What size..............
Thread Starter
Joined: Sep 2002
Posts: 183
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From: shitteyville, FL
What size..............
I m interested in getting a magnaflow ( if u dont like magnaflow then dont reply) for my 95 gs-r. I definately dont want it to be loud and obnoxious sounding. Just mellow, and deep when I get on it. I plan to get some 00' ITR cams and a skunk 2 IM in the near future. What size piping should I get to insure it makes power and sounds good. 2.25 or 2.5? Can anyone specify which magnaflow to purchase that will meet these requirements? By the way I already have read the 2 pages returned by the search engine with nothing being specific regarding future mods. Thanks for your time. 
[Modified by 95GS-Racin, 8:17 PM 12/26/2002]
[Modified by 95GS-Racin, 8:17 PM 12/26/2002]
Thread Starter
Joined: Sep 2002
Posts: 183
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From: shitteyville, FL
Re: What size.............. (porsche997)
My cat was clogged so I gutted it. If I get the muffler will I also have to buy a resonator to insure the exhaust note doesnt get buzzy or load and obnoxious? I shouldnt have gutted the cat I know, but I dont have tons of money.
Joined: Sep 2002
Posts: 903
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From: Gainesville and Sarasota, FL
Re: What size.............. (95GS-Racin)
2.25 seems to be the way to flow. A majority of racers use 2.25 on the b18c ... Too much loss of backpressure on the 2.5 I love the design on those Magnaflows too.. Good Choice Bro.. You Better angle it to the right too!!
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Joined: Nov 2001
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From: ...you can kill anyone.
Re: What size.............. (SlowAssAccord)
Care to clarify on being an *******?
A quick search uncovered this thread. Here is an excerpt:
Nope, you never want backpressure.
That is a myth dereived from people putting on to large exhaust pipes and seeing a loss of power. They figure, "Oh, well since I have zero backpressure with my huge exhaust and have lost power down low, I must need some backpressure to have good low end"
In reality, its because of exhaust velocity and flow quantity. If the pipe is too large for how much exhaust you are generating, the pulses are not going to be big enough to maintain proper exhaust velocity.
A properly sized exhaust will have the right diamater for the pluse sizes, this will cause the pulses to line up properly and help pull each other out creating adequate velocity. A pipe that is to large, the pulses will not stay in order, and instead bounce around causing slow exit and it can even cause exhaust gases to linger.
-StyleTEG
That is a myth dereived from people putting on to large exhaust pipes and seeing a loss of power. They figure, "Oh, well since I have zero backpressure with my huge exhaust and have lost power down low, I must need some backpressure to have good low end"
In reality, its because of exhaust velocity and flow quantity. If the pipe is too large for how much exhaust you are generating, the pulses are not going to be big enough to maintain proper exhaust velocity.
A properly sized exhaust will have the right diamater for the pluse sizes, this will cause the pulses to line up properly and help pull each other out creating adequate velocity. A pipe that is to large, the pulses will not stay in order, and instead bounce around causing slow exit and it can even cause exhaust gases to linger.
-StyleTEG
edit: fixed links
[Modified by punzak, 1:43 AM 12/30/2002]
Joined: Sep 2002
Posts: 903
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From: Gainesville and Sarasota, FL
Re: What size.............. (95GS-Racin)
Well.. a 2.5 would allow the gases to linger. Backpressure was the wrong word to use.. how inadequate of me. GS-Racin doesnt have a hella performance in his engine.. so right now, he should stick with the 2.25..
Honda-Tech Member
Joined: Dec 2001
Posts: 5,418
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From: Gresham, Oregon, USA
Re: What size.............. (SlowAssAccord)
My friend "Cheddabob" piped his GSR/EG with 2.5" straight back (no muffler) off his JDM ITR header... Only costed $300 Works fine for him...
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