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Keith Black oil pump pressure adjustment?
#2346541
08/01/17 02:35 AM
08/01/17 02:35 AM
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Joined: Aug 2011
Posts: 51 San Diego, USA
SoCalRacer
OP
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OP
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Joined: Aug 2011
Posts: 51
San Diego, USA
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I have a KB Hemi/BB aluminum body oil pump with -12AN external lines that looks like ones I've seen on fueler engines. I think it is putting out too much pressure (90+ psi). Does anybody have an instruction sheet for one of these that shows how to adjust the pump pressure?
Thanks
Last edited by SoCalRacer; 08/01/17 02:36 AM.
If it ain't broke ... you're not pushing it hard enough.
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Re: Keith Black oil pump pressure adjustment?
[Re: SoCalRacer]
#2346675
08/01/17 01:45 PM
08/01/17 01:45 PM
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Joined: Oct 2006
Posts: 200 AB
Efidart
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enthusiast
Joined: Oct 2006
Posts: 200
AB
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The Milodon 21 GPM pump I'm running is netting me around 110 PSI up top, took a bit of shimming and finding the stiffest bypass spring to get it up there. If you do want to lower it the Milodon adjustable one works if it doesn't interfere with your motor mounts.
TT Predator headed 572 7 Second Street Car. Fastest Mopar Drag Week 2015 Fastest Mopar & Dodge Drag Week 2017 Pro Street Power Adder Champion Drag Week 2017
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Re: Keith Black oil pump pressure adjustment?
[Re: MR_P_BODY]
#2347086
08/02/17 01:31 AM
08/02/17 01:31 AM
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Joined: Aug 2011
Posts: 51 San Diego, USA
SoCalRacer
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OP
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Joined: Aug 2011
Posts: 51
San Diego, USA
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Straight 30 weight Brad Penn is what the previous owner put in it. I have seen the Milodon adjuster and know how to play the relief spring game, I just didn't know if the KB had a pressure adjustment method built-in. From some replies it sounds like 90 psi isn't all that bad? Engine is an iron RB with Edelbrock heads....nothing trick, car only runs 9.60's
It's only the second time out since I got it, but I'll pay closer attention to it at the track this weekend; see what it does when hot, at higher rpm, etc.
Last edited by SoCalRacer; 08/02/17 01:51 AM.
If it ain't broke ... you're not pushing it hard enough.
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Re: Keith Black oil pump pressure adjustment?
[Re: SoCalRacer]
#2347196
08/02/17 11:24 AM
08/02/17 11:24 AM
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Joined: Oct 2004
Posts: 3,097 back in Georgia
dthemi
master
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master
Joined: Oct 2004
Posts: 3,097
back in Georgia
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When you see pro stockers turn 10,000 on 15-20 pounds oil pressure it makes ya wonder lol.
Like Andy said, they'll still over run the bypass at higher revs, but they won't idle, or hit 100+ as soon as you blip the throttle with a softer, or adjustable spring. I like the big pumps for bracket stuff when the motor is on the line at 200 degrees from hot lapping. You'll still have pressure even if the idle is only 20 pounds.
Sure too much pressure costs a few ponies, and weening them off oil is good for power. I just haven't seen 100 pounds pressure hurt anything other than a cheap oil filter. I have seen too little volume destroy stuff.
I did a high reving small motor that i tried to cut the oil down as much as possible without losing pressure. factory steel crank in a de stroked 400, 9000rpm. The standard pump held 55 psi but ate bearings (3 times). Switched to a HV at 55 and no more trouble. Doesn't make sense, but that's how it went.
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