UK Karting - Notice Board (General Karting) : Re: IanT

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Re: IanT
Posted by 'iant' on 28 May 2013 @ 19:56

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iantJoined: October 2001
Total Posts: 3
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A few extracts from various websites :-

"A plug chop is getting the engine to the test RPM as fast as possible and MAINTAINING that RPM for at least 1 mile with out changing the throttle position AND shutting down the engine as fast as SAFELY possible."

"To perform or ‘do’ a plug chop is easy. To do it with safety (to yourself and others) takes a little more care and thought. The simple act of chopping the motor dead, at full bore (or whatever throttle opening you choose) is accomplished by first checking that the engine does stop when the throttle is shut (of course this should always be the case) then fit a new or freshly cleaned plug of the appropriate grade
to the previously warmed up engine. Finally the engine can be brought up to racing temperature by driving it hard for a couple of laps, then on a full bore part of the circuit you simply shut the throttle and whip in the clutch both at the same instant so that the engine stops and the bike is free to coast to rest."

"If you’re going to do a plug chop remember to install a new, properly gapped plug and make sure your machine is up to operating temps before making any attempt. After you’ve brought the bike up to operating temp jump on and find an open stretch that will lead you back to your tools. Run it through the gears until you stick it in 4th (or 5th). Start at the very bottom of the gear and then wick it WFO. Hold it until the top of the gear and then some (just a little) and then hit the kill switch. When you hit the kill switch remember to close the throttle at the same time and coast back to your tools. Remove the plug and inspect. You'll need a 5 to 10 power spark plug magnifier lite to see the base of the pocelain."

.............

So after you've done the plug chop you then have various options of how you read the results of the plug chop - you can cut the plug threads as you suggest, you can remove the whole ceramic by cutting the swage off the sleeve OR you can look into the base of the electrode with an iulluminated magnifier.

The inspection/reading of the plug comes after you have done the plug chop.

Message Thread:

Spark plug colour? by 'tinnokart' (26 May 2013 @ 20:47)

Re: Spark plug colour? by 'tinnokart' (27 May 2013 @ 14:32)

Re: Spark plug colour? by 'John' (27 May 2013 @ 14:46)

Re: Spark plug colour? by 'tinnokart' (27 May 2013 @ 16:29)

Re: Spark plug colour? by 'raceinstructor' (27 May 2013 @ 16:57)

Re: Spark plug colour? by 'tinnokart' (27 May 2013 @ 17:09)

Re: Spark plug colour? by 'PaulMRotax' (27 May 2013 @ 18:13)

Re: Spark plug colour? by 'John' (27 May 2013 @ 19:27)

Re: Spark plug colour? by 'tinnokart' (27 May 2013 @ 22:00)

Re: Spark plug colour? by 'John' (27 May 2013 @ 22:08)

Re: Spark plug colour? by 'iant' (27 May 2013 @ 22:43)

IanT by 'tinnokart' (27 May 2013 @ 23:17)

Re: IanT by 'iant' << You are here!

Re: IanT by 'tinnokart' (29 May 2013 @ 7:56)

Re: IanT by 'iant' (29 May 2013 @ 20:50)

Re: IanT by 'tinnokart' (29 May 2013 @ 21:33)

Re: IanT by 'BrianP' (30 May 2013 @ 10:15)

Thanks Brian (nt) by 'iant' (30 May 2013 @ 23:11)

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