boosting on cracked ringlands =)
10-20-2004, 11:15 PM
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boosting on cracked ringlands =)
i finally got to taking apart a motor that was boosted for a year with cracked ring lands and here are the pictures...it ran a 13.1@105 at 2200 pounds at 12 psi on a dsm t25 on a d15b7
ringlands and rings are in pieces....
rods looks good but all the bearings are screwed....
ringlands and rings are in pieces....
rods looks good but all the bearings are screwed....
10-20-2004, 11:28 PM
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Re: boosting on cracked ringlands =) (Machine1)
you drove with them like that? if so, wasn't there a tremendous loss of power. i hope mine aren't like that already. 
10-20-2004, 11:42 PM
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Re: boosting on cracked ringlands =) (ChrisRicketts)
Actually, it ran faster after the ring lands cracked because the boost was turned up because it lost a little bit of power.
Compression numbers were #1-180 #2-100 #3-180 #4-180.
Compression numbers were #1-180 #2-100 #3-180 #4-180.
10-21-2004, 04:58 AM
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Re: boosting on cracked ringlands =) (kKdARIAN)
how much psi where you running when you first cracked them? or do you know?, im about to turbo this motor, gonna run 5-6psi, hopefully mine will last ha
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10-21-2004, 11:11 AM
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I cracked all 4 of my ringlands on the dyno, then drove home 250 miles with them cracked. Wasn't making too much power at that point and my compression test results were 20-20-25-80 or something like that. Not fun.
10-21-2004, 11:33 AM
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Re: (PriMaTe)
no plans for the engine...i think its junk...already went with ls and deja vu one of the cylinders is at 110 psi =/ haha yea those pistons do look kindof big...that sucks pfieffdog...
10-21-2004, 01:14 PM
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Re: (94goldjungsr)
I went 12.7 on stock LS with cracked ringlands. All 4 were cracked and on 2 pistons the lower ringland even cracked too. This is all too common after the stock bottom ends see a little detonation. I eventually pulled that motor apart after I cracked a sleeve 
But I drove the car like that for over a year.....it went through oil like crazy.
But I drove the car like that for over a year.....it went through oil like crazy.
10-21-2004, 02:02 PM
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Re: (93LSivic)
That's the correct attitude 
I've racked up over 10K on broken ringlands, only really smokes at high RPM or under boost, but after a few thou smokes a tad at idle. You'd be surprised how little damage there is to the bore from this... the three I've seen torn down would either take a glaze break hone + stock size pistons or .25mm overhone/size. At the very least, the engine is still good for NA duty after an overhone.
I've racked up over 10K on broken ringlands, only really smokes at high RPM or under boost, but after a few thou smokes a tad at idle. You'd be surprised how little damage there is to the bore from this... the three I've seen torn down would either take a glaze break hone + stock size pistons or .25mm overhone/size. At the very least, the engine is still good for NA duty after an overhone.
10-21-2004, 02:44 PM
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Re: boosting on cracked ringlands =) (blackcivic95)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackcivic95 »</TD></TR><TR><TD CLASS="quote">how much psi where you running when you first cracked them? or do you know?, im about to turbo this motor, gonna run 5-6psi, hopefully mine will last ha</TD></TR></TABLE>
^^Ditto that. Im currently running...or should I say will be running 5 psi later today if all goes well with tuning. On a d16y8- stock internals.
I have a feeling my ringlands or rings (?) could be gone. (the compression is skewed from the initial compression test taken before the first test run last week)(I would have a significant amount of exhaust smoke though wouldnt I?)
But not by much... so ive been told with 180k+ mileage, its not out of the ordinary.
I guess time will tell...
^^Ditto that. Im currently running...or should I say will be running 5 psi later today if all goes well with tuning. On a d16y8- stock internals.
I have a feeling my ringlands or rings (?) could be gone. (the compression is skewed from the initial compression test taken before the first test run last week)(I would have a significant amount of exhaust smoke though wouldnt I?)
But not by much... so ive been told with 180k+ mileage, its not out of the ordinary.
I guess time will tell...
10-21-2004, 03:14 PM
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Re: boosting on cracked ringlands =) (Machine1)
that's what my ringlands looked like on my first z6 turboed setup. Still ran a 14.2 @ 10psi with the compression numbers being 175-180-175-45 
10-25-2004, 10:18 AM
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Re: boosting on cracked ringlands =) (pip9)
on a side note.........i just checked my compression and it's fine. i was afraid i had cracked one of the ringlands because the power just didn't feel there, but i guess i'm just getting used to it. i'm running real rich though.
10-25-2004, 10:50 AM
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Re: boosting on cracked ringlands =) (ChrisRicketts)
WTF, You guys boost on crack ring like that??? I had crack ring first it was one but i beleive a few more break since it smoke a lot more. I try to boost it one time, and it boost and pull fine but god damn it smoke like crazy. Mad smoke of out my dipstick hole and breather, am i the only one that smoke this bad?
10-25-2004, 01:45 PM
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Re: boosting on cracked ringlands =) (StolenTeg)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StolenTeg »</TD></TR><TR><TD CLASS="quote"> am i the only one that smoke this bad?</TD></TR></TABLE>
No sir. One single, solitary broken land on one piston is enough to create a Spy Hunter smoke screen at low boost. That's half the fun of it!
No sir. One single, solitary broken land on one piston is enough to create a Spy Hunter smoke screen at low boost. That's half the fun of it!
weak ring lands