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Old 11-19-2005, 07:36 PM   #1
02Suby
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Angry Turbo on 2.5 RS?

anyone know where to get a full turbo kit for a 2002 2.5 rs i have been looking but no luck... thanks
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Old 11-19-2005, 08:08 PM   #2
kgb
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RalliTEK, or SPO
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Old 11-19-2005, 08:34 PM   #3
8Complex

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I think Forced Air Technologies still sells them, too.
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Old 11-19-2005, 08:52 PM   #4
Absubtle
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Old 11-20-2005, 12:31 AM   #5
Sko
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Go with either FAT or the AVO kit, or wait for the rallitek kit.
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Old 11-20-2005, 09:03 AM   #6
robsgotit
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i hate to say it but it will destroy your motor if you leave stock internals in it,
get an sti short block or pistons,
ask around its been proven, the 02 ej25 does not take kindly to boost, anything over 5 psi is risky, and to me thats just not worth it.
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Old 11-20-2005, 09:51 AM   #7
E-Beth
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^^ Second!
We designed and installed a supercharger kit on a MY2000 2.5 RS and it was absolutely wonderful. Until the pistons failed. That was at less than 6 psi, so I imagine damage from a higher-boost turbo would be more severe. Having seen the damage inside the engine myself, I strongly urge you to take robsgotit's advice.

I take all my forced induction questions to Deadbolt (Jerry) at Deadbolt Enterprises. He answers my questions without making me feel like an idiot.

Good luck!
Elizabeth
4 years and still a newbie...
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Old 11-20-2005, 02:01 PM   #8
PHATsuby
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Quote:
Originally Posted by robsgotit
i hate to say it but it will destroy your motor if you leave stock internals in it,
get an sti short block or pistons,
ask around its been proven, the 02 ej25 does not take kindly to boost, anything over 5 psi is risky, and to me thats just not worth it.
have you turbo'd one?

I also bet if you ask around and ask what EM was used you'll see it likely wasn't very good. Tuning is key, you cannot detonate.

Also, E-Beth, that car had no timing correction did it? That hardly proves they are weak, it proves inadequate engine management and bad tuning.

Ben
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Old 11-20-2005, 03:10 PM   #9
SketchINoc
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Quote:
Originally Posted by robsgotit
i hate to say it but it will destroy your motor if you leave stock internals in it,
get an sti short block or pistons,
ask around its been proven, the 02 ej25 does not take kindly to boost, anything over 5 psi is risky, and to me thats just not worth it.
+1, even with proper tuning.
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Old 11-20-2005, 07:24 PM   #10
kgb
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Don't know about the new style RS, but with the old style, as long as you have the right tuning, 5-6psi is not a problem even on stock injectors. Tuning is the key - both increased fuel and ignition retard
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Old 11-20-2005, 08:30 PM   #11
Sko
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All in the tuning. Nuff said.
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Old 11-21-2005, 01:16 AM   #12
White 2.5rs
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yes lol
i love how n00bs put a kit on their car, it blows, then oh the internals suck, i mean i couldnt have not had it tuned properly

for getting around 275hp off of stock internals...id say thats pretty decent
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Old 11-21-2005, 01:36 AM   #13
PHATsuby
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its not just the noobs, it the noobs who have no frame of reference for what they are talking about, have never attempted AFI or know how to tune and they just repeat what everyone else says.

Ben
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Old 11-21-2005, 01:50 AM   #14
Sko
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I've been informed by my local shop and by TWE that our engines have forged rods, crankshaft, cams, but the pistons aren't forged, which is why most ppl say they suck, cause they usualy break first, but that doesn't mean they suck it just means you gotta get a good tune and make sure you pull back the timing enough to handle what your putting out or just lower the boost and keep your timing.
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Old 11-21-2005, 02:32 AM   #15
tony_subaru
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Make sure you take it easy if you turbo it, the NA tranny's aren't made to handle boost.
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Old 11-21-2005, 02:41 AM   #16
reddevil
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NA trannies can handle it fine. Just don't crash gears. 180-200 torque on a 1990 NA tranny. Probably close to 100 drag launches on the first set before I "crashed"2nd gear. 20 plus drag launches on the 2nd set. It still lives.
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Old 11-21-2005, 03:14 AM   #17
Sko
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Yea, guys at my local shop said they've replace plenty of WRX trannys but not a single GC8 tranny, nor have they busted a stock GC8 block thats been turbocharged.

Hope I'm not the first too, hehe.
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Old 11-21-2005, 06:49 AM   #18
robsgotit
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Quote:
Originally Posted by PHATsuby
its not just the noobs, it the noobs who have no frame of reference for what they are talking about, have never attempted AFI or know how to tune and they just repeat what everyone else says.

Ben
im talking about my 02-03 the gc8 has been PROVEN to handle boost, although you'll never see one with a bolt on kit running over 10 psi,
if you can show me an 02 rs motor with over 5 psi of boost tuned to the -t
running for more than a month of daily driving, then maybe ill back down from my claim,
oh and just cause it says "scooby newbie" next to my s/n doesnt mean i just ran out and got my fist subaru yesterday, it just means i dont comment on every post on this sight, only the ones that i think are worth the time to help someone, and give an opinion to possibly help them to not make a costly mistake
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Old 11-21-2005, 11:06 AM   #19
Sko
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Same engine?
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Old 11-21-2005, 04:35 PM   #20
PHATsuby
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Quote:
Originally Posted by robsgotit


im talking about my 02-03 the gc8 has been PROVEN to handle boost, although you'll never see one with a bolt on kit running over 10 psi,
if you can show me an 02 rs motor with over 5 psi of boost tuned to the -t
running for more than a month of daily driving, then maybe ill back down from my claim,
oh and just cause it says "scooby newbie" next to my s/n doesnt mean i just ran out and got my fist subaru yesterday, it just means i dont comment on every post on this sight, only the ones that i think are worth the time to help someone, and give an opinion to possibly help them to not make a costly mistake
If you can show me actual proof they changed the engine internals that somehow makes them drastically weaker, then I'll believe you.

I ran 11psi daily on my engine, like i said its all in the tuning and EM, i had very nice engine management. If i had an 02-03RS I would prove it to you, but I do not.

you are right the GC8 will handle boost, since its made for turbo, we dont have GC8's here, only GC/GM6's which are NA

I am not saying you are a noob or stupid, but your "proof" that it is weak is not very good, find me the motors that have blown and we will analyze what EM they had and why it may have happened. any motor should be able to handle 5psi all day long when tuned properly without detonation.

That's all I am saying, with something that has such a large amount of human input into the equation and human error, you cant lay out blanket statements. You can just as easily blow a "gc8" motor at 5psi with poor tuning as you can an 02-03.

Ben
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Old 11-21-2005, 04:55 PM   #21
8Complex

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I have heard something about them changing the internals of later (02+?) EJ251's, as well. I remember I had the same discussion here on the forums a while back, but don't remember what topic/forum it was in.
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Old 11-21-2005, 05:37 PM   #22
PHATsuby
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Yea, I remember it was discussed but I dont remember anyone actually getting part numbers or anything, I could be wrong though.

Ben
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Old 11-21-2005, 05:54 PM   #23
Aus_RS
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Quote:
Originally Posted by robsgotit
if you can show me an 02 rs motor with over 5 psi of boost tuned to the -t
running for more than a month of daily driving, then maybe ill back down from my claim
http://forums.nasioc.com/forums/show...16#post7905716
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Old 11-21-2005, 07:09 PM   #24
8Complex

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Quote:
Originally Posted by PHATsuby
Yea, I remember it was discussed but I dont remember anyone actually getting part numbers or anything, I could be wrong though.

Ben
Well, I don't know if it was part numbers or just a running manufacturing process change. In a manufacturing scenario, you don't really need to change part numbers so long as the parts are interchangable. The first one was rev A, now it's rev B and the way it's made is different, but the way it is used is exactly the same (fitment, etc).

On a side note, this same thing happened with the EJ257's between 2004 and 2005. The 04's were breaking pistons and the 05's are still strong. (years may be off, but you get the point)
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Old 11-21-2005, 07:47 PM   #25
robsgotit
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Quote:
Originally Posted by Aus_RS
how many miles on the setup?
and how much psi are you pushing?
and is it daily driven?
nice car by the way, mines the same year and color
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