Too much oil pressure on the beater?

Discussion in 'Street/strip 400/430/455' started by CJay, Aug 7, 2018.

  1. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Yes!:D

    I have about 55 psi at 2500 RPM, I never worry about my oil pressure. I NEVER beat on the engine until I see the oil come up to temperature.
     
    john.schaefer77 likes this.
  2. Doo Wop

    Doo Wop Where were you in '62?

  3. Doo Wop

    Doo Wop Where were you in '62?

    Buyer Beware: Diesel oil has changed

    If you use diesel engine oils in your car for their higher levels of anti-wear additives than found in off-the-shelf standard engine oils, it’s time to consider a change. The American Petroleum Institute has adopted two new heavy-duty engine oil categories that increase the importance of seeking out an engine oil containing the correct formulation of detergents and ZDDP for your application.

    ZDDP, or Zinc dialkyldithiophosphate, is an anti-wear additive that has been reduced in all engine oils through the years to help extend catalytic converter life and lessen harmful emissions. The ZDDP reduction in gasoline engine oils particularly spelled trouble for older — think flat tappet camshafts — and high-performing engines, however, leading owners to opt for diesel engine oils that contain higher levels of the additive.

    Certified Lubrication Specialist Lake Speed Jr. explains ZDDP creates a sacrificial film on contact points that acts as a wear surface in place of the metal. As ZDDP is reduced or more detergent is added, that film can decrease and component wear increase.

    Substantial chemistry changes in the new diesel engine oil categories mean the widely accepted use of diesel engine oil plus ZDDP additive during the break-in process is now a riskier proposition than it was a few years ago.
    “Diesel oils are becoming more specific to applications, and people using them off-label need to be aware,” says Certified Lubrication Specialist Lake Speed Jr.

    The American Petroleum Institute’s new heavy-duty engine oil categories effectively eliminate backwards compatibility in the industry. CK-4 is the replacement for current diesel engine oil categories, while FA-4 is a new category altogether, created in response to updated greenhouse gas (GHG) emission standards affecting engines to be manufactured in 2017 and after.

    Speed says owners should just steer clear of diesel engine oil in their gasoline engines and pay close attention to new labeling if using diesel engine oils in their towing vehicles.

    “This really is risk management,” says Speed about the importance of protecting engines with the right oil, from the start. “Curveballs are being thrown here. So, buyer beware.”

    He recommends during the break-in process owners turn to a ZDDP-enhanced oil rather than the new diesel engine oil options to improve surface mating and extend the durability of internal engine components in their new or rebuilt engine.

    Driven Racing Oil offers break-in oil — actually a trio of products designed for different applications — as well as both synthetic and conventional oils specially formulated for street performance, hot rod, competition and race, and small and power sports engines.

    This entry was posted in Tech Bulletins, Training Center and tagged API, diesel oil, ZDDP on April 19, 2016 by cbullion.
     
    alvareracing and sriley531 like this.
  4. BQUICK

    BQUICK Gold Level Contributor

    Old thread but if your pressure hot tops out at 50psi you will be fine if you never rev beyond 4500 rpm. But if you ever want to rev to 5500-6000 you need 65-80 psi due to the large journals on the crank and the way the oil is fed to the bearings. 12lbs per 1000 rpm NOT 10lbs per 1000 which is more than enough for a SBC or BBC but not a Buick.
    Had a great talk with Dennis Manner at the Nats about this......
     
    alvareracing likes this.
  5. CJay

    CJay Supercar owner Staff Member

    I love it when old beater threads pop up randomly
     
    sean Buick 76 and Max Damage like this.
  6. Fred Hickey

    Fred Hickey Founders Club Member

    So to recap, the Beater is just right?…I think so.
     
  7. BQUICK

    BQUICK Gold Level Contributor

    Do whatever you like in regards to oil pressure.....just trying to save another 455 from the dumpster.....
     
  8. BrianTrick

    BrianTrick Brian Trick

    The big main is why I focus more on volume than pressure. A few ways to skin the cat,but don’t mix the methods.
     
  9. CJay

    CJay Supercar owner Staff Member

    I think so too!
     
  10. BQUICK

    BQUICK Gold Level Contributor

    According to Denny volume is good but you need a certain amount of pressure to over come the centrifugal force trying to sling oil out of the bearings.
     
  11. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    AFAIK, volume and pressure go hand in hand. If you try to push more volume into a confined space, you get pressure. If you have a leak in that confined space, you lose pressure. Bigger leaks, more pressure loss. Bigger confined space, needs more volume to generate the same pressure. Think of the confined space as bearing clearances, and the leaks as oil hemorrhage from said clearances (including excessive oil pump end clearance). If the oil pump cannot generate sufficient volume to make the needed pressure, then your clearances are too large and/or you are hemorrhaging too much oil, hence the need for the HV/HP pump gears to generate MORE volume with bigger bearing clearances to generate sufficient pressures. That's the way I understand it anyway. If I am wrong, I'm sure the engineers out there will correct me.:)
     
    Last edited: Jul 13, 2021
    Alexandre Cesa likes this.

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