BannedCR500Riders.com

good post coley. aparently billybob doesnt understand


http://www.aerospaceweb.org/question/ae ... 0215.shtml


im wondering how a tunnell with dimples or rough surface differs in flow from a smooth wall. wouldnt the boundary layer be thicker on a smooth wall, thus creating less actual flow through the center section ?

They dont show the bottom of the valve, there's more flow getting effected by the profile of the bottom than what you'd think. We have several different designs, and one we have custom machined on our ti valves.

I think it would be cool to try dimpling the exhaust on a dyno mule motor to see if there is a change.

Thanks for that 100, not like I didn't have enough crap in the cue...... LOL

Its in flippin' French.... but watch the whole thing. It really worked!!!!

He is the English version.. I love this show,

http://dsc.discovery.com/videos/mythbus ... imyth.html

Thats awesome! i'm going next door with my 20 lb sledge and tell the neighbor i'm gonna improve his gas mileage by 11% with the golf ball dimple method!

A golf ball flies threw the air a car is a rectangle type shape that drives down the road and you could say pushes threw the air they both have high&low presure areas and depending on what shape they are they create drag!!

For instance what would create more drag a UPS truck or a Formula 1 car?
Would dimpling make the formula car faster probably not because of it's stream lines would it work on the ups truck probably not because of it's big box shape

Does the SR71 blackbird have dimples anywhere?

The dimples work great on the car the problem is alot of people are not going to buy cars with dimples all over it and sales would be down although with today's economy and fuel prices you never know!!!

Hey Clyde maybe you could ask glen where the drag is on the exh port since he has a flow bench and then you could figure where to put the dimples in the port!!!

putting all his faith in that flow bench was glens down fall

[[/quote]

I'm confused ass to why he would put a peanut M&M size hole on the front of the and 8 more where they dont need to be. Wiesco does recomend drilling like 3 holes with a #50 drill bit i think right in line with the exhaust bridge. and a well known bike mechanic here in town that a 500 fan said the same thing. And i think its even in the paper work you that comes with the piston. Isnt the idea behind it is to cool and add a little lube on the bridge?

I did it with a cast piston and havnt seen any adverse effects from it.

peanut hole was most likely for fuel to hit the wristpin area. or it could of been just another intake port, but that small of hole would be useless. if i recall the 8 holes are inline with the studs. maybe he thought it would prevent sieze. extra oil on the walls in a nutshell. difficult to say for certain what the old geiser was thinking.

actually theirs 16 holes i believe. not 8

the peanut hole is a port, the holes on the side keep lube on the skirt when you slap the throttle shut at a million rpm

seems oval would be more effective. takes more time to cut though.

rectangle is where its at

thats what i meant. rectangle with radius ends

You cant do this with a cordless drill and a uni-bit , with the piston sitting in your lap while you watch " Judge Judy" on the 13" Zeinth T.V with rabbit ears sitting across the room out there in Palmdale..........