Welcome to the North American Subaru Impreza Owners Club Monday March 18, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-26-2006, 01:18 PM   #1
joltdudeuc
Scooby Specialist
 
Member#: 6119
Join Date: Apr 2001
Chapter/Region: BAIC
Location: Union City, CA
Vehicle:
1999 GM6
RBP

Default Heads up on my status

Car is good order still. Still no CEL on the headers. Intake works greeat. S-AFC2 was wired in early Jan. EGT and Oil Pressure Gauges are getting put in on 28th.

Car goes in for tuning on 30th after work. We'll see what she makes yet.

Yesterday did Timing belt, water pump, thermostat, valve adjustment and related seals and gaskets, as well as new valvecover gaskets.

The intake valves were off, no surprise at 160k. The exhaust valves were tight, which is also typical of our motors. Adjustment yeilded a much crisper engine and throttle response. I did note a slight drop in max amount of air the engine was pulling past the MAF on the SAFC unit, but that doesn't really matter, it was a small drop. The feels sharp from the low and mid, and the same top end. He loosened the exhaust valves slightly, since these tighten over time, and our motors tend to have sticktion issues when adjustment is not done, leading to burnt valves and stuck valves.

Compression test put out 215 on all 4 cylinders, which is ****ing way healther than I imagined. The short block as 100k on it. I was told though, that by now there is a small amound of carbon deposit on the pistons, and that helps the compression numbers slightly.

Over all Adam at LIC Motorsports says that he's rather impressed with the motor, since he knows I beat this car to the ground and race it competitvely. I'm rather impressed myself that it's even that healthy at all.

I'll be keeping watch for headgasket failure. It seems it's the only thing that may take this motor down, otherwise it's as healthy as can be.

I'lll have a thread up when I get home from tuning on Monday night. Should have the dyno charts up by about 8/9pm Pacific.

-Gagan
* Registered users of the site do not see these ads.
joltdudeuc is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-26-2006, 01:49 PM   #2
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

'98rs?
Matt Monson is offline   Reply With Quote
Old 01-26-2006, 05:13 PM   #3
FalconRS
Scooby Specialist
 
Member#: 92913
Join Date: Aug 2005
Chapter/Region: W. Canada
Location: Winnipeg, MB
Vehicle:
2005 2.5RS Wagon
Crystal Grey Metallic

Default

Geez Gagan, you're proving all kindsa stuff, not the least of which is the durability of the EJ25 with mods and driven like a sporty car SHOULD be stolen. Nice work dude.
FalconRS is offline   Reply With Quote
Old 01-27-2006, 02:03 AM   #4
joltdudeuc
Scooby Specialist
 
Member#: 6119
Join Date: Apr 2001
Chapter/Region: BAIC
Location: Union City, CA
Vehicle:
1999 GM6
RBP

Default

Quote:
Originally Posted by Matt Monson
'98rs?
'99

Feb 1999 Build, PhaseII

-Gagan
joltdudeuc is offline   Reply With Quote
Old 01-31-2006, 02:20 AM   #5
joltdudeuc
Scooby Specialist
 
Member#: 6119
Join Date: Apr 2001
Chapter/Region: BAIC
Location: Union City, CA
Vehicle:
1999 GM6
RBP

Default

I'll put the dyno charts up tomorrow if I can. Nothing to boast about, I need to figure out what went wrong.

I LOST POWER!

So either the safc install has stolen precious voltage which is screwing the sensor readings or my valve adjustment has killed my power output.

So the car without any fuel adjustment, today, put down about 6hp and 8ftlbs of toque less than last time before the valve adjustment and the safc install.

ALSO, the AFR changed DRASTICALLY... Where last time it dived to 12.1, this time it hit 12.6, but at 5500rpm is SHOT UP to like 14.9 by redline!!!

Mike at Gruppe-S says that what the ECU is most like doing right now is pulling the timing back, since the now leaner numbers SHOULD be making more power, and they are not. He added fuel and the power went down, and took some fuel out and the power went up, and played around but only get like 4hp and 4ftlbs of torque back...

A sad day, but I will find out what the hell is up. He suggested I disconnect the safc, but I want to see if i the data log from tomorrow shows this timing change first.

Oh and when he pulled some fuel out, the car KNOCKED about 3 or 4 times, so he zeroed the adjustment and we called it a night.

Don't worry though, I'll find out what's up, and what I plan to do. Although if the tightening the intake valves was this big of a power drop then I've dug myself a hole.

Could be that the ECU isn't comfortable advancing timing yet, and is still learning... I'll try a few things and get back to you guys.

-Gagan
joltdudeuc is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Here's a heads up on the Red Cross... BigElm General Community 3 11-07-2001 02:04 PM
Heading up on Sat with Goodies vividracing South West Impreza Club Forum -- SWIC 5 10-04-2001 08:19 PM
heads up on a possible Prodrive/SOA event in Burlington, VT ^jynx^ Tri-State Area Forum 0 09-27-2001 10:55 PM
Heads up on I295 (mostly south & central jersey) Samirr76 Tri-State Area Forum 7 05-29-2001 02:33 PM

All times are GMT -4. The time now is 11:08 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.