|
|
Post by AtariGuy on Dec 12, 2017 8:12:38 GMT -5
Just a few questions on reeds plus any other thoughts and opinions welcomed.
First, is there a preference between carbon fiber and fiberglass reeds (and why)? Second, what's the difference in thickness (do they enhance performance bands or is it for durability/longevity)? And third, a very brief google search sent me to another forum, some of their setups, they back their fg/cf reeds with their modified stock metal reeds. What does this accomplish and what do those modified stock reed (backers) look like?
Bonus, whats your choice setup on reeds?
|
|
|
|
Post by 190mech on Dec 12, 2017 8:45:19 GMT -5
An extremely broad subject!Books can be written about it..In short,use the thinnest reed possible,too thin will flutter at high revs,too stiff will not respond quick enough.Latest race tech is a thin reed with a 'rev plate' spaced slightly out from the reed.Rev plate is a stiffer reed material about 1/3 height of the reed.Stuffers are important too as well as carb angle..Hundreds of hours of dyno runs are the only way to find the best,high end computer simulators will help a lot also; vannik.co.za/EngMod2T.htmNo simple answer here!! |
|
|
|
Post by jackrides on Dec 12, 2017 14:31:56 GMT -5
I worked with some early Boysen fiberglass reeds w/ aluminum cages retrofitted to a piston port engine. Cages had 90 degree edges which ate the reed edges pretty fast. Polishing the edges to a small radius extended the life a lot, but didn't cure it. A soft coating on the cage and/or stronger reeds would cure the problem. Reeds allow for more radical port timing and can have additional trench ports added, even holes on the intake skirt of the piston (not too close to the bottom). All of which can add a Lot of power and a livable power band.
|
|
|
|
Post by AtariGuy on Dec 13, 2017 18:13:41 GMT -5
Still curious though, fiberglass or carbon fiber? Is CF worth an 8 dollar upcharge (based on partsforscooters prices of stock replacement fiberglass and carbon fiber reeds). I know my reeds are old - and worn out. I know i need to get rid of the crap metal reeds before i blow a crank, just curious which direction to go with it.
|
|
|
|
Post by 190mech on Dec 13, 2017 20:37:55 GMT -5
|
|
|
|
Post by benji on Dec 14, 2017 0:10:48 GMT -5
Good reeds are very important. I'd suggest getting a decent set of reeds, I'm saving up for a v-force reed block for my bugeye zuma myself, currently rocking a boyesen rad valve on my prebug.
|
|
|
|
Post by aeroxbud on Dec 14, 2017 7:50:59 GMT -5
The carbon reeds should be more durable. They are also ment to been stiffer so you get less flutter at high rpm.
Would you notice the difference on a scooter? If you brought good quality fiberglass Probably not unless it was a high end build.
|
|
