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Registered User
Join Date: Mar 1999
Location: Alta Loma, CA
Posts: 1,837
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Pretty crazy muffler (see pic)
Finished this one up tonight/today (its 2:15 am) The muffler setup was pretty cool. It is adjustable. Kinda like a GoKart exhaust. You can tune it for more or less bottom end torque by twisting the billet red knob. It opens and closes a valve. I forget who built this car, but I built a gearbox for it.
B |
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10-25-2002, 01:13 AM
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Registered User
Join Date: Jun 2002
Location: Boring, Oregon
Posts: 917
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When increasing torque are you increasing or decreasing back pressure? The guy that I bought my muffler from suggested a performance muffler for increased torque. Mine has the look of a Bursch although it isn't. This is interesting!
bruce
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Sit'n here Hav'n a beer. Punkin's gone (sniff) Gotta mow the Lawn... |
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10-25-2002, 05:28 AM
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Registered User
Join Date: Jan 2002
Location: Long Beach CA
Posts: 28,974
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Although you can change the torque by changing the backpressure, I believe he is changing the *tuned length* which optimizes the secondary waves.
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'00 Boxster and a '96 XJ6 Jag Past owner of 2 914's, 3 911's and one 356B. "Tig McStick" is on Facebook |
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10-25-2002, 06:26 AM
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Registered User
Join Date: Jun 2002
Location: Boring, Oregon
Posts: 917
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So torque is a product of long/short exhaust piping and high or low backpressure? I love science!
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Sit'n here Hav'n a beer. Punkin's gone (sniff) Gotta mow the Lawn... |
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10-25-2002, 06:55 AM
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Registered User
Join Date: Oct 2001
Location: Theodore, AL, USA
Posts: 216
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Cool.
Kind of like a KIPS valve on modern two stroke dirtbikes. The valve is controlled by RPM through a centrifugal actuator to widen and narrow the cylinder exhaust port. Karl P. |
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10-25-2002, 07:30 AM
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Registered User
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Power efects!!!!!! i love that adjustable muffler, have one on my dads 951 track car, great for streat and track. great muffling. like a glasspack open, and a nice stock muffler closed. !!!! never seen one on a 914 though, thanks brad
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"It'll fit?" See my V8 thread Pics of my car Hear it with Magnaflow mufflers and shorty headers Or just hear it with open headers  Hear it current, No ugly tips. louder Incar ax vid. 4-2-05 7-16-05 SCCA auto x Stockton. <---------New! |
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10-25-2002, 05:50 PM
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Registered User
Join Date: Mar 2002
Location: Washington, PA
Posts: 1,363
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If you look closely you can see the big nuts on that car.... ya know the ones holding the tranny on
 What a ride!
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AKA: Dr Evil on the 914World forum, need your tranny rebuilt, or want a "How to rebuild your transmission DVD" set? PM me. -74 914 with 74 2.7 CIS -74 VW Bus with modified 3.1 corvair engine and 3.0 CIS fuel injection system. -74 BMW R90 |
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10-26-2002, 10:53 AM
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1973 Porsche 914 2.0
