Clone Engine Rules

Lee Johnson · Joined: 06 Oct 2005 Posts: 40

Wondering if these rules match those with WKA at all:

Engine:
Clone 6.5hp
Mikuni 22mm Carb
Billet Flywheel
Motor Must Maintain Stock Bore & Stroke!
Must use Clone OEM internal engine parts, with the exception that a Billet Connecting Rod is allowed.
No Flat Pistons, No Big Cams!
1.2 Ratio Rockers are legal
Roller Rockers are not legal
Valves must be stock size, but valve material is open
Valve Springs- 18 pound max
Pushrods- Stock, Chromoly or Chyro Treated
Milling of the Head is Legal
Drum Clutches Only
Exhaust is open
Gears are open
Spark Plug is Open
Fuel- Must be Gasoline, but otherwise is open.

Thanks.

Bernie Lacotta · Joined: 21 Mar 2006 Posts: 168

John Matthews · Posted: Fri Mar 11, 2011 7:22 am Post subject:

Another club making their own rules again????

There's already plenty of rules for clones right here.

http://karting.4cycle.com/forumdisplay.php?f=120

I think WKA and IKF are pretty much going with the builder prepared rules with a few "exceptions" Sad

IMHO, karting in the US will continue to stagnate until clubs realize it doesn't make sense to make their own engine rules. What you have for rules there is easily a $1000 motor from my shop if you want the most out of it, there's a lot of grey area there. What does "no big cams" mean? Just lift? Duration? Will there be a profile check?

Sometimes folks just sit down and try to figure out what would be fun for them to build. Sometimes they already have an engine that matches the rules they've written. In any case what they do is limit the number of people who can come run at their track, and force those who run there to buy different engines if they want to run elsewhere.

If you're gonna get that much work into the engine I'd recommend looking at the Super Box rules

http://karting.4cycle.com/showthread.php?t=215859

Guys are gonna be buying cams anyway, why not use a simple lift rule that allows for more power. Skip the Mikuni carb, the stock carb can be reamed out to do just as well without the expense. Most importantly, the guy who makes the rules won't have an unfair advantage (or perceived advantage) over everyone else....

JMHO,
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John Matthews
Heartbeat Power, LLC.

Bernie Lacotta · Joined: 21 Mar 2006 Posts: 168

John is 100% correct. I didn't mean to be so blunt. Best way to establish rules is to begin by purchasing a rule book from one of the major karting association. If you stay in line with established rules you allow your members to travel and other karters to race with you. Pretty simple concept. As John pointed out your " low cost " rules are so open it allows a lot of money to be spent on engines. And someone will. Please remember safety too, anything other than box stock with a clone should require a billet flywheel. It's nice to race for cheap but medical bills are astronomical.
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Lee Johnson · Joined: 06 Oct 2005 Posts: 40

So if I was to get an engine and follow the Pure Stock rules in WKA (711) TM-93, then I should be well under the rules for the club rules above?

I'd like to be able to send the driver interested in this to more than one track.

John Matthews · Posted: Fri Mar 11, 2011 9:30 am Post subject:

Yes, they should be able to run with this club but it probably won't matter anyway since an un-ported, stock compression engine with a stock carb won't have anywhere near the power of one built to the rules above. Your driver might still beat them by better driving and set-up but he or she should expect to be seriously underpowered.

Unfortunately this is a structural problem in karting and none of the national organizations in the US has the teeth (or any other body part) needed to fix it.

If your driver is brand new the best advice for them might be to buy their engine from the "builder" who wrote these rules in the first place. That's usually what these types of rules are intended to promote.

If there are other tracks within driving distance you might want to get on the phone with them and find out what their intentions are. Lots of stuff will be changing with clone rules this year, sprint tracks are about to find out what dirt oval racers have learned over the past few years.

Sorry,
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John Matthews
Heartbeat Power, LLC.

Karl Cleeton · Posted: Fri Mar 11, 2011 7:40 pm Post subject:

ron christian · Joined: 09 Mar 2009 Posts: 293

DELETE wrong threaad

Chris Hatch · Joined: 02 Mar 2004 Posts: 405

John is right, $1000 motor will be close. I see a lot of areas I will be playing with. Cam for sure. Stainless valves. Lots of head work. Flat top after market piston to go with the rod. Machined valves for max flow to go with the big carb. How about a PVL ignition?

I also run with a group that claims it wants to keep expense down by writing its own rules. It will cost $200-400 more than AKRA builder prepared. I have heard it said that when you hear a promoter say "keep costs down for the racer" to hold onto your wallet with both hands.