04-21-2014, 06:24 PM
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#1
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Registered User
Join Date: Jun 2013
Location: Honolulu, HI
Posts: 135
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I bought an ebay exhaust from Beluga Racing (probably the same manufacturer as the Top Speed, different marketing) and have a question for you.
On a cold start, I get a popping noise for the first minute or so, kind of like popcorn popping. It's actually kind of annoying because it doesn't really sound like an aggressive gurgle, more of a cheap popping sound. Are you experiencing the same? I have about a few thousand miles (less than 1 year) on the exhaust now.
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Present:
'08 e90 335i, '00 986 S
Past:
'99.5 B5 A4 1.8tqms, '02 e46 m3 convertible
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04-21-2014, 07:46 PM
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#2
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Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
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Quote:
Originally Posted by Chard
I bought an ebay exhaust from Beluga Racing (probably the same manufacturer as the Top Speed, different marketing) and have a question for you.
On a cold start, I get a popping noise for the first minute or so, kind of like popcorn popping. It's actually kind of annoying because it doesn't really sound like an aggressive gurgle, more of a cheap popping sound. Are you experiencing the same? I have about a few thousand miles (less than 1 year) on the exhaust now.
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I have not experienced anything like that (yet).
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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04-22-2014, 06:50 AM
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#3
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Registered User
Join Date: Apr 2012
Location: Riverside, CA
Posts: 1,666
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Tom, thats great validation that the muffler does more than just sound nice.
Popcorn? I know if I rev up high that there is the gurgle/pop sounds as the revs come back down, or when down shifting agressively.
Maybe you have grass hoppers in your muffler that are getting cooked...thats strange and not something I have experienced with my TS either.
__________________
"It broke because it wants to be Upgraded  "
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
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04-22-2014, 01:29 PM
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#4
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Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
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Quote:
Originally Posted by jb92563
Tom, thats great validation that the muffler does more than just sound nice.
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Actually, I need to thank you since I decided that the TS Pro 1 was the right exhaust after you shared your experience with me when we talked Boxster's at the California Festival of Speed. 
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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04-22-2014, 06:58 AM
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#5
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Track rat
Join Date: Nov 2006
Location: Southern ID
Posts: 3,701
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Thanks for posting Tom,
The results are about what one might expect. A slight bump in hp at the highest revs for those long straights. Interesting seeing the sine wave in your A/F ratio from 5-6k with no corresponding fluctuation in hp. Not a lot of tuning options with 5.2 software in a spec class. A torque curve comparison might also be useful.
I need to do this on my car now.
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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04-22-2014, 07:22 AM
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#6
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Registered User
Join Date: Sep 2009
Location: The City
Posts: 1,084
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Quote:
Originally Posted by Chard
I bought an ebay exhaust from Beluga Racing (probably the same manufacturer as the Top Speed, different marketing) and have a question for you.
On a cold start, I get a popping noise for the first minute or so, kind of like popcorn popping. It's actually kind of annoying because it doesn't really sound like an aggressive gurgle, more of a cheap popping sound. Are you experiencing the same? I have about a few thousand miles (less than 1 year) on the exhaust now.
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If it happens when you are driving it is a backfire. (generally while decel in gear) My exhaust does this, granted I am sure much more so than yours. Unless you have catless headers and midpipes with a AM exhaust as well.
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04-22-2014, 08:33 AM
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#7
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Registered User
Join Date: May 2013
Location: Austin, TX
Posts: 121
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Quote:
Originally Posted by Chard
I bought an ebay exhaust from Beluga Racing (probably the same manufacturer as the Top Speed, different marketing) and have a question for you.
On a cold start, I get a popping noise for the first minute or so, kind of like popcorn popping. It's actually kind of annoying because it doesn't really sound like an aggressive gurgle, more of a cheap popping sound. Are you experiencing the same? I have about a few thousand miles (less than 1 year) on the exhaust now.
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This might be similar to what I get with the Top Speed. I've always thought it was an exhaust rattle until things heat up a tiny bit. Maybe 5-10 seconds if I give it any gas off idle. Does not sound like it's coming from the engine. Sounds kind of like popcorn, as you described. Doesn't do it at idle.
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04-22-2014, 09:07 AM
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#8
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Registered User
Join Date: Jun 2012
Location: Bedford, TX
Posts: 2,754
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Quote:
Originally Posted by Hayden
This might be similar to what I get with the Top Speed. I've always thought it was an exhaust rattle until things heat up a tiny bit. Maybe 5-10 seconds if I give it any gas off idle. Does not sound like it's coming from the engine. Sounds kind of like popcorn, as you described. Doesn't do it at idle.
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I don't get anything like that at start up with my TS. I do get the popping at deceleration which I love hearing 
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2001 Boxster S Lapis Blue
TS Cat Bypass Pipes and exhaust
iPad Mini Dash Install
DEPO Tail Lights
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Lil Red
2009 Porsche Cayman 2.9L
2001 Boxster S
Hybrid Mode
