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Old 05-22-2000, 06:58 AM   #1
SKiDaZZLe
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Join Date: Jun 1999
Location: Dallas, TX
Thumbs up Legacy Turbo Kit Performance...

(cross-posted to Mlist):

Legacy 2.2 turbo on a MY99 2.5RS:

I took the car to the track on Friday night. I ran a total of 10 times. The best time I ran was 14.232 @ 97.5MPH. This is running 8lbs of boost (intercooled).

The 60' on that run was 1.893. All 10 60' times were less than 2 sec. The slowest I ran was my first at 14.53. There were 4 runs at 14.3, 2 runs at 14.4, and 2 runs in the 14.2 range, including the 14.232.

I am pretty happy with the setup. My clutch is definitely slipping at the top of 4th gear, and some at take-off. I am ording the ACT asap, as well as a BEGI so I can run 10-12lbs. I hope to be mid-13's with that setup.

I ran the car the day before it went into the shop for the turbo kit. The best time I got was 15.6 @ 87MPH. I improved by almost 1.5 seconds and 10MPH.

By the DSM 1/4mile HP calc, I went from 158HP to 217HP. Well, I am not sure if I believe in the ending values of these numbers, but I do think the difference is significant. I almost gained 60HP.

Happy turbo'ing,

Michael
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Old 05-22-2000, 07:34 AM   #2
rao
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Great results Michael!
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Old 05-22-2000, 07:35 AM   #3
awd
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How diificult was it to get the parts and install the turbo. Did you buy the turbo kit or just put it together yourself??? thanks
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Old 05-22-2000, 09:36 AM   #4
Tim Prudence
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It's not that easy.

Michael, you gotta let me know how that turbo performs at 10-12 psi. From what Bill was telling me, those things would get red hot when running 10 psi on a Legacy engine (less displacement, lower compression, but higher redline). So it might not be able to keep up, but there's only one way to tell. Just be sure to keep me informed.

BTW, the ACT clutch is incredible, don't even think about getting a different clutch!

My setup is running great now. I installed colder sparkplugs this weekend (bosch 7s), and that helped out with my pinging problem a lot. I'm able to turn up timing four degress, 4 DEGREES OF TIMING FROM JUST CHANGING SPARKPLUGS. Course, you're results may vary, yours being intercooled and you're problably not running plugs with 22k miles on them, so it probably won't help as much.

Hmmm... I wonder what kind of 1/4 mile times I could get with no intercooler at 5.5 psi?
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Old 05-22-2000, 09:51 AM   #5
SKiDaZZLe
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I will let you know by the end of the month on the 10-12lbs.

I can't wait for the ACT. I am really excited about getting 1.7 60 foot times

I have the NGK 5's in now (only about 2K miles on them.) I might go to 7's when I turn up the boost.

Only one way to find out what the car will do at the track... The temperature when I ran was about 85 degrees, and 80% humidity...

Good luck,

Michael
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Old 05-22-2000, 09:56 AM   #6
SKiDaZZLe
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Lightbulb

i also wanted to tell you my turbo only ran .2 bar (3 lbs) when running the wastegate off of the compressor housing. i am not sure what boost the legacy ran stock, but it should have been higher than 3 lbs. Maybe my actuator spring is too weak? I am not worried about it now.

Tim, do you have a boost controller?

michael
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Old 05-22-2000, 10:36 AM   #7
Tim Prudence
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I don't have a boost controller, just using the stock wastegate off the compressor housing. Mine boosts up to 5.5 lbs which is right were it should be (Legacy turbo ran 7lbs stock with electronic control).

I would get more performance from an electronic boost controller, because it creeps up to 5.5 lbs. It shoots right up to 4.5 but then it seems like the wastegate starts leaking and it takes awhile for that last pound of pressure. So in first and second gear, I never really get full boost because I can't stay in gear long enough. An electronic boost controller should fix that.
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Old 05-22-2000, 10:41 AM   #8
efoo
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pardon my curiosity, but how would you hook up the electronic boost controller? the integral wastegate is mechanical, right, so would you need to disconnect the spring and such, and hook up a solenoid or something to lift the wastegate valve?

I've got a turbo w/ internal wastegate too, and I need to know whether I should invest in an external wastegate instead of just relying on the internal one. But the stock internal wastegate is by default sprung for too much boost I think, so I need to *lower* my boost level, not up it.

-Edwin
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Old 05-22-2000, 10:53 AM   #9
SKiDaZZLe
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efoo:

EBC (electronic boost controllers) use a stepping motor to control the amount of pressure sent to the wastegate actuator. The term electronic refers to the fact that the stepping motor is controlled by a computer instead of a simple bleed-off system like a manual boost controller.

The stepping motor controls how much boost the actuator sees. For example: the car could be running 50 lbs, but the stepping motor only sends 5 lbs to the actuator to open the wastegate.

hope this helps,
michael
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