Fred, Long Island

Looking to bypass the final, tub shaped, muffler on my C2. Any ideas? Has anyone done it and will I be waking up the neighbors if I do it?
Thanks.

Andy Roe

I've fitted a Secondary Bypass pipe to mine & love it! Nice deep sound & a few pops & burps here & there! It is quite a bit louder though! Easily reversible if you decide you don't like it.

Fred, Long Island

Need a source for such a unit also. Thanks

johnfm

try <a href="http://www.type-911.co.uk" target="_blank">www.type-911.co.uk</a>

no affiliation, but I think Joey Bagadonuts used them & was happy.

OR Joey may no longer be using his bypass- Joey??

Andy Roe

That's where I got my G-Pipe from too. Last I heard Joey was still using his & liked it better than when he had a Primary bypass pipe fitted.

Jeff Curtis

I like the Secondary Bypass much better, after hearing several different 964s with it on it.

I bought a modified Primary Muffler from Fabspeed...it is a Porsche factory Primary Muffler with their tip nicely welded onto it...so effectively, I've bypassed the bypass!! :roalmao:

I believe Joe offers these units for $250 or so, figured it was a "no brainer" to try one and I love it!!

I also use the "Euro-Premuffler" from Fabspeed, it's a nice piece, not just straight-thru, kinda looks like a catalytic and has a resonator section built into it, a baffle of sort and a VERY nicely designed port for your O2 sensor.

I get LOTS of compliments on the deep sound. The car sounds great at idle and under load...when she really winds up it sounds NASTY! ...good nasty, that is. <img border="0" title="" alt="[Wink]" src="wink.gif" />

Overall, I wouldn't say it was abnoxcious whatsoever, and the neighbors like it A LOT more than my 225HP 911SC with B&B headers/muffler on it...they absolutely HATED that car, as I hated the exhaust...sent it back SEVEN times to B&B to fix cracking problems and to have them make different attempts to quiet it down.

Would you believe the last time I sent the muffler in they sent it back with a catalytic converter tip and a bill for $300?? <img border="0" alt="[grrrrrrr]" title="" src="graemlins/cussing.gif" />

joey bagadonuts

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Jeff Curtis:
<strong>I believe Joe offers these units for $250 or so</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">That's Joe Fabiani at Fabspeed Jeff's referring to--not me!

I did buy the Type 911 secondary pipe and love it. Yes, it's a little louder but not at all obnoxious. I used to have the cup pipe (primary bypass) and it growled and sputtered a bit more. This one gives a nice, muffled growl and pops a little when you blip the throttle or upshift quickly. Again, nothing too obnoxious or vulgar.

In terms of performance, my G-Tech results indicate that it is at least as fast as the stock setup ... maybe just a tad quicker. <img border="0" title="" alt="[Wink]" src="wink.gif" />

It's a very easy DIY job. If memory serves, there are two bolts holding up the secondary muffler just behind the rear hub. You have to reach behind the rotor but it's very doable without special tools.
Enjoy! <img border="0" alt="[cheers]" title="" src="graemlins/beerchug.gif" />

Cupcar

B&B Fabrication, Inc. the makers of the B&B mufflers tested the flow of the catalytic converter, primary and secondary mufflers on a flow bench. They found the following, listed in their literature:

Catalytic converter: 442 cfm (cubic feet per minute of air)
Primary (rear) muffler: 396 cfm
Secondary (side) muffler: 462 cfm

This means the most restrictive of the 3 elements in the system is the primary muffler.

I weighed the mufflers and found the following:

Primary muffler: 23.5 pounds
Primary bypass pipe(factory Cup unit):7.75 Pounds
Net saving removing primary: 15.75 pounds

Secondary muffler: 23.25 pounds
Secondary bypass (factory Cup unit): 3.75 pounds
Net saving removing secondary: 19.5 pounds

So you save a little more weight removing the secondary, but the system flow is most restricted (~17%) by the primary so perhaps the most power (if any) is to be gained by removing the primary.

The center of gravity of the weight saved in removing the primary is about a foot farther back in the car, perhaps producing a greater polar moment effect of the weight decrease, so I compromised by removing the primary.

I didn't pay any attention to the sound change. <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />

scupper

I too am running a secondary muffler bypass pipe - took about 20 minutes to install.

Purchased it from Pelican Parts (www.pelicanparts.com )
- manufactured by Dansk - I forget the price, but as I recall, well less than $200. Just give Pelican a call and they can order it for you. It does not appear (at least then) in their on-line catalog.

Good throaty sound, and coupled with drilled airbox, very mean sounding at 4k plus rpm! Love it!

Chuck
93 C2

PC2

I got mine from Evolution Motorsports for $229 (not affiliated). It was a 20 minute DIY. My 6 yrs old son and I love the growl, but my 3.5 yrs old daughter thinks it's too loud and scary (she seats in the right rear seat where it's the loudest)!

Fred, Long Island

Thanks all. Unbelievable price disparity for the unit from the supply houses. Seems we owners are sometimes victimized for owning the marque.

scupper

I think Fred sent me a private message saying Pelican is charging $350!! Holy cow. I tried going back to find my receipt and unfortunately, cannot. I KNOW I did not pay that much. I am almost positive that it was closer to $200 and I think less. Good Grief, it's just a simple curved piece of tubing. $350 would be a real ripoff!

For that money, I would purchase a used secondary muffler on Ebay and have a local shop gut the thing.

Chuck
93 C2

johnfm

The 'G-pipe' is £89 ($170 inc tax) from type 911.

$350 must be for the 'dove' rip-off price.

joey bagadonuts

Yes, the price for this simple pipe is all over the place and that's why I went with the UK supplier. To clarify, there is no tax or VAT but the financial institution which issued your credit card may hit you with a 2% conversion fee. Shipping by airmail costs maybe $15 and their service is excellent--took approx five business days. Total damage should be less than $170.

SimonH

I'm pretty confused by all this! I have a '90 C2 which is completely standard. I would love to hear more of my expensive flat six, particularly when over 4k rpm. I'm more interested in the quality of the noise rather than just annoying boom.
What would the collective recommend I do first? These G-pipes seem pretty cheap. Is that a good way to go first? Or cat replacement? Bearing in mind I haven't even drilled the airbox.

Cheers
Simon