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2.7L 3rz Question

Discussion in '4 Cylinder' started by Scosh, Feb 2, 2010.

  1. Feb 2, 2010 at 4:29 AM
    #1
    Scosh

    Scosh [OP] Well-Known Member

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    I have an 02 Prerunner with a 2.7L 3rz. From reading around, I read that it is safe to constantly hit the rev limiter because it is so underpowered. Is this true? I haven't tried it myself, but I would like to when I am offroading.:)
     
  2. Feb 2, 2010 at 4:34 AM
    #2
    Scosh

    Scosh [OP] Well-Known Member

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  3. Feb 2, 2010 at 8:21 AM
    #3
    dually

    dually Low and slow

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    being underpowered has nothing to do with it. A rev limiter is in place to prevent damage. I definitely dont suggest running at redline for a lengthy amount of time.
     
  4. Feb 2, 2010 at 1:57 PM
    #4
    Scosh

    Scosh [OP] Well-Known Member

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    Oh, I was just wondering. I didn't plan on doing any of that.
     
  5. Feb 2, 2010 at 5:32 PM
    #5
    Isthatahemi

    Isthatahemi Well-Known Member

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    The strength of the 3RZ, and the fact that the rev limit is rather low mean that being on the limiter will not harm the engine. But wear is cummulative, and over time will accelerate the wearing out of the engine.
     
  6. Feb 3, 2010 at 1:30 PM
    #6
    DGXR

    DGXR Well-Known Member

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    As others have said, I don't recommend spending much time at/near the redline but occasional bumps off the limiter aren't going to hurt anything. That's what the limiter is for - to prevent damage. Besides, the real usable power tapers off before 5.5k rpm anyway. I've heard stories about people abusing the 2.7L that made me cringe, seriously. Some race shops are building 1200hp drag motors with them. No I don't believe everything I read, but considering there are *so* many accounts of the toughness of these engines, mine will probably outlast the rest of the truck. 4-banger all the way. :)
     
  7. Feb 3, 2010 at 7:10 PM
    #7
    dually

    dually Low and slow

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    for the record, 2.4 is more stout than the 2.7. Rod failures on the 2.7 when under boost.
     
  8. Feb 4, 2010 at 12:30 PM
    #8
    beastlytaco

    beastlytaco This is TW. One never knows what is a joke anymore

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    is that with stock rods? or aftermarket?
     
  9. Feb 4, 2010 at 12:31 PM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Depends on the amount of boost. I ran 6 psi in mine for over 85k miles, with no issues.
     
  10. Feb 4, 2010 at 12:34 PM
    #10
    beastlytaco

    beastlytaco This is TW. One never knows what is a joke anymore

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    yeah its like hondas..they can run a good bit of boost on a stock engine..
     
  11. Feb 4, 2010 at 3:43 PM
    #11
    dually

    dually Low and slow

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    Yeah true, cruzinlife over on CT blew two 3rz's both with rod failures. He had a killer setup too, no knock. I think he only pushed 9-12lbs... shit happens though!
     
  12. Feb 4, 2010 at 4:36 PM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    The 2.7 does have forged rods. Crank too. Just not the pistons.
     
  13. Feb 4, 2010 at 5:13 PM
    #13
    dually

    dually Low and slow

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  14. Feb 5, 2010 at 12:29 PM
    #14
    DGXR

    DGXR Well-Known Member

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    OK that makes sense, the 1200hp drag motors were using the stock crank, block and head. Everything else was replaced with hi-po stuff (valves, rods, pistons, cams, etc). Even the crank was shaved down for lower weight, and balanced.
     
  15. Jul 9, 2010 at 6:39 PM
    #15
    toyotadan

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    you don't want to hit the limiter as it will cause premature wear
     
  16. Jul 11, 2010 at 8:59 AM
    #16
    xsvtoyz

    xsvtoyz Well-Known Member

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    try 18 psi and up I have had my 9psi s/c for 1 1/2 years and no issues
     
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