9sectruck

iTrader: (9)

just putting this out to see every body's opinion
I hope these links work
BBC 489, this is on e85 11.2-11.8 28degs of timing at 17psi 3 14gal hour nozzles pure meth
I finally figured out how to put pics up, I think

http://i788.photobucket.com/albums/y...k/kikky024.jpg
http://i788.photobucket.com/albums/y...k/kikky023.jpg
http://i788.photobucket.com/albums/y...k/kikky025.jpg
http://i788.photobucket.com/albums/y...k/plugs011.jpg
http://i788.photobucket.com/albums/y...k/plugs009.jpg
http://i788.photobucket.com/albums/y...k/plugs007.jpg
http://i788.photobucket.com/albums/y...k/plugs008.jpg
http://i788.photobucket.com/albums/y...k/plugs015.jpg

9sectruck

iTrader: (9)

damn those links dont work
try these!! the pistons are the last pics
http://i788.photobucket.com/albums/y...k/plugs007.jpg
http://i788.photobucket.com/albums/y...k/plugs008.jpg
http://i788.photobucket.com/albums/y...k/plugs009.jpg
http://i788.photobucket.com/albums/y...k/plugs015.jpg
http://i788.photobucket.com/albums/y...k/plugs014.jpg
http://i788.photobucket.com/albums/y...k/plugs012.jpg
http://i788.photobucket.com/albums/y...k/plugs011.jpg
http://i788.photobucket.com/albums/y...k/kikky024.jpg
http://i788.photobucket.com/albums/y...k/kikky023.jpg
http://i788.photobucket.com/albums/y...k/kikky025.jpg

OUTLAWZ RACING

iTrader: (9)

Did u do the conversion to read e 85 with the afr guage? If it was 11.8 on a standard afr guage it went lean, from the pics it looks lean on top from the pistons. Plugs cant really tell the story un less you pulled them hot.

98Z28CobraKiller

iTrader: (17)

agreed. Those ring lands look melted, not just busted. Also, the fuel ring is down inside the plug. You have to cut the threads off the plug in order for us to be able to see it in a picture. And as Outlaw stated, the plugs have to be pulled right after the pass. Shut down, No idling.

9sectruck

iTrader: (9)

my wide band is set to read gas lambo
the plugs where drove on

98Z28CobraKiller

iTrader: (17)

How did the rest of the piston tops look?

Johnv

I would think that with E85 and 3 x 14gal/hr meth nozels,
11.5 AFR is way lean !!

9sectruck

iTrader: (9)

their was one more piston that was just starting to deform
but the other 5 look like they had 10 passes on them
just some color on the tops nothing look bad at all, if all 8 look like the 5 good ones I would not be scared to put them in another engine

9sectruck

iTrader: (9)

here is a pic of a good piston the 5 good ones look just like
http://i788.photobucket.com/albums/y...pistons001.jpg
http://i788.photobucket.com/albums/y...pistons002.jpg

hellbents10

iTrader: (10)

11.5 is not bad on gas scale, the amount of ignition advance you are running depends on a few other factors though. compression, cam, cylinder heads, and the inlet air temp (which should be OK with the amount of meth and ethanol). Did you verify that there was 85 eth in the batch of E85 you put in the car? If it was down to 70% or so then you would not have the octane you need, although you would be richer on the AFR gauge.

looks like more of a distribution or injector problem though.

98Z28CobraKiller

iTrader: (17)

How do you verify the % of ethanol?

HUNTER02SS

iTrader: (24)

Also, you need to get rid of those projected tip spark plugs. Boosted engines are supposed to run non-projected tip plugs. TR6 plugs are projected, but usually don't run over 700hp. Anything more go to non-projected.
If you like the autolite plugs, use the AR3934 plugs. These are non-projected.
EDIT: I also think 28deg. of timimng is alot for 17 psi. I would back it down to 20deg. as well.

Chevy406

iTrader: (12)

Just how deep are the valve notches? While they didn't cause the problem, it certainly made for a weak point in the piston for when it went lean.

When you want to post pictures, add the image tags before and after the link:
[img]picture link goes here[/img]

9sectruck

iTrader: (9)

the plugs that i was running where autolite ar94s
are these the right strap

Chevy406

iTrader: (12)

By the way, which two cylinders had the melted pistons?

HUNTER02SS

iTrader: (24)

No, use the AR3934., if you like the Autolite Racing plugs. The tip of the plug is recessed into the plug. They are a heat range 8 or 9?