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GVR-4 what's my next step to start boosting up?

Posted by dsmania17, May 10, 2019

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  1. dsmania17

    dsmania17 Probationary Member

    15
    2
    Joined Jan 17, 2017
    sunrise, Florida
    I have had my vr4 for a while now and is time to put some hp down on the road all i have is exhaust turbo back and front mount pushing 12lbs of boost on stock turbo. Compression is 160 across the board, what would be my next step to start boosting up. Also my ecu has an eprom chip from factory.
     

    278  3

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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  2. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    4,559
    1,996
    Joined Nov 14, 2013
    Independence, Kansas
    More boost, bigger injectors and a way to tune it. You have a chipped ECU already, so a 1g ECMLink chip, if you can find it, plus the software and the cord so you can tune. :thumb:
     

    Street Build 3K  27

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    1998 Eagle Talon TSi
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    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM
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  3. ThunderChild

    ThunderChild Supporting VIP

    2,540
    714
    Joined Jan 5, 2012
    Rathdrum, Idaho
    +1 for ecmlink being the next thing you get, it's invaluable.
     

    Street Build 247  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    346  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

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    manual · 1G DSM

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    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  4. DSMReadyPerformance

    DSMReadyPerformance Probationary Member

    22
    0
    Joined Mar 3, 2016
    Accident, Maryland
    I would also say to get ECMlink but also a wideband and an mbc. What are your goals with the car? Looking for a fun daily or more than that?

    Anyways +2 on link! Lol
     

    Drag Race Build 899  1

    1992 Eagle Talon TSi
    awd · manual · 1G DSM
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  5. gdb1039

    gdb1039 Proven Member

    76
    25
    Joined Dec 16, 2007
    vancouver, Washington
    Dont forget to upgrade the fuel pump.
     

    Street Build 989  9

    1995 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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  6. Bo0sTeD 4G63

    Bo0sTeD 4G63 Supporting Member

    309
    58
    Joined Aug 31, 2008
    Miami, Florida
    You will need to upgrade fuel pump, injectors, boost controller, wide band and some type of logging system.
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
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  7. dsmania17

    dsmania17 Probationary Member

    15
    2
    Joined Jan 17, 2017
    sunrise, Florida
    ok so i got 550 injectors a walbro 255 fuel pump a turbonetics manual b/c, i also ordered a FP black turbo and fp exhaust manifold. im installing the fuel pump today. The injectors i will wait until i get some kind of tuning system. i was hoping instead of ecm link just to send the ecu and have the eprom programmed to what i have in the car no one does that any more.
     

    278  3

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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  8. llxkevinxll

    llxkevinxll Proven Member

    231
    90
    Joined Jan 29, 2012
    Cleveland, Ohio
    Just as an FYI, 550s paired with an FP black may not be the best combo. 550cc injectors can support roughly 32 lb/min of airflow at 80% IDC. The FP Black is a ~70 lb/min turbo. You'd be leaving a ton of airflow on the table and sacrificing a lot of spool and responsiveness.

    Injector sizing
     

    Autocross Build 2K  3

    1996 Eagle Talon TSi AWD
    13.06 @ 105.75 · 2G DSM

    Street Build 1K  1

    1992 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM
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  9. Mello

    Mello Proven Member

    952
    233
    Joined Jul 4, 2003
    Albuquerque, New Mexico
    You wil need much larger injectors than 550cc for the FP Black. Depending on fuel you should consider 1650 or even 2150. Also the 255 pump may not be big enough. Have you set goals for your upgrade path so you can identify all the proper mods necessary to achieve your goals?
     
  10. DSMAvenger

    DSMAvenger Proven Member

    32
    1
    Joined Feb 18, 2008
    SeaTac, Washington
    Nobody does it anymore because that kind of tune is just a "ballpark" tune, and ECMLink is both readily available and relatively inexpensive. The market dictates what stays available

    CG
     
  11. gdb1039

    gdb1039 Proven Member

    76
    25
    Joined Dec 16, 2007
    vancouver, Washington
    I highly recommended that you decide on a horsepower goal and how you plan to use the car. Be realistic as to what you want to do. The worst thing you can do is start throwing mismatched parts at your car expecting big numbers and not blowing the car up. 550cc injectors with a fp black on a stock motor and improper supporting mods is a receipe for disaster. Before you start ordering parts do your homework on the mods you want, see what requirements are needed to run them. Remember your car is a dying breed, parts are getting harder to find and more expensive. Spend the extra time and money to preserve it and build it right.
     

    Street Build 989  9

    1995 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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  12. dsmania17

    dsmania17 Probationary Member

    15
    2
    Joined Jan 17, 2017
    sunrise, Florida
    good looking out gdb1039.
     

    278  3

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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