Rt 66 new blowdown rules

John Horn 33 · Posted: Wed Mar 13, 2013 5:11 pm Post subject: Rt 66 new blowdown rules

So I have to wonder with specs on minimum blowdown, are we now allowed to grind transfer ports to meet the specs?

mark coats · Joined: 07 Oct 2002 Posts: 500

John,
We are using WKA engine Tech with the blowdown rule added.
No grinding is allowed.
Thank you,
Mark

John Horn 33 · Posted: Wed Mar 13, 2013 6:21 pm Post subject:

So then why the new rule on blowdown? The rule book clearly states that no grinding is allowed, so if it is not ground how is the cylinder not legal? I have personally never seen a blowdown near 380 anyway

Kent Laukaitis · Posted: Thu Mar 14, 2013 5:56 am Post subject: blowdown

John,

The main reason for the rule is to stop anyone from altering the ports via EDM or other methods. Talking with other engine builders we agreed that 380 was a good number on the low side that would include 99.9% of all engines we have ever seen from the factory. So long story short, you cannot grind or use any other method to alter the port from the factory. Hope that helps.

Kent Laukaitis

Greg Wright · Posted: Thu Mar 14, 2013 6:45 am Post subject:

It appears that this rule will spread through out the sport, New Castle's KRA series has adopted the same rule.
_________________
Greg Wright
Rapid Racing Inc.
NKN Columnist & Host "Karting News Live"

I AM INDY!!

"When in doubt, gas it. It won't help but it ends the suspense."

Walt Gifford · Posted: Thu Mar 14, 2013 10:07 am Post subject:

I'd like to see how many engines have .381 blow down after the race lol.

Gif Cool

_________________
FAA certified jet engine and aircraft technician
Nicholson Speedway class champion 2001
Yamaha KT100 Service Center
40 years karting experience

Mike Burris · Posted: Thu Mar 14, 2013 1:03 pm Post subject:

It never ceases to amaze at how much energy can be put into a simple problem for the last 30 years and still be a problem! Karting has had classes in the past that have controlled engines that allows ports to be brought to spec and there was never any of the mass meetings of the minds on how to control it. I remember when some rocket science tech rule said it was legal to grind one exhaust port but not the other or grind at the junction of the liner but not the control edge. The EDM thing is a big scare tactic and blown way out of proportion so why not just remove the finish call out on the ports (keep the same dimensions) and be done with it? Rolling Eyes

read rule 11.8 , pretty simple, huh? http://www.burrisnationalspeedwayseries.com/v03/rulebook/v/BNSS_Rules_Section11.pdf

Jason Ewers · Posted: Thu Mar 14, 2013 4:03 pm Post subject: Blow

patrick slattery · Posted: Mon Mar 18, 2013 8:33 am Post subject:

Mike, if you tried to run that cylinder at IKF or WKA rule track you would be tossed out, am I correct.

Pat

Walt Gifford · Posted: Mon Mar 18, 2013 8:53 am Post subject:

Mike, is there a minimum blow down in your rules? They are EDMing the transfers higher to a .380 blow down if I'm not mistaken.