Muffler bypass w/valve
#1
Muffler bypass w/valve
Installed a muffler bypass for a friend on his '80 Porsche 911 (non turbo unfortunately). Thought you guys might like to check it out. It's got a switch on the dash so you can open/close it whenever you want.
Cut a hole in the pipe just after the cat/before the muffler, welded on short 2.5" tube and 3 bolt flange. Mounted valve then made new tip with another 3 bolt flange and some short bends. Cut off his old muffled tip and welded on matching tips. Now it looks like the old turbo 911's. I think it turned out pretty sweet.
Cut a hole in the pipe just after the cat/before the muffler, welded on short 2.5" tube and 3 bolt flange. Mounted valve then made new tip with another 3 bolt flange and some short bends. Cut off his old muffled tip and welded on matching tips. Now it looks like the old turbo 911's. I think it turned out pretty sweet.
#6
Re: Muffler bypass w/valve
Originally Posted by qsiguy
It's a header right up to the cat and would be a pain to plumb from. It's plenty loud like this. Next time I see him I'll take a video with him opening/closing it and I'll post.
At least you did it yourself.
#8
Re: Muffler bypass w/valve
Originally Posted by Dive_Miguel
Is that bypass valve aluminum? I doubt it, but it looks real shiny in the pic.
#9
Re: Muffler bypass w/valve
The body of it is aluminum, the actual flapper valve is steel. I never thought of a throttle body for one of these valves, thanks for the idea.
Performance wasn't the motivation for my friend wanting to do this. He just wanted it to look and sound cooler. He drives like a grandpa (which he is actually...not mine, lol). It was fun to do and was good experience to get under my belt. Always nice when you can use someone else's money and car for learning,
Performance wasn't the motivation for my friend wanting to do this. He just wanted it to look and sound cooler. He drives like a grandpa (which he is actually...not mine, lol). It was fun to do and was good experience to get under my belt. Always nice when you can use someone else's money and car for learning,
#10
Re: Muffler bypass w/valve
Originally Posted by qsiguy
Performance wasn't the motivation for my friend wanting to do this. He just wanted it to look and sound cooler.
def a "sound" mod
nice job, the tips look good