Why did I over boost? 23 psi!!!
01-15-07, 01:04 PM
#26
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Sorry to hear about that, but I have a suggestion for the future:
- Set the PFC target boost for what you are running. This would have fuel-cut before you hit boost that high.
Good luck with your rebuild!
- Set the PFC target boost for what you are running. This would have fuel-cut before you hit boost that high.
Good luck with your rebuild!
01-15-07, 01:19 PM
#28
re: the V8 swap , I got to ride in an LS1-FD the other day, and it felt very well balanced, not front-heavy at all. The power was very predictable. If you've got a careful right foot, the car will give you full power the instant you hit full throttle; there's never a power surge when a second turbo kicks in. The owner mentioned that sometimes he missed that surge of power when the turbo(s) fully spool, but if you're looking for reliability and HP per dollar, the LS1 is pretty hard to beat.
-s-
-s-
01-15-07, 01:19 PM
#29
Thanks for the replies guys. I really appreciate your input. This is just a car and I had worst things happen during the last 6 months to really put things in perspective 
First of all I realize that this is not a ROTARY SPECIFIC failure. Any car would have blown up if over boosted by twice the amount that it was originally tuned for. That is also a reason why N/A power is sounding really appealing right about now.
The car was a body shop I had just taken the car out that night. I seriously doubt these guys touched anything, they are pros.
The fuel dump and pop off valves are a great idea.
yeah I'm gonna go ahead and do a compression test anyway. Though I seriously doubt that it is not blown because the motor sounds completely different. So I am going to go ahead and assume the engine is blown until proven otherwise.
not but my turbos were. I would only creep at the top of third and fourth to 11.6 psi.
See the scary thing is that my motor would only survive if I had enough fuel for 23 psi. That's nutty in itself.
thanks, **** happens. It happened at the palomar 5 north on ramp in Chula Vista
yeah it is So you ended up going nonseq also. How did you like it? Me personally I like not having anymore boost issues but the lag bites. Not as much as having no compresion though ha ha
Yeah I heard about the Hinson weld issues. Last I heard he got that taken cared of. But still ya never know.
Yeah on cold night the most I ever saw was 12 psi when I was set to 10. I am tuned safely for 12 so It was ok.
Thanks Rich I really appreciate the offer. This issue is not about being able to afford the rebuild which I can just fine. This issue is more about what if it happens again... I think I would be very afraid everytime I boost even at a low boost setting. And that's no fun
I plan to keep this car forever so being somewhat practical HAS to be in my future.
Thanks Kai. What can I say.
I do love my car and it's engine. I love how the turbos kick in, how fire shoots out the tail pipe, how the exhaust tone sound. The handling. All that is pure sex to me.
But this has just blowned my mind.
yeah it been rather cold here lately. Yeah It be really nice if it wasn't blown
I'll get around to doing a compression test. I'll keep you guys posted on what's what.
First of all I realize that this is not a ROTARY SPECIFIC failure. Any car would have blown up if over boosted by twice the amount that it was originally tuned for. That is also a reason why N/A power is sounding really appealing right about now.
Originally Posted by Rotary4tw
Wastegate failure, vaccum hose issue from your EBC install?
Where you doing any work to the car recently to either of those systems that could have caused it?
I think it's safe to safe something in your EBC system failed.
Two things that can save you next time:
1) Run a aftermarket ECU and program it for a "fuel dump" 2 pounds over your high boost. That way if you do overboost you will bog the engine to a rich choke.
2) Install a pop-off valve and set it to 1-2 pounds over your high boost setting. If you overboost, instant vent to atmosphere that cannot fail.
I'm installing my EBC in a few weeks, and this is the exact thing I'm afraid of!
Also, you might want to do a compression check before you consider it blown. 23+ psi is going to blow off any loose vac hoses to the manifold, and if they are off the car is going to run like crap and act blown.
Good luck!
-R4tw
Where you doing any work to the car recently to either of those systems that could have caused it?
I think it's safe to safe something in your EBC system failed.
Two things that can save you next time:
1) Run a aftermarket ECU and program it for a "fuel dump" 2 pounds over your high boost. That way if you do overboost you will bog the engine to a rich choke.
2) Install a pop-off valve and set it to 1-2 pounds over your high boost setting. If you overboost, instant vent to atmosphere that cannot fail.
I'm installing my EBC in a few weeks, and this is the exact thing I'm afraid of!
Also, you might want to do a compression check before you consider it blown. 23+ psi is going to blow off any loose vac hoses to the manifold, and if they are off the car is going to run like crap and act blown.
Good luck!
-R4tw
The fuel dump and pop off valves are a great idea.
yeah I'm gonna go ahead and do a compression test anyway. Though I seriously doubt that it is not blown because the motor sounds completely different. So I am going to go ahead and assume the engine is blown until proven otherwise.
Originally Posted by Maximum
Was your wastegate ported? Sorry to hear you lost the engine
Originally Posted by mono4lamar
i wouldnt switch sides over this. you need some fuel upgrades running higher boost. you didnt list upgraded injectors so im assuming your running the stock setup. build a new motor and put some money into everything in that engine bay!
Originally Posted by dgeesaman
Definitely sounds like one of the wastegate lines got loose and disabled it.
That's really unfortunate.
Dave
That's really unfortunate.
Dave
Originally Posted by Hashiriya
Sad to hear that, Montego. It's been really cold lately around SD, so I've been wary about driving my car out even though I finally got it together and running after a year. My mods are not so disimilar to yours minus the street port and MP, but I was following the same train of thought that as long as I kept it to around 10 psi, I won't have to worry too much.
Stories like yours are so dispiriting when you hear them.
Which onramp were you on when this happened?
Stories like yours are so dispiriting when you hear them.
Which onramp were you on when this happened?
Originally Posted by RX7 RAGE
come back with spinning doritos my friend it must be real disheartening to blow a motor like that though. im gonna make sure my ebc is hooked up right to my full non seq turbos.
it must be real disheartening to blow a motor like that though. im gonna make sure my ebc is hooked up right to my full non seq turbos. So you ended up going nonseq also. How did you like it? Me personally I like not having anymore boost issues but the lag bites. Not as much as having no compresion though ha ha
Originally Posted by gracer7-rx7
FWIW, the LS1 route isn't fool proof either. People have been having issues with the welds on the subframes and other parts.
Yeah I heard about the Hinson weld issues. Last I heard he got that taken cared of. But still ya never know.
Originally Posted by GoodfellaFD3S
Colder air is denser, typically the car will make more boost in cooler weather. I've seen swings from as high as 16 psi on a cool morning in one part of NJ to 12 psi on a hot track in anothe part of NJ on the same day. This was with my BNRs w/ported wg and leaving my profeb b on the same setting.
Montego, sucks to hear that that happened to you. Sounds like a wastegate line came loose, if I had to guess. If you want to take the motor out and ship it to NJ, I can rebuild it for you for a pretty good price.
Montego, sucks to hear that that happened to you. Sounds like a wastegate line came loose, if I had to guess. If you want to take the motor out and ship it to NJ, I can rebuild it for you for a pretty good price.
Thanks Rich I really appreciate the offer. This issue is not about being able to afford the rebuild which I can just fine. This issue is more about what if it happens again... I think I would be very afraid everytime I boost even at a low boost setting. And that's no fun
I plan to keep this car forever so being somewhat practical HAS to be in my future.
Originally Posted by KaiFD3S
daym...sorry to hear Elliot...Stick to the rotor man..dont give up...
I do love my car and it's engine. I love how the turbos kick in, how fire shoots out the tail pipe, how the exhaust tone sound. The handling. All that is pure sex to me.
But this has just blowned my mind.
Originally Posted by adam c
Although colder air is denser, we must remember that this is in San Diego, where frigid temps rarely drop below 50 degrees 
.
Montego, I hope your engine is OK
.Montego, I hope your engine is OK
I'll get around to doing a compression test. I'll keep you guys posted on what's what.
01-15-07, 01:22 PM
#30
Originally Posted by rynberg
Sorry to hear about that, but I have a suggestion for the future:
- Set the PFC target boost for what you are running. This would have fuel-cut before you hit boost that high.
Good luck with your rebuild!
- Set the PFC target boost for what you are running. This would have fuel-cut before you hit boost that high.
Good luck with your rebuild!
Now this actually sheds light unto things. True and realistic preventive measures that gives me hope.
01-15-07, 02:10 PM
#32
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Originally Posted by WaLieN
Some places in SD County were seeing temps in the 20's this weekend! The weather has been nuts here, lately.
01-15-07, 02:45 PM
#34
Sorry about this. Did you check the wastegate line? I can't think of anything (other than boost controller malfunction) that would cause such a massive overboost. I boosted to 17psi once because I installed an MBC in reverse in my wastegate line - which effectively prevented the wastegate from opening. It would have gone higher if I hadn't removed my foot from the accelerator.
01-15-07, 03:14 PM
#35
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Originally Posted by montego
Originally Posted by Maximum
Was your wastegate ported?
not but my turbos were.
Was your wastegate ported?
not but my turbos were.
01-15-07, 03:32 PM
#37
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Where did I say it would have saved his engine? And a ported wastegate does assist in preventing overboost. So whats the problem? I probably should have put "help" in between "done to" and "prevent anything", but I figured you'd able to get the point. I'll make sure I don't forget next time to assist your reading.
01-15-07, 03:39 PM
#38
Wastegate porting is irrelevant here. Wastegate porting prevents the possible ~3-4psi of boost creep that can result from the addition of a midpipe. And this creep is consistent - it does not just appear out of the blue. Something else entirely is going on for the car to hit 23psi.
01-15-07, 03:49 PM
#39
development
Originally Posted by MADDSLOW
Where did I say it would have saved his engine?
Originally Posted by MADDSLOW
porting the wastegate is a pretty important safety mod. I'm having mine done to prevent anything like this from happening. If you do decide to go with another 13B, you should probably make sure you get that done...
I'll make sure I don't forget next time to assist your reading.
01-15-07, 03:58 PM
#40
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Originally Posted by MADDSLOW
I probably should have put "help" in between "done to" and "prevent anything"
Originally Posted by MADDSLOW
If you do decide to go with another 13B, you should probably make sure you get that done...
Originally Posted by dubulup
lose the attitude.
01-15-07, 04:16 PM
#41
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DONT GO LS1..stick with your rotors..just be more careful and if you rebuild or some other person..make sure they do every little thing right..good luck
01-15-07, 04:20 PM
#42
I agree that porting my wastegate is a good idea as far as being able to control boost. In my case, the creep is "below" my high boost. I only crept about 1.5 lbs which really is nothing at all. My 12 psi setting was rock solid.
My engine probably blew at 17 psi (stock MAP sensor) that's 6 lbs below the peak boost that I hit!
I've been talking to my mechanic about this. About a month and half ago I was fidiling with installing my Pre-auto headlights and I removed the M2 intake because I was cutting stuff. It's possible that I knocked loose the wastegate hose without noticing and it finally came off the other night. When I get home I'm gonna take a look.
If that's the case: I'm sticking with the rotary for sure. I'll keep you guys posted
My engine probably blew at 17 psi (stock MAP sensor) that's 6 lbs below the peak boost that I hit!
I've been talking to my mechanic about this. About a month and half ago I was fidiling with installing my Pre-auto headlights and I removed the M2 intake because I was cutting stuff. It's possible that I knocked loose the wastegate hose without noticing and it finally came off the other night. When I get home I'm gonna take a look.
If that's the case: I'm sticking with the rotary for sure. I'll keep you guys posted
01-15-07, 05:06 PM
#44
What's your point ?
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Not sure why you would be disheartened. There's no way you can plan on total failure of any component in the fuel/boost system. Unless you tune for 25 psi on pump gas with the stock fuel system how can you expect it to stay together under anything but what it's tuned for.
01-15-07, 05:12 PM
#45
Originally Posted by CantGoStraight
Not sure why you would be disheartened. There's no way you can plan on total failure of any component in the fuel/boost system. Unless you tune for 25 psi on pump gas with the stock fuel system how can you expect it to stay together under anything but what it's tuned for.
01-15-07, 05:23 PM
#46
What's your point ?
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Originally Posted by MADDSLOW
From what I've read on the forums, porting the wastegate is a pretty important safety mod. I'm having mine done to prevent anything like this from happening. If you do decide to go with another 13B, you should probably make sure you get that done...
01-15-07, 05:38 PM
#48
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Originally Posted by montego
that's exactly why. Because out of the blue a total and unexpected catastrophic failure occured. I don't know about you but that certainly takes the air out of my tires.
