Air cooled vs water cooled exhaust and engine sounds
#46
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This is a 'slightly' modded naturally aspirated air cooled engine.
Warning may cause swelling.
BTW, I much prefer the sound of my air cooled engine over my '11 3.8 GT3RS with race exhaust, neither will make sound limits in California but the 993 sounds so sweet and revs so freely...pure sex.
https://youtu.be/3p3rYipkVbw
Warning may cause swelling.
BTW, I much prefer the sound of my air cooled engine over my '11 3.8 GT3RS with race exhaust, neither will make sound limits in California but the 993 sounds so sweet and revs so freely...pure sex.
https://youtu.be/3p3rYipkVbw
#48
Instructor
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hey stranger friends! So i took the dive and just got an 88 3.2. Its got some lame dynomax muffler on it currenlty so i plan on getting either a dansk or mand k muffler. Do u all know the sound difference between the different sizes of the dansk mufflers??
thanks again!
leon
thanks again!
leon
#49
Rennlist Member
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hey stranger friends! So i took the dive and just got an 88 3.2. Its got some lame dynomax muffler on it currenlty so i plan on getting either a dansk or mand k muffler. Do u all know the sound difference between the different sizes of the dansk mufflers??
thanks again!
leon
thanks again!
leon
#50
Drifting
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I have a Dansk Sport 2 in 1 out and SSI's. Great sound and nice performance bump (from SSI's) and weight savings. Highly recommend this setup. Only downside is emissions testing in CA
#52
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http://www.butzisquared.com/2013/09/...gers-are-back/
#54
Instructor
Thread Starter
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So i'm unfortunately in CA so I will most likely need to get some type of CA legal cat to go with a Dansk Sport muffler. I've seen lots of posts on here that the Dansks are a great product for the money.
Any suggestions on the cats? i would love to go the route of the SSIs and the muffler BUT i doubt that would fly in Cali unless someone has some info i don't know about.
Thanks!
leon
Any suggestions on the cats? i would love to go the route of the SSIs and the muffler BUT i doubt that would fly in Cali unless someone has some info i don't know about.
Thanks!
leon
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#55
Addict
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SSI was a German company name. I've never seen any reference to the origin.
http://www.butzisquared.com/2013/09/...gers-are-back/
http://www.butzisquared.com/2013/09/...gers-are-back/
#56
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Tobias Aichele, Porsche 911: Engine History & Development Hardcover – July, 1999
only specific thing I recall re development (besides killing the horrid CIS) is that PAG wanted to ensure better emissions and fuel economy with each hp or torque increment - 3.2L had slightly less torque IIRC
re sound:
think of 3 routes
1. exhaust noise
2. induction noise
3. noise transmitted thru the engine case (or maybe to the tranny too) - this will esp. include the timing chains and an air-cooled motor will have more of this transmitted than a water-cooled one
then there is fan noise
only specific thing I recall re development (besides killing the horrid CIS) is that PAG wanted to ensure better emissions and fuel economy with each hp or torque increment - 3.2L had slightly less torque IIRC
re sound:
think of 3 routes
1. exhaust noise
2. induction noise
3. noise transmitted thru the engine case (or maybe to the tranny too) - this will esp. include the timing chains and an air-cooled motor will have more of this transmitted than a water-cooled one
then there is fan noise
#57
Drifting
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Originally Posted by 09mageec
After more than a year, I still don't know what the acronym SSI means....
they were out of Novato, CA until they were purchased by Dansk (or their parent company)
#58
Poseur
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Hello all!
i was curious for those who have both air cooled and water cooled how would you compare the exhaust and engine sounds?
i am curious to how a similarly modded air cooled compared to water cooled? I hear all this hype about air cooled sounds but when i look on youtube the 80s cars even when modded dont sound as aggressive as the 996/997 cars. Maybe im watching the wrong vids??
thanks
i was curious for those who have both air cooled and water cooled how would you compare the exhaust and engine sounds?
i am curious to how a similarly modded air cooled compared to water cooled? I hear all this hype about air cooled sounds but when i look on youtube the 80s cars even when modded dont sound as aggressive as the 996/997 cars. Maybe im watching the wrong vids??
thanks
Sadly, when the 996 Porsche, the first watercooled 911 to reach big production numbers, was designed with little regard for sound. They learned how important that was to the customer so they quickly began a program to develop the sport exhaust. The OEM Sport exhaust on my 997S was tuned specifically for my cabriolet, by Porsche. They recognized the importance, finally, of sound to the owner. I specifically avoided a water cooled turbo Porsche because I felt that they were too muffled. Nothing matched my 1981 turbo, but my 2006 with PSE has its own special sound which makes it a winner. So much so that one day, not long after I got the car, I had a gentleman in a Carrera GT in the lane to my right saying across cars, "nice exhaust."
#59
Instructor
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I just recently got a hold of the 1988 911 3.2 with stock engine, a straight cat bypass and then some janky aftermarket cheapo exhaust that I could NOT for the life of me figure out what brand it was. I think it was some "Dynomax" exhaust that made the car rumble and sound more like a muscle car. It compltely covered up the engine sounds. I was very disappointed with the sound and thought the 996 c4s PSE car I had sounded MUCH MUCH better. The 996 PSE had a nice little purr to it and small burbles.
That said, I'm hopeful that the crappy sound in my 3.2 had more to do with the boomy obnoxious cheapo muffler the PO had on it. It DID have nice kick back pops and crackles on throttle lift off which i liked but the overall sound was NOT Porsche like whatsoever.
It's currently at Pacific Power Motorports getting a stock cat fitted along with a Dansk Sport 70mm muffler. I'm hopeful this combo will give me that nice air cooled 911 sound everyone raves about!!!
That said, I'm hopeful that the crappy sound in my 3.2 had more to do with the boomy obnoxious cheapo muffler the PO had on it. It DID have nice kick back pops and crackles on throttle lift off which i liked but the overall sound was NOT Porsche like whatsoever.
It's currently at Pacific Power Motorports getting a stock cat fitted along with a Dansk Sport 70mm muffler. I'm hopeful this combo will give me that nice air cooled 911 sound everyone raves about!!!
#60
Instructor
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Yesterday, I took Olympus LS-10 sound recorder from work and taped it on the rear bumper and did some test recording.. Pretty good already. I have to do it again with more time and completely warm engine on some quiet back roads and take her to red line. ..and maybe also in tunnel.
The car is stock 911SC 1982 RoW (204hp) with Dansk pre-74 style stainless steel sport exhaust.
The car is stock 911SC 1982 RoW (204hp) with Dansk pre-74 style stainless steel sport exhaust.