Blew my motor :(
#1
TRINGLS
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Blew my motor :(
I just got the tranny swap going and EVERYTHING was perfect with the car... I was being careless though and decided to do a hard run that popped a rear seal. My only guesses for cause are:
>Fuel Filter (Was about to be replaced next week)
>Old Fuel(2.5 months old)
>Midpipe
Compression test with a non-rotary specific tester got me:
Front peak: 120
Rear peak: 110
Front dynamic: 60, fast jumps
Rear dynamic: 30ish, slower jumps
The Midpipe would be my guess except I was running an ECU TUNED for the midpipe at the time, not the M2:Stage3 in my sig, I was testing with a differant ECU.
Anyways, not sure wher I am going from here but the motor must be replaced.
~Kris
>Fuel Filter (Was about to be replaced next week)
>Old Fuel(2.5 months old)
>Midpipe
Compression test with a non-rotary specific tester got me:
Front peak: 120
Rear peak: 110
Front dynamic: 60, fast jumps
Rear dynamic: 30ish, slower jumps
The Midpipe would be my guess except I was running an ECU TUNED for the midpipe at the time, not the M2:Stage3 in my sig, I was testing with a differant ECU.
Anyways, not sure wher I am going from here but the motor must be replaced.
~Kris
#2
I brake boost
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Damn Kris, sorry to hear that. I hope you don't give up on it just yet. After all that hard work, I feel for you. Seems like you have the time to do this kind of stuff, I know you can get it back up and running as good as new. How much boost? Did it spike or something?
#3
Slizzard sippin sizzurp
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OUCH man...I was just gonna reply to your auto trans thread and see if you got the car running. I've been tempted to push mine but so far no more than occasional 7 psi spurts below 5K. I'll wait to install the Haltech before I fully open her up.
#4
TRINGLS
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That is the thing, the ECU was tuned fro 14.7psi and it was never creeping or spiking, I saw 13-14 PSI the whole time... I never exceeded 7200rpm either...
either way, I'm gonna either remove the pipe and go back to my M2 or sell the ECU's and TRY to get a used PowerFC and base tune to 10-12psi. I'm also gonna port the wastegate while it is out just to be safe.
~Kris
either way, I'm gonna either remove the pipe and go back to my M2 or sell the ECU's and TRY to get a used PowerFC and base tune to 10-12psi. I'm also gonna port the wastegate while it is out just to be safe.
~Kris
#5
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Originally Posted by mazpower
OUCH man...I was just gonna reply to your auto trans thread and see if you got the car running. I've been tempted to push mine but so far no more than occasional 7 psi spurts below 5K. I'll wait to install the Haltech before I fully open her up.
#7
TRINGLS
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afterburn, I was running the RX7.com ECU yes. The car has 68k on it but I'm not sure if the motor was replaced or not. I guess I'll find out with a tear down.
I blame the fuel filter most as I'm almost certian it is the stock filter -- I spoke with someone at RX7.com and they assured me a Midpipe was safe but suggested an upgraded fuel pump if mine was more than 100k old.
I'm gonna go out and try to get my mmind off of it for a bit... gotta go motor shopping later
~Kris
I blame the fuel filter most as I'm almost certian it is the stock filter -- I spoke with someone at RX7.com and they assured me a Midpipe was safe but suggested an upgraded fuel pump if mine was more than 100k old.
I'm gonna go out and try to get my mmind off of it for a bit... gotta go motor shopping later
~Kris
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#9
I brake boost
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Kris, give me a call man, I lost your number. You may not need an entire new motor, depending on how bad it is. Most likely a housing and perhaps a rotor. Call me up if you still have my #.
#10
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Originally Posted by FD Rey
Smart man. I think what Kris did it has happened to many of us on this board, including myself. After I went single I was only running a purble box PMS tuned for stock twins at 10 psi. I pushed my car a lil too much and at the top of third gear it poped That was a year ago and I learned the hard way.
Before this one I had a 400-hp half-bridge'd FC with Haltech & 60-1, and popping engines in that one wasn't so bad...I could yank the engine, rebuild it and drop it back in the car in three nights while working 8-5 during the day. But the FD was a little more painful to remove so I want to make sure the engine lasts as long as possible between rebuilds.
#11
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Originally Posted by JaNusSolSumnus
I'm gonna go out and try to get my mmind off of it for a bit... gotta go motor shopping later
~Kris
~Kris
#13
fuel filter probably. every engine builder I've talked to says they've rebuilt countless engines due to bad fuel filters. most cars with 100,000+ miles stil have originals since it's hidden all the way back in the dif so you don't think about it.
#14
TRINGLS
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Yea, I was schedualing a visit to the dealer to replace mine this week too I'm almost certain it was the filter too.
Anyone ever heard of rx7world.com? They have rebuilds for $1500 -- but I'm wondering if they are just crap and thats why they are cheap.
Thanks,
~Kris
Anyone ever heard of rx7world.com? They have rebuilds for $1500 -- but I'm wondering if they are just crap and thats why they are cheap.
Thanks,
~Kris
#15
RX-7-VETTE
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any body whants to buy an apex power fc and controller let me know www.sfranco@kdhcd.org
#20
Constant threat
I think you need to be SURE what caused your engine to pop, NOT just guess. I am in the same predicament, I THINK I know why, but....without being 100% sure, we risk having the new engine blow too.
#23
Was it cold out when you were pushin it? Cuz I'd suspect the MP, and who knows, maybe in conjuction w/ a crappy fuel filter. MPs are notorious for allowing spike and creep, not to mention running stock pump and injectors, they're already stressed as it is at 14 psi. Sorry about the engine
#24
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Originally Posted by JaNusSolSumnus
>Old Fuel(2.5 months old)
Sorry to hear that you blew your engine after all that work as I've been tracking your progress with your auto to manual swap.
#25
Originally Posted by BlueRex
I think this had a lot to do with it especially with higher boost levels. Fuel stabilizer doesn't cost much at all, might want to think about investing in some next time your car is down for a while.