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Thread: twin Vs Single turbo's

  1. #1

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    twin Vs Single turbo's

    I have done a search on the net and i seen some discussions but no real details..

    SO...

    whats the main benifits of going from twin to single? also is it overly hard to do?

    pros vs cons please.

    mever mind i found the thread for the 1st g8 single turbo lol time to read it http://www.clubvr4.com/forum/showthr...t=single+turbo

    mods feel free to delete or lock

    day dreaming of 13b's , huge ports and suicide doors, and a few other things too I cant say here.

  2. #2

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    single cons:

    long piping
    hot engine bay
    lag
    inefficient
    horrible ugly piping

    single pros:
    cheap

    reverse them for the twin cons and pros

  3. #3
    Subaru ETA's Avatar

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    in mikes car there isnt that much lag..i mean yes there is more lag then the std set up but not as much as i expected.

    when it comes under boost tho, you are are pinned back in your set right up to the red line

  4. #4
    Gly's Avatar

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    Quote Originally Posted by bradc
    single cons:
    long piping
    depends how its done, but its not too bad.

    Quote Originally Posted by bradc
    single cons:
    hot engine bay
    no worse than the twins,

    Quote Originally Posted by bradc
    single cons:
    lag
    depends what turbo you use.

    Quote Originally Posted by bradc
    single cons:
    inefficient
    compared to???...

    Quote Originally Posted by bradc
    single cons:
    horrible ugly piping
    it can be done nicely, with time and effort.
    the twin pipeing isnt exactly pretty

    Quote Originally Posted by bradc
    single cons:
    single pros:
    cheap
    easier rebuilds/servicing
    easier to get one big single in rather than 2 mid sized units
    **** factor/cool factor is greater



    twin cons...

    just as hard if not more difficult to set up,
    space/size limits, just as much pipe work to be done.
    2x as many turbos to break. and harder to service/rebuild

    twin pros...

    its still twin turbo

  5. #5

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    I linked to the APS website a while ago when they compared their Single setup to their Twin setup on a 350Z, they stated that the single kit is capable of flowing the same, but it has 500rpm more lag and that it always will be like that on a V6 due to the increased length in exhaust piping as well as the extra inertia of a single large turbine.

    Ohh and Mike's engine bay is a LOT hotter than any other VR-4!

  6. #6
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    Again?
    Last edited by valmes; 23-07-2008 at 11:51 AM.

  7. #7
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    V6, V8 - Twins
    I4, I6 - Single

  8. #8
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    Quote Originally Posted by valmes
    V6, V8 - Twins
    I4, I6 - Single
    What you trying to say VAL


























































  9. #9
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    Babelfish it!

  10. #10
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    Quote Originally Posted by valmes
    Babelfish it!
    V6, V8 - близнецы I4, I6 - определяют

  11. #11
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    Quote Originally Posted by Valmes
    V6, V8 - Twins
    I4, I6 - Single
    I agree...but I'm curious: what's your logic, dude?

  12. #12
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    Quote Originally Posted by Turbo_Steve
    I agree...but I'm curious: what's your logic, dude?
    I would say because of length of pipe to supply the Tubs..

    Inline - all off 1 bank supplying 1 Tub.. Short..

    V- Tub off each bank.. Short


    1 tub supplied by to banks means lengthening the supply pipe..

    2 tubs supplied by 1 bank means more pipeage and more work !!

    I'm prolly totally wrong But thats my fix on it

  13. #13
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    That's partly my thinking, as well as pulse timing and so on. Also, with an I4 or I6 you're a lot more likely to be able to set it up "twinscroll" as opposed to a single exducer runnel.

    Complicated business, turbo sizing, though.

  14. #14
    Wodjno's Avatar

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    Quote Originally Posted by Turbo_Steve
    That's partly my thinking, as well as pulse timing and so on. Also, with an I4 or I6 you're a lot more likely to be able to set it up "twinscroll" as opposed to a single exducer runnel.

    Complicated business, turbo sizing, though.
    Would it be possible to fit 2 x VGT's to the VR4 ? Or is there more involved than just slapping them on

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    Yeah wodj has it! On an I6 (read skyline) it is easy to make it single if you want to, the turbo can be nice and close to the exhaust manifold. But Nissan still made the GT-R with twin turbos because they knew it would spool better.

    Nissan are smart, Mitsi are smart How many HIGH performance V6's can you think of with single turbos? Most have twins, and even some I6's have twins, including the new BMW I6 3.0 twin turbo engine featured in the 135i and 335i amongst others.

  16. #16
    Turbo_Steve's Avatar

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    I figured it was something like that.
    Interestingly, the 300ZX effectively has two engines linked at the crank: Two exhausts, turbos, intercoolers, throttle bodies, inlet manifolds, dumpvalves, EGR, recirc everything.

    Yet by the time they're producing the GTR, they've gone for a pair of ceramics on an inline 6 with sequential loading,

    And then we get the NEW GTR, which is a V8 with twin turbos, one per bank, intercoolers etc. i suspect there is no "best" way: just different charecteristics.

  17. #17

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    the turbos on a GTR were never sequential, and the new gtr is a v6

  18. #18
    Wodjno's Avatar

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    Quote Originally Posted by bradc
    the turbos on a GTR were never sequential, and the new gtr is a v6
    Yup

    A Lil ole 3.8 V6 Twin Turbo

    Looks like Mitzy got it right the 1st time round with the VR4

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    hehe yep! pity we don't have a longitudinal engine, rear 6 speed dual clutch transaxle at ~480hp though!

  20. #20
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    Quote Originally Posted by bradc
    hehe yep! pity we don't have 480hp though!
    You're working on fixing that problem though aren't you brad
    1994 Galant VR-4, 6A13TT conversion 230kw atw
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