Clearly ls3's make horrible race motors
11-20-2009, 09:21 AM
#1
Burning Brakes
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Clearly ls3's make horrible race motors
After hearing some words about how the ls3 is a horrible race motor (because of the oiling issues i guess), I found it funny to see this.
Looks like LMPC/FLMS is using ls3's on all their cars....
http://www.autoblog.com/2009/11/19/f...e-mans-series/
Looks like LMPC/FLMS is using ls3's on all their cars....
http://www.autoblog.com/2009/11/19/f...e-mans-series/
11-20-2009, 09:57 AM
#3
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I've been spending most of my time working on my antique big block. Can someone give me a simple description of the differences between all the LSx engines?
TIA
TIA
11-20-2009, 09:58 AM
#4
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Plus oil cooler, bigger radiators and stock cam, then no problems.
it is the dry sump that makes the difference.
Plus LS3s are cheap compared to built race motors. Blow one up and just buy another
it is the dry sump that makes the difference.
Plus LS3s are cheap compared to built race motors. Blow one up and just buy another
11-20-2009, 11:39 AM
#5
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St. Jude Donor '08
11-20-2009, 12:54 PM
#6
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
They were testing that car at Road Atlanta on Monday after the mud and river fest we had to work with.
Car ran good, and sounds really cool compared to some of the other LMP cars.
A dry sump takes care of a lot of the issues, and a real dry sump at that, not the LS7 'sump'. I do not believe these are 100% crate engines either. I know the one in the ALMS car sure as heck isn't.
Car ran good, and sounds really cool compared to some of the other LMP cars.
A dry sump takes care of a lot of the issues, and a real dry sump at that, not the LS7 'sump'. I do not believe these are 100% crate engines either. I know the one in the ALMS car sure as heck isn't.
11-20-2009, 01:16 PM
#7
Melting Slicks
Yep, so far I've run my sumped LS3 at VIR and Road Atlanta...with an oil cooler the size of my dining room table...and the pressure and temps have been really good.
11-20-2009, 02:40 PM
#9
Melting Slicks
11-20-2009, 07:57 PM
#11
Burning Brakes
Just put a real dry sump system on the LS3, add some crazy engine management, and poof, you got yourself one of those fancy le mans formula things. 
But nah, the LS engines are outstanding once when the oil problems are squared away.
But nah, the LS engines are outstanding once when the oil problems are squared away.
11-21-2009, 07:22 AM
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two piece --> SS --> LS6 style valves ( hollow and Sodium filled)
Going to the Light wt valve helped with the lifter issue.
also with the bigger cubes, keeping the RPM down 6500 or less
11-21-2009, 08:23 PM
#15
Do you know when these valve changes occurred?
11-22-2009, 12:01 AM
#16
Burning Brakes
oil starvation due to G's
OK, I am considering installing better oil lubrication on my LS3 but don't have the money to go to a "good" dry sump. I am hoping to hear from anyone out there that has installed an accusump. Does the addition of this actually help prevent the oil starvation on the corners of the tracks? I know most serious trackers will say to go with a proper dry sump, but I can't spend that kind of money now. So far the only changes I have made to my car is to put on Pfadt street sway bars and I added a Z06 oil cooler. Plus each time before I go to the track, I change out wheels/tires & brake pads. I have been enjoying tracking my '08 C6 M F55 six to eight days a year in HPDE 4. I only drive this on the weekends and want to keep it fairly comfortable for the road. I guess if I were to get to a point where I only drive this on the track, I should replace it with something like an '04 Z06, but I am trying to do all I can not to get there. So.... does installing the battery in the trunk and putting a 2 or 3 quart accusump make sense?
11-22-2009, 12:43 PM
#19
Safety Car
T2 @ Thunderhill will easily put you at 1.2g; you might even pull it off with street rubber. My data shows ~1.2g sustained on R888s... and that's just out for a nice ride at an HPDE.
