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01-26-2006, 01:18 PM | #1 |
Scooby Specialist
Member#: 6119
Join Date: Apr 2001
Chapter/Region:
BAIC
Location: Union City, CA
Vehicle:1999 GM6 RBP |
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
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01-26-2006, 01:49 PM | #2 |
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 |
'98rs?
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01-26-2006, 05:13 PM | #3 |
Scooby Specialist
Member#: 92913
Join Date: Aug 2005
Chapter/Region:
W. Canada
Location: Winnipeg, MB
Vehicle:2005 2.5RS Wagon Crystal Grey Metallic |
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.
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01-27-2006, 02:03 AM | #4 | |
Scooby Specialist
Member#: 6119
Join Date: Apr 2001
Chapter/Region:
BAIC
Location: Union City, CA
Vehicle:1999 GM6 RBP |
Quote:
Feb 1999 Build, PhaseII -Gagan |
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01-31-2006, 02:20 AM | #5 |
Scooby Specialist
Member#: 6119
Join Date: Apr 2001
Chapter/Region:
BAIC
Location: Union City, CA
Vehicle:1999 GM6 RBP |
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 |
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