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  • Nitrous backfire(pictures)

    Alright, 100 shot jetted in, going for a test run. Bottle pressure at ~925 PSI, I stall the converter to about 2500, launch, hit the nitrous right at 3K RPM. It runs for maybe a second and I can see a flash(it is dark out), hear plastic cracking, and see some smoke. Engine stays running, it is just reved a little higher than it should be. I shut it off and stop the car, get out and look. I am back on my stock intake, and it is absolutely destroyed. Even worse, it shoved into the radiator support and fan. The car starts like a champ, it fires RIGHT up but in seconds it hits the 4K rev limiter so I think the IAC valve is stuck open. It starts fine and sounds good so I think my injectors and MAF are fine. As for vaccum lines, I put the one on top of the TB that looks like a small sparkplug boot back on, what other ones do I need to look for?

    Anything eles I need to check for?

    Picture of the damage

  • #2
    Very impressive explosion [img]smile.gif[/img]
    <--- is the master cause I shattered a connecting rod in half :D

    Vaccum lines I have experienced problems with:
    1) One that looks like a spark plug boot and it goes to the throttle body.
    2) One that goes to the master cylinder from the back of the engine. The black plastic bit that fits into the master cylinder
    3) One that goes to the stock fuel pressure reg on the passenger side.
    Race car - gone but not forgotten - 1997 firebird V6
    nitrous et & mph: 12.168 & 110.95 mph, n/a 13.746 & 96.38 mph
    2013 Dodge Challenger SRT8: 12.125, 116.45
    2010 Ford Taurus SHO: no times yet

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    • #3
      Whoops, forgot to post an update!

      It's all fixed now, but the culprit was the mother of all vaccum leaks!

      On the back of the manifold, there is a pressure sensor with two vaccum lines that is connected directly to a hole in the manifold about the size of a quarter. Well from the top it looked fine, but the last thing I had to do before I started unbolting the manifold was pull that thing, well the underside of it is completely blown off so it was just sucking air staight in the back of the manifold that the MAF could not account for on top of a huge vaccum leak.


      Picture of damage to MPS

      The car has been back on the road and spraying at the track for a while now socking it to the V8s.

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      • #4
        I destroyed one of those once also
        Race car - gone but not forgotten - 1997 firebird V6
        nitrous et & mph: 12.168 & 110.95 mph, n/a 13.746 & 96.38 mph
        2013 Dodge Challenger SRT8: 12.125, 116.45
        2010 Ford Taurus SHO: no times yet

        Comment

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