ALMS Video: In-Car Theater Elkhart Lake, Werner/Luhr Audi R10

[MPME]

ALMS Video: In-Car Theater Elkhart Lake, Werner/Luhr Audi R10
Say hello to 191mph inside Audi's mighty R10 TDI as you take a wild ride with the winners of the last ALMS round at Elkhart Lake

Viewer's Guide:

AUTO-RACING - ALMS Video: In-Car Theater Elkhart Lake, Werner/Luhr Audi R10 - SPEEDtv.com

Direct Video Link: ALMS: In-Car Theater Elkhart Lake, Werner/Luhr Audi R10 - Brightcove

15 minutes of Audi R10 In-Car. Yum

[Turbo.Jenkens]

Thanks, nothing beats in-car without announcers. Its scary how fast the Field's car is on the straights. Is it just me or has the R10 grown louder since its inception?

[MPME]

Originally Posted by Turbo.Jenkens

Thanks, nothing beats in-car without announcers. Its scary how fast the Field's car is on the straights. Is it just me or has the R10 grown louder since its inception?

Amen and amen. The R10 is no louder--it's the mic being within 12" of the engine. According to a friend at the team, the R10 is as much as 25-30db quieter than the non-diesel cars.

The other interesting note was that the R10's actually produce quite a bit of noise, but it's at frequencies that the human ear doesn't readily capture. I'd guess dogs and dolphins love the car.

[Kitdy]

Originally Posted by MPME

The other interesting note was that the R10's actually produce quite a bit of noise, but it's at frequencies that the human ear doesn't readily capture. I'd guess dogs and dolphins love the car.

That's interesting - what is generating these higher frequencies, the turbos? I'd imagine that much of the frequency they generate is inaudible, but how loud is it in comparison with the engine?

And why exactly are the diesels so quite? I think someone here, possibly Henk said that the particulate filter had something to do with it - the filter absorbing a lot of the sound energy.

You wouldn't happen to have the figures for the inaudible frequencies would you MPME?

[MPME]

Originally Posted by Kitdy

That's interesting - what is generating these higher frequencies, the turbos? I'd imagine that much of the frequency they generate is inaudible, but how loud is it in comparison with the engine?

And why exactly are the diesels so quite? I think someone here, possibly Henk said that the particulate filter had something to do with it - the filter absorbing a lot of the sound energy.

You wouldn't happen to have the figures for the inaudible frequencies would you MPME?

Sorry, I don't--just remembered what I was told.

The filters play a role is the removal of sound energy, but the two main components of their quietness are the turbos and the lack of revs. With a redline of 5500rpms, the diesles don't get to the loud, barking heights of the 11,000rpm Porsches and Acuras.

[Kitdy]

Originally Posted by MPME

Sorry, I don't--just remembered what I was told.

The filters play a role is the removal of sound energy, but the two main components of their quietness are the turbos and the lack of revs. With a redline of 5500rpms, the diesles don't get to the loud, barking heights of the 11,000rpm Porsches and Acuras.

Wow only 5,500 I was wondering that that number was for some time and it's not readily available as far as I know.

What about the Pugs redline?

[MPME]

Originally Posted by Kitdy

Wow only 5,500 I was wondering that that number was for some time and it's not readily available as far as I know.

What about the Pugs redline?

I can't say for sure, but I did a fair amount of sound signature comparison between the two cars from video I shot at Sebring and while it has a different pitch, it doesn't sound to use any more or any less revs than the R10. Squeezing more revs out of a diesel is mighty hard--they could have a few hundred more, but I can't see a drastic difference.

I also learned that they use the exact same turbos as Audi, so intake plenums aside, there's a lot of commonality between the two powerplants--the level of diesel technology wouldn't allow for anything different.

What the two companies do for their 2nd gen diesel engines is what has me intrigued. The 1st gen's are the best they guessed to make, and now with a few years of solid lessons, I'd expect the performance envelope for diesels to jump quite a bit.

[Kitdy]

Originally Posted by MPME

I can't say for sure, but I did a fair amount of sound signature comparison between the two cars from video I shot at Sebring and while it has a different pitch, it doesn't sound to use any more or any less revs than the R10. Squeezing more revs out of a diesel is mighty hard--they could have a few hundred more, but I can't see a drastic difference.

I also learned that they use the exact same turbos as Audi, so intake plenums aside, there's a lot of commonality between the two powerplants--the level of diesel technology wouldn't allow for anything different.

What the two companies do for their 2nd gen diesel engines is what has me intrigued. The 1st gen's are the best they guessed to make, and now with a few years of solid lessons, I'd expect the performance envelope for diesels to jump quite a bit.

You're a veritable walking encyclopedia of obscure sportscar racing knowledge.

What company builds the turbos out of curiosity?

[Wouter Melissen]

Garrett

[ruim20]

Wow, the R10 looks so relaxed, must be a great drive!

Thanks!

[Dino Scuderia]

The Audi might have been hitting 191mph but the Intersport Lola was walking away from it on the straights...must have been hitting 196mph. Obviously less downforce on the Lola as it lost a lot of time in the brake zones and turns. Makes me wonder if they could have better balanced that setup and been right in there with the Audi's on a full lap.

The diesels are intriguing but a whole grid of them would be very boring to me. The sound of a screaming gas engine is half of the excitement. I fear someday 'alternative fuel' racing will be the end of my spectating.

[MPME]

Originally Posted by Dino Scuderia

The Audi might have been hitting 191mph but the Intersport Lola was walking away from it on the straights...must have been hitting 196mph. Obviously less downforce on the Lola as it lost a lot of time in the brake zones and turns. Makes me wonder if they could have better balanced that setup and been right in there with the Audi's on a full lap.

The diesels are intriguing but a whole grid of them would be very boring to me. The sound of a screaming gas engine is half of the excitement. I fear someday 'alternative fuel' racing will be the end of my spectating.

Agreed. I'd love to see an actual minimum decibel level rule established.

[RacingManiac]

Don't the particulate filter technology employed are virtually identical on the 2 cars as well? To my knowledge they are both made by Dow Automotive. And also the injector technology(Bosch)?

[MPME]

Originally Posted by RacingManiac

Don't the particulate filter technology employed are virtually identical on the 2 cars as well? To my knowledge they are both made by Dow Automotive. And also the injector technology(Bosch)?

Yes and yes!

[Wouter Melissen]

Originally Posted by RacingManiac

Don't the particulate filter technology employed are virtually identical on the 2 cars as well? To my knowledge they are both made by Dow Automotive. And also the injector technology(Bosch)?

I guess the biggest difference is the block angle.