posted
Saw this taken from a news release quoted on CZ28.com about changes for the GenIV architecture and it made me go Hmmm.
quote: Redesigned crankcase vent: The crankcase vent is repositioned to the top of the block valley, where oil is less likely to enter during high engine speeds or high-g maneuvers.
During the track day at Brainerd I was smoking (burning oil) in and immediately following right hand turns. I was definitely encountering high engine speeds and g's.
I attributed the smoking to a slight oil overfill, too low a viscosity (5W-30) for the conditions and a motor that may be a little more tired than I'd hoped. The quote, and other discussions on the PCV system has me thinking there may be more to it.
The motor is internally stock, with PPC headers, no cats, and EGR and AIR deleted. It hasn't been tuned yet.
The motor feels strong, and the fellow in the M5 said I wasn't holding him up.
Any thoughts or suggestions?
Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000
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posted
The PCV has been as issue for a while. There was that catch can filter fix, I recall. Try a search for info on www.ls1tech.com I find some useful stuff there from time to time.
Any thoughts on doing the fall Skyline run this year?
-------------------- Hawkeye: SSOA F98-C98
1998 SS - Black All Options - Mods Whisper Lid, K & N, Lou's Short Stick, Shift Light, Skip Shift, SLP Y, Borla, 4:10's, BMR STB, SLP SFCs, Granatelli MAF, Hypertech III, 160 Stat, Mallory Billet Pedals, Metco Aluminum LCAs,Fast Toys Ram Air Mod, Spohn Panhard Bar, BMR Torque Arm, free EGR mod,power antenna, BMR LCA brackets, Gentex Temp/Compass Auto Dim Mirror, AllMaxx Strobe and Wig Wag, BAER Eradispeed rotors,PPC Headers with Random Technology Hi Flow Cats, BMR Drive shaft Loop,FAST 78MM Throttle Body, FAST 78MM Composite Intake, Mobil 1 & lots of Zaino.
Wife & Best Friend Mary - copilot. Posts: 5558 | From: Windsor, Ontario. Canada | Registered: Feb 2000
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quote:Originally posted by Hawkeye: Any thoughts on doing the fall Skyline run this year?
Negative on Skyline. We're using up the balance of our holidays for the trip to Mexico in August. Bowling Green got bumped as well Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000
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posted
Oh no.....PoSSum is going hhhmmmm again. The last time he did that he was chasing suspensuion gremlins. PoSSum how did that go. Get rid of them?
As far as the burning oil goes, this is a topic that I have not paid much attention to. But my '98 burns oil during lapping and solo I events but not on the street.
From what I understand part of the problem is that oil does not drain back fast enough from the heads under high RPM and the vacuum pick up is in a bad location. The result is "slurp".
GM attempted to fix this problem with the LS6....as you noted. Also, one of the things that the catch can mod does is to restrict the amount of vacuum to the heads/vally area.
This was recently discussed in the Great Lakes forum on LS2.com with a friends car. He put an LS6 intake on his engine, and it was/is using a lot of oil. The PCV system was disconnected and oil consumption went way down. He apparently is now looking at the catch can mod.
Good luck.
Posts: 383 | From: Oakville, Ontario Canada | Registered: Jan 2003
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quote:Originally posted by Bill Mason: .... he was chasing suspensuion gremlins. PoSSum how did that go. Get rid of them?
I think the major front end stuff is sorted out. The next autoX will hopefully confirm that. I suspect I'll be looking at the bump steer issue sooner than later though.
Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000
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posted
I have an assembled catch can mod, but have not installed it, as mine does not use much oil. poSSum - you interested in it?
-------------------- Hawkeye: SSOA F98-C98
1998 SS - Black All Options - Mods Whisper Lid, K & N, Lou's Short Stick, Shift Light, Skip Shift, SLP Y, Borla, 4:10's, BMR STB, SLP SFCs, Granatelli MAF, Hypertech III, 160 Stat, Mallory Billet Pedals, Metco Aluminum LCAs,Fast Toys Ram Air Mod, Spohn Panhard Bar, BMR Torque Arm, free EGR mod,power antenna, BMR LCA brackets, Gentex Temp/Compass Auto Dim Mirror, AllMaxx Strobe and Wig Wag, BAER Eradispeed rotors,PPC Headers with Random Technology Hi Flow Cats, BMR Drive shaft Loop,FAST 78MM Throttle Body, FAST 78MM Composite Intake, Mobil 1 & lots of Zaino.
Wife & Best Friend Mary - copilot. Posts: 5558 | From: Windsor, Ontario. Canada | Registered: Feb 2000
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posted
I've always wondered if a set of tall valve covers would help this problem. But with them going for a few hundred dollars and the need for a coil relocation kit. I will never personally find out. Posts: 465 | From: B'ham, AL | Registered: Sep 2000
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quote:Originally posted by Hawkeye: I have an assembled catch can mod, but have not installed it, as mine does not use much oil. poSSum - you interested in it?
If you're not planning on using it I'd be interested.
Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000
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May not be the total cure, but it gets the PCV off of the valve cover . . . .
-------------------- My Cars: 2000 Bright Rally Red Camaro SS Convertible 2002 Electron Metallic Blue Berger SS T-Top 2004 Silver Birch Metallic Silverado 2500HD Duramax Ext. Cab. S.B. 4x4
posted
So are you going to disconnect the PCV system for the next autoX and see if she still smokes?
Posts: 383 | From: Oakville, Ontario Canada | Registered: Jan 2003
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