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Old 01-15-2001, 08:18 PM   #1
Bumsarama
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Member#: 3137
Join Date: Dec 2000
Location: Saint Louis, MO, USA
Vehicle:
2005 STi
WRB Nukabe/Cusco/Carbotec

Question Need help with hp increase!!!!!!!

I am pondering whether or not to go Turbo. Supercharging would also be an option. What kind of turbos do you guys have. Any preference between turbo and supercharger?? What kind of CONFIRMED 0-60 times/Quarter-mile times. Is stage one turbo reasonable enough or is stage two necessary. What kind of Confirmed horsepower readings. Is a ECM necessary. How fast did Sport Compact Car get their Sube to go?? Most of all, how realiable is it???? Any one with blown engine stories?? Need major input. Any help appreciated. Sorry to bombard you guys with all these questions. On a side-note, please make the effort guys to make it to the big Sube meet in KC.
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Old 01-15-2001, 10:22 PM   #2
ImprezaRS dot com
over boosted again
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Location: Colorado Springs CO USA
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2015 Forester 2.0 XT
2005 2.5 RS, 2013 Tribeca

Post

Lot's questions, too tired to answer all Q's, but too friendly to simply say do a search

I have a small IHI turbo (like the one on the old legacy turbo) with 5 psi, and just an AFC and rising rate fuel pressure regulator for tuning. I have a 6x18 intercooler, so I believe I am stage II.

Gtech qtr mile times before were 16.7 @ 84 with intake only, at 6000 feet above sea-level. Afterwards the times dropped to 14.65 @ 97.5 (really 95 at 6,000 rpm 4th gear). O-60 dropped from 8.98 sec stock to 8.4 with intake only, to 6.22 with turbo.

We estimate from the qtr mile times that HP at the wheels is at least 175 at 6,000 feet above sea-level, vs 95 hp stock at this altitude. This is vs 128hp at near (but slightly above) sea-level for a stock car.

You can do a stage I with no intercooler and ECM if you have a rising rate fuel pressure regulator, but will get more power with at least a colder intake charge using an intercooler. As for reliability, they do pretty well - with low power turbo kits the clutch seems to hold up well, as do the head gaskets, etc... My clutch had a lot of hard launches when stock, and died three days after the kit was installed.

Larry www.ImprezaRS.com
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Old 01-15-2001, 10:26 PM   #3
rsquire
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Location: Kirkland, WA
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1998 22B Blue
1986 Ford RS200 White

Post

Simple really

Supercharger around these neck of the woods = frigging disaster. Well except for ARG's

Turbo has been on my car for more than 21000 miles with no problems

Richard
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Old 01-15-2001, 10:27 PM   #4
Eric SS
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Chapter/Region: SWIC
Location: 2013 335i, 2011 G37 coupe
Vehicle:
2000 2.5RS w/ EJ22T
swap and N20. gone. : (

Post

For being tired that is quite a post Larry!

Yeah, you can find all you need to do by doing a search for "Turbo" and "What for more horsepower"

Eric
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Old 01-15-2001, 11:58 PM   #5
Midwayman
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Chapter/Region: MWSOC
Location: Des Plaines, IL
Vehicle:
2006 Acura TL 6spd
STMGM6 alumni

Post

Nice thing about turbos is that once you get one on, big gains are much easier. Im putting on a stage 1, non ic kit at 5psi. I expect 200-220 hp out of it. (being much closer to sea level in chicago, Im betting I get similar times to larry though I wont have a IC) Addind a IC will give you noticable more power, adding a better exhaust will give you more power(much more than NA) etc, etc. IMHO a low pressure turbo wont really shorter the life of your engine much.
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Old 01-16-2001, 01:19 AM   #6
WRX Pilot
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Post

If your interested in 1/4 mile and 0-60 and want cheap and dependable, go with NOS.
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Old 01-16-2001, 03:05 AM   #7
Buckbomb
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Location: Portland Or . SPEC
Post


True but NOS is also (in most applications)really hard on an engine. Especialy if you haven't upgraded to more durable parts. IMHO a small turbo with an IC would be the best for a street car, especialy a daily-driver. Just my .02.
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