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#8 (3/8" ID) lines big enough for lines to engine oil cooler?
I recently got a DeWitt radiator w/ a built-in engine oil cooler. Tom DeWitt had told me that radiator's oil line fittings were #10 AN. But alas he was mistaken, they are only #8. Will this be large enough to assure adequate oil flow? The lines exit and return to the oil filter adapter. The engine is a modified LT1, blue printed oil pump (not high volume), Canton RR pan, enhanced oil return, etc. I don't have an Accusump yet but plan to add one.
Ahh, the same old line sizing debate. The confusion starts with a misunderstanding of fitting types and styles.
The ports on the actual cooler is a female SAE straight thread, which is very common in the industrial hydraulic sector. An SAE #8 uses a 3/4-16 size/thread. You need to install a fitting with a #8 SAE male on one end to a #10 AN on the other. Here is one...
You will note the #8 SAE end is actually larger than the #10 AN, and the bore hole through is the same.
Correct line sizing is important but correctly sizing the devices is 10X more important. That is why we use such a large, low pressure drop, oil cooler.
Last edited by Tom DeWitt; 02-01-2007 at 07:56 PM.
Tom - is the side pan tranny cooler good enough to plumb engine oil to? I have it on my aluminum C-3 radiator, but I have a manual tranny
The EOC and TOC are designed differently inside and that is why the huge lines sizes have become the standard today. You see, many companies started out using TOC's for EOC's and they found out the pressure drops were very high, which they're sapposed to be for high pressure transmission oil. In an attempt to fix this problem a lot of people increased the hoses, which might drop it 3-5 psi, when the cooler is pushing 15-20 psi deltaP. So, the answer is no, I wouldn't do it because they just aren't designed for that.
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Tom, your replies here, in a thread addressed to you and a couple of others I've run across have been a wealth of information. Thanks a bunch, I will now proceed with confidence.
For adequate oil flow/pressure #10 is preferred. I "personally" wouldnt run #8's.
You can have flow or pressure, but not both. Same things are you can suck or blow, but not both. GM currently uses -8an size line for all their truck oil coolers, are you saying they got it wrong?
Keith
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GM currently uses -8an size line for all their truck oil coolers, are you saying they got it wrong? Keith
Thank you I think we tend to overthink and overdue some stuff and no matter how much I try to explain the line sizing most people just do something else. GM usually has it right and they set a good guide line when making decision on this stuff.
Quote:
Originally Posted by kromberg
You can have flow or pressure, but not both. Same things are you can suck or blow, but not both.
Unfortunately I have to disagree here. I worked in industrial hydraulics for twenty five years I know more about this stuff than I do cooling. Pressure is actually created when you have resistance to flow. Without flow, you can't create pressure and conversely without resistance you cannot have pressure. The garden hose is the easiest example to explain this. When you turn on the hose you have flow but very little pressure and the stream is 8" long. Then you slide your thumb over the end and the stream goes ten feet long and that's because you created resistance to the flow and the pressure increased. Same flow rate, higher pressure.
Last edited by Tom DeWitt; 02-28-2007 at 08:39 PM.
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#8 (3/8" ID) lines big enough for lines to engine oil cooler?
Unfortunately I have to disagree here. I worked in industrial hydraulics for twenty five years I know more about this stuff than I do cooling. Pressure is actually created when you have resistance to flow. Without flow, you can't create pressure and conversely without resistance you cannot have pressure. The garden hose is the easiest example to explain this. When you turn on the hose you have flow but very little pressure and the stream is 8" long. Then you slide your thumb over the end and the stream goes ten feet long and that's because you created resistance to the flow and the pressure increased. Same flow rate, higher pressure.
