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Old 11-07-2001, 12:14 PM   #1
scoobywanted
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Talking 15-30psi turbo kit...

I started the best engine yet thread and finalized on my decision. I will be buying a 99-00 2.5rs, and will be looking for extremely high boost applications. My question to you is...What is the recommended turbo kit that will get me EFFICIENTLY make 15psi-30psi? I don't want a segnificant lag on the turbo, but realize one must make sacrafices for higher boosts. I also stumbled upon a website that had almost everything immaginable for the 2.5rs on their online shopping cart. I have somehow lost this adress and was wondering if it sounded familiar to anyone here.
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Old 11-07-2001, 12:18 PM   #2
Jewbaru
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my suggestion, Vishnu. You'll need a custom turbo prolly, but you WANT engine managment. Custom as in a different turbo than they give you.

Anyway, why 99? 2000s have the rear LSD, and you're gonna need new pistons anyway. If you get the TEC II, you won't have to worry about the MAP Sensor.
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Old 11-07-2001, 12:50 PM   #3
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Maybe you were thinking of Graham Goode as the website?

You could probably get a ball-bearing turbo to help spool-up.
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Old 11-07-2001, 01:16 PM   #4
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I'm with Jewbaru on this for the most part. The key pieces will be a good turbo setup (either Vishnu or Forced Air Tech), a strong tranny & clutch setup, engine management (TEC-II) and a built engine (pistons, valves, springs).

Make sure you have plenty of money because your looking at needing to spend around 12k for that setup.
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Old 11-07-2001, 04:07 PM   #5
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didn't we just have this discussion? psi in terms of what??? maybe you should thinking in terms of power instead of psi... psi really is not relevant without turbo sizing and other factors... front mount? etc etc...

"...started best engine thread yet..." hehehehehe n00b
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Old 11-07-2001, 05:55 PM   #6
scoobywanted
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Default HOK,

you are always triing to bust my balls on this aren't you . Okay then i want to have a car capable of producing 500 hp. I figure it will take me about 28-30 psi to get me there.

"Maybe you were thinking of Graham Goode as the website?"

Thanks. That isn't the same website but it will work.
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Old 11-07-2001, 06:07 PM   #7
subachad
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If you want to know what it'll take to get that 500hp, check this link...

http://www.turbofast.com.au/tfcalc.html

Chad
93 1.8T
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Old 11-07-2001, 07:11 PM   #8
Keiho
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Vishnu or Technik Motorwerks.

You're going to have to run a standalone engine management system.

Bring your wallet.
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Old 11-07-2001, 07:55 PM   #9
bensonwrx
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Hmmm, so with Vishu turbo kit, TEC-II, and maybe a boost of 10psi, will be sufficient to get me to 250-280hps range? Of coz clutch/flywheel need to be changed. If so, I'll imagine 250-80 to the wheel or flywheel?

I considered the power output and speed factor more...so if a 5psi on Impreza will make the same power, I'll take it! Of coz the lag must not be too outrageous.

-Benson (Another MY98 Owner)
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Old 11-07-2001, 08:06 PM   #10
bsquare
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With the right injectors along with the parts you list you can have over 300hp to the wheels on pump gas. For 500hp, you won't be able to use stock internals, period.


Ben
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Old 11-07-2001, 09:29 PM   #11
kastle
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Don't forget the much needed stronger tranny.... A lot of people who run over 7psi end up needing new gears.
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Old 11-07-2001, 09:53 PM   #12
Joe Hogan
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A conservatively tuned Vishnu kit [the old style using a Minnam type setup] will produce about 325hp at the crank at 10 psi. About 250hp at the wheels. The "new" kit is expected to be much more effiecient due to optimized up/down pipes and turbo design.

That is about the numbers the MY99RS-t that I drive everyday makes as per a Dynojet. You can expect better than this with the new Vishnu kit.

If the car is used daily and run hard be warned that higher power levels youwill be doing major R&D engineering throughout the drivetrain. If you don't have "the wallet" and facilities you may want to rethink your 500 hp goals..

You can have a very fun and safe 7-9 psi car that is otherwise mostly stock that can be driven hard everyday. Many guys are doing this with proper tuning and electronics ie TECII etc. These cars are plenty fast.

Just my $.02

Joe Hogan
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Old 11-08-2001, 12:28 AM   #13
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Default scoobywanted...

No way man... i'm trying to help... see when you quoted power look at all those responses... and good ones too...

you should thank me hhheehehehe
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Old 11-08-2001, 02:23 AM   #14
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hope you are ready to take out a loan.

Jeremy
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Old 11-08-2001, 08:31 AM   #15
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What do you plan on doing with the block after you have blow the cylinder walls apart into little teeny tiny pices? You know it IS an open deck block. Resleeving it will never work for a street application unless you have it resleeved in such a way as to make it a closed deck block. And i do not believe that make sleeves like that for a 2.5 engine.

30psi is un-reasonable on that block. 15psi is do able with aftermarket internals. At 18psi I believe you would be at THE limit of the factory block.

That being said - Get cheap and get a 95 two door. Then go to an engine importer and buy a 22b engine. You have just paid less for the engine and car then you would have for the original intented RS. On top of that, you can run 25 or so psi on the 22b engine with correct fuel and tuning.

My 2 cents ...
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Old 11-08-2001, 08:58 AM   #16
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you can't buy a 22b engine.
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Old 11-08-2001, 09:58 AM   #17
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What everyone seems to forget when they go down this path is that a car is an integrated system. Even if you manage to get 500HP out of the 2.5, you are faced with the problem of not destroying the rest of the car.

In addition to spending the $10K+ to build up the engine you are looking at:

Clutch replacement - $500
Transmission buildup - $5,000 - $7,000
Hard bushings throughout - $2,000 - $3,000
Axle replacement - no clue, I haven't done it yet
Three differential replacements - $3,000 - $5,000
Body kit to add wider tires - $2,000
Brake replacement - $3,000 - $5,000
Suspension replacement - $2,000 - $3,000
Rear hub replacemnt - $1,500 - $2,000

So like everyone said, I hope you have a deep wallet. This is exactly what I am going through. I have a $50,000+ MY2K Impreza sitting at Vermont SportsCar right now and it is only putting out 300+ HP.

Kurt
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Old 11-08-2001, 10:02 AM   #18
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is there even a block out there made to handle 30 psi? even in concept cars i dont think they try that. maybe the quad turboed w16 vw thing.

as for the tranny for a 500 hp rs your looking at a custom made race tranny. i dont think theres one out there made to handle the torque that comes along with that power
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Old 11-08-2001, 10:22 AM   #19
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hollinger dogbox....but hte gearset alone cost about 8g's...IIRC

Jeremy
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Old 11-08-2001, 10:38 AM   #20
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Quote:
Originally posted by totoherbs
is there even a block out there made to handle 30 psi? even in concept cars i dont think they try that. maybe the quad turboed w16 vw thing.
Some guys out in Cali run up to 48psi on a VR6 block in their drag car, which ran 7.8ish in the 1320. That's a closed deck block, though... Hey Kurt, do you need a pool boy or something?
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Old 11-08-2001, 10:45 AM   #21
63Alpine
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Sorry, I had to sell the pool to pay for the brakes on the car. Trust me I didn't start out wanting to put all that money into my car.

I beefed up the HP so I needed a new clutch, the new clutch made me have to replace the tranny. The tranny caused the bushings to start squirming around on shifts making parts bang around. I can go really fast now! Oops, I can't stop! Aggghh I need brakes, and so on.

Kurt
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Old 11-08-2001, 10:51 AM   #22
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If you want those HP numbers, and that much boost, you're gonna need a:
closed deck block
lower CR pistons
dual valve spring set up
stronger rods
Stand Alone ECU
FMIC
BB turbo (big one at that)
bigger radiator
huge injectors
a WRC tranny to handle the power
4 pot front brakes
water injection system
and much much more...
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Old 11-08-2001, 01:11 PM   #23
scoobywanted
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Default okay what the hell...

is all this talk about the ej25 not being able hold all that power. If you go to the factory forced induction forum and look for the thread titled best subaru engine yet? and you will see that they recmmend all different kinds of engines and i chose the ej25. I do have a dep wallet, and many of you are lookingover the fact that subaru is not FORD. They are alot stronger than you think they are. I need some good quality suggestions on which tranny i should get top handle all this power. Same thing with the clutch. Hum how about the axles, and so on. Please just don't tell me what i need without triing to pusjh me in the right direction. names, and websites are alway a big help to me.
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Old 11-08-2001, 01:40 PM   #24
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well mr deepwallet go with a closed deck thats a must. and for trany hollinger dogbox, act race clutch, carbon drive shaft. probly have to do something with the diffs
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Old 11-08-2001, 04:15 PM   #25
bsquare
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Why is anyone taking scoobywanted seriously? He doesn't understand what you are telling him.

Could someone provide evidence that an open deck motor can't handle high boost? I've seen theory and conjecture, but no proof.


Ben
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