|
Re: racing oil
[Re: 340B5]
#1715875
12/27/14 01:20 PM
12/27/14 01:20 PM
|
Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
|
I Win
Joined: Jan 2003
Posts: 32,394
|
Quote:
Quote:
Quote:
Quote:
Quote:
Synthetic is great for Rollers but it can wipe a flat tappet.
I don't think so, just saying 
A true synthetic is slick enough that the lifters can quit rotating.
You`re kidding right? 
No
you better tell that to all the flat tappet cams i have run with a true sythetic 
|
|
|
Re: racing oil
[Re: 340B5]
#1715876
12/27/14 02:02 PM
12/27/14 02:02 PM
|
Joined: Mar 2006
Posts: 9,839
MI, usa
dvw
master
|
master
Joined: Mar 2006
Posts: 9,839
MI, usa
|
Quote:
Quote:
Quote:
Quote:
Quote:
Synthetic is great for Rollers but it can wipe a flat tappet.
I don't think so, just saying
A true synthetic is slick enough that the lifters can quit rotating.
Lifter rotation is caused by taper in the lobes face. I doubt if less friction would cause lack of rotation. That being said. I've built 2 customer motors that were long term builds, 7 years BB Mopar, 13 years SB Chevy. Both had mild .500" lift hydraulic cams. Both used Mobil One. Both sit for long periods of time. Both had hydraulic flat tappet cam failures. My theory is possibly most of the oil drained of the cam. Neither were idled fast after long term start up. Therefore minimal oil splash to the cam. Only a theory. I do run Mobil one in my solid flat tappet motor w/o issue.
Doug
You`re kidding right?
No
|
|
|
Re: racing oil
[Re: BradH]
#1715877
12/27/14 02:15 PM
12/27/14 02:15 PM
|
Joined: Aug 2003
Posts: 1,313
Charlotte, NC
LSP
pro stock
|
pro stock
Joined: Aug 2003
Posts: 1,313
Charlotte, NC
|
Quote:
I can tell from some of these posts that my thoughts / philosophies re: oil weights, clearance #s, etc. are really different from some of the people on here. No point in going into any details, since it'll just end up in another MoPissin' Contest.
Don't worry about someone having a different take on things. Whether anyone agrees or not, there's usually something that can be learned good or bad, or a statement might be made that can provoke more in-depth thought on the subject.
|
|
|
Re: racing oil
[Re: AndyF]
#1715878
12/27/14 03:06 PM
12/27/14 03:06 PM
|
Joined: Mar 2006
Posts: 9,839
MI, usa
dvw
master
|
master
Joined: Mar 2006
Posts: 9,839
MI, usa
|
Quote:
160 is fairly cold for oil temp so need to run the lighter weight oil.
I run Royal Purple XPR 5W-30 in my dyno engine. We try to get the oil temp up to 200 degrees but it is almost impossible to do even with a big heater in the oil tank. My oil lines are insulated which helps but the oil still cools off really fast. My engine will hold 80 psi at speed but at idle it drops down to about 30 psi hot.
I agree. Even with a diaper on my aluminum pan it's difficult to get oil temp. I bring the water to 200 before a run let it soak, then cool the water to 140 before the run. I've been thinking about a pan heater. Mine will have 100+psi cold. Warm 20-30 at idle depending on oil temp, always 60 in the traps after 120 degrees. I've run as low as 40 in the traps with no bearing issue. I was to chicken to leave it that low.
Doug
|
|
|
Re: racing oil
[Re: BradH]
#1715879
12/27/14 06:32 PM
12/27/14 06:32 PM
|
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
@#$%&*!
New user name, Same old jerk!
|
New user name, Same old jerk!
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
|
Quote:
I can tell from some of these posts that my thoughts / philosophies re: oil weights, clearance #s, etc. are really different from some of the people on here. No point in going into any details, since it'll just end up in another MoPissin' Contest.
Don't hold out, let 'er rip! I promise to back you up whatever you say as long as you don't refer to oil viscosity as 'weight.'
The stupid parts stores around here only shelf-stock VR1 Racing in 50 or 20-50  I got my latest supply from Amazon with a substantial rebate.
|
|
|
Re: racing oil
[Re: @#$%&*!]
#1715880
12/27/14 08:36 PM
12/27/14 08:36 PM
|
Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
|
I Win
Joined: Jan 2003
Posts: 32,394
|
Quote:
Quote:
I can tell from some of these posts that my thoughts / philosophies re: oil weights, clearance #s, etc. are really different from some of the people on here. No point in going into any details, since it'll just end up in another MoPissin' Contest.
Don't hold out, let 'er rip! I promise to back you up whatever you say as long as you don't refer to oil viscosity as 'weight.'thats just the way did it back then
The stupid parts stores around here only shelf-stock VR1 Racing in 50 or 20-50 I got my latest supply from Amazon with a substantial rebate.
who cares what someone calls it as long as you know what they are talking about? i call it weight all the time and don't care if it's the politically correct name
|
|
|
Re: racing oil
[Re: Quicktree]
#1715883
12/28/14 12:14 AM
12/28/14 12:14 AM
|
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
@#$%&*!
New user name, Same old jerk!
|
New user name, Same old jerk!
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
|
Quote:
Don't hold out, let 'er rip! I promise to back you up whatever you say as long as you don't refer to oil viscosity as 'weight.'thats just the way did it back then
The stupid parts stores around here only shelf-stock VR1 Racing in 50 or 20-50 I got my latest supply from Amazon with a substantial rebate.
who cares what someone calls it as long as you know what they are talking about? i call it weight all the time and don't care if it's the politically correct name
Don't accuse me of politics when I'm trying to inject a little science into the thread
Blatantly plagiarized from Wikipedia:
"The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscosity characteristics. SAE viscosity gradings include the following, from low to high viscosity: 0, 5, 10, 15, 20, 25, 30, 40, 50 or 60. The numbers 0, 5, 10, 15 and 25 are suffixed with the letter W, designating they are "winter" (not "weight") or cold-start viscosity, at lower temperature. The number 20 comes with or without a W, depending on whether it is being used to denote a cold or hot viscosity grade. The document SAE J300 defines the viscometrics related to these grades."
|
|
|
Re: racing oil
[Re: @#$%&*!]
#1715885
12/28/14 07:02 AM
12/28/14 07:02 AM
|
Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
|
I Win
Joined: Jan 2003
Posts: 32,394
|
Quote:
Quote:
Don't hold out, let 'er rip! I promise to back you up whatever you say as long as you don't refer to oil viscosity as 'weight.'thats just the way did it back then
The stupid parts stores around here only shelf-stock VR1 Racing in 50 or 20-50 I got my latest supply from Amazon with a substantial rebate.
who cares what someone calls it as long as you know what they are talking about? i call it weight all the time and don't care if it's the politically correct name
Don't accuse me of politics when I'm trying to inject a little science into the thread
Blatantly plagiarized from Wikipedia:
"The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscosity characteristics. SAE viscosity gradings include the following, from low to high viscosity: 0, 5, 10, 15, 20, 25, 30, 40, 50 or 60. The numbers 0, 5, 10, 15 and 25 are suffixed with the letter W, designating they are "winter" (not "weight") or cold-start viscosity, at lower temperature. The number 20 comes with or without a W, depending on whether it is being used to denote a cold or hot viscosity grade. The document SAE J300 defines the viscometrics related to these grades."
not accusing you of anything but trying to make a simple thin more complex than it needs to be, ok we get it you are a very smart guy. a lot smarter than us who call it weight. but guess what, we don't care and have fun with your science.
|
|
|
Re: racing oil
[Re: @#$%&*!]
#1715887
12/29/14 03:17 PM
12/29/14 03:17 PM
|
Joined: Aug 2007
Posts: 1,271
Vista, California
67Satty
pro stock
|
pro stock
Joined: Aug 2007
Posts: 1,271
Vista, California
|
Quote:
The stupid parts stores around here only shelf-stock VR1 Racing in 50 or 20-50 I got my latest supply from Amazon with a substantial rebate.
You can get VR-1 from NAPA in a 10W-30, you just have to ask them to order it and it shows up by the next day.
|
|
|
Re: racing oil
[Re: 67Satty]
#1715888
12/29/14 04:04 PM
12/29/14 04:04 PM
|
Anonymous
Unregistered
|
Anonymous
Unregistered
|
If you hot lap / double entry on thinner oil in summer it can cause trouble and bearing failure ( local builder here --not me --has done it several times) On the dyno-- you get oil Hot -- or run thinner oil it does make more HP--how much- who cares? what is 10 HP on a 700 HP bracket engine? It is a test that is all- so what it makes 10 more HP Now on a circle track 350 two barrel with big rules limits and around 365 HP then that thin oil is the difference between first and last place I have never had a failure that could be blamed on oil unless you consider flat tappet lobe lifter issues --NEVER a bearing or wear issue due to oil. I have run every kind there is and it is like politics and religion and family matters--no good solid answers With Nitro or alky it becomes a different tale--it DOES matter what you run due to dilution--some work / some fail big time in that dept. Bracket racers might as well run what is on sale if they have a roller. 
|
|
|
Re: racing oil
[Re: mk_]
#1715889
12/29/14 07:02 PM
12/29/14 07:02 PM
|
Joined: Jul 2009
Posts: 116
Florida
mack
member
|
member
Joined: Jul 2009
Posts: 116
Florida
|
When I got the new 426 bullet from Arrow Racing they told me to go to the line with oil at 195 degrees... Also to run Mobil 1 10w30 full synthetic... So far no problems... I figure they know their engine.....
Mack Reeves
SST 2377
FS/D 2377
|
|
|
|
|
