but I am not convinced by these figures. Audi use AVC and other similar equipment (costing 2 million plus) to measure output at the crank in perfect conditions. Tuners use much less sophisticated equipment that estimates output and tweaking the many variables can lead to very different results. The only thing you can be really sure of using roller driven dynos is if the gains before and after a mod if you use the same kit on the same day.

[Tadass910]

My Performance edition dynoed 615bhp at the crank with only 3,000miles on the clock and the only mod a K&N filter.

600 stock from a standard RS6 seems very unrealistic.

I think standard Rs6 with 560 hp can dyno about 580 hp and with aftermarket exhaust can go nearly 600 hp

[dasquade]

Maybe me, but why is everybody so 'obcest' with HP numbers. Correct me from wrong but isn't torque more important ?
(from what i know HP more impact on top end speed, where as torque is the pushing power....right?)
Recently found you could log the torque output live (at least with my obdeleven app, crank Nm offcourse). Not sure how accurate that is tough but seams to be what tuner had advertised (second hand car, no dyno papers).
Not sure if one can log HP values, at least didn't found it.

[MartayMcFly]

Maybe me, but why is everybody so 'obcest' with HP numbers. Correct me from wrong but isn't torque more important ?
(from what i know HP more impact on top end speed, where as torque is the pushing power....right?)
Recently found you could log the torque output live (at least with my obdeleven app, crank Nm offcourse). Not sure how accurate that is tough but seams to be what tuner had advertised (second hand car, no dyno papers).
Not sure if one can log HP values, at least didn't found it.

bhp is calculated from torque anyway.

[Markp]

Maybe me, but why is everybody so 'obcest' with HP numbers. Correct me from wrong but isn't torque more important ?
(from what i know HP more impact on top end speed, where as torque is the pushing power....right?)
Recently found you could log the torque output live (at least with my obdeleven app, crank Nm offcourse). Not sure how accurate that is tough but seams to be what tuner had advertised (second hand car, no dyno papers).
Not sure if one can log HP values, at least didn't found it.

bhp is calculated from torque anyway.

Indeed. HP = Torque x RPM ÷ 5252. Or Torque = HP multiplied by 5252 divided by RPM.

[wildbore]

Just because they are related mathematically doesn't make them the same thing. You want to reach maximum velocity, you need power, not torque. You want to accelerate, you need torque, not power.

[MikeFish]

I don't want to appear a naysayer but I am not convinced by these figures. Audi use AVC and other similar equipment (costing 2 million plus) to measure output at the crank in perfect conditions. Tuners use much less sophisticated equipment that estimates output and tweaking the many variables can lead to very different results. The only thing you can be really sure of using roller driven dynos is if the gains before and after a mod if you use the same kit on the same day.

Which figures are you talking about, the OPs or the Performance ones?

I've no doubt that Audi have accurate testing machines and bench test their engines so they know exactly what they are producing but this doesn't mean to say that this is the figure they publish.
I have seen these dyno companies give readings on new engines very close to the manufacturers figures on NA RSs like the B7 and B8 so I think they are more accurate than you give them credit (by the same token I'm not stupid and understand some companies inflate figures for their own means. And I agree, they should only be used for comparative purposes rather than hard evidence of an engines output).
And I've seen most of the turbo RS cars report higher than stock figures on the same dynos run by the same technicians. I think the reason for this is that the turbo cars are much more sensitive to changes (atmospheric, octane etc) and tolerances so Audi can't reproduce the figures as consistently so they give a conservative figure that all cars will manage as a minimum but most cars will be higher than this 'minimum' number.
But 615 and 640 from a stock non Performance car? Not likely.

[W8PMC]

I don't want to appear a naysayer but I am not convinced by these figures. Audi use AVC and other similar equipment (costing 2 million plus) to measure output at the crank in perfect conditions. Tuners use much less sophisticated equipment that estimates output and tweaking the many variables can lead to very different results. The only thing you can be really sure of using roller driven dynos is if the gains before and after a mod if you use the same kit on the same day.

Which figures are you talking about, the OPs or the Performance ones?

I've no doubt that Audi have accurate testing machines and bench test their engines so they know exactly what they are producing but this doesn't mean to say that this is the figure they publish.
I have seen these dyno companies give readings on new engines very close to the manufacturers figures on NA RSs like the B7 and B8 so I think they are more accurate than you give them credit (by the same token I'm not stupid and understand some companies inflate figures for their own means. And I agree, they should only be used for comparative purposes rather than hard evidence of an engines output).
And I've seen most of the turbo RS cars report higher than stock figures on the same dynos run by the same technicians. I think the reason for this is that the turbo cars are much more sensitive to changes (atmospheric, octane etc) and tolerances so Audi can't reproduce the figures as consistently so they give a conservative figure that all cars will manage as a minimum but most cars will be higher than this 'minimum' number.
But 615 and 640 from a stock non Performance car? Not likely.

I tend to agree & the proof is usually by using a dyno you know well & have run several different cars on. The adjustment for crank to wheel HP is where some will inflate the figures for their own benefit, however they SHOULD be using the Mfctrs/industry adjustment to calculate these so should be bang on the money in terms of accuracy.

My M5 was dyno'd stock at just over 600bhp, yet the Mfctrs brochure figures state i think 560ish, however almost every M5\6 they've run on the same dyno produced between 25-50bhp over the suggested stock figures & i'd be confident the same would apply to the C7 RS6.