the RS5 from OZ ...

[hlbeckley]

Simply insane.....the stock headers look pretty restrictive in comp to your k-lines....love this thread....more videos though please

[marzz]

Simply insane.....the stock headers look pretty restrictive in comp to your k-lines....love this thread....more videos though please

cheers, more stuff to come this year ...
the stock headers are generating loads of heat, KLine are keeping temps way lower:



lower intake temps, less restrictive headers => more torque
KLine headers are very well designed, the length is just spot on, stretching the torque on both bottom and top end, considering the tight space the guys done exceptional job, they are the only ones in the world offering this headers, worth the money for me.

more videos coming ... trying to find someone to take them ...

[sakimano]

Your AFR is pig rich. Who tuned it?

Also when did you do the before log of intake temperature vs the after log? If they were very different conditions that could explain the huge delta.

[sakimano]

also, from the looks of your dyno (that's an excel sheet) your modifications have cost you 107 hp . A kw = 1.34 hp.

So 256 kw = 343 hp.

WTF?

Obviously not the case. Just syaing, either my interpretation of kw vs. hp is drastically wrong, or that excel chart is way out to lunch.

the dyno run was a little off as the dude only pressed the pedal to the metal from 3k revs, the car actually pulls from 2k revs, will be another run soon

so at all wheels we made 256kW and 438Nm

[MikeFish]

Your AFR is pig rich. Who tuned it?

Also when did you do the before log of intake temperature vs the after log? If they were very different conditions that could explain the huge delta.

Not sure if you mean altitude, humidity etc or just ambient temps. If it is ambient temps you are talking about it has them on the left hand side; 30 degrees for 1st run and 20 degree for the 2nd run. But I am guessing you already saw this and were referring to humidity etc. I would assume altitude is the same as it would have been the same dyno.

[sakimano]

Your AFR is pig rich. Who tuned it?

Also when did you do the before log of intake temperature vs the after log? If they were very different conditions that could explain the huge delta.

Not sure if you mean altitude, humidity etc or just ambient temps. If it is ambient temps you are talking about it has them on the left hand side; 30 degrees for 1st run and 20 degree for the 2nd run. But I am guessing you already saw this and were referring to humidity etc. I would assume altitude is the same as it would have been the same dyno.

Ahh sorry, I missed that reference to what ambient actually was. I also just noticed the 'theoretical' line. So that leads to what I was saying. We're seeing a drop of 10 degrees ambient temp on the before/after readings, and a drop of 25-30 degrees of IAT on the before after. Not sure I would give much credence to the headers resulting in a massive change to intake air temps. More like heat soak and ambient temperature differences are the cause.

The headers will help the car evacuate exhaust more effectively if they're well designed and that will more effectively draw in air on the intake side, however it won't alter the temperature of intake air by this much (even the theoretical line is ambitious).

On the B7 RS4, the intake air temperature sensor is located in the MAF tube. If it's in a similar location on the RS5, there's really very little chance the headers are influencing that reading...especially to the extent those numbers differ.

the flow is as follows:
fresh air enters front of car -> intake snrokel -> air box -> intake maf tubes (possible IAT sensor location) -> throttle bodies -> intake manifold -> engine cylinders -> exhaust manifold (Kline headers) -> downpipes -> catback -> tips -> environment as exhaust gas

The headers are so far downstream, I seriously doubt they have a big enough influence to even see.

[marzz]

Your AFR is pig rich. Who tuned it?

Also when did you do the before log of intake temperature vs the after log? If they were very different conditions that could explain the huge delta.

suggestions on AFR corrections?
dyno conditions were very similar, same place, same fan system, same car etc, the difference is only in ambient temps 30C vs 20C, the supplied data is of the same dyno computer, not sure about you point here

[sakimano]

It lies in the tune's air fuel ratio. It's running rich for an na car. Almost like stock. Not optimal for making power. Too much fuel.

As for the power question I had I just realised your numbers were wheel horsepower. So 343 whp makes more sense. What did it put down when it was stock?

[marzz]

also, from the looks of your dyno (that's an excel sheet) your modifications have cost you 107 hp . A kw = 1.34 hp.

So 256 kw = 343 hp.

WTF?

Obviously not the case. Just syaing, either my interpretation of kw vs. hp is drastically wrong, or that excel chart is way out to lunch.

the stock RS5 pulls 200-220kW and about 330Nm at all wheels, we pulling 256kW and 438Nm so no cost but gain the way I see it ...
what you are talking about are figures of the crank as supplied by Audi 331kW/430Nm, add on losses of the gearbox, quattro system and heavy 20" wheels and you are down on power hard, same story as B7 RS4 pulling about 200kW ATW as stock

provided excel chart is exact image of the raw data taken of the dyno not just a power run print out with no actual data points.

re AFR, it was tuned for daily drive not for maximum power, pretty much to see where we are at for the moment, also the temps in AU get really high so leaning it out may not be the best option, but may not go tune stage 2 as may be jumping to stage 3 soon ...

what I wanted to point out is not so much the pick gain but the lift and stretch of the torque curve,
in a real world - launching the stock RS5 can give you a buzz but launching this one lets you actually burn all four tires if you wish ...

[hlbeckley]

Torque seems to be the fogotten element these days....loads of local tuning boys all hunting headline HP/KW but no-one talks torques....nice work mate

Would you consider charger work later or make the jump to an R8?

[marzz]

Torque seems to be the fogotten element these days....loads of local tuning boys all hunting headline HP/KW but no-one talks torques....nice work mate

Would you consider charger work later or make the jump to an R8?

We all pay for HPs but drive the torque ... may as well start there ... that's what stock RS5 is missing, that extra Nm's make huge difference ...
Have considered the blower already, work in progress, hopefully another month or so ... need for more torque.
R8 is on the cards for next project, but never know, so far loving the RS ...

[sakimano]

also, from the looks of your dyno (that's an excel sheet) your modifications have cost you 107 hp . A kw = 1.34 hp.

So 256 kw = 343 hp.

WTF?

Obviously not the case. Just syaing, either my interpretation of kw vs. hp is drastically wrong, or that excel chart is way out to lunch.

the stock RS5 pulls 200-220kW and about 330Nm at all wheels, we pulling 256kW and 438Nm so no cost but gain the way I see it ...
what you are talking about are figures of the crank as supplied by Audi 331kW/430Nm, add on losses of the gearbox, quattro system and heavy 20" wheels and you are down on power hard, same story as B7 RS4 pulling about 200kW ATW as stock

provided excel chart is exact image of the raw data taken of the dyno not just a power run print out with no actual data points.

re AFR, it was tuned for daily drive not for maximum power, pretty much to see where we are at for the moment, also the temps in AU get really high so leaning it out may not be the best option, but may not go tune stage 2 as may be jumping to stage 3 soon ...

what I wanted to point out is not so much the pick gain but the lift and stretch of the torque curve,
in a real world - launching the stock RS5 can give you a buzz but launching this one lets you actually burn all four tires if you wish ...

Sounds like fun. Not sure I've seen any stock rs5 dynos really to compare to but I would assume they would be right around 340-360 whp, of course that's entirely dyno dependant.

With respect to lighting up all four tires that's entirely easy on the b7. I'm sure being a manual helps.

https://www.youtube.com/watch?v=BoV0lB3g3kE

[marzz]

Stainless brake lines arrived from ECS, installation soon ...

[marzz]

new Stilo just arrived, some more track sessions this summer ...

[sakimano]

Still no timeslips?