Reed valve on the cheap

john_the_great · #61 (**permalink**) 10-28-2009, 10:13 AM

hey pitchfork do you know the part number for the echo reed valve?

scott83 · #62 (**permalink**) 10-28-2009, 09:35 PM

Anyone used the pocketbike reed assembly ? $6 thats on the cheap in my book.

aero07 · #63 (**permalink**) 10-29-2009, 11:24 AM

I'm with you John. I would like to know how the echo reed valve worked too.

john_the_great · #64 (**permalink**) 10-29-2009, 07:18 PM

homemade reed valve cheap

here's a link to pitchforks reed valve setup

scott83 · #65 (**permalink**) 10-30-2009, 03:31 AM

Got my PB reed assembly in today looks like theyll work.... aluminum bar stock on the way ...think its gonna be sweet

noco · #66 (**permalink**) 10-30-2009, 04:02 AM

Quote:

Originally Posted by scott83

Here is a good link I found several years ago on etching youre own reeds for use in pulsejet engines....the process is really simple...it aint rocket science ...but close..LOL.

www.aardvark.co.nz/pjet/makevalves1.pdf

And the page its from with good info on the design/theory of the assembly.

Factors Affecting Pulsejet Valve Life

it rocket surgury!!!

but anyway...how were the results...did this blow the crank seals out???sounds like a great idea if those crank seals can handle it and the motor can handle the higher compression...

scott83 · #67 (**permalink**) 10-30-2009, 09:31 AM

I didnt do the etching process for this ....I spent like 10$ on a pocket bike reed assembly. Haven't had a chance to do any R&D yet .... still waiting on aluminum barstock... to make a decent "cheap" reed block adapter.

scott83 · #68 (**permalink**) 10-31-2009, 01:12 PM

Didnt think about blowing crank seals...must be why Hodaka had you do this mod when installing reeds on thier bike www.strictlyhodaka.com/images/reed0006.jpg looks like it would prevent over pressure in the crankcase since intake and transfer would be equalizing until the piston moved past both of them. www.strictlyhodaka.com/images/reed0004.jpg Thanks for the insight think ill be doing this cylinder mod before I install my reed assembly.

noco · #69 (**permalink**) 11-01-2009, 01:47 AM

Quote:

Originally Posted by scott83

Didnt think about blowing crank seals...must be why Hodaka had you do this mod when installing reeds on thier bike www.strictlyhodaka.com/images/reed0006.jpg looks like it would prevent over pressure in the crankcase since intake and transfer would be equalizing until the piston moved past both of them. www.strictlyhodaka.com/images/reed0004.jpg Thanks for the insight think ill be doing this cylinder mod before I install my reed assembly.

that would definately reduse some of the crankcase overpressuring that i was concerned with...good research...but is this nessassary???how has other peoples been holding up???

oh by the way nice reed valves...how big are they????

scott83 · #70 (**permalink**) 11-01-2009, 09:39 AM

Dont know...thats what I was wondering Ive not heard anyones stories on here I did see a thread somewhere on here that showed Pipelyne (I think thats how its spelled) had made some reed cages assemblies....but nothing on how well they work and they were like $100....... too rich for my blood....Im thinking $20 to $30 here and there is reasonable.....if its a hundred here and a hundred there I'll buy a Different Motor.
It would be good to know if the the cylinder mod is even required. Ill probably try without doing it and see... and if the seals go replace them when I do the cylinder mod.