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Re: Easiest way to lower oil pressure? [Re: Dart 340] #649960
03/24/10 09:50 PM
03/24/10 09:50 PM
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Chilliwack B.C. Canada
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Put a pan heater on it, plug it in for an hour before you start it. After some use the pressure will come down a bit anyway. It is a bit high.

Sheldon

Re: Easiest way to lower oil pressure? [Re: RUNCHARGER] #649961
03/24/10 10:03 PM
03/24/10 10:03 PM
Joined: Feb 2009
Posts: 2,034
NW Indiana
deansrr Offline
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Easiest Way, pull the drain plug

someone had to say it (love the banna)


1973 Road Runner 1974 Satellite (for sale) 1973 240z (wifes) 1993 Ramcharger (thanks Devil) 2002 Honda S2000
Re: Easiest way to lower oil pressure? [Re: RUNCHARGER] #649962
03/24/10 10:08 PM
03/24/10 10:08 PM
Joined: Mar 2010
Posts: 151
MotorCity
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MotorCity
It sounds like you have half groove main bearings with a high volume high pressure pump. I have seen small block blow out the filter or the gasket on the right angle adapter with that kind of pressure. Full groove mains will drop the pressure down to 60 cold, 30 hot, plus feed more oil to the rod bearings.

Re: Easiest way to lower oil pressure? [Re: RC91] #649963
03/24/10 11:00 PM
03/24/10 11:00 PM
Joined: Feb 2008
Posts: 711
Montana
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Montana
My last three engines that I rebuilt have all run 80+ cold, pushing 100# when revved a little. They drop down to 50-60# hot. The teen I built has about 15K on it now and still runs 40# hot. My 340 and 408 are still on the high side but will come down in time and miles. I think that you will be fine.

Re: Easiest way to lower oil pressure? [Re: dOrk !] #649964
03/25/10 05:01 AM
03/25/10 05:01 AM
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Posts: 25,200
Upper Midwest
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Quote:

Quote:

Quote:

NO real EZ way to lower pressure on an A engine(like on a B-engine) ... but the benefits are not only saved HP on running the pump less ... but also less oil flying around hitting the crank and rods PLUS less oil on the cyl walls.


For the type of driving it wounds like this vehicle will be doing he will NEVER notice any difference.




His type of driving ? .. it is a race car. Now if he does not care about his ET ... I will stand corrected.


He states this: "I get an occasional
6000 run, but not much above that often, and not
for extended time."
So go figure. that kind of pressures he won't make a noticeable difference. People are racing and driving with that kind of pressure all the time. In the real world there are a lot more variables that will come into play that will change things a heck of lot sooner than that. Including driving consistancy.
On a good warm day you will be glad that you have a little extra to work with. that pressure will take care of itself and is not excessive to the point of being harmful. Nor will the pressures in this case contribute to a gasket or filter blowing out if quality parts and careful assembly proceedures have been used.

Re: Easiest way to lower oil pressure? [Re: MoparforLife] #649965
03/25/10 10:48 AM
03/25/10 10:48 AM
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Posts: 1,195
Snowing in the north!
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Dart 340 Offline OP
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I guess the second part of my question had to do
with pressure and usage of Rhoads lifters. If I
understand correctly, they bleed off oil at lower
rpms. Will they still function correctly at the
pressures I am seeing?

Re: Easiest way to lower oil pressure? [Re: Dart 340] #649966
03/25/10 11:28 AM
03/25/10 11:28 AM
Joined: Jan 2010
Posts: 456
Santa Barbara, CA
HitIt Offline
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I'd ask Rhodes directly if it were me.

Re: Easiest way to lower oil pressure? [Re: HitIt] #649967
03/25/10 11:52 AM
03/25/10 11:52 AM
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Upper Midwest
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If your lifters were not bleeding down your engine would not run or it would be missing do to valves being held open.
This from the Rhoads sight: Q. Can a high volume or high-pressure oil pump be used with Rhoads Lifters?
A. Yes. As the bleed off is a function of rpm a high volume/pressure pump can be used without any problem at all.

Re: Easiest way to lower oil pressure? [Re: MoparforLife] #649968
03/25/10 12:11 PM
03/25/10 12:11 PM
Joined: Apr 2008
Posts: 1,195
Snowing in the north!
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Dart 340 Offline OP
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Cool, there we have it.
THanks.


Quote:

If your lifters were not bleeding down your engine would not run or it would be missing do to valves being held open.
This from the Rhoads sight: Q. Can a high volume or high-pressure oil pump be used with Rhoads Lifters?
A. Yes. As the bleed off is a function of rpm a high volume/pressure pump can be used without any problem at all.



Re: Easiest way to lower oil pressure? [Re: Dart 340] #649969
03/25/10 03:00 PM
03/25/10 03:00 PM
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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while the numbers sound a tad higher than normal, I wouldn't be concerned. high oil pressure when cold and having to wait till it warms up to beat on it?
You should wait for it to fully warm up anyway before beating on it. cold parts fit looser than warm parts, and beating on a cold engine might be bad for the piston skirts.

I like to wait until my oil pressures start to drop, indicating that the oil is warmed up and the rest of the engine is at operating temps...before I beat on it.


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Re: Easiest way to lower oil pressure? [Re: Dart 340] #649970
03/25/10 03:47 PM
03/25/10 03:47 PM
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Posts: 36,040
Lincoln Nebraska
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Lincoln Nebraska
Quote:

I guess the second part of my question had to do
with pressure and usage of Rhoads lifters. If I
understand correctly, they bleed off oil at lower
rpms. Will they still function correctly at the
pressures I am seeing?


From what I understand your choice of viscosity is what affects the controlled bleed down rate of Rhodes (& similar) type lifters as in thinner will bleed them down faster and in effect tame down more a wild cam than a thicker oil would and that there is a more recent brand of (Rhodes type bleed down) lifters that are much quieter than the been around forever Rhodes' but are slightly less effective. Cant remember the brand.


live every 24 hour block of time like it's your last day on earth
Re: Easiest way to lower oil pressure? [Re: Dart 340] #649971
03/25/10 04:30 PM
03/25/10 04:30 PM
Joined: Mar 2005
Posts: 2,060
Pendleton NY
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terzmo Offline
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numbers are fine...I run 20/50 and get a bit higher pressure at normal operating conditions than you do..same at cold...

I dropped My oil pressure by using thinner oil plus got My engine to run cooler by adding a 7 blade steel clutch fan...it ran hot in traffic. Had a 6 blade alum flex fan and it did not do the job.

Re: Easiest way to lower oil pressure? [Re: Dart 340] #649972
03/25/10 06:40 PM
03/25/10 06:40 PM
Joined: Jun 2004
Posts: 1,629
wilmington,ohio
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wilmington,ohio
leave it alone.

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