Piston Wash

[rocks rev]

What do you think?

 

[Danzick]

far as i know you should have wash marks on your intake sides of the piston.

 

[PTE800]

piston wash

What do you think?

Looks lean.............
Even the wrist pins look like they've taken some extreme heat.

 

[HPJUNKIE]

What wash?

 

[m8magicandmystery]

would be fine for an etec...lol..

 

[Danzick]

is that an exhaust side burn down i see? or is that just me.

 

[rocks rev]

This piston didn't burn down, but my PTO side lost the locator pin and the ring spun.

 

[sledsrock]

Flip that piston over and snap another pic of the underside of the dome.

 

[rocks rev]

Here you go.

 

[sledsrock]

Here you go.

That's what I thought, based on the first pics of the top, and now the underneath....that piston has been hot, wrist pin, top of dome verify that. Up the jetting! No wash and a hot spot in the middle of the dome, lucky it didn't burn down.

 

[bustamove]

im doing a rebuild, and im not sure about my jetting. how long till the piston gets a good wash? how many hrs?

 

[mastertech]

Lol.. There is NO piston wash on those pictures..

Look at this link and the pictures. Should give you a good idea of what to look for. Looks to me you need at least 4 jets size bigger ( to start)
http://www.cpcracing.com/site/256083/page/196309

 

[sonic]

looks just like mine.i got mine hot.my rist pins were even hard to come out.

 

[rocks rev]

I don't know if it's running hot or if got a leaking crank seal thats leaning it out. Ya I know theres no wash, I should have had a different title(What do you think of these pistons?) I'am jetted 420 PTO 400 MAG with Rkt Head, stock pipe skinz can.

 

[JedInUtah]

Rocky- with that setup and those jets, you should be rich if anything. Definitely not that lean. You have air coming in somewhere. Especially for 3 motors in 1000 miles.

 

[bustamove]

Lol.. There is NO piston wash on those pictures..

Look at this link and the pictures. Should give you a good idea of what to look for. Looks to me you need at least 4 jets size bigger ( to start)
http://www.cpcracing.com/site/256083/page/196309

GREAT READ

 

[CBX]

Is this an 800 HO 800 Ptek or an 800R?

 

[doolaris]

My stock '08 everest has looked like that from new and still does at 2K mi???

 

[JedInUtah]

Is this an 800 HO 800 Ptek or an 800R?

800 HO

 

[PTE800]

What compression, elevation and fuel are you running ???? Just seems like both cylinders are very similar in appearance for a crank seal. I chased similar issues only to find that my compression was to high for the fuel and elevation I had. You can jet richer but don't be surprised if you still don't get good wash. If the compression is to high for a given fuel the fuel burns too fast and causes the same looking wash as you have. When you start running a head such as a RKT where the squish clearances are more correct (.045 ish) it seems to be an issue more. The squish velocities speed up and problem is more pronounced.
I backed mine down to 12.5:1 for 1000 ft on premium....