Boosted The DA today...
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From: Portland, OR
Re: Boosted The DA today... (MatHadder)
is your block decked at all?
from looking at your pictures, it looks like the pistons are sticking out the top. I believe a stock deck height gsr motor should have the quench zones of the pistons sitting .030" inside the cylinder.
From the markings on your pistons, it looks like they are aftermarket replacement pistons. It is possible that the castings are not perfect, and the quench height is different in relation to the wrist pin. (I believe this is why I had this problem on the motor I built. It looked like the company who made the pistons opened up the valve clearance areas, and then raised the quench height to make up for the loss of compression. Hence, no valve clearance issues, but serious piston to head clearance problems).
do you know who made your pistons?
from looking at your pictures, it looks like the pistons are sticking out the top. I believe a stock deck height gsr motor should have the quench zones of the pistons sitting .030" inside the cylinder.
From the markings on your pistons, it looks like they are aftermarket replacement pistons. It is possible that the castings are not perfect, and the quench height is different in relation to the wrist pin. (I believe this is why I had this problem on the motor I built. It looked like the company who made the pistons opened up the valve clearance areas, and then raised the quench height to make up for the loss of compression. Hence, no valve clearance issues, but serious piston to head clearance problems).
do you know who made your pistons?
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From: I heart tool, US
Hrmm.
The motor definetly ate something. As far as I can tell, I don't see any obvious signs of detonation.
The pistons weren't hitting the head either. If that were the case, all 4 would be mulched instantly. P72 pistons have a dome in the middle to increase the compression, and concentrate the combustion on the quench pads. The dome is supposed to be beyond the surface of the block.
The motor definetly ate something. As far as I can tell, I don't see any obvious signs of detonation.
The pistons weren't hitting the head either. If that were the case, all 4 would be mulched instantly. P72 pistons have a dome in the middle to increase the compression, and concentrate the combustion on the quench pads. The dome is supposed to be beyond the surface of the block.
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From: DutchLand
Re: (Boostwerks.com)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostwerks.com »</TD></TR><TR><TD CLASS="quote">Hrmm.
The motor definetly ate something. As far as I can tell, I don't see any obvious signs of detonation.
The pistons weren't hitting the head either. If that were the case, all 4 would be mulched instantly. P72 pistons have a dome in the middle to increase the compression, and concentrate the combustion on the quench pads. The dome is supposed to be beyond the surface of the block.
</TD></TR></TABLE>
i doubt it ate anything besides the pistons breaking apart. there are pieces of pistons all over the place.. in my exhaust.. stuck in my head.. etc.
Adam explaned to me on the phone that since the car was ran for a while on a crappy base map ( when it was NA) it just kinda killed the motor slowly. After i added some boost it just ate it and made the pistons break apart. i am sure he can explain it much better then this cuz i suck at explaining things.
matt. its a stock gsr bottom end. with an ITR head that was milled very very little. there was NO clearance issuses .. hence i drove the car for 4k NA.
The motor definetly ate something. As far as I can tell, I don't see any obvious signs of detonation.
The pistons weren't hitting the head either. If that were the case, all 4 would be mulched instantly. P72 pistons have a dome in the middle to increase the compression, and concentrate the combustion on the quench pads. The dome is supposed to be beyond the surface of the block.
</TD></TR></TABLE>
i doubt it ate anything besides the pistons breaking apart. there are pieces of pistons all over the place.. in my exhaust.. stuck in my head.. etc.
Adam explaned to me on the phone that since the car was ran for a while on a crappy base map ( when it was NA) it just kinda killed the motor slowly. After i added some boost it just ate it and made the pistons break apart. i am sure he can explain it much better then this cuz i suck at explaining things.
matt. its a stock gsr bottom end. with an ITR head that was milled very very little. there was NO clearance issuses .. hence i drove the car for 4k NA.
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From: Dont Steal My Car, Ct, USA
Re: (thehatchninja)
Few questions.
U never had this engine apart?B/c if u did, and this was an exsisting condition from it being NA, there would DEF be signs of the pistons breaking aprt.
When u got the car with a lean basemap, did u continue to drive it lean?Or retune it NA?
and 4000miles is alot to drive in a few weeks.
Not talking ****, i like the car and what uve done, but i just had these things in my mind.
U never had this engine apart?B/c if u did, and this was an exsisting condition from it being NA, there would DEF be signs of the pistons breaking aprt.
When u got the car with a lean basemap, did u continue to drive it lean?Or retune it NA?
and 4000miles is alot to drive in a few weeks.
Not talking ****, i like the car and what uve done, but i just had these things in my mind.
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From: DutchLand
Re: (93supercoupe)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93supercoupe »</TD></TR><TR><TD CLASS="quote">Few questions.
U never had this engine apart?B/c if u did, and this was an exsisting condition from it being NA, there would DEF be signs of the pistons breaking aprt.
When u got the car with a lean basemap, did u continue to drive it lean?Or retune it NA?
and 4000miles is alot to drive in a few weeks.
Not talking ****, i like the car and what uve done, but i just had these things in my mind.
</TD></TR></TABLE>
this is the first time i cracked the motor open.
i retuned it after a week i owned it and i barely drove it when it was on that base map. who knows how long it was driven before i got it.
btw.. how is that talking ****?? haha
the pistons were prob very brittle from the lean tune and when we put Real power at it (boost) it fell apart
U never had this engine apart?B/c if u did, and this was an exsisting condition from it being NA, there would DEF be signs of the pistons breaking aprt.
When u got the car with a lean basemap, did u continue to drive it lean?Or retune it NA?
and 4000miles is alot to drive in a few weeks.
Not talking ****, i like the car and what uve done, but i just had these things in my mind.
</TD></TR></TABLE>
this is the first time i cracked the motor open.
i retuned it after a week i owned it and i barely drove it when it was on that base map. who knows how long it was driven before i got it.
btw.. how is that talking ****?? haha
the pistons were prob very brittle from the lean tune and when we put Real power at it (boost) it fell apart
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From: Portland, OR
Re: (redzcstandardhatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redzcstandardhatch »</TD></TR><TR><TD CLASS="quote">with the crazy damage thats happened, it seems that brittle pistons were subjected to power.
why would they be brittle?
tiny amounts of detonation. for a long time.
</TD></TR></TABLE>
Or light contact with the cylinder head for a long time.
I can't say this with 100% certanty, but it looks like your pistons are aftermarket remanufactured honda pistons. The gsr block I have, and all the pictures I have seen, have pistons that say P72 A01 on them. Yours say .00 P72, probably indicating a p72 shaped casting, with zero overbore.
Take a look at the piston to deck height. If they are about .030" below the deck, then I am wrong. If they are higher than that, there is a good chance they were hitting the head. Keep in mind that you need a certain amount of clearance in order to negate the rod stretch that will occur at higher rpms.
Also, assuming some manufacturing variability in the pistons, or a number of other factors, it is very possible that just one piston was making contact with the head, which would explain only one being damaged.
it could just be the detonation, though.
why would they be brittle?
tiny amounts of detonation. for a long time.
</TD></TR></TABLE>
Or light contact with the cylinder head for a long time.
I can't say this with 100% certanty, but it looks like your pistons are aftermarket remanufactured honda pistons. The gsr block I have, and all the pictures I have seen, have pistons that say P72 A01 on them. Yours say .00 P72, probably indicating a p72 shaped casting, with zero overbore.
Take a look at the piston to deck height. If they are about .030" below the deck, then I am wrong. If they are higher than that, there is a good chance they were hitting the head. Keep in mind that you need a certain amount of clearance in order to negate the rod stretch that will occur at higher rpms.
Also, assuming some manufacturing variability in the pistons, or a number of other factors, it is very possible that just one piston was making contact with the head, which would explain only one being damaged.
it could just be the detonation, though.
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From: DutchLand
Re: (MatHadder)
it was an HMO bottom end.. 100% stock. there were no clearance issuses.. end of story. sry to sound like a jerk but i am somewhat sick of hearing it..
it would happened a long time ago if it was a clearance issuse.
only thing i can think of is that my T belt slipped and then we have clearance issues but no it didn't .
sorry for raggin but i am stil upset about the whole thing
it would happened a long time ago if it was a clearance issuse.
only thing i can think of is that my T belt slipped and then we have clearance issues but no it didn't .
sorry for raggin but i am stil upset about the whole thing
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From: Dont Steal My Car, Ct, USA
Re: (TallKyle)
u know how HT gets, as soon as u go against the the grain, shitt hits.
Well one thing u can be sure about is the fact that whoever sold u the engine was atleast honest about the parts that were in it, lol.
Get it fixed, get it tuned, and do it bigger
Well one thing u can be sure about is the fact that whoever sold u the engine was atleast honest about the parts that were in it, lol.
Get it fixed, get it tuned, and do it bigger
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From: NY, USA
Re: (TallKyle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TallKyle »</TD></TR><TR><TD CLASS="quote">well i just checked...
the timing belt did jump a tooth.. my plug wire for cyl 3 was kinda hanging from the dizzy... plug 3 was all wet along with the piston...
i can hear the valve hit the piston as i turn it over with a rachet. ima set the motor back to TDC and see how it feels then..
it is a tight motor.. head was milled some and it does have non oem valves in it.</TD></TR></TABLE>
or is one tooth not enough for a problem?
the timing belt did jump a tooth.. my plug wire for cyl 3 was kinda hanging from the dizzy... plug 3 was all wet along with the piston...
i can hear the valve hit the piston as i turn it over with a rachet. ima set the motor back to TDC and see how it feels then..
it is a tight motor.. head was milled some and it does have non oem valves in it.</TD></TR></TABLE>
or is one tooth not enough for a problem?
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From: I heart tool, US
Re: (TallKyle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TallKyle »</TD></TR><TR><TD CLASS="quote">
i doubt it ate anything besides the pistons breaking apart. there are pieces of pistons all over the place.. in my exhaust.. stuck in my head.. etc.
Adam explaned to me on the phone that since the car was ran for a while on a crappy base map ( when it was NA) it just kinda killed the motor slowly. After i added some boost it just ate it and made the pistons break apart. i am sure he can explain it much better then this cuz i suck at explaining things.
matt. its a stock gsr bottom end. with an ITR head that was milled very very little. there was NO clearance issuses .. hence i drove the car for 4k NA.</TD></TR></TABLE>
Do the other pistons look the same, or is it just #3? If more than one looked that way, then I would definetly count detonation as the main culprit. I was just going off of the pics you posted.
If it were me though... I'd just throw another stock block in there, and have fun with it.
i doubt it ate anything besides the pistons breaking apart. there are pieces of pistons all over the place.. in my exhaust.. stuck in my head.. etc.
Adam explaned to me on the phone that since the car was ran for a while on a crappy base map ( when it was NA) it just kinda killed the motor slowly. After i added some boost it just ate it and made the pistons break apart. i am sure he can explain it much better then this cuz i suck at explaining things.
matt. its a stock gsr bottom end. with an ITR head that was milled very very little. there was NO clearance issuses .. hence i drove the car for 4k NA.</TD></TR></TABLE>
Do the other pistons look the same, or is it just #3? If more than one looked that way, then I would definetly count detonation as the main culprit. I was just going off of the pics you posted.
If it were me though... I'd just throw another stock block in there, and have fun with it.
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From: DutchLand
Re: (Boostwerks.com)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AJxr »</TD></TR><TR><TD CLASS="quote">
or is one tooth not enough for a problem?</TD></TR></TABLE>
it wasnt off. i was smoking crack
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostwerks.com »</TD></TR><TR><TD CLASS="quote">
Do the other pistons look the same, or is it just #3? If more than one looked that way, then I would definetly count detonation as the main culprit. I was just going off of the pics you posted.
If it were me though... I'd just throw another stock block in there, and have fun with it. </TD></TR></TABLE>
ya cyl 1-3 are messed up.
i have an ls long block but i sold the bottom end a week ago. haha
its ok. ima build the GSR bottom end up.. plus its almost winter here in my town. not worth to put back together and have fun for a few days.
i have more pics. ill post in a few
or is one tooth not enough for a problem?</TD></TR></TABLE>
it wasnt off. i was smoking crack
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostwerks.com »</TD></TR><TR><TD CLASS="quote">
Do the other pistons look the same, or is it just #3? If more than one looked that way, then I would definetly count detonation as the main culprit. I was just going off of the pics you posted.
If it were me though... I'd just throw another stock block in there, and have fun with it.
</TD></TR></TABLE>ya cyl 1-3 are messed up.
i have an ls long block but i sold the bottom end a week ago. haha
its ok. ima build the GSR bottom end up.. plus its almost winter here in my town. not worth to put back together and have fun for a few days.
i have more pics. ill post in a few
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From: Chicago area, us
Re: (TallKyle)
Call Opel engineering, i saw them do some pretty crazy **** with some edelbrock aluminum heads last year that were in worse shape than yours. They are great guys over there, and their located in streamwood which isnt that bad.
630-837-2900
630-837-2900
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From: expensive land, usa
Re: (TallKyle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TallKyle »</TD></TR><TR><TD CLASS="quote"> just wonder if a machine shop could fix my head. cuz thats the only thing i care about</TD></TR></TABLE>
i think they MIGHT be able to, id send it to a well known porting and polishing shop.
i think they MIGHT be able to, id send it to a well known porting and polishing shop.
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From: Portland, OR
Re: (TallKyle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TallKyle »</TD></TR><TR><TD CLASS="quote">it was an HMO bottom end.. 100% stock. there were no clearance issuses.. end of story. sry to sound like a jerk but i am somewhat sick of hearing it..
</TD></TR></TABLE>
Sorry, just trying to help out...
I agree with redzc, the head looks like you can just smooth most of that out, as long as you dont mind losing a little material and lowering your compression ratio a bit.
</TD></TR></TABLE>
Sorry, just trying to help out...
I agree with redzc, the head looks like you can just smooth most of that out, as long as you dont mind losing a little material and lowering your compression ratio a bit.
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From: Long Island, NY, USA
Re: Boosted The DA today... (Bimmer99)
did any small rocks get into your engine? if you forgot to put a filter on one day or somethign sneaked in you knwo ?
also is that the exhasut that was on your EF? rightbefore you got rid of it and jsut extended to fit?
GL on that bottom end TK
also is that the exhasut that was on your EF? rightbefore you got rid of it and jsut extended to fit?
GL on that bottom end TK