Need help troubleshooting - Pettit Supercharger and multiple engines
09-26-2012, 12:49 PM
#29
I think your engine blown by detonation and AFR turns lean you say fuel pump makes odd noises when this high pitched sound fuel pump doesn't work well.. Didn't you look on wideband ?
09-26-2012, 12:52 PM
#30
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And that would make oil leak from the back of the engine? Its been dripping oil since I put this motor in.
09-26-2012, 01:48 PM
#32
Matt do you have any logs from before it popped so maybe someone could locate a warning sign in any of the aforementioned areas? as far as i was aware everything was "healthy" untill it went. other than that stalling thing you kept claiming... i thought you were just being a crybaby because i could never get it to reproduce that problem for me lol.
09-26-2012, 02:16 PM
#34
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09-26-2012, 02:32 PM
#37
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I don't think its just the Pettit, if you have a good tune set to what the kit is capable, the kit wont just **** it up; the tune should be fail safe.
At work I have to explain this to helicopter pilots, mortar rounds have a max altitude and you can fly over them, the max altitude is the max altitude, one round isn't going to decide it's having a good day and go 1000ft higher and blow up their chopper.
Similar here, the compressor isn't going to feel frisky and suddenly double its PSI at max RPM; as long as your tune is good, and the engine support systems are able to support, you're good.
At work I have to explain this to helicopter pilots, mortar rounds have a max altitude and you can fly over them, the max altitude is the max altitude, one round isn't going to decide it's having a good day and go 1000ft higher and blow up their chopper.
Similar here, the compressor isn't going to feel frisky and suddenly double its PSI at max RPM; as long as your tune is good, and the engine support systems are able to support, you're good.
Winglebeast. I'd love to listen to some of those conversations 
09-26-2012, 02:48 PM
#39
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Your STFT's are fucked, you definitely have a vacuum leak and it looks like a major one.
The rear main seal or you filter neck or filler neck is leaking and its running down the rear of the block.
My bet is that you guys screwed up the install somewhere. And whether the engine was killed by not addressing the problems properly is TBD.
My bet is that you guys screwed up the install somewhere. And whether the engine was killed by not addressing the problems properly is TBD.
09-26-2012, 02:52 PM
#40
Lol at this point I think matt wishes one of those mortars would land on his car! Seriously though I'm sure its something simple. Can anyone tell from the logs? I'm the wrencher not the mathematician.
09-26-2012, 02:54 PM
#41
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I already said it's a vacuum leak, the logs will not tell you where the leak is coming from. You guys may have been wrenching together for a long time but you are still a couple of noobs.
09-26-2012, 02:55 PM
#42
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To check to see if it's really the rear main seal leaking, pull the starter. If it's the rear main seal the starter nose should be more-or-less coated in oil getting slung about by the flywheel/clutch.
09-26-2012, 03:06 PM
#44
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Never said I wasn't a noob, but I think the people that designed a rotory engine is and they've had plenty of years to work on it
09-26-2012, 03:13 PM
#45
Well there is nothing wrong with the rotary engine you need to find the hose that is leaking. I thought you and moon checked all the vacuum and zip tied everything. I'll admit to being a noob when it comes to the computer aspects... but why didn't we see it during break in or when Kane was tuning?
09-26-2012, 03:14 PM
#46
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No engine is perfect, every production engine will have a premature failure here and there.
whitten and i are by no means noobs... we have been working on cars together since highschool and we know what we are doing.
09-26-2012, 03:14 PM
#47
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I don't think its just the Pettit, if you have a good tune set to what the kit is capable, the kit wont just **** it up; the tune should be fail safe.
At work I have to explain this to helicopter pilots, mortar rounds have a max altitude and you can fly over them, the max altitude is the max altitude, one round isn't going to decide it's having a good day and go 1000ft higher and blow up their chopper.
Similar here, the compressor isn't going to feel frisky and suddenly double its PSI at max RPM; as long as your tune is good, and the engine support systems are able to support, you're good.
At work I have to explain this to helicopter pilots, mortar rounds have a max altitude and you can fly over them, the max altitude is the max altitude, one round isn't going to decide it's having a good day and go 1000ft higher and blow up their chopper.
Similar here, the compressor isn't going to feel frisky and suddenly double its PSI at max RPM; as long as your tune is good, and the engine support systems are able to support, you're good.
09-26-2012, 03:16 PM
#48
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Well there is nothing wrong with the rotary engine you need to find the hose that is leaking. I thought you and moon checked all the vacuum and zip tied everything. I'll admit to being a noob when it comes to the computer aspects... but why didn't we see it during break in or when Kane was tuning?
Kane has you do idle logs first, if there was a problem then it would have been obvious. The number of things that could have been done wrong during the SC install great so there is no way of knowing for sure.
09-26-2012, 03:21 PM
#49
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Well I havnt fooled with anything since the tune. So you think a hose has cracked or came loose then. Everything was inspected and installed prior to the tune.
09-26-2012, 03:24 PM
#50
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It could be a hose popped off under pressure, the vibration loosed a clamp or fitting, a hose cracked, an intake manifold gasket ruptured, or even the service port nipples on the lower intake manifold were blown off. I'd check those two caps on the service port nipples before anything else, since they can come off when NA with a vacuum on the manifold side trying to hold them on. Make it pressurized with a S/C and you are relying on the grip of those caps only, which isn't all that great.