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YOUR RESEARCHMufflers - advice on modifying them myself
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Use 3.6 muffler over the 3.4
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Suggestion
inlcuding pipe sizes and positioning of weld, also the benefits to using a 3.6 muffler over the 3.4...
Leading evidence: 'Use 3.6 muffler over the 3.4' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use 3.6 muffler over the 3.4' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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911uk: 1 discussions
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I have a spare pair of mufflers (v. kindly donated by Big Bob) waiting to go on my car. I have always been keen for a bit more noise, and had previously thought about getting the Sommerfeld ones (same as Oettle), but quieter than the 105dB they advertise (they do a 102dB version if you ask nicely). Now I have a spare set, I figured doing the job myself if its easy (when I say myself, I mean watching my brother in law do it - he is a mechanic and has a welder).
I wondered if anyone has done it themselves, or had it done here in the UK and has any advice on materials, dimensions of bypass pipe etc? A very extensive search on here hasnt thrown anything up (there are lots of posts with the word muffler in them...) but I thought I would check.
Thanks, Josh
Morning,
Try searching the word 'hack' or 'by-pass'. Rennlist has LOADS of info and so does
www.6speedonline.com
inlcuding pipe sizes and positioning of weld, also the benefits to using a 3.6 muffler over the 3.4...
Also,
http://911uk.com/viewtopic.php?t=38682
one I started on same topic last week. Its certainly an interesting subject, given the £2,000+ price OPC officially charge for a PSE....!
Going from other threads the bypass pipe comes out the top where the circle 'dent' appears on the muffler then joins the outlet pipe. This by-passes one of the chambers or something :?
1) D'oh!
2) Pls forgive me as I did my search on here before I went on my 2wk holiday which I just got back from.
Thanks Stuart & Tedzwedz for the links etc. Looks like there is enough info out there to allow me to have a go.
(As far as I know)
Thats the valve that opens to let more noice out, when you push the button on the dash !
Where in the first pic I posted, that must be a bypass. Letting a little air through without going through the muffler giving a noise !
The Rennlist how to, as per the pipe to pipe version
http://forums.rennlist.com/rennforums/showthread.php?t=334918&referrerid=51262
Here's the 6speed how to
http://www.6speedonline.com/forums/996/127331-pse-hack-done.html
The pic below is the 3.6 style, same as PSE without the valve...
So at 105db, it is fair to say that you would be barred from taking it on most trackdays?
Would 103db version opens up the doors for some of the tracks?
It a big commitment of not be able to (or the option) to take it on track with the mod in place but on the otherhand would the sound make up for it.... :?:
See if you can find a second hand pair of mufflers and do the mod to them. There should be quite a few floating around from people doing the swap for aftermarket and PSE options. I would offer up mine but 2 people contacted me today seperately through PH, seems everyone is doing this...
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