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Re: Too much pressure?
[Re: Dodgem]
#750249
07/17/10 01:24 PM
07/17/10 01:24 PM
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Joined: Jul 2008
Posts: 30,446
Florida STAYcation
dOoC
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,446
Florida STAYcation
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Quote:
No issues other than the 1/2 hp extra it takes to drive the pump at 100 psi compared to 65 psi.
What do you mean .... 1/2 the horsepower ... or 1/2 horsepower ?
I would say it would be ONE HALF the HP to drive the pump at 65 vs 100 psi.
PLUS there is the factor of all that uNnecessary Xtra oil flying around.
 .... 80-100 psi is in no-way needed in any application I can think of.
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Re: Too much pressure?
[Re: dOoC]
#750254
07/17/10 07:42 PM
07/17/10 07:42 PM
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Joined: Jan 2003
Posts: 32,943
Grand Prairie,Texas
stumpy
I Win
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I Win
Joined: Jan 2003
Posts: 32,943
Grand Prairie,Texas
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Quote:
GRUMPster ..... a .5 horsespower loss ? .... in your dreams !! 
If you believe that ... you need your daily after-noon seasoned-citizen NAP !!
This jerkoff reply to me repeating what was said rattled my cage. It wasn't necessary and rather childish. Maybe you should stop and think before typing. As long as I get replies like this from you I will give it right back to you Mr.Know it all.
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Re: Too much pressure?
[Re: stumpy]
#750255
07/17/10 09:19 PM
07/17/10 09:19 PM
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Joined: Jul 2008
Posts: 30,446
Florida STAYcation
dOoC
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,446
Florida STAYcation
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Me .... a KNOW IT ALL ? .. I have never come across like that at all. A good man knows his limitations ...and that is me in so many ways. If you give me a  .... and I have not even addressed you in any ways ....you will get-it-back in-spades. And I stand-by my statement about too-much-pressure.
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Re: Too much pressure?
[Re: Curt Hildebrandt]
#750262
07/18/10 12:41 PM
07/18/10 12:41 PM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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well I just said 1/2 hp more as say it take 1/2 hp to drive the pump at 65 lb it might be 1 to drive it at 110?? I don't know what it takes but my 1/2 drive drill (maybe 1/3 horse??) would drive mine to over 100 lb before I put the adjustable relief spring in.
Maybe at RPM it takes more but load will not increase once pump starts to by pass???
anyone did dyno time lowing pressure between runs??
Hears what Dvorak says
3. Oil pressure is the horsepower’s enemy. If you can get the oil to return to the sump and pick up and not uncover the screen, a good stock eliminator or super stock eliminator can survive on as little as 6 or 7 pounds per 1,000 RPM. That means oil pressure between 42 and 49 pounds at 7,000 RPM will live and the freed up horsepower can be dramatic. In step 2 above where we discuss changing the viscosity of oil to free up horsepower also reduces the oil pressure. That’s where some of the gain comes from. Some engines like our big block Chrysler, has an external oil pump with an easily accessible relief valve. It takes a couple of minutes to make the oil pressure adjustable by drilling and tapping the pressure relief cap and inserting an adjuster like is used on a rocker arm, where the ball end plugs into the spring below. Crack the nut and turn in or out the adjuster. You can make it work like each full turn equals 10 pounds of oil pressure. The combination of the oil, oil temperature and the adjustment will enable the racer to bring the oil pressure to the bare minimum. Lower pressures than I have here are more risky but respond in ET. It is good to consult with your engine builder before you exercise this option
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Re: Too much pressure?
[Re: Mopar_Country]
#750263
07/18/10 03:23 PM
07/18/10 03:23 PM
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Joined: Jul 2008
Posts: 30,446
Florida STAYcation
dOoC
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,446
Florida STAYcation
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Quote:
Are you referring to me or doc? I was simply trying to tell doc is does not use half of all available horsepower like he is saying.
MC ....I am not suggesting AT ALL that it takes "1/2 the avail HP" to drive the pump. I honestly do NOT know.
I am just debating the suggestion that it takes just 1/2 of 1 HP to drive the pump to 100 psi ... vs 65 psi.
Someone asked .... well HOW do you determine how-much draw there is. Just have a 110v driven oil pump on a dyno.
My guess ... 65 psi at 6,000 rpm .... 25 horsepower ? 100 psi at 6,000 ? .. 35-40 hp.
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Re: Too much pressure?
[Re: Dodgem]
#750264
07/18/10 03:55 PM
07/18/10 03:55 PM
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Joined: Jul 2008
Posts: 30,446
Florida STAYcation
dOoC
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,446
Florida STAYcation
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Quote:
Hears what Dvorak says
3. Oil pressure is the horsepower’s enemy. If you can get the oil to return to the sump and pick up and not uncover the screen, a good stock eliminator or super stock eliminator can survive on as little as 6 or 7 pounds per 1,000 RPM. That means oil pressure between 42 and 49 pounds at 7,000 RPM will live and the freed up horsepower can be dramatic. In step 2 above where we discuss changing the viscosity of oil to free up horsepower also reduces the oil pressure. That’s where some of the gain comes from. Some engines like our big block Chrysler, has an external oil pump with an easily accessible relief valve. It takes a couple of minutes to make the oil pressure adjustable by drilling and tapping the pressure relief cap and inserting an adjuster like is used on a rocker arm, where the ball end plugs into the spring below. Crack the nut and turn in or out the adjuster. You can make it work like each full turn equals 10 pounds of oil pressure. The combination of the oil, oil temperature and the adjustment will enable the racer to bring the oil pressure to the bare minimum. Lower pressures than I have here are more risky but respond in ET. It is good to consult with your engine builder before you exercise this option
GOOD stuff D e ......
I had not seen that observation on the part of Double D ... but it seems to agree with a article that WJ did for National Dragster some years ago. He runs his PS motor up to what ? .. 9k ? ... and he uses 50 psi.
NOT ONLY less HP to drive the pump .. the lower psi throws less oil around in the crankcase ... that the crank and rods have to pass-through.
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It doesn't matter because the problem is fixed anyway.
