Small block oil pressure
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Small block oil pressure
Guys, got the picture below from the Scoggin-Dickey catalog. Not that you'd ever want to leave the plug out, but how can it affect oil pressure?
Last edited by Mike_B; Oct 1, 2007 at 12:12 PM. Reason: smaller pic
Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
If you stop and look at the pic and see hoe the oil flows its not hard to figue out, WHAT IS STOPPING THE ENGINE FROM OIL PRESSURE!!!! All it does is bypass the filter once its full.
I can tell by this post youR not an engine builder with info posted like this,
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Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Hate to inform you but don't believe all you read, After 27 years of building performance engines we have ahd engines in the shop from other engine builders without that plug installed and there was oil pressure but the bearings saw unfiltered oil.
If you stop and look at the pic and see hoe the oil flows its not hard to figue out, WHAT IS STOPPING THE ENGINE FROM OIL PRESSURE!!!! All it does is bypass the filter once its full.
I can tell by this post youR not an engine builder with info posted like this,
RACE ON
If you stop and look at the pic and see hoe the oil flows its not hard to figue out, WHAT IS STOPPING THE ENGINE FROM OIL PRESSURE!!!! All it does is bypass the filter once its full.
I can tell by this post youR not an engine builder with info posted like this,
RACE ON
Looking at the picture, I agree it doesn't appear that leaving the plug out would keep oil pressure from building.
And you are correct, that I am not a PROFESSIONAL, full time engine builder. However, I have built my share of engines, and over a period of greater than your 27 years. It is just that *I* haven't put any together with out that plug to observe the consequences first hand. If you noticed, in my first post, I credited "Chevrolet Power", Chevy's own engine book with the information I posted. Here is the page the info came from. Besides the illustration caption, read the last full paragraph in the left column, above the pic, starting with the word "When". If you wish to debate, take it up with Chevrolet Motor Division.
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Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
I don't believe everything I read, however, I do place greater faith in what Chevrolet writes about their own engine than I do in other less reliable sources.
Looking at the picture, I agree it doesn't appear that leaving the plug out would keep oil pressure from building.
And you are correct, that I am not a PROFESSIONAL, full time engine builder. However, I have built my share of engines, and over a period of greater than your 27 years. It is just that *I* haven't put any together with out that plug to observe the consequences first hand. If you noticed, in my first post, I credited "Chevrolet Power", Chevy's own engine book with the information I posted. Here is the page the info came from. Besides the illustration caption, read the last full paragraph in the left column, above the pic, starting with the word "When". If you wish to debate, take it up with Chevrolet Motor Division.
RACE ON!!!
Looking at the picture, I agree it doesn't appear that leaving the plug out would keep oil pressure from building.
And you are correct, that I am not a PROFESSIONAL, full time engine builder. However, I have built my share of engines, and over a period of greater than your 27 years. It is just that *I* haven't put any together with out that plug to observe the consequences first hand. If you noticed, in my first post, I credited "Chevrolet Power", Chevy's own engine book with the information I posted. Here is the page the info came from. Besides the illustration caption, read the last full paragraph in the left column, above the pic, starting with the word "When". If you wish to debate, take it up with Chevrolet Motor Division.
RACE ON!!!
For sure its a type O as where can the oil pressure go. I have seen this posted before and myself and other engine builders have corrected people that post such a statement, The debate is with you not Cheverolet Motor Division as you posted here not them.
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Originally Posted by BLOCKMAN
For sure its a type O as where can the oil pressure go.
Originally Posted by BLOCKMAN
I have seen this posted before and myself and other engine builders have corrected people that post such a statement, The debate is with you not Cheverolet Motor Division as you posted here not them.
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Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
A thx to Blockman for clearing this up.
I would have to say Blockman gave us the good information regardless of acusations of his capabilities. Quoting bad information does no-one any good and i question anyones comprehension that does it
Thx to Blockman for his efforts sharing his knowlege and experience here. I think others have good information to share also but don't care to deal with a bashing over trivia.
cardo0
Thx to Blockman for his efforts sharing his knowlege and experience here. I think others have good information to share also but don't care to deal with a bashing over trivia.
cardo0
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Drifting
Joined: Dec 2005
Posts: 1,360
Likes: 3
From: NORTHEAST
It may be a mistake, or an error on Chevy's part, but a typo doesn't show both in the text and in the caption.
Apparently, either you didn't read what I posted or your comprehensive capabilities are low. I made the statement on behalf of Chevy. To repeat, I said (scan up and look) "As per "Chevrolet Power".
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Apparently, either you didn't read what I posted or your comprehensive capabilities are low. I made the statement on behalf of Chevy. To repeat, I said (scan up and look) "As per "Chevrolet Power".
RACE ON!!!
And that has been posted many times on other sites about that misprint.
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Racer
Joined: Jul 2006
Posts: 447
Likes: 0
From: San Jose Ca
IF you all want to be technical. It DOES have an effect on pressure. Once you remeber that the filter (minimally restrictive as it is), does indeed have a parasitic loss.
However the manual page that CFI-EFI posted is INCORRECT.
And I will again say. It has 2 effects. A slight oil pressure change (again by removing a parasitic device from it's chain) and a non-filtration issue. However the technical people can say it has a HP gain, by minimizing parasitic loss.
However the manual page that CFI-EFI posted is INCORRECT.
And I will again say. It has 2 effects. A slight oil pressure change (again by removing a parasitic device from it's chain) and a non-filtration issue. However the technical people can say it has a HP gain, by minimizing parasitic loss.
