LUVTruck.com

Those of you running a sbc motor in anything, doesnt so much have to be a luv, and if you have a psi gauge, What is your psi at 180 degrees motor temp, and at idle??? Thanks-- T.

my v8 in my luv is about 80psi when i first crank it up and about 60psi at 180 deg. and an idle but if you touch the gas it peggs the guage out at 90 psi

I'v herd all you need is 10psi for every 1000 rpm but that seems alittle low to me.

As a basic rule of thumb, 10 lbs of oil pressure for every 1000 r.p.m's is required to keep a motor alive. So at idle, anything less than 10 should be of concern. Idiot light pressure senders trigger at around 7 p.s.i.
My motor puts out 20 p.s.i. @ idle with normal operating temp.

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Previous setup: 4.1 Buick V-6/TH 350
Current setup: 400 Small Block Chevy V-8/TH 350
9" ford rear end/short bed/blue
What do Water, Electricity and Humans have in common... They all travel the path of least resistance.

Is there a problem LUVINIT?

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Previous setup: 4.1 Buick V-6/TH 350
Current setup: 400 Small Block Chevy V-8/TH 350
9" ford rear end/short bed/blue
What do Water, Electricity and Humans have in common... They all travel the path of least resistance.

Well, I don't think so, but at start up, and if I am cruising, I am at 60psi. And at temp (180) and if I pull up to a stop sign, then it drops to about 10. So with all that said, and reading these replys, maybe not. Now luv junky seems to be a little high. Are you running a high psi oil pump???

Keep in mind that too high of earl pressure is bad. it pumps all of your oil to the top end and the bottom end will starve.... bye bye rod bearings.

your first hint will be when you mash the gas pedal down and you watch the pressure climb... and then it falls before you redline and shift. u just starved your bottom end. Actually you might be starving it even if you don't see the pressure drop near redline. Run as much capacity as you can (big pan), a good filter and BLUEPRINT your HV pump. You only need so much oil on your valvetrain.

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1978 LUV Truck 2WD
450 "Small Block" Chevy
3.70 Ford 9
28x10 Goodyears

high psi oil pump won't hurt a motor but a high volume oil pump will suck the oil pan dry.there is a big difference between psi and volume

with that being said when i put my motor together i had my machinest resize my rods so i could run tighter clearences on the rod and main bearings just like in newer style v8's so i can run thinner oil i just make the diffrence up in bearing size and your probably going to ask why would you go through all that trouble. well thinner oil moves through the engine with ease and it can move deposits frome the main and rod bearings more efficientley why do you think new cars run tight clearences and normally 5w30. some top fuel dragsters will run 0 weight oil do some research and you will see what i mean

[quote="LUVSADRAG"]Keep in mind that too high of earl pressure is bad. it pumps all of your oil to the top end and the bottom end will starve.... bye bye rod bearings.



psi=pressure

volume=more oil in your valve train

Yes there is a big difference between pressure and volume... However, A high volume oil pump is really nothing more than a regular pump with a heavier resistance on its relief spring which allows it to pump to a higher PSI level before it bleeds off. A high VOLUME pump pumps more volume by increased PRESSURE.

You are correct to a certain point in saying high pressure will not hurt a motor... this is assuming its a race oriented motor with plugged off galleys and/or dedicated oilling systems to feed oil only to the necessary places. Most high perf street strip motors are not set up this way. A high volume pump (aka high pressure pump) will starve a motors bottom end if it pumps at a rate high enough that it sucks all of its supply out of the sump.

Tighter clearances so you can run thin oil is a good idea. Thinner oil does flow through the motor easier but its main advantage is it offers less resistance to the reciprocating assemblies that are immersed and turning in it. TF dragsters and Cup cars have dedicated oiling systems all over the motor. there is never a problem with oil not flowing fast enough to a given area. the crank, cam etc can spin faster if its not being held back with heavy oil.

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1978 LUV Truck 2WD
450 "Small Block" Chevy
3.70 Ford 9
28x10 Goodyears

So with a not so stock, mild v8, what oil do you recommend? (stock oil pump)

10w-40 with a good filter. I sometimes use a friction modifier like Prolong (because i get the stuff for next to nothign)fromexperience it works. if you are the "tuner" type and have to extract every last HP and have some extra $$$$ then try a synthetic.

I run Royal Purple in everything besides my daily driver right now.

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1978 LUV Truck 2WD
450 "Small Block" Chevy
3.70 Ford 9
28x10 Goodyears

that is what i run in my other v8 is 10w40 and a bottle of lucas.does any body else use lucas and what do you guys think of it

In my 2002 silverado, I run castrol high mileage 10w30 with a supertech filter. I've never had a problem. At operating temperature, at idle, I get about 30-40 psi.

I've run Lucas before and it also works good. I'd say it works about the same as Prolong.

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1978 LUV Truck 2WD
450 "Small Block" Chevy
3.70 Ford 9
28x10 Goodyears