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Thread: 2.5" or 3" exhaust on 4bd1 T

  1. 12th August 2006, 07:17 PM #1
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    2.5" or 3" exhaust on 4bd1 T

    just a quicj question if peoples think a 3" mandrel might be overdoing it on a 4bd1 turbo?

    currently have a 2.5" non mandrel.
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  2. 12th August 2006, 07:54 PM #2
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    go the 3in

    free flowing exhaust .............hmmmmmmmmmm love the note
    130's rule
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  3. 14th August 2006, 06:59 PM #3
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    Hey, def-90, been wondering about this myself, had any feedback off forum?.
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  4. 14th August 2006, 08:11 PM #4
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    BEST mod so far to my Tdi Rangie was the 3" mandrel bend exhaust - less turbo lag and torque is now lower down the rev range

    LRH
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  5. 14th August 2006, 08:14 PM #5
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    aha nothing like a ''pack a day'' whesse hey mark??
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  6. 14th August 2006, 08:40 PM #6
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    eh?
    Disco 4 SDV6 Auto
    Disco 4 SDV8 Dual Cab Project
    Disco 2 M57 Extra Cab Project
    Foton Tunland Cummins ISF
    Disco 1 3 door 4.6 V8 Auto
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  7. 15th August 2006, 03:52 PM #7
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    turbo spool fool turbo spool!

    geez
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  8. 15th August 2006, 05:09 PM #8
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    Exhaust

    Def-90

    I am currently running a 2.5" straight through on our 4BD1T in a Rangie and it performs very well. I think for the money and the type of engine you would be wasting money on a mandrill bent system. I gained a lot more power reducing the size of the turbo and modifying the inlet to the turbo which in turn causes the turbo to spool up very quick, which is good when you only have 0-2700rpm to play with.

    Regards Justin
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  9. 16th August 2006, 04:48 PM #9
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    exhust

    thanks for the input guys, prob not 100% worth it but may decide t do it anyway depending on what the quotes come in at, i have a friend that tells me he can get it done very cheaply...

    it also will depend upon if i can get my dump pipe enlarged as well? it's pretty tight where she runs.

    DRanged u coming this weekend for a play to cruiser...i think u should, i'd like to c ride in another 4BD1T to compare...
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  10. 16th August 2006, 05:04 PM #10
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    Def90
    It's definatly worth it, I've converted a couple (including my own ) to 3" and the dyno dosn't lie! Go the full flow system.

    Dranged
    I'm looking into the R380 conversion to go behind my 4bd1-T, a couple of Q's if you have time. What high range ratio are you running in the 230? and what sort of fuel consuption dose your rig get? I've heard good reports about the conversion, what's your thoughts?

    TIA

    Cheers Larns
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