SuzukiHayabusa.org

TECHNICAL => ALL MOTOR TALK => Topic started by: DarkFalcon on August 31, 2003, 07:55:00 AM

Title: Crankcase Windage Windows
Post by: DarkFalcon on August 31, 2003, 07:55:00 AM
One of the major motor modifications introduced in the new 1000 is crankcase windage windows, a concept described and illustrated in the accompanying link. Is this a modification that can be done after the fact without harming the structures?

http://mototuneusa.com/the_need_for_speed.htm (http://mototuneusa.com/the_need_for_speed.htm)
Title: Crankcase Windage Windows
Post by: Gixx1300R on August 31, 2003, 08:57:00 AM
GSXR1000 cases arent made like the Busa. On the 1000 the pistons cannot be pulled through the bottom so you cant slide the piston through to remove the block. The bottom of the cylinders are strengthen. That is why the windows are needed.

On the Busa block you can knotch the lower section of te
he cylinder walls between 1-2 and 3-4 cylinders. This gives about 3 to 4 horsepower.
Title: Crankcase Windage Windows
Post by: Redline on August 31, 2003, 09:24:00 PM
Will it effect the nickasil coating (peeling) on the cylinders or is it best to do before sending cylider out to be bored?
Title: Crankcase Windage Windows
Post by: dakinebusa on August 31, 2003, 11:33:00 PM
Anybody wonder why zuki went this way instead of the pair/sucker mod to reduce the amount of air in the case?

Methinks its the oil pressure problem in a wet sump motor.  Not enough suction head for the pump.
Title: Crankcase Windage Windows
Post by: DarkFalcon on September 01, 2003, 09:04:00 AM
I believe it has less to do with evacuating the crankcase and more to do with exploiting the windage of adjoining cylinders in different phases of the four cycle process.
Title: Crankcase Windage Windows
Post by: dragzooks@indy on September 01, 2003, 03:00:00 PM
quote:
On the Busa block you can knotch the lower section of teh cyclinder walls between 1-2 and 3-4 cylinders. This gives about 3 to 4 horsepower.
 
please elaborate on this if you would
i like finding cheap 3-4 hp   (http://images/smiles/icon_biggrin.gif)
Title: Crankcase Windage Windows
Post by: DarkFalcon on September 01, 2003, 04:31:00 PM
(http://mototuneusa.com/FBSuperbikeCylinders.jpg)
Title: Crankcase Windage Windows
Post by: Big Blue on September 08, 2003, 10:38:00 AM
Has anyone done the notching of the cylinder, and is there any negative feedback on this mod. Is this something that people are having local machine shops do or is there a recommended place?
Title: Crankcase Windage Windows
Post by: Steve A on September 08, 2003, 01:38:00 PM
Chevy put bigger "windows" in the LS1/LS6 engines, basically it just lets the air displaced by a piston on the downstroke move more easily - less pumping loss - to a cylinder with piston on the upstroke.
Title: Crankcase Windage Windows
Post by: AssAbuser on September 09, 2003, 01:33:00 AM
How much do you notch it?