why two pipes?

geezer · 07-20-2011, 10:19 PM

so whats going on in the cylinder head that made the suzuki guys use a dual pipe? its nice to fool people who think its an paralel 2. but it doent make much sence.

blaine · 07-20-2011, 10:53 PM

Quote:

Originally Posted by geezer

so whats going on in the cylinder head that made the suzuki guys use a dual pipe? its nice to fool people who think its an paralel 2. but it doent make much sence.

Two exhaust valves,one pipe for each valve.Easier for the engine to breath.But I assume you already know that.
:tongue:

geezer · 07-20-2011, 11:20 PM

sure thats the easy answer. but this is the only bike i know of with anything like this set up. not to mention if this really helps the engine breath why cant it go up a hill faster than 45mph? :tongue: somehow i feel its purely a cosmetic thing

blaine · 07-20-2011, 11:49 PM

Quote:

Originally Posted by geezer

sure thats the easy answer. but this is the only bike i know of with anything like this set up. not to mention if this really helps the engine breath why cant it go up a hill faster than 45mph? :tongue: somehow i feel its purely a cosmetic thing

Yea,your probably right.You still have a issue.I never had any problems going up hill.I very rarely needed to down shift & I had 16t front sprocket.You still running lean?
:cool: :??:

Water Warrior 2 · 07-21-2011, 12:56 AM

2 exhuast pipes and separate valve ports may help the engine breath more freely. Also there is a possibility that the 2 pipes coming out straight from the head are better than a single central pipe that has to be configured to bypass the frame for clearance. Yeah, I'm just guessing again.

geezer · 07-21-2011, 07:28 AM

but it does look like its for clearing the frame. thats a good guess there. hey blain i was exageratin a bit. but on big hills yeah she drops speed like i tthrew out an anchor. still waiting on the jets i orederd. i a positive the two pipes flow better and also noticed where they come together one is in from of the other. so there could be some torque scavaging goingon. (exhaust pulses sucking eachother out)

**jonathan180iq** · 07-21-2011, 08:28 AM

Suzuki calims it aids in combustion, but who knows?

If you noticed, that same design is not used on the TU250. So if it really did anything, why not just slap the same thing on the newer, fuel injected bike?

Makes more sense to me to just have a single intake and exhaust port. A second dome would only increase turbulance if you ask me. Although, increasing turbulance in the head might boost torque under certain scenarios.... I don't know.

CMS · 07-21-2011, 11:28 AM

Check some of the Honda dirt bikes ,they have the two into one pipe also. Terry

geezer · 07-21-2011, 01:05 PM

jon waht your saying about the turbulance is correct. that might be another part of it, as well as the need to clear the frame. good discusion guys thanks for your thoughts

Water Warrior 2 · 07-21-2011, 04:58 PM

Duh, just remembered. 2 smaller valves will flow intake or exhuast mixtures more efficiently than a single larger valve. As for the TU 250 maybe the FI meters fuel well enough for better combustion and single valves are a cost saving factor in the manufacturing process.

07-20-2011, 10:19 PM	#1
geezer Senior Member Join Date: Mar 2011 Location: dahlonega GA Posts: 563	why two pipes? so whats going on in the cylinder head that made the suzuki guys use a dual pipe? its nice to fool people who think its an paralel 2. but it doent make much sence. __________________ 99 gz 250 and a currently dismantled fzr 1000 Login or Register to Remove Ads
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07-20-2011, 11:20 PM	#3
geezer Senior Member Join Date: Mar 2011 Location: dahlonega GA Posts: 563	Re: why two pipes? sure thats the easy answer. but this is the only bike i know of with anything like this set up. not to mention if this really helps the engine breath why cant it go up a hill faster than 45mph? :tongue: somehow i feel its purely a cosmetic thing __________________ 99 gz 250 and a currently dismantled fzr 1000 Login or Register to Remove Ads
	0

07-21-2011, 12:56 AM	#5
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Re: why two pipes? 2 exhuast pipes and separate valve ports may help the engine breath more freely. Also there is a possibility that the 2 pipes coming out straight from the head are better than a single central pipe that has to be configured to bypass the frame for clearance. Yeah, I'm just guessing again. Login or Register to Remove Ads
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07-21-2011, 07:28 AM	#6
geezer Senior Member Join Date: Mar 2011 Location: dahlonega GA Posts: 563	Re: why two pipes? but it does look like its for clearing the frame. thats a good guess there. hey blain i was exageratin a bit. but on big hills yeah she drops speed like i tthrew out an anchor. still waiting on the jets i orederd. i a positive the two pipes flow better and also noticed where they come together one is in from of the other. so there could be some torque scavaging goingon. (exhaust pulses sucking eachother out) __________________ 99 gz 250 and a currently dismantled fzr 1000
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07-21-2011, 08:28 AM	#7
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	Re: why two pipes? Suzuki calims it aids in combustion, but who knows? If you noticed, that same design is not used on the TU250. So if it really did anything, why not just slap the same thing on the newer, fuel injected bike? Makes more sense to me to just have a single intake and exhaust port. A second dome would only increase turbulance if you ask me. Although, increasing turbulance in the head might boost torque under certain scenarios.... I don't know.
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07-21-2011, 11:28 AM	#8
CMS Senior Member Join Date: Nov 2007 Location: Southern Ohio Posts: 146	Re: why two pipes? Check some of the Honda dirt bikes ,they have the two into one pipe also. Terry __________________ You can never have enough motocycles 2017 Yamaha R -3 White 2013 Suzuki GW250 Black FSSNOC # 4953
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07-21-2011, 01:05 PM	#9
geezer Senior Member Join Date: Mar 2011 Location: dahlonega GA Posts: 563	Re: why two pipes? jon waht your saying about the turbulance is correct. that might be another part of it, as well as the need to clear the frame. good discusion guys thanks for your thoughts __________________ 99 gz 250 and a currently dismantled fzr 1000
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07-21-2011, 04:58 PM	#10
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Re: why two pipes? Duh, just remembered. 2 smaller valves will flow intake or exhuast mixtures more efficiently than a single larger valve. As for the TU 250 maybe the FI meters fuel well enough for better combustion and single valves are a cost saving factor in the manufacturing process.
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