Piston port vs reed valves

Clubin

Well-Known Member
Messages
1,330
Location
Manitoba
What is the difference between the 2 is one better than the other. I am thinking about getting a larger displacement engine, what should I be looking for.
 

todd217

Well-Known Member
Messages
215
Location
rantoul,il
piston port uses the piston to start and stop the intake process. while a reed has the piston and cylinder modified so the intake is always open in the engine. the intake is now controlled by the reed allowing more fuel/air in. check out http://www.hostilehobby.com/ they have 27.2 and 30.5 bbk already ported for a reed for 75 bucks.
 

Timmahh

Bajastafarian Madnes
PLUS member
Messages
3,376
Location
Michigan
theres not alot of info here, but if you head to the sister site of www.hpibajaforum.com and do a search, you ll find a Shitload of posts on them.

Todd is correct in his statement. the bennefits of a reed are typically more obtainable and Useable RPM Range, More Torque when compared to the same cc motor in a pp variety, and best of all, faster, smoother spool up. the one down side is a reed setup will likely use the gas faster, so you wont get as long of run time out of a tank of fuel, but its worth the trade off if you ask me.
 
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