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#1 keithstef

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Posted 09 September 2004 - 09:35 AM

Very interesting info on head modifications!



http://www.popsci.co...,679464,00.html


Maybe the next head kit modification?

Maybe Cudney or Warga can try the design and dyno with results... ?



In short, the article shows how this exbike racer started fooling with motors.

He added groves to the head of several motors. The picture is better than my description... But he ground ~1/8-1/4" groves from the spark plug to the edge of the cylinder. Creates lots of turbulance to better mix the air and fuel.
He seat of the pants test showed lest fuel consumption, wider power curve, and a able to lower the idle and still run and perform well.

Just wanted to throw this out....
'08 800R Gade X
  • Hygear Trail Pro Package
  • Boss Seat
  • 1.5" 136" Intense
  • C&A Razors
  • Bergstrom Skegs - 6" Triple
  • DJ Clutch Kit
  • BJ Secondary Brace
  • RS Tunnel Braces

#2 keithstef

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Posted 09 September 2004 - 09:51 AM

Another link
http://racingarticle..._racing-31.html
'08 800R Gade X
  • Hygear Trail Pro Package
  • Boss Seat
  • 1.5" 136" Intense
  • C&A Razors
  • Bergstrom Skegs - 6" Triple
  • DJ Clutch Kit
  • BJ Secondary Brace
  • RS Tunnel Braces

#3 keithstef

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Posted 10 September 2004 - 05:25 PM

Just a thought!
'08 800R Gade X
  • Hygear Trail Pro Package
  • Boss Seat
  • 1.5" 136" Intense
  • C&A Razors
  • Bergstrom Skegs - 6" Triple
  • DJ Clutch Kit
  • BJ Secondary Brace
  • RS Tunnel Braces

#4

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Posted 11 September 2004 - 12:55 AM

Very interesting article and idea. I hope this becomes reality.

Innovation and creativity is what breeds better performance and economy. We all could benefit from this...

#5 On the Pipe

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Posted 11 September 2004 - 07:59 AM

If I remember correctly that idea has been around for awhile. Back in around 1993 when I was racing grass, I remember a head for Sea Doo's with a swirl design cut into it. I can't remeber if we ever tried it on or race sleds or not.
(To many beers ago). But I believe this is not a new concept.

#6 Cudney Racing

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Posted 11 September 2004 - 04:24 PM

Yes this has been around for quite some time now and it has the same gains as a turboed crankshaft in a two stoke. ---------- "0"

#7

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Posted 11 September 2004 - 04:46 PM

Nothing new, like mentioned there was aftermarket pwc head with the same thing. Bud tested with them on his yamaha and saw nothing but another place for carbon to build up and more sharp edges to get hot and preignite.