THEY'RE ON!!! (Long)

05-31-2003, 06:51 AM

I've just driven the 911 for the first time with the new SSI's and Dansk 2 in 1 out 84mm tail pipe muffler.

The heating still needs to be connected, but with awesome weather who cares

So what are my impressions?

Sound...:

The car has been totally transformed. At startup it's much louder than stock and sputters and screams for a couple of seconds. Then it settles down to a steady and louder than stock idle. The idle sound is quite more aggressive than stock and not so deep. There is a noticeable deep tone, but it never gets dominant because it's "harder" in the sound than the stock deep and mellow sound.

Driving under normal conditions is so unlike the stock exhaust experience. The whole feel of the car has been changed. It feels much more peppery. At low revs it has a really deep and crisp hard sound that is sufficiently restrained not to become resonanse or droning. You constantly hear the air fan whirr in the background just like you could with the stock exhaust. So it's different, but still sounds like a 911. At motorway speeds it's a silent as the stock exhaust (a perfect compromise).

When really pushing the car it sounds fantastic. It sounds as if it takes more revs faster and the 6500 rpm cutoff seems to come far too early. The car feels and sounds like it could go far beyond. The gas pedal seems to have 2 positions only; on and off

With the stock exhaust I had a deep and brutal sound at maximum acceleration (I have a cone K&N). With the new exhaust it's still deep, but changes to an aggressive loud scream. Luckily it still sounds like a 911 and have the whirr of the air fan in the background.

All in all I love this new exhaust!

It's louder, meaner and more exotic. The car feels more exotic in a Ferrari-like way. BUT IMPORTANTLY it doesn't seem to suffer from typical exotic flaws like resonance/droning, popping, caughing or anything similar. It's so clean in the sound and still agressive and exotic at the same time. At maximum acceleration I sometimes get a very loud "BANG" from the exhaust pipe when changing up. I like that

Performance...:

Well the rolling road test has yet to be performed. Based on the seat of the pants feel I'd say that there is almost no difference in performance. The car certainly feels faster, but I think the sound makes me feel that way.

Still I think the engine seems to pull a little stronger than usually just above 3000 rpm. Between 4000 and 5000 revs it certainly feels more eager, no doubt. Otherwise no noticeable changes.

So now I have a meaner 911 that is still suitable for everyday driving. Exactly what I wanted!

Moses · 05-31-2003, 07:15 AM

Great description of a Dansk at work.

I'm surprised that the SSI's don't give a noticeable performance boost.

Doug Zielke · 05-31-2003, 07:19 AM

When I bought my SSI's, I asked Brad Roberts which muffler *he* recommended. Without hesitation, he said the Dansk 2/1.
I'm glad I took his advice, as I'm very pleased with the sound and performance.

If and when SSI builds a complementary muffler for their HE's, I will be the first in line to buy one, but for now the Dansk is it.

05-31-2003, 07:55 AM

Quote:

Originally posted by Moses

I'm surprised that the SSI's don't give a noticeable performance boost.

Actually I feel the same way. The pre SSI rolling road test showed a pretty amazing result of 232HP at the rear wheels so maybe that's the reason?

05-31-2003, 09:57 AM

Just found out that the clutch arm is touching the drivers side heat exchanger.

kstylianos · 05-31-2003, 11:32 AM

Mikkel,

I have the same mods (SSI's w/ Dansk 2-1) waiting for installation on my 3.0. Nice description of the transformation, I can't wait

dickster · 05-31-2003, 12:01 PM

so you're saying you like it??

how bout some pics??

ksearles · 05-31-2003, 02:13 PM

Mikkel,

I'm glad to hear that you're happy with the Dansk sound and "butt-dyno" results. After browsing the many threads on exhaust choices, it seems that you were once also interested in the DP 11 exhaust from DP Motorsport.

I too am interested in the DP 11 (with the exception of the $1700 USD price tag

). Have you listened to this system before, and if so, could you please give a description of the sound (since your write-up on the Dansk was so good)...

Regards, Kevin

Joeaksa · 05-31-2003, 03:42 PM

Mikkel,

We warned you !!!

I felt the same way about my experience when taking the stock exhaust off and going with the SSI's. Only change is that my car felt like it had more power and rev'ed a lot easier.

Joe

06-01-2003, 10:32 AM

Quote:

Originally posted by dickster
so you're saying you like it??

how bout some pics??

Like it? Well...YES

Pics....

I don't have a digital camera so it'll take some time. Luckily I went to a Porsche Club Sweden gathering at Ring Knutstorp today so the film has been used up

Now it only needs to be developed.

06-01-2003, 10:36 AM

Quote:

Originally posted by ksearles
Mikkel,
After browsing the many threads on exhaust choices, it seems that you were once also interested in the DP 11 exhaust from DP Motorsport.

I too am interested in the DP 11 (with the exception of the $1700 USD price tag ). Have you listened to this system before, and if so, could you please give a description of the sound (since your write-up on the Dansk was so good)...

Regards, Kevin

Correct. I have shown interest in the DP11 muffler which happens to be very expensive.

Sadly I haven't experienced it "live". My interest was based mainly on the reports from many German 911 owners and a single wav recording.

06-01-2003, 10:42 AM

Quote:

Originally posted by Joeaksa
Mikkel,

We warned you !!!

I felt the same way about my experience when taking the stock exhaust off and going with the SSI's. Only change is that my car felt like it had more power and rev'ed a lot easier.
Joe

Heh heh yeah you did.

And I'm glad you did that.

I too feel that it revs faster. If it actually feels stronger I'm still not sure. I've only done 2 trips in the car and my judgement is probably overwhelmed by the sound and first impressions. Maybe in a week's time or so I'll be better able to decide if it actually feels stronger. For now the only thing I notice is the sound

ksearles · 06-01-2003, 12:36 PM

Mikkel,

I gather that other folks you spoke to regarding their DP11 experiences were positive about the sound/performance of the muffler. Did you happen to retain a copy of the DP11.wav file that you could pass along?

Regards,

Kevin

06-01-2003, 10:44 PM

Kevin

Yes the Germans seem to worship the DP11 muffler. I have been in contact with DP Motorsport in Germany and they stated that no performance gains were expected from their muffler. I think this is because they're honest and not because the DP11 is worse than other aftermarket mufflers.

I have a small .wav file that I can send you, but I need your e-mail.

If you undestand German you should do a search for DP11 at www.elfertreff.de You could also ask Heiko at www.944-fans.de if he has a sound recording of a DP11. He has a large collection of Porsche sounds and movies so perhaps he also has one with a DP11?

Bo · Bo's Garage

Did a Google-search on the DP-system (which by the way sounds very, VERY nice!) and found some soundbytes at:
http://www.944-fans.de/Stammtisch-K-BN-2/Stammtisch-K-BN-2.htm
I want this for my Cab

Brad Roberts · 06-01-2003, 11:21 PM

Mikkel,

Be sure to email a me a pic of the clutch arm touching the HE's. I'm interested in seeing which clutch arm you have. I know that porsche used about 5 different arms over the years on 915's and 930's.

Glad your happy (we secretly knew you would be).

B

06-02-2003, 12:40 AM

Quote:

Originally posted by Brad Roberts
Mikkel,
Be sure to email a me a pic of the clutch arm touching the HE's. I'm interested in seeing which clutch arm you have. I know that porsche used about 5 different arms over the years on 915's and 930's.

Glad your happy (we secretly knew you would be).
B

Sure, but please be patient. No digital camera (I really really should buy one) plus I'll need to borrow a workshop lift.

BTW my sceptical mechanic isn't so sceptic anymore. After driving my car with the new exhaust he smiled and said that it sounded very good in an old fashioned racing-like kind of way.

He's busy with his racing hobby for about a week now so no news until next week (heater needs to be sorted + perhaps adjustment to the clutch).

06-02-2003, 12:47 AM

Hey Bo. Were you at Knutstorp sunday the 1. june? A 911 that looked exactly like your's decided to go straight ahead with its rear end first at the end of the long straight at the sharp curve?

Hope it wasn't you

06-02-2003, 08:55 AM

Just did some quick pics of the clutch arm and HE. Sorry for the bad quality. I just held the camera in under the car and couldn't see what I was doing.

06-02-2003, 09:42 AM

Quote:

Originally posted by Joeaksa
Mikkel,

Only change is that my car felt like it had more power and rev'ed a lot easier.

Joe

Correction:

I drove the car again. Yes you're right. It does feel stronger and it does rev easier/faster, no doubt about that.