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Old 04-27-2002, 10:09 PM   #1
Ru fan
Scooby Specialist
 
Member#: 1605
Join Date: Jun 2000
Chapter/Region: NESIC
Location: Middletown, CT USA
Vehicle:
1997 1.8L Brighton
NESIC TrackH0z member#1

Talking Dyno results for a 2.2L

I have a 98 impreza wagon. The clamed hp is 137 at the crank. It is an almost stock drivetrain with the single ehaust port heads. The only mods I have are as follows.
-removed intake scilencer
-JUN FW 12lbs
-ACT clutch
-Stromung S/S axle back Dual tip
I guess the only one that really counts on the dyno is the exhaust.

*Drum roll*

Hp=93.3 @5200 (quickly drops off after 5200)
Tq=111 @3700

What can I say...she is a Dyno Queen!

How do I read the AFR charts? I have no idea what they mean. I heard that NA cars are supposed to have around 12:1 or something like that. I don't really know what that means though. How can I use this data to tune my car?

Later,
Seth E.
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Old 04-28-2002, 09:01 AM   #2
roninscar
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Member#: 2306
Join Date: Sep 2000
Location: Orlando, FL, USA
Vehicle:
2000 RS Sedan
Blue Ridge Pearl

Default AFR

The AFR can tell you how much power is being lost to conservative fuel mapping. The ideal stoichometric(sp?) balance would be 14.7 to 1, but this is pretty dangerous and extra fuel is added in order to keep the engine from running too lean and looking for other fuel sources to burn, stuff like pistons, valves etc. So lowering the ratio will help keep exhaust temps down and keep from burning pistons, but it will suck some performance from the beast as you are not combusting near peak efficiency.

Do a search on fuel controllers, there should be a discussion there on a method used by some RS owners to raise the ratio in the higher revs to increase power. The stock maps typically have the afr diving in the higher revs.

Regards,
scotto
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Old 04-28-2002, 05:34 PM   #3
Tkacik
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Member#: 847
Join Date: Feb 2000
Chapter/Region: South East
Location: Greensboro, Georgia
Vehicle:
'06 Titan Crew Cab
'08 Forester LL Bean

Default

Wow those are pretty impressive numbers.
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Old 04-28-2002, 05:47 PM   #4
Kevin Thomas
Street Racing Instructor
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Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

Default Charts

Seth,

Will you be posting a scanned pic of the dyno chart itself? Then we can see details as to how the powerband is.
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Old 04-28-2002, 09:28 PM   #5
Ru fan
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Member#: 1605
Join Date: Jun 2000
Chapter/Region: NESIC
Location: Middletown, CT USA
Vehicle:
1997 1.8L Brighton
NESIC TrackH0z member#1

Arrow

I can't post the charts because of the size. I can't compress the charts because I don't have the software. I will see what I can do though. Give me a few days, maybe I can figure something out.
<---Doesn't know shiznit about computers

Later,
Seth E.
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Old 04-28-2002, 09:58 PM   #6
MGXsport
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Chapter/Region: NWIC
Location: Coulee City
Vehicle:
2013 Outback

Default

I'd like to see the chart also.

<----

You can get a good image resizer for free at downloads.com

Search for Ifran View.

Chris
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