New exhust manifold on 50cc

[steve09]

hi i currently drive a bog standard piaggio typhoon and im doing a plant mechanics and engneering and engine tuning course at a college in norfolk i come back next weekend for good but this weekend (i come home every weeked) i were messing about with some pipes and what not and ive done a 3 week bench fitting course ssoo i was wondering, if i made a new manifold that split off the exhust into 2 differnt pipes then had a pipe ethier side would it effect the engine in any real bad waty i dont want any more perfomace or anything just something differnt and i wana mess about with my new found skills hehe, oh and im not in the least bit a ped boi lol,,
i know most of you will think WHY but u know its something to do hehe
cheers
steve
P.S
As ive a fair amount of time left till i can get a bigger bike i was also thinking of buying a cheap Ar or DT and maybe messing about on that soo if it dose go bang i still have a relable bike

[mchaggis]

You really, really need to get the diameters and lengths of the expansion chambers and pipes right. Doing that wrong will make your engine turn into runny poo. I've not got much idea about two-stroke tuning, though just in general, the exhaust gas dynamics are not very simple things. The main thing I can think of is getting the lengths right, so that exhaust scavenging still works properly. (Assuming the exhaust scavenging works in the same way on a 2t engine.)
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Discovering the delights of Hammerite and a 3/4" brush.

[steve09]

is see well i think ill buy a secoond bike hehe you know to mess about on becuase this sounds alot more completacted than i expected lol we dont do 2stroke tuning till 2secoind year hehe
cheers for advice

[mchaggis]

Well, I imagine you could bodge something by following the same basic rules for keeping the flow rate the same and the basic length the same, and not have too many problems. Two pipes, the same length, but each has half the area (basically keep the same volume of pipe). If it were after the expansion chamber it would probably be easier as that could stay the same.

See the attached picture. I'm sure there are plenty of people who know far more about this than I do.
____________________
I must not be a troll...
Mmmm, Guinness
Discovering the delights of Hammerite and a 3/4" brush.

[stinkwheel]

Put a smaller diameter stinger on the end of each. Make it over-long then cut it back until it carburates properly?
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[steve09]

lol that would look mad but if its easyer i could have say a dt50 and the exspanstion chamber then it T-ing off one round the other side and 2 pipes that could work hehe,, well ill buy the bike and let you know how i get on just got to wait till nxt pay day now december 23rd lol need all money i can get at the moment for xmas

[stinkwheel]

[binge]

Theres a speedfight like that on the intanet, But I cant work out where the expansion chamber is...
https://www.beepworld2.de/memberdateien/members20/malossifighter/monster_speedy.jpg

Ben...
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- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -

[steve09]

that looks quite kool thanks
and is tht nitrous down the side of that scooter :-S

[binge]

Yeh, its got a NOS bottle on it. AND its a woman owner. ...

but i cant figure out how them exhausts work because there dosent seem to be an expansion chambre, just a pair of TS50 end cans...

<|Ben|>
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -

[mchaggis]

From the looks of it, after a bit of lightening the picture, the exhaust on the left hand side of the bike snakes around the the front of the rear shock, and goes to join the right hand exhaust a little further forward. One might assume that the expansion chamber is on the right hand side as perhaps normal.
____________________
I must not be a troll...
Mmmm, Guinness
Discovering the delights of Hammerite and a 3/4" brush.

[binge]

The second end can on the left is more than likley just for show, I bet less that 20% of the fumes exit through that 1...
Also Ive seen a pipe on PM tuning where the expansion chamber is dead short and fat, and it starts really close to the manifold, then goes on to a straight through end can, so maybe its somthing like that just with an extra end can...

<|Ben|>
____________________
- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -