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GVR-4 300hp build

Posted by bormikstel5, Jul 19, 2020

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  1. bormikstel5

    bormikstel5 Probationary Member

    1
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    Joined Jul 19, 2020
    usa, New York
    I just got a hold of a 4g63t engine from an eclipse and wondered what to do to make it a reliable 300hp+ engine as I might have to use it in an evo.
    speed test
     
    Last edited: Jul 21, 2020
  2. 609DSM

    609DSM Proven Member

    365
    143
    Joined Aug 13, 2019
    Langhorne, Pennsylvania
    On the front page further down to the bottom of the thread links are stickys, there should be one with generalized upgrades and the hp range from those mods. There are a lot of build paths to go down to achieve your goal, just look on the site 300hp goal or do some research. I don't know enough to say "get this set up with this pump and injectors and a tune".
     

    Street Build 248  2

    1995 Eagle Talon TSi AWD
    awd · manual · 2G DSM

    Street Build 393  1

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM
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  3. Evolving_sti

    Evolving_sti Proven Member

    357
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    Joined Apr 28, 2019
    DANBURY, Connecticut
    What evo is it going in? Usdm evos and eclipse motors have the tranny on opposite sides. Idk if that is able to work. Are you looking for 300 crank or wheel? I dynod at 320whp on my gst so I can tell you my mod list. Even to break into the 300s it does get pricey if you buy quality parts and not ebay knock off stuff.
     

    571  6

    1999 Mitsubishi Eclipse GST
    320 whp · 315 lb/ft · 2G DSM
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    609DSM likes this.
  4. JusMX141

    JusMX141 Moderator

    14,946
    861
    Joined Dec 13, 2005
    Greensburg, Pennsylvania
    An Eclipse engine won't work in any Evo IV-IX model.

    300hp is a Small 16G, fuel system upgrades, a tuning platform, and a decent FMIC.
     

    3K  0

    1998 Mitsubishi Eclipse GST
    manual · 2G DSM

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    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

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    1992 Eagle Talon TSi
    manual · 1G DSM

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    1993 Eagle Talon TSi AWD
    manual · 1G DSM
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  5. Evolving_sti

    Evolving_sti Proven Member

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    Joined Apr 28, 2019
    DANBURY, Connecticut
    Gona need a little more than that. Bigger exhaust system , downpipe, should change to a more free flowing exhaust manifold. More than likely need a clutch upgrade. Idk what the stock clutch can hold but I doubt its much more than stock. I went with a garrett big t28 since its direct bolton. Pricey yes , but it reached my goals and direct fit. Should get a wideband gauge atleast. I would get a boost gauge aswell. I suffered from extreme overheating due to the fmic. Hopeully you don't, but if you do gona have to upgrade the cooling system. The temp gauge doesn't start moving till the car is way hotter than one would want. Check in dsmlink to see what its actually reading.
     

    571  6

    1999 Mitsubishi Eclipse GST
    320 whp · 315 lb/ft · 2G DSM
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  6. JusMX141

    JusMX141 Moderator

    14,946
    861
    Joined Dec 13, 2005
    Greensburg, Pennsylvania
    Exhaust is like a step 1 modification...and a freer-flowing exhaust manifold does nothing but cost spool at the 300hp power level. A crack-free stock manifold with the collector ported to match the inlet of the turbine housing is plenty.

    Same goes for the clutch- you're not going as far as swapping engines and upgrading turbochargers sticking with a stock clutch...although in reality the Evo IV-IX come from the factory with a turbo that's larger than both the Small 16G and T28 so if that's really what the engine is going into (somehow) then the stock clutch would likely be fine.
     

    3K  0

    1998 Mitsubishi Eclipse GST
    manual · 2G DSM

    6K  14

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

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    1992 Eagle Talon TSi
    manual · 1G DSM

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    1993 Eagle Talon TSi AWD
    manual · 1G DSM
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    1990TSIAWDTALON likes this.
  7. Evolving_sti

    Evolving_sti Proven Member

    357
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    Joined Apr 28, 2019
    DANBURY, Connecticut
    He said he has an eclipse engine, so its not gona mate to a evo usdm trans. A stock usdm evo clutch will handle it. My evo makes 348wtq on stock clutch. If he wants to stick to stock manifold so be it. I wouldn't. I upgraded to an FP log. My turbo spools just fine with the manifold and bigger cams. Most people here didn't think i would make over 270ish on my mods. I made 320.
    https://www.dsmtuners.com/threads/guess-the-hp.528587/#post-153763819
     

    571  6

    1999 Mitsubishi Eclipse GST
    320 whp · 315 lb/ft · 2G DSM
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  8. JusMX141

    JusMX141 Moderator

    14,946
    861
    Joined Dec 13, 2005
    Greensburg, Pennsylvania
    It's been proven the FP race manifold costs spool and midrange on a wide range of turbos, so it makes no sense to use it on a turbo that doesn't make big numbers above a midrange powerband. We put one on a 16G-powered auto street car expecting top-end gains and went from making 12.3/12.4 @ 113/114 passes pretty consistently to no longer being able to get on the converter, 2.3 60fts and 13.3 passes at 108mph. Put the ported 2G manifold back on and the car went right back to where it was before. A small turbo doesn't benefit from a large-runner, merged-collector race manifold which trades velocity for flow much like a 16G car wouldn't benefit from 288 cams.

    http://morrisonfabrications.com/tech/dsm-stock-replacement-manifold-back-to-back-dyno-testing/
     

    3K  0

    1998 Mitsubishi Eclipse GST
    manual · 2G DSM

    6K  14

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    3K  0

    1992 Eagle Talon TSi
    manual · 1G DSM

    3K  0

    1993 Eagle Talon TSi AWD
    manual · 1G DSM
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    1990TSIAWDTALON and 609DSM like this.
  9. Evolving_sti

    Evolving_sti Proven Member

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    DANBURY, Connecticut
    Oh idk then. I only go from my personal experiences and what the people around me recommend. The stock t25 on stock cams , stock manifold , and a 60mm exhaust netted me an embarrassing 211 whp with the tq falling flat on its face at the top end. My redline was set at 6k rpms caus it was was running out of steam.Now I hold power all the way to 6800. I mean the graphs speak for themselves. I dont think a slightly bigger turbo and bigger exhaust system will net me over 109 whp alone. Again just my experiences. Everyone here told me 550 cc injectors also weren't good enough to break more than 270whp. My tuner told me 550s were good for close to 350. He was right.
     

    Attached Files:

    571  6

    1999 Mitsubishi Eclipse GST
    320 whp · 315 lb/ft · 2G DSM
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  10. JusMX141

    JusMX141 Moderator

    14,946
    861
    Joined Dec 13, 2005
    Greensburg, Pennsylvania
    I've seen cams alone give a 52whp gain on a Mustang dyno with a 100% stock car, so anything is possible. Going from a 38mm TB2566 to a 47mm TB2578 isn't exactly a "slightly bigger" turbo, by the way. You had to be driving those 550's pretty hard to make those numbers...but there was a time when Buschur went 7's on a HKS VPC and a 660cc injector chip so again- anything is possible depending what pump volume you have behind the injectors and how hard you're driving them.
     

    3K  0

    1998 Mitsubishi Eclipse GST
    manual · 2G DSM

    6K  14

    1997 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    3K  0

    1992 Eagle Talon TSi
    manual · 1G DSM

    3K  0

    1993 Eagle Talon TSi AWD
    manual · 1G DSM
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    1990TSIAWDTALON and CrackedDSM like this.
  11. Evolving_sti

    Evolving_sti Proven Member

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    Joined Apr 28, 2019
    DANBURY, Connecticut
    255 walbro. And I'm only running BC stage 2s. Nothing aggressive. The deatschwerks 550cc injectors are considered stock replacements for an evo. My stock evo injectors are almost maxed. My eclipse made alot more power on the setup but my tuner brought it down for safety
     
    Last edited: Jul 19, 2020

    571  6

    1999 Mitsubishi Eclipse GST
    320 whp · 315 lb/ft · 2G DSM
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