Single Dump vs. Dual Dump Downpipe
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Single Dump vs. Dual Dump Downpipe
I'm looking at these two Vishnu turbo back systems for my WRX. Is there a significant power or spool difference between the two? I've heard the dual dump(divorced wastegate) system is rather loud. I'd like something louder and more aggressive sounding then stock, but I don't want it to be annoying/obnoxious since I do have to travel the highway to work everyday. Are there any dyno comparisons out there? Any owners want to add their input? Thanks.
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Dual dump is always a better design. (Corky Bell agrees with me... ok I agree with him 
). In fact, the most efficient design is to have the wastegate dump to atmosphere and never return to the main exhaust... which is of course not CARB legal
jason
). In fact, the most efficient design is to have the wastegate dump to atmosphere and never return to the main exhaust... which is of course not CARB legal jason
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Car Info: 02 Impreza WRX sedan
Originally posted by ENess76
I'm looking at these two Vishnu turbo back systems for my WRX. Is there a significant power or spool difference between the two? I've heard the dual dump(divorced wastegate) system is rather loud.
I've heard a car with a complete Vishnu Signature Series turbo back exhaust (divorced wastegate pipe, high-flow cat in downpipe, 3" stainless) and it isn't that loud, IMO. There are a number of exhausts on the market that are louder but may not make as much power. No, I don't think anyone has a comparison dyno chart but Vishnu did extensive testing to come up with a no-holds barred street exhaust system. It's a little pricey, though, but what I would get if I had the bucks. The downpipe high-flow cat is optional but recommended to quiet things down to a nice level.
--
0==WW==0
"…axles of evil…" - george w. bush
I'm looking at these two Vishnu turbo back systems for my WRX. Is there a significant power or spool difference between the two? I've heard the dual dump(divorced wastegate) system is rather loud.
I've heard a car with a complete Vishnu Signature Series turbo back exhaust (divorced wastegate pipe, high-flow cat in downpipe, 3" stainless) and it isn't that loud, IMO. There are a number of exhausts on the market that are louder but may not make as much power. No, I don't think anyone has a comparison dyno chart but Vishnu did extensive testing to come up with a no-holds barred street exhaust system. It's a little pricey, though, but what I would get if I had the bucks. The downpipe high-flow cat is optional but recommended to quiet things down to a nice level.
--
0==WW==0
"…axles of evil…" - george w. bush
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