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Old 08-02-2001, 01:17 PM   #1
jdchmiel
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Join Date: Feb 2000
Chapter/Region: South East
Location: Raleigh, NC, USA
Thumbs down so many RST's died in the last few days..

I just realized we had 3 or more in the last few days !!!
I am getting nervous about my car now...

is there any list of cars, turbo related mods, and problems/ reliability of each setup??

this would make a great resource to see what is / is not working and why.
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Old 08-02-2001, 01:50 PM   #2
wcbjr
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The people's whose cars work are too happy to post. They are out driving!
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Old 08-02-2001, 02:43 PM   #3
8Complex

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I'm having a couple of stock used pistons overnighted to me... does that tell you how anxious I am to get mine back together?
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Old 08-02-2001, 02:47 PM   #4
stimpy
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The majority (not all of them, but most) of the turbo-induced failures are caused by improper tuning, not because the motor cannot handle it. Heat is also a large factor in a turbo-car's health. More heat = less detonation resistant = easier to scatter motor.

I know of quite a few RS-T's out there running just fine with a stock bottom end. You just need to be smart about it.

-Jon
www.nothingserious.net
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Old 08-02-2001, 03:26 PM   #5
NickSTi
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i dont know the list off the top of my head but danny's failure really does not apply to any of us RS-T owners. His motor was different (ej22T) and his application was very different (tuned for up to 20psi!). Scooby South, and AaronB i am not too familiar with cause or setup. 8Complex - something was wrong and it was apparent from the beginning. I think if all the gauges u have (egt, a/f, oil pressure) are reading safe operating conditions then your engine will be fine.

*PLEASE dont let this message bite me in the arse!*

maybe i should delete.... D'OH!
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Old 08-02-2001, 03:42 PM   #6
efoo
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well, it's summertime, and it's hot out there now. I bet a lot of the turbo cars that blew up were simply running too hot. They were tuned back when it was cooler outside and people kept increasing timing.

This could be a pretty good piece of evidence for intake temp-based timing retard. My TEC-II is set to retard timing by a couple of degrees for every 10 degree Celsius increase in intake temperature. I've run it pretty hot before out on the track under full boost for half an hour at a time with no problems. You can feel a couple of degrees retard pretty well - my car definitely runs slower when it is hot outside, but it doesn't blow up either. I'd rather run slower than not at all, personally.

Of course, now that I've come out and said this, my motor is going to blow up in the heat wave we have going through the Boston area right now. I think I'll try to avoid my jinx by not driving my car until next week, heh.

-Edwin
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Old 08-02-2001, 07:36 PM   #7
DaveK
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So does this mean its better to tune a turbo kit in the summer (if you're not planning on tuning it thruout the year)?

Efoo-do the base maps on the TEC-II change timing based on temp, or is that something you set-up yourself?

Dave
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Old 08-02-2001, 09:20 PM   #8
AaronB
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Mine was simply a result of overboost by a MBC that didn't work at low boost levels.

AFAIK heat wasn't an issue. Since I added the IC I hadn't had a single ping even in the 110+ AZ temps.

I also wouldn't run a non-intercooled setup on a MY00-01. Mine was pinging at anything above 80 degree outside temps back in March.

My failure blew a piece of piston off #3 and cracked the other three pistons. It took all of 2-3 seconds to go from running fine, to I need to limp this broken car home.

It was an expensive learning situation for me. I would recomend having a reserve of funds available in case something crazy happens.

Another thing to keep in mind is that piston/rods lead times are 3-8 weeks per most of the Subaru vendors. If you blow your car up this can be a long wait, especially if it is your daily driver.

Regards,

Aaron
http://www.scoobymods.com
http://www.azscooby.com
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Old 08-02-2001, 11:07 PM   #9
ARG
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Funny.....I have 15,000 miles on my supercharged 99RS and it runs sweet!

ARG
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Old 08-02-2001, 11:10 PM   #10
tom@kartboy
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Al i think your last SC RS on the face of the earth...
when are we gonna run for pinks??
tom@kartboy.com
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Old 08-02-2001, 11:33 PM   #11
ARG
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Rally Blue & Supercharged

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Hey Kartboy. Are you talking about pink grill emblems?

Yes, I would like to run it for the 1/4 mile. I bought another EJ25 short block to build. I wish I had access to your machine shop!!!

I want to move my supercharger to the top of the engine and build a custom intake manifold that uses the intercooler as the plenum.....remember the supercharged Subaru concept vehicle???

Hey Kartboy, send me a PM or email with your private tele number. I need to speak to you personally...

L8tr, ARG
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Old 08-03-2001, 04:42 AM   #12
Scooby South
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99 Ver6 Recreation
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I think mine was induced by a Loose Exhaust that sucked more air into my cylinder...I found Blowby on the exhaust gasket in question......Mine only detted one piston...Which to me is weird...The other 3 were perfect...I am still under the theory of a weak piston casting...the reason I say that is that my dealer said that they have had an unusual amount of motor failures on the MY00 2.5...Especially in some Forrester and Legacy applications....and those were NA family rides...I am trying to put together a database of motor failures...My dealer was more than helpful to feed me the info....
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Old 08-03-2001, 11:08 AM   #13
Kevin Thomas
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1989 1989 XT6

Default Your supercharger!

Quote:
Originally posted by ARG
I want to move my supercharger to the top of the engine and build a custom intake manifold that uses the intercooler as the plenum.....remember the supercharged Subaru concept vehicle???
L8tr, ARG
Hey Arg,

Someday you will be selling your supercharger. A few months or maybe a few years from now but I think you'll be selling it with the intercooler and all. Do you think your setup could fit into an XT6?


Oh....and if you lose faith in the almighty EJ25, it's little brother has been tested and proven (EJ22). Sorry to hear of the problems. L8Rs
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Old 08-26-2001, 03:27 AM   #14
ImprezaRS dot com
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Have a Nice Day?

Looks like i may have the infamous cranked piston on #4. We'll know more later.

I have several options:

(1) JC Sports has the 8.5:1 ceramic topped teflon coated forged pistons in stock, and can o-ring the heads and shot peen the rods while they do this, at about $2,500 for the rebuild. They promise the car back in 2 weeks. No offense to them, but with Murphies law in full force, this really means 4 weeks after the usual unexpected delays, with NO car in the interim.

(2) I can do a full blueprint for about $4K parts and labor (with my vendor discount) and have it back and running in two weeks, only because they were already halfway done building up a short block. No offense to them, but with Murphies law in full force, this really means 4 weeks after the usual unexpected delays, with NO car in the interim.

(3) They can get me stock piston(s) and patch up the motor so I can easily break it again later. Est $700 assuming that the rods, bearings and crank are okay, and be up and running in 1 week. This really means 2 weeks after the usual unexpected delays, with NO car in the interim.

(4) I can drop in a used low mileage 2.2L Phase II motor in just ONE day and drive out there Tuesday for under $2,000 and take my time repairing the stock EJ25 later.

(4a) If the original but blown EJ25 is later repaired to stock condition, then I'll have it as a spare to either (1) put back in the car when I sell car in 3-4 years, and (2) have a spare motor if I blow up the 2.2L that I just put in the car, or (3) after the EJ25 is fixed I can put it back in the car , until I can build up the 2.2L properly with forged pistons, etc...

(4b) While the 2.2L is in the car, I can do the full build up of the original blown 2.5L to put back in the car in a few months.

(5) Buy an EJ20 with tranny, ECU and harness for $1,800 but need a cross member, a cooling system conversion, and 2 weeks to wire it all up at a cost of $500-800 labor. I could resell my old turbo kit for $3,500 to pay the bill, but swap out the JDM compressor for the VF22 out of my current turbo kit.

But, with options 1, 2, or 4b - then if I sell car later without the turbo on it, it wll have a wimpy 8.5:1 compression ratio and at 6,000 feet that will suck.

Options 3, 4a or 5 seem to make the most sense... I am leaning towards 4a - whaddayathink?

Larry
www.ImprezaRS.com
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