LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Oil pressure drop at higher rpms

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Old May 5, 2010 | 06:35 AM
  #1  
GreenZLT1's Avatar
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From: Armada, Michigan
Oil pressure drop at higher rpms

I have searched and searched, but I wanted to get someones opinion on my setup. My oil pressure seems to drop at WOT and even if I take off somewhat hard. If I take off easy or rev the motor in neutral, I have no problems.

Oil pressure:

Cold Idle: 60-65 PSI
Hot Idle: 25-30 PSI
Hot Cruise: 40-45 PSI

WOT will climb to 60, then back off to about 30 PSI and that’s when I freak out and let off the gas. After that it climbs back to normal pressure. If I take off hard but not full WOT, oil pressure will drop at around 4- 4500 rpms but will not go as low as 30 psi.

I have the stock oil pan, the windage tray was left in there, Jegs 23501 Standard Volume pump with 65-70 quick relief spring installed, a melling 55S1 5/8” pickup that has been installed correctly and tack welded in, 5 quarts of Valvoline 10w-30 and a standard Wix oil filter. Motor has 260 miles on it. Stock oil pressure gauge.

Any suggestions on where to start? I have read smoe threads where people claim this is normal for an early LT1 but this makes me nervous as hell.


Thanks,

Rob
Old May 5, 2010 | 06:59 AM
  #2  
shoebox's Avatar
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From: Little Rock, AR
Have you followed this very recent thread?

https://www.camaroz28.com/forums/sho...d.php?t=746620
Old May 5, 2010 | 09:44 PM
  #3  
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From: Kantuckee Yo'
Originally Posted by shoebox
Have you followed this very recent thread?

https://www.camaroz28.com/forums/sho...d.php?t=746620
That is the thread I started with the same problem you are describing. Please consider contributing to it since it has generated great interest and over 50 responses.
Old May 6, 2010 | 03:26 AM
  #4  
GreenZLT1's Avatar
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From: Armada, Michigan
I didn't see that thread. Thanks!
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