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wanna see what lean and to much timing does to a piston...

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Old 09-23-2009, 10:22 PM
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Default wanna see what lean and to much timing does to a piston...
http://www.yellowbullet.com/forum/sh...97#post2933997

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Old 09-23-2009, 10:32 PM
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damn... take it that would be your piston??
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Old 09-23-2009, 10:33 PM
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looks like a damn styrofoam plate you left in the microwave too long!
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Old 09-23-2009, 11:14 PM
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Originally Posted by SLawson86
damn... take it that would be your piston??
yep.

its 3 pistons.....good thing we have a few extras.
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Old 09-23-2009, 11:20 PM
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lmao, mine wasn't that bad... it just took out the very edge of piston #7
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Old 09-23-2009, 11:33 PM
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that will most definately not buff out.lol
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Old 09-23-2009, 11:48 PM
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So....was it fastest before it let go? LOL J/K

That is some crazy ****. Any sign those 3 holes were lean before teardown?
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Old 09-24-2009, 12:20 AM
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lean for sure...what happened? how were the plugs?
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Old 09-24-2009, 12:25 AM
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so how much were you spraying? How much timing was actually pulled on that setup?
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Old 09-24-2009, 07:31 AM
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Old 09-24-2009, 07:39 AM
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Originally Posted by jmill96Z
So....was it fastest before it let go? LOL J/K

That is some crazy ****. Any sign those 3 holes were lean before teardown?
It never let go, but it was on its way.
We knew #2 was hurt, we compression tested it Sat. morning and it was 130 ... We pulled some timing from that hole and ran it all day long.

#2 was the reason we tore it down but the other 2 being hurt was not much of a surprise. #8 didnt look to bad other than the ring land being pushed up.

Like I said on YB, we have been RACING this motor all year so I aint mad at it.
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Old 09-24-2009, 07:42 AM
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How much was that being sprayed with? Atleast the rod still looks good.
Plug?
timing?
fuel?
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Old 09-24-2009, 07:42 AM
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how did the rod bearings look

we're cracking mine open next weekend...I'm almost scared to see what we'll find
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Old 09-24-2009, 08:03 AM
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Originally Posted by Fireball
how did the rod bearings look

we're cracking mine open next weekend...I'm almost scared to see what we'll find
We use coated bearings and they looked fine, the coating is not even off of them.
I was thinking the same thing you were before we pulled them off though.
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Old 09-24-2009, 08:04 AM
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Originally Posted by Z284U2TRY
How much was that being sprayed with? Atleast the rod still looks good.
Plug?
timing?
fuel?
450hp

Tr11
9*
165lbs. or so
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Old 09-24-2009, 08:42 AM
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WOW, thats pretty, lol. well atleast you got a good season out of her anywayz.

what kind of piston is that?
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Old 09-24-2009, 08:48 AM
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it will happen and as you said for a season of racing and fly'n like you are you can't be mad
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Old 09-24-2009, 09:11 AM
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Originally Posted by JAX04
WOW, thats pretty, lol. well atleast you got a good season out of her anywayz.

what kind of piston is that?
Looks like a weisco piston
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Old 09-24-2009, 09:59 AM
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I don't believe that was lean, or overtimed. It pushed the ring land up, then let oil in the chamber. I bet it was rich. Any plug pics from that tune-up?
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Old 09-24-2009, 11:22 AM
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rich is what usually gets the ring lands.


looks like the pistions took most of the pain, looks like the block may still be in ok shape and reusable with minimal clean up?
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