Well sad but another true day, my motor was running pretty good for a while it is a JG built motor with golden eagle sleeves JE 9:1 pistons, 5 angle job on intakes 3 angle on exhausts. Running 550cc inj with Greddy E-manage.
Took it to Turbo Tune in Greensboro, NC
Car had been idling and driving fine but would detonate at WOT in the upper RMPS past 4k. Anyway my car was not smoking and after the first run the breather started to pour out smoke, the tuner said he didn't hear any detonation although on the dyno computer I did see a spot where the graph jumped up to 18:1 about 3500rpm this being a SS prelude he had me do the dyno run with the shifter in 3rd gear and had me go through 1,2,3 to redline....after the smoking started to come out I was very concerned and so was he he did a compression test and these were the numbers going from left to right 175, 135, 90, 175.......well being 9:1 I'm guessing the 175's are fine, but the other 2 are looking really bad his intial thoughts are that it would be the headgasket WHAT DO YOU GUYS THIHNK? Would a leak down test determine which it is, I seen my last motor get toasted and smoke like this and this a built motor, on my stock motor the ringlands were blown, so not a good day at all........and if you want dyno numbers 204whp and 225TQ and ya with that kinda compression.
What should my next steps be and can I hold the tuner or the shop responsible in anyway because this was all under their direction, and I made a few videos on my phone.
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X-LUDER now a NSXer
1998 Lude JRSC 9lbs SS
JG FULLY BUILT MOTOR
Greddy E-manage, RC 550CC
Took it to Turbo Tune in Greensboro, NC
Car had been idling and driving fine but would detonate at WOT in the upper RMPS past 4k. Anyway my car was not smoking and after the first run the breather started to pour out smoke, the tuner said he didn't hear any detonation although on the dyno computer I did see a spot where the graph jumped up to 18:1 about 3500rpm this being a SS prelude he had me do the dyno run with the shifter in 3rd gear and had me go through 1,2,3 to redline....after the smoking started to come out I was very concerned and so was he he did a compression test and these were the numbers going from left to right 175, 135, 90, 175.......well being 9:1 I'm guessing the 175's are fine, but the other 2 are looking really bad his intial thoughts are that it would be the headgasket WHAT DO YOU GUYS THIHNK? Would a leak down test determine which it is, I seen my last motor get toasted and smoke like this and this a built motor, on my stock motor the ringlands were blown, so not a good day at all........and if you want dyno numbers 204whp and 225TQ and ya with that kinda compression.
What should my next steps be and can I hold the tuner or the shop responsible in anyway because this was all under their direction, and I made a few videos on my phone.
Holy crap, that's not good.
The 90 is a serious problem. At this point you should not run boost in the motor at all. The only way to solve this is to pull the head and inspect the motor. I wouldn't drive the car at all until you can do this.
How many miles on the new motor? Did you break it in prorperly? Are you running regular oil?
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I am not an active moderator on this site anymore. Please contact Phryxis or liquidxnitez for help with your issues.
The cylinder reading 90 is toast. Did you work out your idle pressure issue and configure the E-manage properly for the 550s before running on the dyno?
I was running 15w 50 Mobil 1 syn, motor has been broken in I had well over a 1000 miles on it. I'm considering just quitting boost and dropping in a stock motor cuz I drive a lot more now and need the lude for a daily driver + better MPG. I'm pretty sure it is going to be the ringlands eventhough these are JE pistons, just by knowing what happened to my previous stock motor. So look for a SC, 550cc RC inj, e-manage with support tool and various other items to be parted out soon.
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X-LUDER now a NSXer
1998 Lude JRSC 9lbs SS
JG FULLY BUILT MOTOR
Greddy E-manage, RC 550CC
Yea shark I had the idle at 40 psi, car was driving pretty good prior to the dyno, in my intial pulls being a newbie I popped the car into neutral right after it went thru 1st gear at 6500rpm, that happened twice and then he explained I need to let the car shift thru the gears at WOT and keep the shifter in 3rd so I redline in the 3rd after this is when the smoke started to come out of the breather and continued to smoke even after it was back down to idle....and now I have all kinds of bogging in the mid range around 3k. Doesn't seem like its the headgasket because I dont smell anti-freeze and I don't have white smoke out of the exhaust.
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X-LUDER now a NSXer
1998 Lude JRSC 9lbs SS
JG FULLY BUILT MOTOR
Greddy E-manage, RC 550CC
Oh I thought you said you were currently on a stock motor with a motor in the shop being built. Get things checked out further, you could have a sunk sleave.
I was running 15w 50 Mobil 1 syn, motor has been broken in I had well over a 1000 miles on it. I'm considering just quitting boost and dropping in a stock motor cuz I drive a lot more now and need the lude for a daily driver + better MPG. I'm pretty sure it is going to be the ringlands eventhough these are JE pistons, just by knowing what happened to my previous stock motor. So look for a SC, 550cc RC inj, e-manage with support tool and various other items to be parted out soon.
It sounds like you are giving up already, but did you put synthetic in it from the start? Synthetic oil is absolutely not supposed to be used during break-in.
What does the shop say?
The bottom line is that you can't know what the deal is until you pull the head. Pulling the head takes less than 1 hr, so it's not hard.
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I am not an active moderator on this site anymore. Please contact Phryxis or liquidxnitez for help with your issues.
edulerPrelude: Didn't you create another post stating that you were running the JR or another aftermarket FPR with the 550 CC injectors? Did you get your fuel system straightened out before heading to the dyno? Also, it sounds like a sunken sleeve to me also. Good luck.
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TwizT aka Trevor
JRSC * Tuned by DL Motorsports * Built by AutoExpress Crew
I had the fuel issues taken care of and had the FPR set to stock which from what I read in the posts was about 40psi at idle. What all needs to be done for a sunken sleeve? Guys dont get my hopes up though, If a built motor busted on me I think it's pointless to go FI with a supercharger for me, just can't get it right even if I try to by getting it dyno tuned.
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X-LUDER now a NSXer
1998 Lude JRSC 9lbs SS
JG FULLY BUILT MOTOR
Greddy E-manage, RC 550CC
If you have a sleeve that sunk, the block needs to go back to JG.
Word. Is this is JG engine dynamics? I remember tons of people on H-T having huge problems with them. You need to figure out if a sleeve took a dump first though.
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I am not an active moderator on this site anymore. Please contact Phryxis or liquidxnitez for help with your issues.
I'm gonna have to make some time to dig into it, Ken where did you find out about JG engines having a lot of problems I paid a lot of money for this motor and if they are at fault I'd like to dig into this farther otherwise its bye bye boost!
__________________
X-LUDER now a NSXer
1998 Lude JRSC 9lbs SS
JG FULLY BUILT MOTOR
Greddy E-manage, RC 550CC
I'm gonna have to make some time to dig into it, Ken where did you find out about JG engines having a lot of problems I paid a lot of money for this motor and if they are at fault I'd like to dig into this farther otherwise its bye bye boost!
That stuff was all over Honda-Tech awhile back. Unfortunately, those links are very hard to find, so I only found 2:
The following page was set up by a guy who got royally f*cked by JG. He set up his own domain (kinda cool). The domain isn't online anymore, but they Wayback machine has an archive of it. The pictures aren't archived though.
thanks for the info, so let me get this straight if I tear the motor down to checkout the headgasket, can a sunken sleeve be spotted from there? Would it also just mean to have the head shaved to even it out and go with a thicker headgasket so the compression doesnt get up too high? I've spent enough trying to boost right if it's a lot more then this then I'd probably give up on boosting again! Thanks for the help and those threads Ken!
__________________
X-LUDER now a NSXer
1998 Lude JRSC 9lbs SS
JG FULLY BUILT MOTOR
Greddy E-manage, RC 550CC
I'm gonna have to make some time to dig into it, Ken where did you find out about JG engines having a lot of problems I paid a lot of money for this motor and if they are at fault I'd like to dig into this farther otherwise its bye bye boost!
We had a JG head drop a valve on the dyno today while getting tuned. it was a full jg gsr head and it dropped the valve at 8500 rpm and toasted the number 1 cylinder, piston, and intake valves.. they pulled the head off and looked at it, and more of the valves were rubbing the head, and didnt look like they were seated properly.
damn, that sounds awful....when I was looking to have my motor rebuilt I heard good things about JG, but after reading these horror stories and the threads Ken sent, it sure seems like JG's quality control f'd up now! I'm still debating on what to do with mine.
__________________
X-LUDER now a NSXer
1998 Lude JRSC 9lbs SS
JG FULLY BUILT MOTOR
Greddy E-manage, RC 550CC
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