It seems like more than a few people that I know have gotten broken ringlands from their turbo kits and a relatively "safe" tune...

BUT it seems that they weren't too bright and were using FMU's and small injectors (stock or 310cc)...

What could cause broken ringlands though? The pistons on one motor we took apart were fine looking on top, but when we removed them we saw the ringlands were broken in 5-6 different places on cyl #3.....

Thoughts? Experiences?

 

I've had it happen to me, but it was my own stupidity. My dad bought me a new motor and a Profec B last Christmas....not necessarily in that order.

I was running a stock LS motor with the stock injectors and an FMU. If I knew then what I knew now, I would have known that the pinging noise I heard at 10 psi wasn't my chassis flexing from the additional horsepower.

 

I've also seen this happen on a JRSC Prelude with FMU and their stupid piggyback non-sense.

 

I had a stock motor on a solid hondata tune for 10psi... I didn't pay attention to the boost spikes, cracked 3 ringlands...

 

I'm just trying to narrow it down to what the main cause is... detonation and heat, correct? Why wouldn't the piston melt though? Maybe just like you said - boost spike = lean condition = cracked ringlands...

 

Broken ringlands are cause from detonation. A milla-second of high load detonation can break ringlands instantly.

 

I had a perfectly safe tune on my GSR, modest timing and 11.8:1-12:1 AFR, but a moment of stupidity (forgot I reset the AVCR, held 15psi for all of 4th gear) and viola! 2 melted pistons and 4 sets of shattered ringlands.

 

i just experienced this. I took my block apart yesterday and found that the pistons looked ok as well as the cylinder walls, but once i droppped the pistons out, number 1 was completely screwed, number 4 was just cracked and 2, 3 were fine.

I was running hondata on a conservative tune. B18c1

Funny thing was i drove the car the day before and everything was fine, i went to start it the next day and the car idled like **** and then the valve cover breather was puffing white smoke. The car didnt even move an inch, i just started it.
I guess it was just their time to go.

 

Another reason this is common on Hondas is because of the location of the ring lands (especially obd2's). They're pretty "high" up on the piston. Good for emissions, but that puts them closer to harms way than a lot of other piston designs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Black R &raquo;</TD></TR><TR><TD CLASS="quote">
What could cause broken ringlands though? The pistons on one motor we took apart were fine looking on top, but when we removed them we saw the ringlands were broken in 5-6 different places on cyl #3.....

Thoughts? Experiences?</TD></TR></TABLE>

Same case with my engine. The tops o the pistons were not melted at all, perfect shape, but the ringlands were broken on every single pistons

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fsp31 &raquo;</TD></TR><TR><TD CLASS="quote">Another reason this is common on Hondas is because of the location of the ring lands (especially obd2's). They're pretty "high" up on the piston. Good for emissions, but that puts them closer to harms way than a lot of other piston designs.</TD></TR></TABLE>

Interesting. Does anyone have a comparison picture of this?

 

nOob question and im not tryin to jack your thread but, how do you prevent your ringlands from breaking?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fsp31 &raquo;</TD></TR><TR><TD CLASS="quote">Another reason this is common on Hondas is because of the location of the ring lands (especially obd2's). They're pretty "high" up on the piston. Good for emissions, but that puts them closer to harms way than a lot of other piston designs.</TD></TR></TABLE>

I agree but then I ask, why arent the aftermarket piston companies redesigning their pistons not to have this weakness. It seems the ring lands are a pistons Achilles heal.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94cxhybrid-T &raquo;</TD></TR><TR><TD CLASS="quote">i just experienced this. I took my block apart yesterday and found that the pistons looked ok as well as the cylinder walls, but once i droppped the pistons out, number 1 was completely screwed, number 4 was just cracked and 2, 3 were fine.

I was running hondata on a conservative tune. B18c1

Funny thing was i drove the car the day before and everything was fine, i went to start it the next day and the car idled like **** and then the valve cover breather was puffing white smoke. The car didnt even move an inch, i just started it.
I guess it was just their time to go.


</TD></TR></TABLE>

What power and torque was your engine making?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">
I agree but then I ask, why arent the aftermarket piston companies redesigning their pistons not to have this weakness. It seems the ring lands are a pistons Achilles heal.</TD></TR></TABLE>

Hmmm, I thought they were, but I don't have any in front of me right now for comparison. If they're not moving the ringlands lower then my whole assertion might just be BS. Sorry about that...

 

You could be right, I dont know... Are all these people with cracked ring lands using stock pistons?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTC_resurected_CiViC &raquo;</TD></TR><TR><TD CLASS="quote">I had a perfectly safe tune on my GSR, modest timing and 11.8:1-12:1 AFR, but a moment of stupidity (forgot I reset the AVCR, held 15psi for all of 4th gear) and viola! 2 melted pistons and 4 sets of shattered ringlands. </TD></TR></TABLE>

Thats odd, I normally see melted piston, OR cracked ringlands. .
In my case, every piston broke every ringland, but no melted tops, or edges, or sides or anything. .

 

Wow this thread reminds me when I busted rod #4. Pistons were in GREAT shape and so were the ringlands. Meanwhile I had a pile of mush in my oil pan. My timing was WAY too far advanced too. Hell, probably lean as well. I just dont get it though. Why didn't the ringlands go at least.

The other pistons/rods/ringlands were good too.

I would imagine its just like everything....the weakest link will give way first.

 

D series rods are a hella lot thinner than the B's. Maybe that's why.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by m R g S r &raquo;</TD></TR><TR><TD CLASS="quote">D series rods are a hella lot thinner than the B's. Maybe that's why. </TD></TR></TABLE>

haha good point

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 02viclx &raquo;</TD></TR><TR><TD CLASS="quote">nOob question and im not tryin to jack your thread but, how do you prevent your ringlands from breaking?</TD></TR></TABLE>

would like to know too....

so what causes boost spike/boost creep? can i prevent it? i'm planning on running uberdata w/ an obd2 to obd1 conversion p72...

stock pistons/rings here too....

 

An inefficient/misplaced wastegate design will cause creep. As for spike, an incorrectly installed/setup boost controller, unhooked wastegate, kinked wg line, etc, can cause spike.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by m R g S r &raquo;</TD></TR><TR><TD CLASS="quote">hella lot thinner </TD></TR></TABLE>

Aren't you on the east coast? That dogged out word is only for those west coast chumps. Cmon man represent us right!

 

In respone to mdpalmer's question:

Stock block

242 whp 171ftlbs on 7lbs daily driven

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by newgsrdriver &raquo;</TD></TR><TR><TD CLASS="quote">

Aren't you on the east coast? That dogged out word is only for those west coast chumps. Cmon man represent us right! </TD></TR></TABLE>

yeaa
***** im from new yorrrkkk. .

hahaha, sorry i was lazy, i didnt want to type a hell of a lot thinner. . .