Been out doing some street tuning tonight, and would like some help reading my plugs..

84mm b18c1
eagle rods
supertech pistons
pte6765 billet .82ar
p/p endyne head p72
fic 1680 injectors
dual dw301 pumps
ngk iridium bkr8eix 0.28 gap

#1 plug


#2plug


#3plug


#4plug



WOT, plx and hondata were reading 11.5 @ 15psi.
5psi-10psi was about 12.5.
part throttle,was about 13.5 in vacuum.
idle is @ 14.2

 

take a wire brush and gently clean the groundstraps, you need to see the discolouration of the metal, not the debries on it.

other then that they look good at first glance. correct heatgrade seeing the discolouration of the threads.

now if you could look at the fuel ring you'd know more but since you have a wideband i would'nt be too concerned with that.

 

looks good wat type of fuel ur running if pump gas u need to run a little more richer in cyl 123 the plugs need to look like cyl4 a lil darker

 

Toom much run time on those plugs to truely tell. Plus, you need to look deep on the porcelin (sp?) to check for detonation....

 

you cant tell much other than the driveability is a little on the fat side. #1 seems to be leaner than the rest, could be your intake design. thats really not the bet way to read the plugs though. you really want to put a fresh set in and do a full pull. after you let off kill the ignition and coast to a stop then pull the plugs and read them. having a wideband is the best way for global fuel changes but if you want to do individual cylinder trims reading the plugs is the best. get your self a little jewelers scope (some have little lights on them) so you can look down in at the fuel ring and any detonation will stick out like a sore thumb.

 

Thanks for the feedback.. Running 93oct. I did notice that 1,2,3 are a little leaner than 4.. Still learning the whole reading plug thing.. I'll try to take it out again tonight with a fresh set of plugs, do a full pull and shut it down to see how they look..

 

Fresh set, full pull and shut it down at top without letting it idle.