alperx

can you help reading my spark plug ?

here is the photo I took of the plug from cylinder no:1

Turbo-LS

iTrader: (4)

WAY TOO HOT and lots of detonation.

Is it tuned? What fuel ? how much boost ? what power level ?

If thats Cyl 1 then im sure Cyl 4 is worse unless that is just on cyl 1 and not the others.

alperx

it was tuned. after tuning - the turbo is converted to a water-cooled center and rebuilt.(it was leaking oil)
fuel is 95 octane.
10 psi
turbo is garrett t3/t04B - 57 trim

the problem was : I didn't know that there was a voltage problem. The car's voltage was dropping to 11v and the AFR was around 14-15 at full boost. I solved the voltage problem, so should I change the plugs and see whats going on ? or should I make it retuned ?

Muckman

iTrader: (2)

Yes retune. Voltage would affect your injector battery offset and thus your AFR. Do you have a wideband to verify AFR with?

alperx

I had an Innovate giving E8 sometimes - I had another one - AEM - it works without problems now.

SiRCiviC94

looks like when i tried adding nitrous with just the fuel regulator cranked up! 13+:1 mixture. an hour on the dyno will sort out problem i dont see why its always a retune (400-1000$)! good stuff to know though

Turbo-LS

iTrader: (4)

What is your a/f ratio now that you have corrected the voltage problem ?

alperx

as far as I could check from the last log before taking the plug photo, it is between 12.6 and 13.1 when boosted..

edit : it wasn't like this before, I don't know if it is because of turbo or anything else..

Spawne32

iTrader: (3)

your definitely running a tad bit on the lean side, the picture isnt clear but i dont see any clearly defined signs of detonation on the ceramic portion. Heat range appears to be ok from the coloring.

AbitAvenger

Definitely on the lean side I would get it retuned asap..