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Old 06-02-2013, 05:54 PM   #1
braz28
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Default windage tray for dart little M with oilling problems

Looking for ideas for dropping oil pressure on a dart little M with a 4 inch stroke;

Engine as 65lbs idle pressure when cold and drops to 20 hot, climbs to 45lbs over 2500 rpm's and remains at 45 lbs up to redline. If engine is kept full throttle more then a few seconds oil pressure drops dramatically (30lbs or lesss)

current oil pan is a louvered 8 quart Champ pans, Melling m55 oil pump, Comp cams solid roller camshaft and lifters,

As per Darts recommendations,Block Oilling is wet sump with rear 1/4 plugs plugged off and fronts unplugged.

any suggestions if a windage tray would at least help with the dropping pressure under acceleration? if so, who sells a windage tray for my setup?

thanks
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Old 06-02-2013, 06:32 PM   #2
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Default Re: windage tray for dart little M with oilling problems

I do not think that is your issue. Sounds like the pickup is sucking air to me. I run a little M 421 with no windage tray without these issue's.
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Old 06-02-2013, 06:41 PM   #3
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Default Re: windage tray for dart little M with oilling problems

I'm using a Milodon 31170 pan with the integral windage tray on my SBC but it's in an altered, don't know if it will fit in yours and I'm using the same oil pump. My oil pressure at idle is around 80 psi and goes up over 100 psi at higher rpm.

What are your bearing clearances and what weight oil are you using?
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Old 06-02-2013, 07:41 PM   #4
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Default Re: windage tray for dart little M with oilling problems

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Originally Posted by Draw3D View Post
I'm using a Milodon 31170 pan with the integral windage tray on my SBC but it's in an altered, don't know if it will fit in yours and I'm using the same oil pump. My oil pressure at idle is around 80 psi and goes up over 100 psi at higher rpm.

What are your bearing clearances and what weight oil are you using?
I tried a few different weight oils (5w30,10w30,20w50) with same results.
rod clearance .0015
main clearance .0020
rod side clearance .024

oil pick up was supplied by Champ pans.
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Old 06-02-2013, 07:43 PM   #5
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Default Re: windage tray for dart little M with oilling problems

ive heard reducing amount of oil in the oil pan...should I try 6 or 7 quarts instead of 8?
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Old 06-02-2013, 08:52 PM   #6
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Default Re: windage tray for dart little M with oilling problems

More than likeley your pick up is cracked . Or the pressure bypass spring is broken in the pump.
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Old 06-02-2013, 09:22 PM   #7
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Default Re: windage tray for dart little M with oilling problems

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Originally Posted by braz28 View Post
ive heard reducing amount of oil in the oil pan...should I try 6 or 7 quarts instead of 8?
Would be curious to see the specs on your oil pan. Most SBC pans aren't made for 8qts. I run 6 in my moroso SBC. I agree with the others that the amount of oil isint the issue. But 8qts in a SBC is a lot, so once you figure out your other iissues, you could have a serious windage issue.
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Old 06-02-2013, 09:59 PM   #8
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Default Re: windage tray for dart little M with oilling problems

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Originally Posted by fastman-99 View Post
Would be curious to see the specs on your oil pan. Most SBC pans aren't made for 8qts. I run 6 in my moroso SBC. I agree with the others that the amount of oil isint the issue. But 8qts in a SBC is a lot, so once you figure out your other iissues, you could have a serious windage issue.
manufacturers description http://www.champpans.com/index.cfm?e...ctdetail&id=80

your opinions are all greatly appreciated, keep 'em coming
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Old 06-02-2013, 10:16 PM   #9
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Default Re: windage tray for dart little M with oilling problems

I have seen similar pans ran with 6QTS total. It is interesting to do research on oil pans though. The moroso pan I have is made by everyone. ie... Steffs, Milidon, etc... And they all recommend different oil amounts, anywhere from 6qts total, to 8qts plus the filter. I would think they rate them high because they don't want to be responsible for you spinning a bearing etc... IMHO I think 6 is more than enough for that pan you have.
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Old 06-02-2013, 10:24 PM   #10
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Default Re: windage tray for dart little M with oilling problems

i run 5 qts in mine..
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Old 06-02-2013, 11:28 PM   #11
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Default Re: windage tray for dart little M with oilling problems

Never heard of Champ pans, are the baffles setup for front end rise/fall instead of lateral like roundy-rounds use? Reading the Champ link, it states 8 quarts including filter.

Also, on my Milodon pan, they recommend 1/4" to 3/8" gap between pan and pickup, a pickup too close or riding the pan could cause oil pressure problems.
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Old 06-02-2013, 11:33 PM   #12
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Default Re: windage tray for dart little M with oilling problems

Take the bypass at the oil filter off, I used a canton solid replacement, and a moroso oil filter helped my pressure drop going down track. Also I ran 1 litre less oil( 6 total including filter)

Last edited by stevef; 06-02-2013 at 11:34 PM.
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Old 06-03-2013, 12:00 AM   #13
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Default Re: windage tray for dart little M with oilling problems

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Originally Posted by stevef View Post
Take the bypass at the oil filter off, I used a canton solid replacement, and a moroso oil filter helped my pressure drop going down track. Also I ran 1 litre less oil( 6 total including filter)
im going to give this a try tomorrow evening, what is the best way to plug the bypass? if I get a positive result... I will order a quality race part
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Old 06-03-2013, 01:31 AM   #14
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Default Re: windage tray for dart little M with oilling problems

I should have mentioned. I use to run a similar pan to that. Exterior looked the same, cant speak for the internals of it, cuz I cant see any pix of that one on there site. But I ran it at 7 qts including filter, and my engine builder said I ran it overfull as well. I never did lower it to 6, but with my new "better" pan I did lower to 6qts
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Old 06-03-2013, 01:38 AM   #15
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Default Re: windage tray for dart little M with oilling problems

You have something going on. I'd fix it before you tear something up. The sound of your problem is one of a more serious nature. Pickup tube/pump problem. Not pumping oil properly or you have a big leak somewhere. Oil level in that pan isn't going to do what you are experiencing.
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