Exhaust systems
and don't cause OSO arguments 
12-30-2015 | 02:28 PM
#32
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From: On A Dirt Floor
KE's beat them all at 500hp - many tested on a stock HP500. As they should.
2" x 34" primaries. 4" collector.
I'm confident they'd kick ass against the others up thru N/A 650hp anyways.
Last edited by SB; 12-30-2015 at 03:28 PM.
12-30-2015 | 02:34 PM
#33
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From: On A Dirt Floor
I'm sorry. They are now Diamond Marine's Thunder N Lightning Exhaust
http://www.diamondperformanceparts.c...cat=282&page=1
http://www.diamondperformanceparts.c...cat=282&page=1
12-30-2015 | 02:35 PM
#34
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From: SF Bay Area
While a blower engine may not benefit from a tuned exhaust, it's processing a lot more air and fuel and still needs a good exhaust system and will benefit just like any other engine. The manifold, while not tuned, may not be as much of a restriction on the smaller engine as it would on the larger blower engine and that restriction will kill power on the blower engine.
Exhaust tips can be an overlooked item. The stock Corsa mufflers on my 272 were killing my 502.
12-30-2015 | 02:37 PM
#35
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From: On A Dirt Floor
edit in: their old spiral style they haven't made for years.
Last edited by SB; 12-30-2015 at 03:27 PM.
12-30-2015 | 03:31 PM
#38
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Got it. I'm using the 4" diameter 'performance' 4 or 5 ring open style. They knock about 6dB off the sound, make a better sound, and have not been restrictive in the least bit. The CP inserts on the other hand squashed about 500 rpm off the big end.
12-30-2015 | 03:34 PM
#39
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From: Chicago
Another thing I was wondering about.....
My "dry" tails have six 3/8" water outlets right at the tip. I was considering welding those shut and welding in bungs near the ends of the tails and dumping the water that way.
Is there any advantage to either way of expelling the water? Can the water migrate back up the tailpipes even when it's introduced at the very tips of the pipes?
My "dry" tails have six 3/8" water outlets right at the tip. I was considering welding those shut and welding in bungs near the ends of the tails and dumping the water that way.
Is there any advantage to either way of expelling the water? Can the water migrate back up the tailpipes even when it's introduced at the very tips of the pipes?
I do dump overboard from inside the boat but have a hole inside the tail at the end to keep the mufflers from burning up.
Last edited by ICDEDPPL; 12-30-2015 at 03:41 PM.
