how to get a turbo to spool faster

Posted by Kyromoto, Feb 28, 2010
Newbie Forum - Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum. Probationary Members must limit their tech posts to this forum and sub-forums.

  1. Kyromoto

    Kyromoto Proven Member

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    Fontana, California
    Ive been looking on the search and cant find anything on there. so im just wondering. besides getting bigger more free flow exhaust or a cold air intake. what else can you do to get your turbo to spool faster. Im fine with the PSI i get just want less lag LOL. o btw I have an evo 3 big 16g turbo on my 92 talon with greddy BOV, apexi exhaust system 3 inch. cut the air box and Maf mod. thank you for any info...
    #1
  2. RallyEclipse98

    RallyEclipse98 Proven Member

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    Lincoln, Nebraska
    No one complains about the E3's spool. If you have a manual maybe you should shift more.


    .......That or throw some nawszzzz at it.
    #2
  3. TSITurbo95

    TSITurbo95 Proven Member

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    Parkville, Maryland
    EVO3 has great spool time, if you want faster, I suggest going back to a t25 :)
    #3
  4. Jankenshank

    Jankenshank Proven Member

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    less lag than a e3?

    want to try a supercharger?
    #4
  5. RadDsm

    RadDsm Proven Member

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    Tigard, Oregon
    Check for boost leaks.

    If you have any way to control your timing, you can increase the timing a bit to help spool time.
    #5
  6. JusMX141

    JusMX141 Moderator

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    I've never heard someone with an Evo III 16G and stock cams complain about lag. Are you sure you don't have any boost leaks or pre-turbine exhaust leaks?
    #6
  7. knochgoon24

    knochgoon24 DSM Wiseman

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    Mt. Pleasant, Michigan
    You can get adjustable cam gears and mess with the timing of the cams.

    From: How to Tune Cam Gears on a 4g63t - My Pro Street
    #7
  8. Kyromoto

    Kyromoto Proven Member

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    Fontana, California
    I am thinking i might have a boost leak then. and trust me its not the shifting or driving. it spools slow. I had one boost leak directly off the intake side of turbo but i fixed that. Idk where any other ones wud be. I didnt have any leacks on my old stock turbo a couple days ago so i guess it has to be a leak somewhere I dont know about

    wait could it be that i still has stock TB elbow? my friend thinks thats y im getting slow spool. anyone else think that would restrict my spool?
    #8
  9. Gstclipse69

    Gstclipse69 Proven Member

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    Columbia, South_Carolina
    A stock throttle body elbow would have nothing to do with it. Boost leak test your intake tract as suggested. You'd be surprised what you will find.
    #9
  10. My1GLaser

    My1GLaser Proven Member

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    Bartow, Florida
    Your WG flapper is partially hung open.

    Do this.

    1. Make a sharpie mark from the flapper arm to the turbine housing.
    2. Take the small clevis pin out of the flapper arm and pull off the WG actuator arm.
    3. See how much the flapper arm moves until is it fully shut by referencing the sharpie mark.

    I had to shim my WG actuator off the compressor housing with about 1/8-3/16" worth of washers. This was on a brand new MHI Evo 3 16g. It didn't full boost until about 5k right out of the box. It went down to about 3200 after shimming the WG actuator.
    #10
    95ttalontsi likes this.
  11. Kyromoto

    Kyromoto Proven Member

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    Fontana, California
    ok. thanks
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  12. knochgoon24

    knochgoon24 DSM Wiseman

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    Mt. Pleasant, Michigan
    You may also have an exhaust leak. Just last night I was thinking how my car didn't have as much power as usual. Today I was checking the fluids when I noticed that 2 of the exhaust manifold bolts had backed off. I tightened those back up and all is well again.
    #12
  13. Kyromoto

    Kyromoto Proven Member

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    Fontana, California
    ok ill give that a check as well. thanks

    update. a couple nuts on exhaust mani were lose and one lose on the turbo to exhaust mani. fixed those. feels a little better but still slower then it should be. i dont hit max boost untill like 3500 ish
    #13
  14. FLASH1970

    FLASH1970 Proven Member

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    Lake Geneva, Wisconsin
    I'd put the stock turbo back on until you upgrade your fuel system. And get a wideband. And get a way to tune your car. And get a data logging setup. Until you do at least those upgrades there is no point in throwing on a bigger turbo. Your just going to hit fuel cut and run lean.

    But, if you have your heart set on blowing up your engine, you can get the maifold ported, or an FP manifold, cams, head porting. Throwing nitrous might help spool it up too. But full boost at 3500 isn't bad.
    #14
  15. 92_6bolt_1290

    92_6bolt_1290 Proven Member

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    Jenison, Michigan
    Are you running your stock exhaust manifold or O2 housing?
    upgrading to the Evo3 manifold and O2 housing help out a good bit to decrease turbo lag, otherwise the idea of an aftermarket FPR probably wouldn't hurt your cause. if you go the route of getting a fuel pressure regulator then make sure you can get one thats rising rate as well as adjustable
    #15
  16. welfle18

    welfle18 Proven Member

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    Norwalk, Ohio
    I agree that 3500 full boost is pretty good. I had a 50 trim and got full boost at 3800 (20psi). Do a boost leak test. Mine leaked like crazy from the bov flange and the throttle body gaskets.
    #16
  17. Nati0nalxCrisis

    Nati0nalxCrisis Proven Member

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    Mukwonago, Wisconsin
    ROFL



    Or you could always try a 14b, spools as soon as you hit the gas. But I wouldn't be too mad about the spool on an E3, the difference between a 14b and E3 would be huge. Your great where you are man.
    #17
  18. donniekak

    donniekak DSM Wiseman

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    Surprise, Arizona
    If 3500 rpm full boost isn't for you, i suggest a v8.
    #18
  19. ziggo0

    ziggo0 Proven Member

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    La Porte, Indiana
    There might also be an underlying problem.

    The 2.4L stroker in the SRT4 spools the same sized turbo right around 3000rpm, move to a 2.3L stroker and you should see better spool time. Cams too.
    #19
  20. gstryyder

    gstryyder Proven Member

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    El Cajon, California
    a relatively easy way would be to get some evo 560's a 2g maf and a wally 190. wideband or logger would do some good and an safc.what type of boost controller are you using? and still... have you checked for boost leaks? are the only mods you have what are listed in your profile? and also what spark plugs you are running? and what type of E3 turbo is it??creating more tension on your wastegate flapper to keep closed longer will have its neg- effects but will help with spool time. if there is a step on your turbine housing of the turbo you can insert a ring... or port it for smooth transitioning. i know it is an oddball question... what clutch n flywheel do you have on your car? is your bov vented? and how much boost are you running?
    #20
  21. 1gDSM4g63

    1gDSM4g63 Proven Member

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    San Jose, California
    If you think that 3500 rpm is laggy just switch to another, a twin turbo v6, v8, or hell strap a rocket on your car!

    [​IMG]
    #21
  22. chanley talon

    chanley talon Proven Member

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    I recently installed a water/methanol kit on my car. I have a automatic dsm awd with a knock off evo3 turbo. It seemed to spool slower than the original evo3. However i ran alcohol and methanol and a little water and the spool is ten times faster. I have never drove a car that felt like this. But if you can afford a water/meth kit you will never ever regret it they are GREAT!
    #22
  23. Kyromoto

    Kyromoto Proven Member

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    Fontana, California
    I dont have a MBC on atm. I didnt want higher boost so im leaving it off for the moment. and im checking boost leaks tomorrow as soon as i can build a checker. yes and i just updated my profile those are the current mods atm. im running oem ngks. the turbo is big 16g evo 3 turbo, with double turbine fins. I have standard clutch and flywheel. but the clutch looked relativly new (just bought this car and rebuilt almostEVERYTHING)the BOV is a GReddy and what do you mean vented? it has a nipple on it that you can turn for harder or softer? and i only have stock boost gauge so im not sure how accurate it is atm. but im guessing around 14??? untill i get my new boost gauge i wont really know. but the top end of this turbo as is boosts real hard. just takes a while to kick in as oppose to my gsx with same turbo it spooled like bat outta hell.
    #23
  24. 1gDSM4g63

    1gDSM4g63 Proven Member

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    San Jose, California
    I don't what you're talking about. Methanol kit does not help better the spool time. It's main purposes is to push out more psi which equals more power.
    #24
  25. wowzers

    wowzers Probationary Member

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    You could try the Cyclone Intake manifold mod...Where theres flappers that are closed at low RPM to help the spool...My buddy on this site untouchablecc i belive his name is has a eBay 16g with this Cyclone Intake mani mod and he sees full spool way before 3500 If im not mistaken Its around 3k for full spool if I remember correctly...If someone who has more experence with this Intake please chime in. Thanks
    #25

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