Landracing Forum Home
October 22, 2018, 12:24:05 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News:
BACK TO LANDRACING.COM HOMEPAGE
 
   Home   Help Search Calendar Login Register  


(Note: Donations are not tax deductible)







Live Audio Streaming and Archives of Past Events
Next Live Event: TBD
Pages: 1 [2]   Go Down
  Print  
Author Topic: Engine Size  (Read 3436 times)
0 Members and 1 Guest are viewing this topic.
Blue
Sr. Member
****
Offline Offline

Age: 57
Location: Layton, UT
Posts: 414


Don't guess, TEST!




Ignore
« Reply #15 on: January 15, 2011, 01:38:59 PM »

Can't use the pump on a two stroke Nutz. Uncovers the ports and measures the world.
Back when I raced a two-stroke (when dinosaurs walked the earth), tech would pull a spark plug and use a dial indicator to measure stroke.  If someone protested bore, they pulled the head.  Swept volume is swept volume.  What the heck was the question??? huh
Logged

"Doing the same thing as everyone else insures the same result", Shawn Fischer
"Extraordinary ideas do not come from ordinary thinking", Dan Bond
"Don't compromise, optimize", Eric Ahlstrom
dw230
Hero Member
*****
Offline Offline

Location: So Cal & Impound, UT
Posts: 3077





Ignore
« Reply #16 on: January 15, 2011, 06:57:25 PM »

The statement was made about using the air pump in impound. I answered, in my limited experience, that we cannot use the air pump because as the piston runs through the stroke cycle ports in the cylinder are uncovered and will leak air to the crankcase. I raced two stroke karts and this is how I remember the engines. Anyway, if air is leaked through the ports in the cylinder you do not get an accurate measurement of cylinder volumn.

A two stroke would be measured the same as a standard engine. Our dip stick for stroke, and the spread finger tool for the bore. Of course the piston would have to be either high enough or low enough in the bore so that the fingers would not fall into the ports. Been done before. The standard math would be used to determine the displacement.

DW
Logged

White Goose Bar - Where LSR is a lifestyle
Alcohol - because no good story starts with a salad.
Pages: 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!


Google visited last this page June 12, 2018, 06:12:34 AM