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.60 Hot side? or .42 hot side?

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    .60 Hot side? or .42 hot side?

    I`m, planning to install a new turbo in my engine, i had eta Shortblock and i Head, Motronic , and right now it has an .60 Hot side, .48 Cold side T3 Turbo, , S2.93 diff, feel like need more boost, but dont like Lag, i`m starting to pressure it at 3200rpm, need something better, i have an .53 Cold side ready to go!, but i dont know if i have to change my Hot side, what do you thing?, want to run 10psi with stock ECU, stock injectors, Stock MAF.

    I`d change the diff, because with S3.73 there where no fun at all....

    sorry my bad english.
    e30 325i 1988 track toy
    e30 M3 1989 M106 motronic swap (in process)
    e36 M3 1995 S50B30 turbo
    e38 750il M73N
    Toyota Tundra 2UZFE (workshop car)

    BMV Motorsports Guatemala

    #2
    you will want to run .60 hot side, and even that is to small. It will choke the power off right at 5900-6000 rpms.

    Ideally for our engines we need a .82 hot side for full power potential. you want it to spool up faster use a dual ball bearing turbo with a cold side .48 for lower boost <10psi, .53 for higher boost >10psi.

    All-Red/MHW style Professional Tinted Tail lights
    PnP EMS, fuel injectors, wideband o2 systems

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      #3
      Ok, what about an .60 on cold side? with an .53 hot side?
      e30 325i 1988 track toy
      e30 M3 1989 M106 motronic swap (in process)
      e36 M3 1995 S50B30 turbo
      e38 750il M73N
      Toyota Tundra 2UZFE (workshop car)

      BMV Motorsports Guatemala

      Comment


        #4
        i have a .82 hot with a 60 cold and it feels good on 9 psi , it feels as if it wouldn't choke till 8 or 9 thousand rpm if i could rev that high .
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        mods: just meat and potatoes under the hood and wheaties on fire out back ;)

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          #5
          Would the T3 "Super 60" be any different?

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          Thanks for 10 years of fun!

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            #6
            Originally posted by blueapplesoda View Post
            you will want to run .60 hot side, and even that is to small. It will choke the power off right at 5900-6000 rpms.

            Ideally for our engines we need a .82 hot side for full power potential. you want it to spool up faster use a dual ball bearing turbo with a cold side .48 for lower boost <10psi, .53 for higher boost >10psi.
            I agree with this.

            I was gonna run a twin scrool Holset HX40 on my M20 but never got all the way around it to.
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