ET difference w/ less oil

69camz28 · 10-12-2009, 03:34 PM

I was curious what type of ET gains can be seen from running with 3 quarts of oil vs 5....Anyone willing to share any gains?

Jeff Lee · 10-12-2009, 08:00 PM

You'll go real fast just before you blow it up! I had what I thought was a "minor" oil consumption problem in my AMX Stocker. The engine was sealed so no dip-stick. And I was lazy. I ran 3 10.500's in a row in D/S weight while local bracket racing. Then I put a rod through the pan. No oil on the track. I took it home, drained the oil. The filter had it's oil and there was about a 3/4 of a quart in the pan.
Normally under great conditions and 5 qts of oil in the pan it would go 10.55 to 10.60. So call it .08 for danger zone oil levels. After that I placed a 1" sight glass in the pan.

Ed Wright · 10-13-2009, 01:25 PM

Quote:

Originally Posted by 69camz28

I was curious what type of ET gains can be seen from running with 3 quarts of oil vs 5....Anyone willing to share any gains?

I hear of people doing that. I'm not that brave.

Tom keedle · 10-13-2009, 05:06 PM

now that an accusump is legal,wouldn't that take care of the issue?

gmonde · 10-13-2009, 06:00 PM

the accusump is there for protection against oil not being at the pick up tube for insurance only ,,i wouldnt make a habit running low oil to gain a few hundreth's or tenth,,engines a way to expensive to be blowing up ,,,,i would run a light oil and keep the engine cool before the pass (less than a hunderd degrees)

gmonde

Mark Callanan · 10-13-2009, 06:33 PM

Quote:

Originally Posted by gmonde

the accusump is there for protection against oil not being at the pick up tube for insurance only ,,i wouldnt make a habit running low oil to gain a few hundreth's or tenth,,engines a way to expensive to be blowing up ,,,,i would run a light oil and keep the engine cool before the pass (less than a hunderd degrees)

gmonde

You run a run with less then 100 water temp?

Michael Beard · 10-13-2009, 06:48 PM

Man! I can't even get to the burnout box under 140 degrees! lol This car doesn't mind the temp, though, particularly with the M1 manifold.

I run CAM2 Blue Blood Racing Oil, 0w30, full-time, even bracket racing, double-entered, hot-lap, you name it. Won 3 out of 4 days at the Div. 2 Bracket Finals this weekend. I find the thinner oil to be more consistent over the course of the day. You can get it right off their website if you're interested.

While I've never run one near as low as Jeff, I know what he's talking about. There's a few hundredths to be gained, but in emergencies only. I run typically run 6qt, but the current setup uses oil. I change it a lot more frequently than my bracket car just because it doesn't have a dipstick.

gmonde · 10-13-2009, 07:38 PM

once the engine is warmed up in the beginning of the day i cool it till the needle sits on the peg,,,start it and coast it up to the staging lanes,,,try to stage at the coolest temp (140 is the normal temp as the tree drops) 160 at the end 1320,,,,,the cooler the better gmonde

Dusty Lowell · 10-14-2009, 05:48 AM

i'd say ice and less oil is worth probably .15-.20 for us on a hot day not so much in this cold weather. ie 50-60 degrees. maybe a tenth at best. I guess it all matters on how much oil you run on the regular, lol.

buzzinhalfdozen · 10-14-2009, 06:27 AM

Unless you're running a stock type oil pan I see no reason to believe there would be an E.T. gain by draining oil from the engine.Basically the only thing you're doing is reducing windage in the crankcase. With a properly designed pan, scraper and if possible windage tray draining oil is only going to hasten the death of your engine. I would opt for some of the ultra low viscosity oils instead, at least you would have a steady supply of lube to the bearings, although it does have the consistency of water, some lube is better than no lube. As far as running the engine "cold" I do that. After fully warming the engine I leave the water pump and fan on till the water temp is ambient, seems to be a little faster, of course you need a pretty effecient cooling system to accomplish this in later rounds. Joe

10-12-2009, 03:34 PM	#1
69camz28 Member Join Date: Sep 2009 Posts: 148 Likes: 1 Liked 1 Time in 1 Post	ET difference w/ less oil I was curious what type of ET gains can be seen from running with 3 quarts of oil vs 5....Anyone willing to share any gains?

10-12-2009, 08:00 PM	#2
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: ET difference w/ less oil You'll go real fast just before you blow it up! I had what I thought was a "minor" oil consumption problem in my AMX Stocker. The engine was sealed so no dip-stick. And I was lazy. I ran 3 10.500's in a row in D/S weight while local bracket racing. Then I put a rod through the pan. No oil on the track. I took it home, drained the oil. The filter had it's oil and there was about a 3/4 of a quart in the pan. Normally under great conditions and 5 qts of oil in the pan it would go 10.55 to 10.60. So call it .08 for danger zone oil levels. After that I placed a 1" sight glass in the pan. __________________ Jeff Lee 7494 D/S '70 AMX

10-13-2009, 05:06 PM	#4
Tom keedle Senior Member Join Date: Dec 2008 Location: Berthoud, Coloraduh Posts: 695 Likes: 13 Liked 8 Times in 7 Posts	Re: ET difference w/ less oil now that an accusump is legal,wouldn't that take care of the issue?

10-13-2009, 06:00 PM	#5
gmonde Senior Member Join Date: Nov 2007 Posts: 615 Likes: 56 Liked 165 Times in 59 Posts	Re: ET difference w/ less oil the accusump is there for protection against oil not being at the pick up tube for insurance only ,,i wouldnt make a habit running low oil to gain a few hundreth's or tenth,,engines a way to expensive to be blowing up ,,,,i would run a light oil and keep the engine cool before the pass (less than a hunderd degrees) gmonde

10-13-2009, 06:48 PM	#7
Michael Beard VIP Member Join Date: Sep 2002 Location: Columbus, OH Posts: 4,060 Likes: 0 Liked 13 Times in 9 Posts	Re: ET difference w/ less oil Man! I can't even get to the burnout box under 140 degrees! lol This car doesn't mind the temp, though, particularly with the M1 manifold. I run CAM2 Blue Blood Racing Oil, 0w30, full-time, even bracket racing, double-entered, hot-lap, you name it. Won 3 out of 4 days at the Div. 2 Bracket Finals this weekend. I find the thinner oil to be more consistent over the course of the day. You can get it right off their website if you're interested. While I've never run one near as low as Jeff, I know what he's talking about. There's a few hundredths to be gained, but in emergencies only. I run typically run 6qt, but the current setup uses oil. I change it a lot more frequently than my bracket car just because it doesn't have a dipstick. __________________ Michael Beard - NHRA/IHRA 3216 S/SS

10-13-2009, 07:38 PM	#8
gmonde Senior Member Join Date: Nov 2007 Posts: 615 Likes: 56 Liked 165 Times in 59 Posts	Re: ET difference w/ less oil once the engine is warmed up in the beginning of the day i cool it till the needle sits on the peg,,,start it and coast it up to the staging lanes,,,try to stage at the coolest temp (140 is the normal temp as the tree drops) 160 at the end 1320,,,,,the cooler the better gmonde

10-14-2009, 05:48 AM	#9
Dusty Lowell Member Join Date: Sep 2004 Location: Kensington, NH Posts: 103 Likes: 0 Liked 0 Times in 0 Posts	Re: ET difference w/ less oil i'd say ice and less oil is worth probably .15-.20 for us on a hot day not so much in this cold weather. ie 50-60 degrees. maybe a tenth at best. I guess it all matters on how much oil you run on the regular, lol. __________________ Dusty Lowell #1773 STK F/SA

10-14-2009, 06:27 AM	#10
buzzinhalfdozen Senior Member Join Date: Sep 2006 Location: Bellevue Ohio Posts: 984 Likes: 0 Liked 11 Times in 8 Posts	Re: ET difference w/ less oil Unless you're running a stock type oil pan I see no reason to believe there would be an E.T. gain by draining oil from the engine.Basically the only thing you're doing is reducing windage in the crankcase. With a properly designed pan, scraper and if possible windage tray draining oil is only going to hasten the death of your engine. I would opt for some of the ultra low viscosity oils instead, at least you would have a steady supply of lube to the bearings, although it does have the consistency of water, some lube is better than no lube. As far as running the engine "cold" I do that. After fully warming the engine I leave the water pump and fan on till the water temp is ambient, seems to be a little faster, of course you need a pretty effecient cooling system to accomplish this in later rounds. Joe __________________ Joe Buchanan SS/BX 3117