NOS 455 shortblock

Discussion in 'Street/strip 400/430/455' started by Opa, Jan 10, 2012.

  1. flynbuick

    flynbuick Guest

    You would be better off with the factory stock cast iron intake. You might search here for information about that intake.
     
  2. 69GS400s

    69GS400s ...my own amusement ride!

    different topic, but do you happen to have any vaccum leaks as well ? I and others have had problems with the S-divider ... there was even a test long ago that showed a stock 455 intake flowed better than an S-divider

    ... just thinking - as long as you have the intake off :idea2:
     
  3. flynbuick

    flynbuick Guest

  4. Opa

    Opa Torque/a 8 piston figure

    :laugh: I knew that the S-divider was not as good as a B4B..but a stock intake is better? Did not know that, I think the intake stays on, the only intake I can get my hands on now that is suited for a Holley DP carb is a first run, Stage1 intake (now know as TA SP1). But that guy wants to trade it for a B4B!.:Do No:
    The S-divider will not be the oil consumption culprit, so if I can find another one that we can use with the Holley carb (its not my car we are working one) it stays one for know.
     
  5. Opa

    Opa Torque/a 8 piston figure

    The S-divider intake was used many years on my former 464 STG1 all iron engine. Best time was a 11.74 with this engine setup in 72 GS.
    My personal best time with it was a 12.32ET.

    We have another 71 455 in the shop it came out of a Electra this has the stock low profile intake. Mmm no Q-jets around when you need one.
    Oh well. let me see what I can come up with.
     
  6. GNandGS

    GNandGS Well-Known Member

    After install a de-carbon job might be a good idea. I liked the results from BG products but not sure is you have them there.
     
  7. Opa

    Opa Torque/a 8 piston figure

    After talking to the owner again, we found out that he didn't drive the car anymore with the 2 breathers and no pcv.
    So we gonna test drive it with that ourselfs for a 200 miles or so, and see what the oil consumption is.

    In fact the owner did give us wrong facts, when he drives 200miles the engine uses about half a quart of oil or a little more.
    I guess he thinks a "new" old type engine doesn't use any oil at all like a new engine does, and in fact new type engine do use more oil then 20 years ago not all but many do and is normal. I had a new VW caddy diesel an it used a quart of oil the first 1600miles I drove with it, the dealership that this was normal for these new high pressure injected diesel engines!

    So we gonna test drive it and see what the consumption is, so we can checked it ourselfs. Sometimes you can't rely on customers facts.
     
  8. LARRY70GS

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

    It doesn't matter. If there is no shield below the intake, the engine WILL use oil at an alarming rate, and the backs of the valves will be coated with carbon. Driving with no PCV will give you oil leaks, and contaminated oil.
     
  9. BQUICK

    BQUICK Gold Level Contributor

    Gotta disagree Larry....PCV is what sucks the oil in. Plug it and run breathers and my valves stay ALOT cleaner even with a baffle under the PCV. Why suck any blowby back into the intake?

    I agree if you run PCV you MUST have a baffle.

    PCV is an emission control device.....so any fumes are reburned. Sure it does pull some vacuum on the crankcase and helps prevent leaks but there shouldn't be any anyway.....
     
  10. LARRY70GS

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

    Bruce,
    You disagree just to disagree. :laugh: Do you have any cars that you drive on the street? Did you delete the PCV? I've seen a few guys do that. You know what, they get oil leaks, and oil in engine compartment, breathers and all.


    Robert asked why the engine was using so much oil. No shield under the intake, AND A FUNCTIONAL PCV. That's why. I don't believe he plugged the PCV with no change. I think he just wrote that because he decided that it wasn't the cause of the oil consumption, but IMHO, he was wrong.

    If you want to debate whether we should all not run a PCV in our street cars, I think you should just start a separate thread.:idea2:
     
  11. GNandGS

    GNandGS Well-Known Member

    RE-read what he posted. There is still testing to do which makes the bickering moot.

    Just a driver that puts around with good breathing may get away without PCV at least for a while to test some theories. Long term IMO, or for WOT, then PCV or even a pump is beneficial.
     
  12. LARRY70GS

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


    You don't get us N.E. guys. Nobody is bickering. You ought to see us at our meets. Bruce does this all the time. He likes to play devil's advocate.

    Testing of what? If you have a functional PCV system, and there is nothing to shield the valley, oil will be siphoned out of the engine, at a pretty alarming rate. I had this happen to me, and it ruined a very nice set of heads. Nothing that couldn't be fixed. All due to an inexperienced helper who didn't know any better.

    Robert posted about his oil consumption. That was the point of this thread. I feel confident that I gave him the solution. Anyone who feels they want to eliminate the PCV on their engine. Go for it. I would never do it on any street car.
     
  13. GNandGS

    GNandGS Well-Known Member

    "After talking to the owner again, we found out that he didn't drive the car anymore with the 2 breathers and no pcv.
    So we gonna test drive it with that ourselfs for a 200 miles or so, and see what the oil consumption is."
     
  14. LARRY70GS

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


    I'm not even sure what that means. Part of it, is bad English.


    What I saw was there was no shield under the intake. Go back and take a look at the pictures that I posted. That was a fresh set of ported Aluminum Stage1SE heads that flowed 313/225 @ .550. That is what they looked like after 1500-2000 miles.
     
  15. GNandGS

    GNandGS Well-Known Member

    It was suggested by others that they block the Pcv to test. That quote is the last update showing the test not yet done

    The rest of the post mentions that there were mistakes in the quoted consumption
     
  16. LARRY70GS

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


    Let me ask you something. Do you think that it is possible to run a BBB, with a fully functional PCV, and no shield under the intake, and not have it use quite a bit of oil? That is the question here. Just answer that for me.
     
  17. GNandGS

    GNandGS Well-Known Member

    <sigh> that wasn't being contested and I'm not arguing with that statement.

    Prior to doing any tear down I suspect they are hoping to confirm it is just a simple Pcv issue. Sucks to pull the intake and do the work when their might be more issues. Might not be so easy for them

    Of course that is a guess on my part. All I know for sure is the poster has said the Pcv has been eliminated for testing
     
  18. BQUICK

    BQUICK Gold Level Contributor

    Of course it will suck oil with no baffle. No debate there.
    Proper fix is a baffle but in the interim he could block PCV and run breathers.

    Both my drag cars run no PCV, no vacuum pump, no crankcase evacuation system.....and no leaks. And they run pretty well....for many years. :laugh: :bla:

    You can run 3 breathers: one on each valve cover and one in the PCV hole. That's what BQUICK has had for at least 6 yrs.....same motor.
     
  19. LARRY70GS

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


    I'm not talking about race cars Bruce. I'm talking about street cars. Would you/do you do that on your street cars? A race car is not a street car. You have turned this thread from "where is my oil going" to "should I run a PCV or not" I maintain that IF this person is burning oil at the rate described, and IF he has no shield under the intake, THEN that is the reason for the oil consumption. There is no reason to test any other theory. Could the cylinder walls be glazed? Sure they can. Is that even likely the cause for the oil consumption, IMO, NO. I got a better test. Put a shield under the intake, and see if the oil consumption is still there. Then go from there. You don't block off a PCV in a street car. It increases pressure inside the crankcase, and the oil gets contaminated faster.:bla:
     
  20. 462 Chevelle

    462 Chevelle 462 chevelle

    nu uh. :blast:
     

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