i had a bit of crap on my pistons i scraped off, lots of black build up. i dont nkow if its from too much fuel or burning oil or what. what do you guys think??

 

Sounds like carbon build up to me.. One thing i have noticed is some of the "cheaper" gas stations tend to produce more carbon build up than others. If it's running super rich then it will have more carbon build up than if it was where it should be. Oil consumption can also increase the build up

 

thanks

 

i have noticed that our engines do build up alot of junk on the crowns.

 

most of the time the gas comes from the same refineries. cost of gas does not matter.

 

Oil blow by from the pcv

 

i'd say you are running rich...did you ever get a tune after your headers, ory, gmmg install...plus the typical oil from the pcv will compound that problem...i wouldn't say you'd have to worry too much about it though

 

yeah i tuned it, recently i put the wrong injector size in and it was so rich it wouldnt run, changed the plugs and everything. even with the damn ls6 valley swap im gettin little bits of oil sucked in. but i dont think its really much at all

 

The additives that are added at the pump at each station are said to make a difference with build up though. who knows, just what i have heard