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Oil pressure /viscosity 440-512 cui Stroker roller Engine in „hot „Idle question

Moparjack 489

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Hi everyone,
now the build and the „ break in „ with driven break in oil ( BR 40 ) it’s done , everything looks perfect, but just I like to know you’re experience

Engine components :
Motor have Main clearance about 0.003“and build with the follow parts :

TFS-61617801-C00 Heads​

With
440 Source Stroker Kit 440-512cui
+

COMP Cams Evolution Series Hydraulic Roller Lifters 89211-16​

and a

Howards Cams Retrofit Hydraulic Roller Camshafts 723445-08​


Plus the

Harland Sharp Heavy-Duty Roller Rockers S70016KE​



Still with the BR 40 oil :
Cold start about 70-80 PSI oil pressure in idle ( 1000 RPM)

Full warm up about 30 PSI in neutral by 1000 RPM and about 18-20 PSI in „gear „ (D) by 700-800 RPM

as soon if touch the pedal oil pressure rise like 40 Psi by about 1400RPM/ 60 Psi about 2000 RPM and goes up to 70+ by more RPM in Hot .

After I change the BR 40 break in oil to the Driven HR6 10W40 synthetic oil the Idle on in gear ( D) by 700-800 RPM goes a little better from 18-20 PSI to 20 to 22 PSI it shows me the mechanical autometer oil pressure instrument .

So now my Question:
how it looks for you’re experience , any worries about the „ low „ oil pressure in full hot by idle in gear around 700-800 rpm with 20 PSI ??? Or all perfect and enough for a „ summer daily driver“


„ I hear sometimes „ 10 PSI per 1000 RPM it’s still fine „….. that’s true ?


Or you would change to the Driven 15W -50 HR3 synthetic oil to see a little higher oil pressure in hot low idling around 700-800 RPM‘s ?

thank‘s in advance for you’re experience !!
 
You are in good shape. Run it and run it as hard as your parts selections normally permit. Good luck.
 
The 10lbs per 1000rpm has been greatly misinterpreted from the original statement. That 10 per 1000 is for maximum rpm not idle. You got a bleeder. Is it going to kill something? Probably not. Been thru this all before a few times. Cured my low rpm pressure problem , but you're going to read a lot of internet crap on this subject with no tangible solutions. I usually stay out of this subject anymore.
 
It looks very similar to my build, size & hardware wise. I'm getting about the same numbers, but my builder recommends VF1 10w30. I'm not racing this, so gonna drive it this way, and put some miles on it...
 
Sounds like that is the Melling M-63HP (or M-63 with the black "Hemi" spring, which is the same thing) oil pump. Those are the numbers you would get. The book says that's fine. But some people can't stand 18psi hot idling. If you want more you can go to 50w oil or put a Melling M-63HV (the long rotor oil pump) on it and run whatever oil you want.
 
Sounds like that is the Melling M-63HP (or M-63 with the black "Hemi" spring, which is the same thing) oil pump. Those are the numbers you would get. The book says that's fine. But some people can't stand 18psi hot idling. If you want more you can go to 50w oil or put a Melling M-63HV (the long rotor oil pump) on it and run whatever oil you want.

my 505 has been about the same way for 12ish yrs , some what hotter build than yours , about 20-22 idling , hot...goes up with rpm , idles at 1150 tho...
as long as it stays at least 20 hot idling , I don't worry about it .
 
It is just perfect! Drive on. Will last 100K miles that way. You don't need high pressure at idle.
 
Hi everyone,
now the build and the „ break in „ with driven break in oil ( BR 40 ) it’s done , everything looks perfect, but just I like to know you’re experience

Engine components :
Motor have Main clearance about 0.003“and build with the follow parts :

TFS-61617801-C00 Heads​

With
440 Source Stroker Kit 440-512cui
+

COMP Cams Evolution Series Hydraulic Roller Lifters 89211-16​

and a

Howards Cams Retrofit Hydraulic Roller Camshafts 723445-08​


Plus the

Harland Sharp Heavy-Duty Roller Rockers S70016KE​



Still with the BR 40 oil :
Cold start about 70-80 PSI oil pressure in idle ( 1000 RPM)

Full warm up about 30 PSI in neutral by 1000 RPM and about 18-20 PSI in „gear „ (D) by 700-800 RPM

as soon if touch the pedal oil pressure rise like 40 Psi by about 1400RPM/ 60 Psi about 2000 RPM and goes up to 70+ by more RPM in Hot .

After I change the BR 40 break in oil to the Driven HR6 10W40 synthetic oil the Idle on in gear ( D) by 700-800 RPM goes a little better from 18-20 PSI to 20 to 22 PSI it shows me the mechanical autometer oil pressure instrument .

So now my Question:
how it looks for you’re experience , any worries about the „ low „ oil pressure in full hot by idle in gear around 700-800 rpm with 20 PSI ??? Or all perfect and enough for a „ summer daily driver“


„ I hear sometimes „ 10 PSI per 1000 RPM it’s still fine „….. that’s true ?


Or you would change to the Driven 15W -50 HR3 synthetic oil to see a little higher oil pressure in hot low idling around 700-800 RPM‘s ?

thank‘s in advance for you’re experience !!
Just remember , your hydraulic rollers are fighting the roller valve springs with the 18 psi of marginally adequate oil pressure..
And a lack of idle pressure is a lack of volume..
 
Sounds like that is the Melling M-63HP (or M-63 with the black "Hemi" spring, which is the same thing) oil pump. Those are the numbers you would get. The book says that's fine. But some people can't stand 18psi hot idling. If you want more you can go to 50w oil or put a Melling M-63HV (the long rotor oil pump) on it and run whatever oil you want.
Sounds like that is the Melling M-63HP (or M-63 with the black "Hemi" spring, which is the same thing) oil pump. Those are the numbers you would get. The book says that's fine. But some people can't

Already inside:

IMG_1567.png
 
The 10lbs per 1000rpm has been greatly misinterpreted from the original statement. That 10 per 1000 is for maximum rpm not idle. You got a bleeder. Is it going to kill something? Probably not. Been thru this all before a few times. Cured my low rpm pressure problem , but you're going to read a lot of internet crap on this subject with no tangible solutions. I usually stay out of this subject anymore

so what you want try to tell me ? You mean my engine is **** , or I need to go to 15W-50 or what?
And excuse me „what a lot „ internet crap I read Mr.?
Can you bring me to the light please ?
Thanks in advance !
 
I'm surprised. I figured the high volume pump would have given you more at hot idle. So that being the case it tells you which way to go. Put in the 50w and see how it does. I'm doing a build that I will fire up next week using the HV pump. I'll see what I get for a hot idle. My M-63HP had low 20's idling hot but I'm idling a little higher than you.
 
Why does it need more oil pressure? He has 70-80 at cold idle, is that to low, because it too will be going up a lot with 50w oil. How is more oil pressure going to cool the valve springs at idle?

Flow provides more cooling, pressure is resistance to flow. Thicker oil doesn't flow as much as thin oil.

Cooling was brought up, biut no mention of coolant temp, fan type, radiator size, or what thermostat is in play.

How about an oil cooler, that will help the valve springs.
 
Why does it need more oil pressure? He has 70-80 at cold idle, is that to low, because it too will be going up a lot with 50w oil. How is more oil pressure going to cool the valve springs at idle?
He's a little concerned and would like a little more hot idling oil pressure. No big deal, a lot of people are like that. It won't go up at cold idle with thicker oil because the M-63HV bypasses at around 75 psi. That's why he has 70-80 now.
 
I'm surprised. I figured the high volume pump would have given you more at hot idle. So that being the case it tells you which way to go. Put in the 50w and see how it does. I'm doing a build that I will fire up next week using the HV pump. I'll see what I get for a hot idle. My M-63HP had low 20's idling hot but I'm idling a little higher than you.
No, I’m fine with 20 -22 psi in idle with gear inside in about 700Rpm, if I want more can go also raise idle to 800 or 900 rpm’s so I nearly see 30 Psi pressure . I just ask it like is 20 psi in idle for some specialist here to low or have bad experience about it …. In my case ( it’s short times only , not 5 minutes or so because it’s in gear ) if I put in neutral by 1000 rpm it’s shows me 30 psi already , so more than my new 2020 scat pack ….
 
the factory oil pressure light would come on at 5-7 Lbs. 10 lbs or above is plenty at idle when hot. if it goes up fast when raising the rpms it is fine.
 
I personally don’t like low-ish idle speeds with higher stressed valve trains, so I’d turn up the idle speed a bit, and take the extra oil pressure as a bonus.
 
Thanks all for you’re opinions !! So I think Im fine with it and still drive the driven HR6 10W40 and don’t change to the 15W15 .
 
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