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#1
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crazy oil pressure
I was a little low at idle hot about 10-15 lbs in drive so I added a bottle of STP to my 15-40 Rotella cj-4 that already had a bottle of EOS, to thicken it up a little.I also adj.the lash on my solid cam.Now the pressure doesnt go below 40 lbs at idle.I cant believe 1 bottle of Stp could make such a drastic change.Any ideas?
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Mark 1970 Lemans Convertible,462,6x-4, 234/242 cam.3.42 posi.12.55@109,4100 lbs...SOLD.... 1968 Firebird , 467 , KRE d-ports ,stock type suspension,3100lbs (1.30 60')(6.08 1/8)(113.43)different runs 9.59 @140.71 on E85 all motor 8.97@148.63 on 150 shot |
#2
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That stuff is thick! thats why I use a can 15 oz of marvel mystery with my rotella also..... Pontiac vitamins
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
#3
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Im wondering if something was stuck under the check ball on the oil pump and it dislodged.I cant believe 1 bottle of STP would raise the viscosity that much.
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Mark 1970 Lemans Convertible,462,6x-4, 234/242 cam.3.42 posi.12.55@109,4100 lbs...SOLD.... 1968 Firebird , 467 , KRE d-ports ,stock type suspension,3100lbs (1.30 60')(6.08 1/8)(113.43)different runs 9.59 @140.71 on E85 all motor 8.97@148.63 on 150 shot |
#4
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Quote:
I agree with Grandville 455 on the Marvel mystery oil. It's great stuff! You can also try running 20W-50 oil also and pick the pressure up another 5-10 lbs.
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Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
#5
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This is a brand new short block with an eagle stroker kit so the clearances are a little more than stock.Im going to 20-50 next oil change,I just thought the STP would thicken the 15-40 up a little not a lot!
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Mark 1970 Lemans Convertible,462,6x-4, 234/242 cam.3.42 posi.12.55@109,4100 lbs...SOLD.... 1968 Firebird , 467 , KRE d-ports ,stock type suspension,3100lbs (1.30 60')(6.08 1/8)(113.43)different runs 9.59 @140.71 on E85 all motor 8.97@148.63 on 150 shot |
#6
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oil pressure
My 462 runs 180 degrees, 30 weight oil and has 15 to 17 pounds @ idle,700RPM in drive.as they say,10 pds oil pressure for every 1000 rpm.As long as your pressure rises acordingly under load there is no problem.when I first rebuilt the motor it did hold 20 pds @ idle . but as clearances loosen up some, pressure might drop slightly.my engine has only 1600 miles on rebuild,no worries with 15 pds.. ps I live in florida where temps average 85 to 95 degrees air temp
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