alopez84

UPDATE ON PG 3

After a good 6 months of a strong running car with no issues it was time for something to happen, just didnt want it to be this bad. Oh well i will come back bigger and better!

Now for the question, what do you think happend? Injector failure? The car was running fine without any issues before this happend. I pulled out the 880 injectors the day before to go with 1000's but one was bad so i put my orginal injectors back in which i had run for 6 months. Then on Race Day in qualifying the car went 10.43@ 141.84 and laid over right as i went through the traps.

Heres a vid of the run. Sorry for the end its short, the car let a small puff of white smoke out through the traps.
http://www.one-fab.com/Persona...1.wmv

I am 100% sure it wasnt the Tune so thats out of the Question.
Heres a link to when it was tuned.

https://honda-tech.com/zerothread?id=1302002












Modified by alopez84 at 3:47 AM 1/5/2006


Modified by alopez84 at 12:09 PM 1/5/2006


Modified by alopez84 at 12:10 PM 1/5/2006


Modified by alopez84 at 12:10 PM 1/5/2006

cstay

were your piston ring gaps ligned up?

lucidvtec

ouch

SteveoBA8

detonation

hondaguyef

EDIT: My "guess" below


Modified by hondaguyef at 8:47 PM 12/5/2005

RacerXI

Do any of the other sleeves look like that? "something" happened in that cylinder it seems if it's the only one that looks that way. stumped too...

SOHCD16y8

It doesnt look like your typical burning, it looks like it exploded or something from behind. This is a first for me.

RMS

burned it. too lean/lack of fuel for whatever reason. you said you just reinstalled the injectors... any chance the clip wasn't getting a good connection? you said one of the 1000s was bad... maybe it wasn't, but your injector driver or injector wiring was actually the culprit.

kdawgy2k1

yeah man sorry to say there was quite a bit of etonation goin on in there because you can see the pitting marks from heat on the outer ring of the plug and along the cylinder wall there was some heat building up inside... also i think i see some out of roundness on the edges of the piston like it was rounding off or meltitng away... hmmm

hondaguyef

The only thing I can tell is that their appears to have been excessive heat in that cylinder. Hard to get any info off of the plug because it's oil soaked and I see some hairline cracks on the piston that may have been caused by detonation. I would suspect injector failure at this point because all the other cylinders look fine. Send them to be flow checked and mark the injector that was removed from that cylinder. Were you under load when this happened or was it right when you let out of the throttle? The plugs look a lil' lean to me.

Phil

SOHCD16y8

Stuff like this scares the **** out of me.

wantboost

iTrader: (2)

detonation, melted the piston and the spark plug, you can also see where it cracked the sleeve if you look carefully

st00pid

We understand what caused the damage. We are trying to figure out what cause the detonation and heat in that particular cylinder. The AFRs were 11.3-11.5:1 AFRs on C16 only.

wantboost

iTrader: (2)

my guess goes to injector failure or something involving the injector in thqt cylinder

DRIVENRacing

ouch... maybe bad c16??

Jared

have someone flow test those injectors. even the combustion chamber looks different in that cylinder.

leed

Interesting that it failed on the exhaust side of the chamber. Usually seems to happen on the intake side.
Atleast the head appears to be ok in the pics; coulda' been worse $$$

Jared

any word on this?

alopez84

Not yet we are still trying to figure it out. I am going to get the injectors flow tested to see if that was the problem. Just tyring to get more opinions on what happen because i have never seen anything like this before.
Thanks Aaron

B18 CYA

what was the timing set at?

.2000psi.

I'm guessing you only have one wide band probe like 99% of us right? that probe is measuring all 4 cylinders at the same time so maybe if one leaned out it wouldn't show up. Maybe the injector wasn't firing for whatever reason in that cyl?

USDM 4G VTEC

it Detonated period
and it was a nice strong one


remember it only takes 1-2 good strong BAD detonations to blow an engine.... doesnt really need to detonate for a while

RA166E

I would pull the piston and check to see if the 1st or 2nd ring is pinched.
If this happens it will start a change reaction of bad events.

But the question is... why. The injectors should be flowed to see if thats the culprit.

earl

I had some c16 go bad once and it immediately turned a good motor into one that looks like yours.
If that is not your problem, obviously excessive heat caused this damage and #3 cylinder runs the hottest. Usually this kind of damage is caused from excessive timing in that cylinder or too much timing overall and that takes out the hottest cylinder first.
If an injector is not firing at all, that cylinder will not make any heat at all as that takes fuel to accomplish.
One thing to note is that you said the motor laid over in high gear. That is when the motor is loaded the heaviest (working the hardest) and thus generating the most heat.

alopez84

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">I had some c16 go bad once and it immediately turned a good motor into one that looks like yours.
If that is not your problem, obviously excessive heat caused this damage and #3 cylinder runs the hottest. Usually this kind of damage is caused from excessive timing in that cylinder or too much timing overall and that takes out the hottest cylinder first.
If an injector is not firing at all, that cylinder will not make any heat at all as that takes fuel to accomplish.
One thing to note is that you said the motor laid over in high gear. That is when the motor is loaded the heaviest (working the hardest) and thus generating the most heat.</TD></TR></TABLE>

Hmm... That makes me think. I did put about 2.5 gallons of C-16 into my tank the day before, but i always keep it above 1/2 tank so that means it would have about 6 gallons to mix with in there when i made this run. What makes C-16 go bad i only had it about a week and ran with the other 2.5 gallons the week before.
As for the timing issue why would it take 6 month and over 60+ passes for this to happen.
Aaron