Compression #1 125 PSI, #2 190, #3 125, #4 150
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B*a*n*n*e*d
Joined: Mar 2004
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From: Lawtown, MA, USA
Compression #1 125 PSI, #2 190, #3 125, #4 150
freshly rebuilt gsr
buddy club 3+ cams
81.75 mm jdm type r pistons
dry compression
1. 125
2. 190
3. 125
4. 150
wet
1. 230
2. 300
3. 240
4. 235
what do u guys think the problem is? rings or valves?
if it was rings...what could of caused it? head was completely redone by a machine shop with supertech valves...there was a fuel pressure spike one time up to about 100psi.....but there was always a bad idle even once the motor was first started....completely bummed right now...alot of money was put into this build...did oil change and there was shavings on the magnetic oil drain plug as well...not ALOT ALOT...but enough...please give some input...any is appreciated
buddy club 3+ cams
81.75 mm jdm type r pistons
dry compression
1. 125
2. 190
3. 125
4. 150
wet
1. 230
2. 300
3. 240
4. 235
what do u guys think the problem is? rings or valves?
if it was rings...what could of caused it? head was completely redone by a machine shop with supertech valves...there was a fuel pressure spike one time up to about 100psi.....but there was always a bad idle even once the motor was first started....completely bummed right now...alot of money was put into this build...did oil change and there was shavings on the magnetic oil drain plug as well...not ALOT ALOT...but enough...please give some input...any is appreciated
Re: Compression #1 125 PSI, #2 190, #3 125, #4 150 (mr_ducksauce)
I think it may be the rings. How did you break your motor in? What type of oil are you using? How many miles on the motor since the rebuild?
Thread Starter
B*a*n*n*e*d
Joined: Mar 2004
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From: Lawtown, MA, USA
well it was rebuilt...but always had a bad idle from start...drove it a little bit...rough idle..did everything to it like played a little with timing and idle screw...got it driveable on the road but always had a rough idle...was gonna bring it in for a tune on monday but wanted to do compression check first...did that and these are the results...leakdown test hard?
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From: cincinnati
Re: (mr_ducksauce)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_ducksauce »</TD></TR><TR><TD CLASS="quote">30 weight oil for about 20 miles...changed it over to the 5w30, thats when i noticed shavings</TD></TR></TABLE>
shavings?
shavings?
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From: Single track SD
Re: (mr_ducksauce)
shavings are normal....
theres alot that can cause a rough idle...
how many miles are on the engine?
what was your break in method?
why didnt you adjust the valves when the engine was built..?
and how was there a spike of 100psi of fuel?
thats the worst thing that could happen on a fresh ringed engine...itll flush the oil off the cyl walls...seems like you got a few bugs you should have fixed before initial startup...
theres alot that can cause a rough idle...
how many miles are on the engine?
what was your break in method?
why didnt you adjust the valves when the engine was built..?
and how was there a spike of 100psi of fuel?
thats the worst thing that could happen on a fresh ringed engine...itll flush the oil off the cyl walls...seems like you got a few bugs you should have fixed before initial startup...
Thread Starter
B*a*n*n*e*d
Joined: Mar 2004
Posts: 756
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From: Lawtown, MA, USA
well...valves were adjusted already.... .007 intake .008 exhaust according to buddy club specs.....i was still in the breaking in period....and still am right now...about 100 miles now....honestly i dont know how the spike happened, but it did happen...it happened when we couldnt get it to start b/c of the knock sensor plug....i plugged it in and it would not allow the car to start...i think maybe b/c im running a chipped p28.....IT always had a rough idle from the begginning
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From: Single track SD
Re: (mr_ducksauce)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_ducksauce »</TD></TR><TR><TD CLASS="quote">well...valves were adjusted already.... .007 intake .008 exhaust according to buddy club specs.....i was still in the breaking in period....and still am right now...about 100 miles now....honestly i dont know how the spike happened, but it did happen...it happened when we couldnt get it to start b/c of the knock sensor plug....i plugged it in and it would not allow the car to start...i think maybe b/c im running a chipped p28.....IT always had a rough idle from the begginning</TD></TR></TABLE>
thats the worst way to break in a motor..run a chip with all kinds of different fuel/timing maps for a specific engine.....
you may have ruined the rings by doing so...
oh btw the rings are seated already especially if you ran ND 30w oil...
thats the worst way to break in a motor..run a chip with all kinds of different fuel/timing maps for a specific engine.....
you may have ruined the rings by doing so...
oh btw the rings are seated already especially if you ran ND 30w oil...
Thread Starter
B*a*n*n*e*d
Joined: Mar 2004
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From: Lawtown, MA, USA
well....its supposed to be pretty accurate....and i wasnt planning on running in on the p28 for too long...was gonna bring it to the dyno once everything ran fine for a a/f tune....but the thing is, til now...its still not running right b/c of the rough idle...ALWAYS had a rough idle...i wanted to get everything running right, then onto the dyno right away for just a/f...then keep breaking it in
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From: T dot, O, Hemp Nation
Re: Compression #1 125 PSI, #2 190, #3 125, #4 150 (mr_ducksauce)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_ducksauce »</TD></TR><TR><TD CLASS="quote">
81.75 mm jdm type r pistons</TD></TR></TABLE>
that odd! I was unaware that size was available. It thought it was only 81mm, 81.25mm, and 81.5 mm!
81.75 mm jdm type r pistons</TD></TR></TABLE>
that odd! I was unaware that size was available. It thought it was only 81mm, 81.25mm, and 81.5 mm!
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Joined: Oct 2004
Posts: 1,654
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From: cincinnati
Re: (onepoint6i)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by onepoint6i »</TD></TR><TR><TD CLASS="quote">shavings are normal....
theres alot that can cause a rough idle...
how many miles are on the engine?
what was your break in method?
why didnt you adjust the valves when the engine was built..?
and how was there a spike of 100psi of fuel?
thats the worst thing that could happen on a fresh ringed engine...itll flush the oil off the cyl walls...seems like you got a few bugs you should have fixed before initial startup...
</TD></TR></TABLE>
what shavings are normal? coming from where?
theres alot that can cause a rough idle...
how many miles are on the engine?
what was your break in method?
why didnt you adjust the valves when the engine was built..?
and how was there a spike of 100psi of fuel?
thats the worst thing that could happen on a fresh ringed engine...itll flush the oil off the cyl walls...seems like you got a few bugs you should have fixed before initial startup...
</TD></TR></TABLE>
what shavings are normal? coming from where?
Re: Compression #1 125 PSI, #2 190, #3 125, #4 150 (emotionisdead)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by emotionisdead »</TD></TR><TR><TD CLASS="quote">it almost sounds like you washed the rings from being too rich. do you have a wideband? </TD></TR></TABLE>
I agree with him.
I agree with him.
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Posts: 7,050
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From: Single track SD
Re: (brick top)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brick top »</TD></TR><TR><TD CLASS="quote">
what shavings are normal? coming from where?</TD></TR></TABLE>
a freshly rebuilt engine will always have shavings in the oil and filter..thats why its good to change it right after the rings seat then @ about 100miles again then @ about 1000 miles once more...most builders have their set times on how many miles to change oil on rebuilt engines...ive heard of some changing it like 5-7 times within 1000miles... :shrugs:
what shavings are normal? coming from where?</TD></TR></TABLE>
a freshly rebuilt engine will always have shavings in the oil and filter..thats why its good to change it right after the rings seat then @ about 100miles again then @ about 1000 miles once more...most builders have their set times on how many miles to change oil on rebuilt engines...ive heard of some changing it like 5-7 times within 1000miles... :shrugs: