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Need for back pressure? 200 1982

posted by  richink on  Mon Aug 2 03:42 CST 2004
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last visit: Wed Dec 22 04:40 CST 2010
[RELATED]

Been to Speedy Muffler lately???

THERE IS NO SUCH THING AS BACKPRESSURE!!!!!!!!!!!!!!

It's a falacy created by muffler shops so that they can rip you off for whatever they feel like when you have to get your exhaust fixed at 3pm on a Saturday 150 miles from home. I've heard it all. Without it you valves will burn out. Your fuel economy will go in the toilet. You'll blow that rear muffler off without it. BAH!!!

All ranting aside, your camshaft releasing the exhaust valves after the expulsion of burnt gases to close them is all they need to shut. Muffler shops and grease monkeys who want to rip you off will try to explain that there is this magical reverse flow that seals them shut. It doesn't exist.

For the past 280,000 km between a pair of 240's I have run the same exhaust. High flow catalytic plus a single solitary OEM 240 Turbo muffler in the back. Straight 2 1/4 tubing all the way and in between. No resonators, no special flex tubes, just simple tubing bent to shape and welded in place. Gives a little bit of a snort on the high end as well...
--
Happy Bricking!!! - Richard - '87 245 DL , '82 242 GLT - Half a million km between them!!!






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