Black R

What would happen if..... you ran 8-12 psi + 10.6:1 compression and ngk heat range 5 plugs? Would this explain the broken ringlands?

stock itr
vortech supercharger
fmu + 310cc injectors
vafc
no compression on cyl #3

Car was purchased in this condition. I'm just rebuilding it.....

I found that the pistons on cyl #2 and #3 had cracked ringlands and were held together by the piston rings.....

Thoughts?

norcalcrx

Those are pretty hot plugs for fi, but it could be any number of things that caused the ringlands to go. Poor tune with the vafc. To hot of plugs. To much timing.

racinskittle

pistons could melt, ringlands crack, sleeve could even crack.

DefiantGSR

Throw on a 100 shot while you're at it.

cpforyou

Get a set or two of NGK BKR7E-11 Spark Plugs.

Good for boost!

m R g S r

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cpforyou &raquo;</TD></TR><TR><TD CLASS="quote">Get a set or two of NGK BKR7E-11 Spark Plugs.

Good for boost!</TD></TR></TABLE>
I think he needs pistons first. . .

Muckman

iTrader: (2)

How do the valves look? Detonation can eat holes through valves.