Re: 383 Moroso 7qt pan - How many quarts to run?
[Re: 69dart]
#2811072
08/20/20 01:16 PM
08/20/20 01:16 PM
|
Joined: Feb 2008
Posts: 714
Central TEXAS!!!!
sr4440
super stock
|
super stock
Joined: Feb 2008
Posts: 714
Central TEXAS!!!!
|
Hot oil always makes more power, it's the hardest variable to control when running a engine on a dyno. You could install a pan heater and try to keep the oil hot.
Joe
Without Data, you’re just another guy with an opinion.
|
|
|
Re: 383 Moroso 7qt pan - How many quarts to run?
[Re: BigBlockGTS]
#2811075
08/20/20 01:39 PM
08/20/20 01:39 PM
|
Joined: Mar 2011
Posts: 3,080
Michigan
A727Tflite
master
|
master
Joined: Mar 2011
Posts: 3,080
Michigan
|
Not an expert but wouldn't more oil make the oil temperature more consistent? I would think that a lower oil level would heat and cool faster. More oil, longer to cool down once hot and longer to heat up once cool. I think most will agree that is a fact. But changing oil levels to control temperature is secondary. You start with the required oil level to satisfy the engine’s need for lubrication. Hotter oil does make more power once it gets to a certain temperature. The easiest way to control consistency in ET regarding oil temperature is understand your particular package and compensate for temperature swings. Go to the starting line with the same water, oil, trans temps the best you can. As for running an engine lower for oil level, lots of Stock Eliminator guys do that for record runs or same class runs where you need a performance advantage. They also run thinner oils for those occasional runs. But they know how low you can go.
Last edited by Transman; 08/20/20 01:43 PM.
|
|
|
Re: 383 Moroso 7qt pan - How many quarts to run?
[Re: 69dart]
#2811163
08/20/20 04:52 PM
08/20/20 04:52 PM
|
Joined: Aug 2011
Posts: 2,861
Pattison Texas
CSK
master
|
master
Joined: Aug 2011
Posts: 2,861
Pattison Texas
|
True - having oil temp the same for every run would be most consistent but its not realistic without a block heater (which is on my winter to do list).
Early rounds its impossible to get the oil temp the same as it will be hot lapping in round 6 or 7.
Issue I'm having is the car will pick up .02 sometime in the late rounds. Problem is I can't pinpoint when it will occur at it.
My dipstick doesnt seat in this block quite as good as the old one (doesnt seat all the way down) so its possible I'm running an extra 1 - 1.5 qts.
I'm thinking 6 quarts might be the sweet spot (not including filter).
ENGINEMASTERS on MOTORTREND TV tested the amount of oil needed on a Big Block chevy on the dyno and the results were crazy. They found running more oil than needed actually caused oil pressure fluctuations. They kept removing quarts until it was crazy low but it actually maintained the best (most stable) oil pressure. They didnt recommend it in a car because the G forces but it was super interesting.
Thats true for a BBC, BUT a BBMopar has block skirting that the oil pan bolts on that is a lot further from the spinning crankshaft.
1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5
|
|
|
Re: 383 Moroso 7qt pan - How many quarts to run?
[Re: 69dart]
#2811171
08/20/20 05:09 PM
08/20/20 05:09 PM
|
Joined: Mar 2011
Posts: 3,080
Michigan
A727Tflite
master
|
master
Joined: Mar 2011
Posts: 3,080
Michigan
|
[
Everything is hotter hot lapping, engine, trans, axle, even wheel bearing grease.
You have a temp gauge I assume for water temp, just hit the oil pan, trans and axle with your IR heat gun bedore and after each run and log it, you should get a handle on things pretty quick, see which are affected most.
Also, no mention of using a windage tray. Any pan where the oil is 6” or closer to the rotating parts should have a tray. Better yet a scrapper.
|
|
|
Re: 383 Moroso 7qt pan - How many quarts to run?
[Re: A727Tflite]
#2811194
08/20/20 06:01 PM
08/20/20 06:01 PM
|
Joined: Aug 2003
Posts: 43,205
Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,205
Bend,OR USA
|
I found that some oils pick up power on a engine dyno when hotter and some don't  Straight 30 Wt., 20/50 ,10/40 and 10/30 will make more power on a engine dyno at or above 160F. 5W20 wt. won't make any more power at 210F than it will at 80 degrees F  that is why I run it 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: 383 Moroso 7qt pan - How many quarts to run?
[Re: 69dart]
#2811297
08/20/20 08:45 PM
08/20/20 08:45 PM
|
Joined: Oct 2007
Posts: 4,206
New York
polyspheric
master
|
master
Joined: Oct 2007
Posts: 4,206
New York
|
VW beetle and Norton twin owners discovered the "more oil is better" error 50 years ago, $$$.
Boffin Emeritus
|
|
|
Re: 383 Moroso 7qt pan - How many quarts to run?
[Re: 69dart]
#2811464
08/21/20 09:43 AM
08/21/20 09:43 AM
|
Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
|
master
Joined: Sep 2014
Posts: 4,457
Washington
|
True - having oil temp the same for every run would be most consistent but its not realistic without a block heater (which is on my winter to do list).
Early rounds its impossible to get the oil temp the same as it will be hot lapping in round 6 or 7.
Issue I'm having is the car will pick up .02 sometime in the late rounds. Problem is I can't pinpoint when it will occur at it.
My dipstick doesnt seat in this block quite as good as the old one (doesnt seat all the way down) so its possible I'm running an extra 1 - 1.5 qts.
I'm thinking 6 quarts might be the sweet spot (not including filter).
ENGINEMASTERS on MOTORTREND TV tested the amount of oil needed on a Big Block chevy on the dyno and the results were crazy. They found running more oil than needed actually caused oil pressure fluctuations. They kept removing quarts until it was crazy low but it actually maintained the best (most stable) oil pressure. They didnt recommend it in a car because the G forces but it was super interesting.
An engine dyno is a static tool. You can find power on the dyno with less oil, but in the car, in a dynamic situation, that little bit of power you found may go away, and you can lose some power if the oil Leben in the pan gets too low. You can start hurting parts as well. Someone above talked about baffles and oil control and that is the biggest factor in how little oil you can use in any given pan. A correctly baffled pan, with a good pick up AND a crank scraper can usually use less oil without an issue. If the pan isn’t baffled correctly, or you are trapping oil in the block and the oil can’t get back to the pan, less oil may make more power on the dyno but less in the car. Controlling engine oil temp when hot lapping is tough. Have you tried different oils to see if a different oil is LESS sensitive to temp changes than the oil you are using now?
Last edited by madscientist; 08/21/20 09:44 AM.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
|
|
|
Re: 383 Moroso 7qt pan - How many quarts to run?
[Re: 69dart]
#2811594
08/21/20 01:31 PM
08/21/20 01:31 PM
|
Joined: May 2005
Posts: 1,030
ohio
67mprfan
super stock
|
super stock
Joined: May 2005
Posts: 1,030
ohio
|
I've run this 383 combo, Powerglide, light car for several years and it had been deadly. Typically running 6.0s and repeating amazing.
I agree very deadly
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
|
|
|
Re: 383 Moroso 7qt pan - How many quarts to run?
[Re: 69dart]
#2812579
08/24/20 01:34 PM
08/24/20 01:34 PM
|
Joined: Aug 2003
Posts: 43,205
Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,205
Bend,OR USA
|
Car was better this weekend.
Ran the semi's at 3am saturday night and made 00shitshow...lol
Holy crap, Batman 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
|
|
