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  1. #1
    VOA Member
    since 2016
    Oregon/SW Washington

    Join Date
    Nov 2015

    Gen 3 Twin Turbo Guys Only. Oil Pressure Question

    Ok gents, I am looking at a Gen 3 twin turbo Viper that was built by M2K. Here is a link to it:

    Here's the deal. When the car warms up, the oil pressure drops to around 14 PSI...or a little over half up to the 25 PSI marker. Now, I realize a built 522 cubic inch motor that has aftermarket bearings will be a looser motor...and oil pressure will probably be a bit lower than normal. I also know that the service manual says a stock motor is fine that low at idle. However, this seems too low to me. I have never heard of any Gen 3 idling that low, regardless of what the service manual says. Anyway, when we cold start this Viper, The needle goes up and the needle is right in the center of the gauge. I have not asked what kind of oil and filter the car has.

    So, for you twin turbo Gen 3 guys with built motors, does your oil pressure drop that low (14ish PSI) at warm idle? Thanks in advance.
    Last edited by 06SRTCoupe; 5 Days Ago at 07:14 PM.

  2. #2
    VOA Member
    since 2013
    99RT10's Avatar
    Join Date
    Oct 2013
    Armpit of the US
    They probably don't know, but ask what oil was used in the last oil change. On 2 of my TT cars, they were all built loose and require 20w50 oil. On my Gen 3,(522 UR built) with 20w50, oil pressure is 30+PSI when hot. I would not feel great if that oil pressure is with 20W50.
    09 ACR With all the goodies
    99 ACR TT 99 red RT/10 Roe S/C
    97 B/W RT/10 TT 94 RT/10 TT

  3. #3
    VOA Mamba Member
    since 2018

    Join Date
    Jun 2018
    My 88mm single turbo, built gen 3 engine in my roadrunner has about 15 to 18 psi oil pressure at hot idle with 15-50 and it has been fine after tons of street pulls and drag racing. I would only be concerned if it was that low anywhere above idle. It is 40 to 50 psi above 2000 rpm. It probably has to do with the clearances on the mains and rods. Boosted motors are set up loose anyways.
    2017 gts gunmetal pearl, sepia interior
    1970 roadrunner gen 3 viper swap big turbo
    2016 m6 hellcat challenger



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