Oil Pressure
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Laughing Gas
Joined: Jun 2007
Posts: 811
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Oil Pressure
I have a 460 bored 60 0ver. Running a comp 280 H cam, with roller tip rockers, Edelbrock performer heads, performer rpm intake, 750 Holley 3310 carb. During breakin, I used valvolines 20-50 racing oil and breakin lube for the flat tappet cam. Because of the cam, I thought I would run the valvoline 20-50 due the the extra zinc. My oil pressure gauge is show 80.
Is this way too high?
Would I be better running a good 10-40 with an additive?
Is this way too high?
Would I be better running a good 10-40 with an additive?
Cross-Country
Joined: Jul 2004
Posts: 52
Likes: 0
Oil Pressure
80 pounds is about normal for a 460 using a quality mechanical gauge.
I had a 1987 460 F250 and the dash gauge, I thought, read low because it stayed just below half when warm, cold or whatever. I hooked up a mechanical gauge and got 75 to 85 pounds when the engine was at operating temperature.
I had a 1987 460 F250 and the dash gauge, I thought, read low because it stayed just below half when warm, cold or whatever. I hooked up a mechanical gauge and got 75 to 85 pounds when the engine was at operating temperature.
Senior User
Joined: Nov 2008
Posts: 276
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From: Nashville NC
Keep in mind where that oil pump shaft connects & only connection between it turning & not turning is that little tention pin holding the dizzy gear to the dizzy shaft.
I never thought much about it, till I had the top of the engine off doing some repairs, & after it was back together & primming the oil pump, almost burnt up a 3/8s drill trying to turn the oil pump shaft to prime the oil up.
I had 20/50 oil in the pan at that time, so made me think & change to 10/40. Even with the 10/40 it runs around 70 psi cold & 60 out on the road. Ol engines got 77,000 miles on it right now, so I'm kinda tickled its running that much presure.
Neil
I never thought much about it, till I had the top of the engine off doing some repairs, & after it was back together & primming the oil pump, almost burnt up a 3/8s drill trying to turn the oil pump shaft to prime the oil up.
I had 20/50 oil in the pan at that time, so made me think & change to 10/40. Even with the 10/40 it runs around 70 psi cold & 60 out on the road. Ol engines got 77,000 miles on it right now, so I'm kinda tickled its running that much presure.
Neil
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Laughing Gas
Joined: Jun 2007
Posts: 811
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Thanks for the information guys. I think I'll switch over to 10-40 next time I change it out. ANy suggestions on a good 10-40 with plenty of zinc, or should I just figure on adding breakin additive?
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
the added zinc is only really important on cam breakin honestly.
when running a non race gas motor on regular oil i prefer 10w-30 Valvoline myself, but it's just personal preference. With the exception of the zinc even the generic oils are actually better quality then when these engines first came out. buy a name brand you like and run it.
when running a non race gas motor on regular oil i prefer 10w-30 Valvoline myself, but it's just personal preference. With the exception of the zinc even the generic oils are actually better quality then when these engines first came out. buy a name brand you like and run it.
Senior User
Joined: Nov 2008
Posts: 276
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From: Nashville NC
The diesel oils still have a good amount of zink in them as well as the full synthetic types of oil.
Lucas has a break in oil with zink & Summit now has an engine oil with zink for our old engines.
Neil
Lucas has a break in oil with zink & Summit now has an engine oil with zink for our old engines.
Neil
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Posting Guru
Joined: Nov 2008
Posts: 1,138
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From: Lakewood, Colorado
Run a shell rotella 15-40. Thats the motor oil i use to break in all my flat tappet engines.
But the way I see it, now that its broken in, no need to really run much zinc. I know with the flat tappet cars I have built that I will break it in and for the first two oil changes run a zinc oil, but after that, i just run good old valvoline.
But the way I see it, now that its broken in, no need to really run much zinc. I know with the flat tappet cars I have built that I will break it in and for the first two oil changes run a zinc oil, but after that, i just run good old valvoline.
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