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  1. #1
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    Default Vortech S trim and engine questions

    Just wondering what everyone is using when it comes to pulley size. Right now Iíve got the 6.66 crank and 3.33 SC pulley. Not sure what sizes will do for boost. Iím taking to ASP for a crank pulley to fit over an ATI, theyíre asking what size but Iím not sure what size to get.

    Also, Iíve got a sheet metal intake to use on a motor Iím getting built. It was used with a set of AFR210s, just wanted to know what everyone recommends. Going either 383/396. Not looking to break records, just a fast street car.

  2. #2
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    The bottom pulley on the ATI balancer I used the stock on that came with my Procharge and the change the pulley on the supercharger to increase or decrease boost. There are many factors that determine how many pounds of boost you will make. Such as fuel system police eyes ignition system.

    As far as what heads I would run on a 383 or 396 I would recommend Eliminator set of AFR 227 heads.

    Sent from my Moto Z (2) using Tapatalk

  3. #3
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    Quote Originally Posted by Down View Post
    Just wondering what everyone is using when it comes to pulley size. Right now Iíve got the 6.66 crank and 3.33 SC pulley. Not sure what sizes will do for boost. Iím taking to ASP for a crank pulley to fit over an ATI, theyíre asking what size but Iím not sure what size to get.

    Also, Iíve got a sheet metal intake to use on a motor Iím getting built. It was used with a set of AFR210s, just wanted to know what everyone recommends. Going either 383/396. Not looking to break records, just a fast street car.
    Lloyd Elliott ported trickflow 21 degree heads on a p600b at 11psig makes plenty of power. on that we are using a 7.5"/2.95" pulley setup. I don't know much about an s trim setup.

    find the step up ratio of the supercharger and there are calculators online that can give you a figurative amount of psi you will see. remember a free flowing motor will make less boost than a restrictive motor, but will make more power

    Sent from my SAMSUNG-SM-G935A using Tapatalk
    1994 Z28 T56 - Le2 H/C, SBE, Hooker lt's, some rod ended suspension stuff, and a whole lotta tetanus
    The wrench for LTConvert's 94 Z28- Ellwein 383/LE2 H/C P600B/ CPT Pro Race/Pro Torque 3200

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    Quote Originally Posted by Tubby Z28 View Post
    Lloyd Elliott ported trickflow 21 degree heads on a p600b at 11psig makes plenty of power. on that we are using a 7.5"/2.95" pulley setup. I don't know much about an s trim setup.

    find the step up ratio of the supercharger and there are calculators online that can give you a figurative amount of psi you will see. remember a free flowing motor will make less boost than a restrictive motor, but will make more power

    Sent from my SAMSUNG-SM-G935A using Tapatalk
    How much power are you making?
    Anyone using ASP pullies?

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    Quote Originally Posted by Down View Post
    How much power are you making?
    Anyone using ASP pullies?
    dyno numbers skewed due to tire spin, but numbers were 507whp 660wtq.

    Sent from my SAMSUNG-SM-G935A using Tapatalk
    1994 Z28 T56 - Le2 H/C, SBE, Hooker lt's, some rod ended suspension stuff, and a whole lotta tetanus
    The wrench for LTConvert's 94 Z28- Ellwein 383/LE2 H/C P600B/ CPT Pro Race/Pro Torque 3200

  6. #6
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    Default Vortech S trim and engine questions

    Iím running an S-trim with a 7Ē crank pulley, I donít recall exactly what size SC pulley I had made (low 3ís I think). It was a long time ago when I set it up and did my s-trim research but if you are getting a crank pulley made a 7Ē should be good. Mine makes 7-8 psi through stock heads/comp ratio (only internal mod is a 230/236 cam on a 114).

    Edit: I just found an email from 2008 where I asked ASP if they can make a 3.8Ē SC pulley. Not 100% sure if thatís what I ordered, but I can try to measure it if that would help?
    Last edited by Still2slow; 11-13-2017 at 04:07 AM.
    93 Z28 M6: Bolt-ons, Cam, Vortech S-trim w/Alky 488rwhp

  7. #7
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    It would absolutely help, have any pics of the pullies themselves?

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