does a 2 stroke need backpressure?

Question

just wondering, im pretty sure it does but is it gonna hurt anything taking pipes off , like a 2stoke motor? probably would make it run lean or something right??

this is a banshee btw,just curious.

Answer 1

your expansion chamber exaust is an essential part of the intake/exaust timing on a 2 stroke the scavenging effect was first discovered by dkw in Germany in the30s. there was a lot of research & experimentation done by the after market exaust companys in the 70s when 2 strokes were popular & the hottest thing on the dragstrip & there were a lot of people selling after market pipes for them before epa regulations killed 2 strokes. maybe there are still some people selling pipes for them, check with dirt bike,snowmobile or ski doo water bike shops. you will never get it to run right without pipes . I knew a guy in the 70s that spent a lot of time trying to get his 3 cylinder h2 kawasaki to run with different length drag pipes, it sounded different than anything you ever heard but he could never match the high 11s he ran with 3 heavy stock pipes.

Answer 2

There are alot of tuned pipes bought on line. in case you verify your make and sort, in all probability come across a pipe on your bike, you may desire to ought to do somewhat diagnosis on the type engine you have on your bike some 2 stroke engines have been crossed between a number of makes of motorcycles. including immediately's scooters, some engines are equipped onto 7 and eight distinctive call sort motorcycles. The tuned pipe to a 2 stroke is in basic terms approximately like putting a rapid on a 4 stroke. the two stroke has in trouble-free terms 2 strokes to make compression and allow it out, however the cylinders are additionally made very in yet in any different case than the 4. Very open chambers to allow as plenty exhaust out quickly as available, then soak up as plenty gasoline/air in basic terms as speedy. In turn the tuned pipe holds the exhaust a chop up 2nd longer than with the inventory pipe. In essence including compression to the potential stroke. Like somebody else suggested, including a music pipe will reason you to ought to improve jetting. Your modern-day jetting will probally pass lean.

Answer 3

Yes, a 2 stroke engine needs the exhaust pipe for back pressure.
When the piston is moving up on the compression stroke, the exhaust port is still exposed (open).
Fresh, unburnt fuel escapes through the exhaust port.
The back pressure of the expansion chamber (exhasut pipe), pushes that unburnt fuel back into the combustion chamber.
Here's a simple video
http://www.angelfire.com/md/mikesbikes/page8.html

Answer 4

It will run without an exhaust but not at it's peak. The exhaust is there for back pressure and scavaging. Ever seen expansion chambers on high performance 2 stroke bikes and chain saws?

Answer 5

Actually it will run looking at the pistons in the exhaust ports. 2 stroke engines like almost no to negative pressure in the exhaust. Thus the expansion chamber exhaust was born. expanding gasses into a large chamber makes low pressure and helps pull the next exhaust pulse out. 2 Stoke engines with out exhaust are to lould even with cotton in your ears and helmet on.

Answer 6

No. The only result of removing the exhaust system would be excessive noise.