2.5" or 3" exhaust
Im running a high comp b20v, plan on getting a street sweeper header from sigma six racing, what diameter exhaust size is better to run with? 2.5" all the way or 3" all the way? If end up doing 3" will probably use WS2 80mm muffler or 2.5" with magnaflow. any thoughts?
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Re: 2.5" or 3" exhaust
Originally Posted by hetap
(Post 45919776)
Im running a high comp b20v, plan on getting a street sweeper header from sigma six racing, what diameter exhaust size is better to run with? 2.5" all the way or 3" all the way? If end up doing 3" will probably use WS2 80mm muffler or 2.5" with magnaflow. any thoughts?
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Re: 2.5" or 3" exhaust
theres no point of doing 3" with a 2.5 axle back... ill say max for a b series do a 2.75
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Re: 2.5" or 3" exhaust
that sounds like a mean setup...go 3 inch all the way...
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Re: 2.5" or 3" exhaust
here's my set up:
B20v setup gsr head stage 5 port b20b block 84.5 mm bore weisco 13:1 pistons eagle rods gsr crank acl race bearings skunk2 internals skunk2 pro 3 cams itr tb omni 70mm tb competition stage 5 clutch and ultra light flywheel aem fuel rail and fpr RC 750injectors Gsr tranny |
Re: 2.5" or 3" exhaust
3"!
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Re: 2.5" or 3" exhaust
2.25 with a cutout at header....nice streetability and you can open it up anytime
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Re: 2.5" or 3" exhaust
3''
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Re: 2.5" or 3" exhaust
3 inch.
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Re: 2.5" or 3" exhaust
Nothing less than 3" just did full 3" with my stock B20V and love it, lost a little down low but nothing terrible.
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Re: 2.5" or 3" exhaust
3"
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Re: 2.5" or 3" exhaust
I found this article that you should check out about exhaust.
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/article-exhaust-system-basics-2970428/ |
Re: 2.5" or 3" exhaust
WHY 2.5'' or 3'' exhaust OR 2,75'' or 3'' exhaust ?
3'' in my stock b18 feels good. |
Re: 2.5" or 3" exhaust
You def need to go 3". The less obstructions (bends, flex pipes, mufflers, etc) the faster the exhaust gas can exit. Get some 304SS 3" and roll with it
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Re: 2.5" or 3" exhaust
2.5" all motor all the way baby!!
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Re: 2.5" or 3" exhaust
Originally Posted by Da9GSR54321
(Post 45952145)
2.5" all motor all the way baby!!
Air in and air out. Think about that |
Re: 2.5" or 3" exhaust
2.5'' why ?
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Re: 2.5" or 3" exhaust
I do wonder though why do several race teams and such use smaller piping? TODA Racing exhaust is clearly labeled off road use only and their intent is to make the most out of a race motor. A Spoon N1 is a race exhaust and wasn't intended for street use yet the outlet is only 2.5". I understand tracks have sound regulations but there has to be something more to it.
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Re: 2.5" or 3" exhaust
Originally Posted by q16racer
(Post 45953431)
For what might as well be a race motor?
Air in and air out. Think about that but dont get me wrong, i've seen ppl throw on 3" set ups on their all motor and put down some decent numbers. if ur taking EVERYTHING into calucation though like weight, efficiency, etc then i would rec 2.5" for a solid na. sidenote: is there any heavy block work being done? |
Re: 2.5" or 3" exhaust
The weight between a 3'' and 2.5'' system is minimal. 3-4 lbs isn't going to slow you down.
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Re: 2.5" or 3" exhaust
thanks all for the input going 3"
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