Jump to content
SAU Community

What not to do when your RB25DET gets rebuilt!!!

Steg33

By Steg33,
in Engines & Forced Induction

 Share

Recommended Posts

knore Grand Master

knore

Posted
Posted

Fair enough, info noted :D

Still though, i would be suspicious if me newly built engine blew up with forged internals without even revving over 5000rpm. As much as a computer could stuff things up, didnt you notice it detonating?

Mesmer Enthusiast

Mesmer

Posted
Posted

hmm after just ripping down my 25 not that long ago that screams fuel pump/system to me.

I was driving my car around for about 3 years with a autronic SMC getting experiance tuning the thing (read: screwing with the fuel/ignition maps :D ) finding out what works what didn't etc without a a/f ratio meter (yes yes i know exactly how stupid it was and it did end up costing me a engine) and my stock pistons didn't even look that bad.

So while a badly tuned ecu can kill a engine i think that looks alot more like a major lack of fuel not just a little to much timing (what most jap chips have) for it to kill forged pistons like that without any real abuse.

John

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Wazmond
      Stock rb25det neo questions

      By Wazmond · Posted

      A question for tuning awd, is it possible to disable the AWD? The stagea is an EA/T AWD, Toshi had said on a GTR, he was able to disable it and make it 2wd. Just wanted to double check if this was possible
    • Lithium
      Ceramic turbine damage to engine - what did yours do?

      By Lithium · Posted

      Whoa, that's a name I've not see for a long time! Sorry to hear about the engine / turbo damage.  Fwiw with any engine problems it often really a case of just seeing what happens when it's apart, ymmv - I wouldn't rule out the possibility that the damage isn't even from the turbo failure, or possibly from a combination.  The airflow between cylinders isn't dead even, injectors can go off over time as well, with the turbos overboosting if you didn't have upgraded fuel system there could have possibly been a bit of leaning out - stock triggering is often a bit unreliable by this age too.  Basically its an old engine and a few things could have been going on, and you won't know how much work is needed until the engine is apart.  
    • MBS206
      My BMW 335i

      By MBS206 · Posted

      I'm just shocked there's a euro driver on our roads who is thinking of other road users and not attempting to blind everyone. I wonder if Prank uses his indicator too...
    • Duncan
      So whats the deal with the porous block VR30DDTT

      By Duncan · Posted

      Its hard to tell really. The Q50 owner's forum talks about it a lot and has quite a few people directly affected, but no idea what % of cars sold actually had the block replaced. Also, there seem to be 2 distinct issues which both get diagnosed by Infiniti as requiring a block replacement (no wonder they are going broke) 1. "Porous block" where coolant mixes with oil through thin or poorly cast parts of the block 2. Head coolant gallery plugs not sealing. If I was noticing engine coolant loss I'd start with cooling system pressure test (as always) and then I'd pull the cam covers and reseal the coolant gallery plugs on both side before worrying about a potentially porous block.  If neither of those did the trick it would be put in a second hand engine out of japan; I haven't checked pricing but I'm sure there are plenty around by now as they've been in production 10+ years
    • Duncan
      Neil's R33 Gts-t Build

      By Duncan · Posted

      To clarify what I posted above, I thought you both had a situation where it cancelled sooner one way than the other.....if it is reasonably even where it cancels in either direction that is probably normal (consider gentle movements like lane changes, you don't want it to need half a turn of lock to turn the indicators off)
×
×
  • Create New...