02-20-2009, 12:32 AM
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CC Member
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Join Date: Jun 2006
Location: Newcastle, Warners Bay,
NSW
Cobra Make, Engine: RMC . 393 Dart alloy block Stroked 351 alloy heads ..all the goodies plus a pre oiler. al
Posts: 1,495
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Quote:
Originally Posted by Plums
Inside the 4 inch sidepipes I have a 3.5 inch cat and a 2.5 inch hotdog. I tacked some perforated steel to the outlet of the the hotdog to hold my stuffing in. Inside it is a length (about a foot) of 1 7/8 tube with a cap welded on the end. The whole thing is stuffed with about 20 stainless pot scourers.
Basically, the exhaust gas has to squeeze through the equivalent of a 1/2 inch pipe.... then go through the perforated steel. This is the same on both sides of course.
Even though it's badly bunged up, it still goes ok...
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Very good ! Mine was registered on gas to beat the new emission laws and I had it muffled down so much that I had to attach a vacuum cleaner onto the exhaust to get it to start. That only happened about 4 times but it was very funny. Start it, it fires, Jump out and disconnect the vacuum cleaner before it blew up. I couldn't run the engine too hard .too much backpressure
Last edited by Rob. Smith; 02-20-2009 at 12:41 AM..
Reason: add more info
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