Aftermarket Performance Air Filter

[sk546]

Originally Posted by Zebster

Here's one that must have been...

Ok, the original quoted 45bhp and 60lbft was against a different power graph done on my car which recorded 615bhp & 550lbft but these are the comparison charts prepared for Audi.
Orange is OEM air filter, Red is with K&N= 25bhp and 40lbft. Powdered Unicorn Horn it is then!!!

[Zebster]

Originally Posted by sk546

Ok, the original quoted 45bhp and 60lbft was against a different power graph done on my car which recorded 615bhp & 550lbft but these are the comparison charts prepared for Audi.
Orange is OEM air filter, Red is with K&N= 25bhp and 40lbft. Powdered Unicorn Horn it is then!!!

More likely an inconsistent dyno measurement, seeing as it was done on a different day.

I note the claimed gain has fallen from 45 to 25 bhp, so getting within the likely dyno error.

[XC90Mk1]

Originally Posted by sk546

Ok, the original quoted 45bhp and 60lbft was against a different power graph done on my car which recorded 615bhp & 550lbft but these are the comparison charts prepared for Audi.
Orange is OEM air filter, Red is with K&N= 25bhp and 40lbft. Powdered Unicorn Horn it is then!!!

That’s within 4% which is closer than the repeatable accuracy of the equipment.

You will not get 25bhp out of an air filter

[sk546]

Originally Posted by XC90Mk1

That’s within 4% which is closer than the repeatable accuracy of the equipment.

You will not get 25bhp out of an air filter

TBH, I couldn't agree more. Im only showing you the proof of what I'm saying as I hate unsubstantiated claims.
The guys who did the power run (who do this day in, day out) said the same thing before the run but were quite shocked at the result. That's why they were accusing Audi of doing something else to the car other than just putting the K&N filter back in the airbox.

But getting back on topic, I take that no-one on here has fitted one as yet?
Looks like I will be the 'Test Puppet' after all!!

[Chief inspector]

Originally Posted by sk546

TBH, I couldn't agree more. Im only showing you the proof of what I'm saying as I hate unsubstantiated claims.
The guys who did the power run (who do this day in, day out) said the same thing before the run but were quite shocked at the result. That's why they were accusing Audi of doing something else to the car other than just putting the K&N filter back in the airbox.

But getting back on topic, I take that no-one on here has fitted one as yet?
Looks like I will be the 'Test Puppet' after all!!

I’d say a higher octane of fuel and thus more advance, or as you say something mechanical has been done, duff injector fixed, turbo actuator or similar.

Is this a K&N panel in the original air box?

A lot of Dyno stuff with intakes is done with the bonnet open so it doesnt overheat, so avoids ingesting hot air like in the real world. OEM exhaust manifolds are usually rubbish though as its major money to engineer a proper one in a tight engine bay.

[sk546]

Originally Posted by Chief inspector

I’d say a higher octane of fuel and thus more advance, or as you say something mechanical has been done, duff injector fixed, turbo actuator or similar.

Is this a K&N panel in the original air box?

A lot of Dyno stuff with intakes is done with the bonnet open so it doesnt overheat, so avoids ingesting hot air like in the real world. OEM exhaust manifolds are usually rubbish though as its major money to engineer a proper one in a tight engine bay.

Yup, its just a K&N cone filter in stock air box (OEM filter is also a cone filter but with a foam cover causing more air restrictions).

Car was always run on 99 octane so no change there and bonnet was open with a 'big ass fan' blowing lots of air into the grills to replicate forward motion during all runs completed.
Quite baffling.

[XC90Mk1]

Originally Posted by sk546

Yup, its just a K&N cone filter in stock air box (OEM filter is also a cone filter but with a foam cover causing more air restrictions).

Car was always run on 99 octane so no change there and bonnet was open with a 'big ass fan' blowing lots of air into the grills to replicate forward motion during all runs completed.
Quite baffling.

Modern foam is usually graduated and often offers similar rfficiency to the updated ones.

[gaby]

Originally Posted by Chief inspector

I’d say a higher octane of fuel and thus more advance.

I wonder if that is so.
During its lean phase, the engine runs as lean as possible, the limit measured by the knock sensor.
Since higher octane fuel resists knocking better, advance will be retarted more
before knocking occurs.

[sk546]

So, just resurrecting this thread as I now have both my new Volvo and the performance air filter to try out in it (will be installing on Friday when I get home).
I am still wondering if there is anyone on the forum with a T5, T6 or T8 that has installed and if so, have you gained anything? I'm mostly interested in knowing if there is any more supercharger whine coming out of the engine bay.
I look forward to the standard comments asking 'why are you changing something the OEM had spent decades perfecting'.

[gaby]

Originally Posted by sk546

I am still wondering if there is anyone on the forum with a T5, T6 or T8 that has installed and if so, have you gained anything?

Some noise perhaps?