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#1
07-23-2015, 06:42 AM
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oil psi
Is 20 Psi at idle to low goes up to 50-60 while driving. 406 #12 heads Crower 60210 cam.
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Conrad 79 Trans AM 406 #12 heads Torker II intake Crower 60210 750 holley vac. sec. T400 3500 Stall 3:73:1 rear.  ECMTTFMFers. IHTTFMFers.
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#2
07-23-2015, 07:05 AM
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No.
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Karl 
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#3
07-23-2015, 07:15 AM
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Conrad,
What oil you running and what type of sender & where is it located?
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Carburetor building & modification services Servicing the Pontiac community over 20 years |
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#4
07-23-2015, 07:32 AM
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Valvoline ZR 50w I firget on the sending unit lines I think close to the headers. not sure what name brand sending unit is.
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Conrad 79 Trans AM 406 #12 heads Torker II intake Crower 60210 750 holley vac. sec. T400 3500 Stall 3:73:1 rear. ECMTTFMFers. IHTTFMFers.
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#5
07-23-2015, 07:39 AM
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I meant elec or mech gauge?
Usually up next to dist is most accurate location & I personally like mech gauges over elec
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Carburetor building & modification services Servicing the Pontiac community over 20 years |
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#6
07-23-2015, 07:58 AM
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Even 5 psi will keep bearings afloat at hot idle, the issue is if the pressure comes up fast enough as the motor revs up, 8 to 10 psi per 1000 rpm to be on the safe side of spinning bearings.
Keep a close eye on this relationship!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#7
07-23-2015, 11:39 AM
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I got +- 20 psi at idle when engine is hot. Goes up to 40-60 while driving. All my cars.
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#8
07-23-2015, 01:40 PM
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Quote:
Quote:
What oil pump? What are the bearing clearances? Any indication of excess oil at the rockers? |
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#9
07-23-2015, 02:45 PM
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Quote:
50wt at cold start up should put up a pretty big number at idle.
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 frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. 
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#10
07-23-2015, 03:01 PM
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I run about 12 psi at hot idle (700rpm) and 40-60 during cruise around 2000rpm. 10w30 with zddp additive.
I would think a 50 weight would show more pressure.
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-Jason 1969 Pontiac Firebird |
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#11
07-23-2015, 03:07 PM
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Your numbers are exactly how mine behaves using 20W50 Valvoline racing oil. I've found that different viscocities of oil don't affect my pressure dramatically. Increasing my idle got me from 5 psi at idle to 20. (15 when very hot or getting off the freeway.)
As others have said before, that's fine. You could pull the engine, get in there and investigate, but there's really no need to.
__________________
 1965 Pontiac LeMans. M21, 3.73 in a 12 bolt, Kauffman 461.
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#12
07-23-2015, 07:09 PM
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Jeff mech. gauge.
__________________
Conrad 79 Trans AM 406 #12 heads Torker II intake Crower 60210 750 holley vac. sec. T400 3500 Stall 3:73:1 rear. ECMTTFMFers. IHTTFMFers.
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#13
07-23-2015, 07:12 PM
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The Factory service manual says the engine should make rated pressure by 2600 RPM.
The factory warning light came on @ 5-7 PSI. You're good.
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GOOD IDEAS ARE OFTEN FOUND ABANDONED IN THE DUST OF PROCRASTINATION |
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#14
07-23-2015, 07:22 PM
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Quote:
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Karl
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#15
07-23-2015, 07:56 PM
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Your oil pressure is normal for a classic Pontiac
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Tim Corcoran |
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