Re: to much oil pressure?
[Re: dcr]
#1081797
09/24/11 10:14 PM
09/24/11 10:14 PM
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Joined: Dec 2008
Posts: 48 louisiana
71440dart
member
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member
Joined: Dec 2008
Posts: 48
louisiana
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i know milidon sells an externally adjustable oil pressure regulator, part number 21550.
71 dodge dart race car,440/727 best so far: 11.23 @119
74 plymoth duster, 408SB/727
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Re: to much oil pressure?
[Re: MR_P_BODY]
#1081800
09/25/11 03:48 AM
09/25/11 03:48 AM
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Joined: Dec 2006
Posts: 3,667 Arizona
Chris'sBarracuda
master
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master
Joined: Dec 2006
Posts: 3,667
Arizona
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Quote:
Put in lighter oil first and see where its at... all that pressure is just eating power
Quote:
Swap in a standard volume pump. You are just wasting power recirculating oil with that high volume pump.
I'm not buying that argument at all.
I tried a back to back run deal years ago.
Ran the car with max oil pressure and 20W-50 oil.. 100 psi.
Then drained the oil and put in 10W-30 in it. (both synthetic and same brand).. Also backed off the oil pressure with the adjustable spring. 70 psi.
The car went actually slower by .005.. And that was just due to the difference in DA..
You may see a difference on the dyno, but you wont see anything on the race track..
Just my
Chris..
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Re: to much oil pressure?
[Re: Chris'sBarracuda]
#1081801
09/25/11 04:11 AM
09/25/11 04:11 AM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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at what pressure do you blow thru the bypass in the filter?
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: to much oil pressure?
[Re: sixpackgut]
#1081802
09/25/11 04:26 AM
09/25/11 04:26 AM
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Joined: Dec 2006
Posts: 3,667 Arizona
Chris'sBarracuda
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Joined: Dec 2006
Posts: 3,667
Arizona
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Quote:
at what pressure do you blow thru the bypass in the filter?
Good question Ray..
I have used both K & N and System 1.. Don't know what the bypass is on either..
I just did that test years ago to see for myself.. I was always told that all that oil pressure was slowing me down sooooo much..
Not True..
My B1 now has about 90-95# cold and through the traps. But goes down to 35-40# @ idle after a run..
Chris..
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Re: to much oil pressure?
[Re: dcr]
#1081805
09/25/11 09:55 AM
09/25/11 09:55 AM
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Joined: Dec 2006
Posts: 3,667 Arizona
Chris'sBarracuda
master
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master
Joined: Dec 2006
Posts: 3,667
Arizona
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NO.. Guys run chains with near 950# open spring pressure. That would be much more strain on the timing chain.. How did you not hit a valve when it broke? Or did you.. Chris..
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Re: to much oil pressure?
[Re: rickstershemi]
#1081808
09/25/11 10:38 AM
09/25/11 10:38 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Sorry to jump in with a question: But my new 408" has what I would say unusual high oil pressure...75# - 80# at idle completely warmed up....I switched from 20/50 to 10/30 as suggested in another thread and it did lower it to 65# - 70# but still climbs to 100# as the rpms climb? It does have a Mellings HV pump and also we threw a 90* oil filter adapter on it as it was all we had lying around....it is untouched (meaning it has never had any of the neat tricks I've read about done to it to improve flow). I also run a Wix 51515R filter.
Could the 90* adapter be the problem or at least part of the problem...??????
Or am I just overly concerned...??????
Thanks in advance,
Rickster
Doubtful on the 90* filter mount... my big concern would be possibly blowing out a filter or filter base O-ring... I ran a stock 90* mount and never had any where near that pressure
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Re: to much oil pressure?
[Re: dusturbd340W5]
#1081810
09/25/11 10:53 AM
09/25/11 10:53 AM
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Joined: Dec 2009
Posts: 20,667 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,667
in a cattle trailer down by th...
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Quote:
Quote:
Sorry to jump in with a question: But my new 408" has what I would say unusual high oil pressure...75# - 80# at idle completely warmed up....I switched from 20/50 to 10/30 as suggested in another thread and it did lower it to 65# - 70# but still climbs to 100# as the rpms climb? It does have a Mellings HV pump and also we threw a 90* oil filter adapter on it as it was all we had lying around....it is untouched (meaning it has never had any of the neat tricks I've read about done to it to improve flow). I also run a Wix 51515R filter.
Motor seems to be getting plenty of lubrication where neede.
Could the 90* adapter be the problem or at least part of the problem...??????
Or am I just overly concerned...??????
Thanks in advance,
Rickster
I had the same problem on my 416 with the melling HV I took it off and threw it in the trash and went with a standard pump problem solved.I still have 35-40 at idle with oil at 160 and 80 in the traps.
I have the Melling HV on my new engine but I've opened up all the passages, rounded the corners and blocked the oil to the tappets and used full groove bearings I have 75/80 cold at idle and 25/30 hot. I'm using 5w20 oil though and I think I'm going to go to 0w40 or 5w30 synthetic.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: to much oil pressure?
[Re: MR_P_BODY]
#1081812
09/25/11 11:20 AM
09/25/11 11:20 AM
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Joined: Jul 2006
Posts: 9,366 Lehigh Acres, Florida
rickstershemi
master
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master
Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
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Quote:
Quote:
Sorry to jump in with a question: But my new 408" has what I would say unusual high oil pressure...75# - 80# at idle completely warmed up....I switched from 20/50 to 10/30 as suggested in another thread and it did lower it to 65# - 70# but still climbs to 100# as the rpms climb? It does have a Mellings HV pump and also we threw a 90* oil filter adapter on it as it was all we had lying around....it is untouched (meaning it has never had any of the neat tricks I've read about done to it to improve flow). I also run a Wix 51515R filter.
Could the 90* adapter be the problem or at least part of the problem...??????
Or am I just overly concerned...??????
Thanks in advance,
Rickster
Doubtful on the 90* filter mount... my big concern would be possibly blowing out a filter or filter base O-ring... I ran a stock 90* mount and never had any where near that pressure
Having never used one I wasn't sure. I could just swap out to the standard pump I guess.....my engine builder said not to worry about it so I probably won't.....my 565" in the vette alway ran 65-70 at idle and up to 85-90 through the traps and never had an issue.
Didn't think the filter could blow out....isn't there a pressure regulator valve that keeps that from happening...???? Showing my ignorance today
Rickster
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Re: to much oil pressure?
[Re: dcr]
#1081813
09/25/11 11:36 AM
09/25/11 11:36 AM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
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Joined: Oct 2003
Posts: 7,506
Az
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Yes, 75 - 80 is too high at idle hot. Should be in the 30 - 40 range. Go to a lighter oil - full synthetic - IMO. Highly unlikely that oil pressure is your timing chain breaking problem. Misalignment / sudden engine directional or rpm change ( backfire, etc. ) could break it.
Fastest 300
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