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plug chop distance?


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Hey guys.

Recently rebuilt my whole engine and have probably 5-10 hours on it. Just putts in around in the field getting on it now and then plugs look good after about an hour. Decided to try some plug chops. First attempt I got to 4th wide open, held throttle and killed it and coasted to a stop. Warmed bike up on older plugs first*. Pulled plugs and they looked brand new. My field is about a qtr mile, is that long enough or do i need to find somewhere longer?

This is my setup:

-Stock engine bored .030 over

-Stock head and stroke

-+4 timing

-FmF fatties/PC 2

-Boyeson Power Reeds

-Uni pods w/ outerwears

-Stock carbs

-27.5 pilot

-320 mains

-needle one clip below middle(rich side)

-airscrew 1.5 turns out.

-Tors deleted and synced with sync tool

 

Elavation is 900' and 65° right now.

Any advice would be nice. Airscrew is mainly for idle mixture correct?

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if you look down towards the bottom of the plug and you see no color change the last thing id do is find a longer straight away! i agree 4th gear pulls are kinda short, but it should be long enough to see some color change! i always kill it in 6th wot!

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when i do a wot run i cant see the color unless i cut the threads but i am pretty blind

most of my buddies never cut the threads off when they do there "plug chop"(they are cheap fucks haha) i have no problem seeing the smoke ring with the thread on, but i cut threads to get a better visual!! there is no question, the proper way is to cut the threads to best read the plugs.. but if you have good eye sight you should be able to see the smoke ring with the threads on!

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Hey guys.

Recently rebuilt my whole engine and have probably 5-10 hours on it. Just putts in around in the field getting on it now and then plugs look good after about an hour. Decided to try some plug chops. First attempt I got to 4th wide open, held throttle and killed it and coasted to a stop. Warmed bike up on older plugs first*. Pulled plugs and they looked brand new. My field is about a qtr mile, is that long enough or do i need to find somewhere longer?

This is my setup:

-Stock engine bored .030 over

-Stock head and stroke

-+4 timing

-FmF fatties/PC 2

-Boyeson Power Reeds

-Uni pods w/ outerwears

-Stock carbs

-27.5 pilot

-320 mains

-needle one clip below middle(rich side)

-airscrew 1.5 turns out.

-Tors deleted and synced with sync tool

 

Elavation is 900' and 65° right now.

Any advice would be nice. Airscrew is mainly for idle mixture correct?

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