I think this just reflects various opinions and experiences and all are valid to a degree.
What works for one may not work for another , whats deemed a good measurement for one may not be for another.
We tried to test on real road conditions, a number of runs with proper real road airflow.
Rolling road would be great but open bonnet runs wouldnt reflect the same conditions as on road and difficulty with getting proper airflow would have melted a car after 25 odd runs testing all the setups we did.
I agree initial pickup after a stationary period could be effected by some hot air but when you are motoring, the turbo will have drawn through more than enought to be taking all frontal airflow coming into the bay so where you have seen powerloss may be due to the S3 design over the TT's and R32 allbeit they are similar cars.
Our 225 TT consitantly gets 290+ bhp on rollers which is not far short of a k04's theoretical max, running a neuspeed Pflow(and obviously its other mods)
Vagcom is a tool and air mass flow is a direct airflow sensor measurement, not really a guess at all it may not be considered a measurement for power but it is a direct measure of flow and we used that as our measurement for differences of each induction setup.
As you can see there are so many variables in testing, on road, rolling road, real airflow, simulated airflow, Why did Audi not do it, Why do BTCC not do it, why do Neuspeed / K&N sell kits... etc etc...
Sealed cold air feed..... Food for thought....
This was suggested to me , take a straw suck through it, make the straw longer, suck through it... it will be harder.
potentially a seal cold air feed will cause an initial pickup lag as you havent started moving and the turbo is having to suck harder as you have extended the "straw" to the turbo.
Also sealed frontal cold air feed may be a recipe for disaster if there is nothing to diffuse any water ingestion, All the Audi designs I've seen attempt to diffuse flow to allow water to drop from what I have seen.
There are so many opinions to factor in and consider this debate will be a hard one to conclude.
Stick to what you know and what you feel to be correct is all you can do!
What works for one may not work for another , whats deemed a good measurement for one may not be for another.
We tried to test on real road conditions, a number of runs with proper real road airflow.
Rolling road would be great but open bonnet runs wouldnt reflect the same conditions as on road and difficulty with getting proper airflow would have melted a car after 25 odd runs testing all the setups we did.
I agree initial pickup after a stationary period could be effected by some hot air but when you are motoring, the turbo will have drawn through more than enought to be taking all frontal airflow coming into the bay so where you have seen powerloss may be due to the S3 design over the TT's and R32 allbeit they are similar cars.
Our 225 TT consitantly gets 290+ bhp on rollers which is not far short of a k04's theoretical max, running a neuspeed Pflow(and obviously its other mods)
Vagcom is a tool and air mass flow is a direct airflow sensor measurement, not really a guess at all it may not be considered a measurement for power but it is a direct measure of flow and we used that as our measurement for differences of each induction setup.
As you can see there are so many variables in testing, on road, rolling road, real airflow, simulated airflow, Why did Audi not do it, Why do BTCC not do it, why do Neuspeed / K&N sell kits... etc etc...
Sealed cold air feed..... Food for thought....
This was suggested to me , take a straw suck through it, make the straw longer, suck through it... it will be harder.
potentially a seal cold air feed will cause an initial pickup lag as you havent started moving and the turbo is having to suck harder as you have extended the "straw" to the turbo.
Also sealed frontal cold air feed may be a recipe for disaster if there is nothing to diffuse any water ingestion, All the Audi designs I've seen attempt to diffuse flow to allow water to drop from what I have seen.
There are so many opinions to factor in and consider this debate will be a hard one to conclude.
Stick to what you know and what you feel to be correct is all you can do!