KC valvebody for cammed, and ported head TR

Discussion in 'Transmission Talk' started by bison, Sep 14, 2008.

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  1. bison Moderator

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    Installed a KC code vb in my car tonight that Chris at CK gave me for feedback. WOT 1-2 shift is at roughly 6000 rpm. 2-3 is at 5800. This is a killer set up for a 130mph TR. The vb mods are as follows and are for a dual fed direct setup:

    accumulator valve spring replaced with CK's
    line bias replaced with CK's
    3-2 control valve locked out so it cant stroke
    stock BR governor
    CK seperator plate
    MTV up spring removed
    .500 boost valve

    If you wanted to lower the shift points at WOT you could simply replace the light BR code secondary weight with a medium weight from a KZ code vb. This will knock it back a few hundred rpm at WOT. Others used the medium secondary weight but im not sure which codes. Anyone else with this info can chime in. KZ is an Olds 442. Chris reported that the KT code is a very similar calibration and had the same shift points. I may clip a coil or two off the 1-2 shift valve spring to get the 1-2 shift down to 5700-5800. I have a 212-212 cam and a decent set of ported iron heads. I also run a very efficient 9.5" PTC converter that slips in the low 4% high 3% range at 5800 rpm. If your converter is less efficient you may need to run the medium governor weight to avoid over revving. Keep in mind if the converter is more efficient then the driveshaft speed will be higher for a given engine rpm. This means that the governor pressure will be higher and it will shift earlier. With a higher converter slip % the governor pressure will be lower and it will shift at an even higher engine rpm. If in doubt use the medium secondary weight and remove weight from it as needed till you achieve the ideal shift point. You may want to clip a coil off the 1-2 shift valve spring to lower that 1-2 shift rpm a little.

    Chris, thanks for the opportunity with this vb.
    bison, Sep 14, 2008
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  2. chris718 Supporting Vendor

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    Brian thanks for the feedback.Its great to see we both got the same results.I am putting together the supplement I promised everyone and think this along with the other info this combo gathered will be valuable to everyone here.We all know how difficult it has been to mod a brf to do that with the other problems it brings in(Unless you have a converter that has poor hydraulic coupling) .Now we all have a combination that can be built for high rpm that works with the 3.42 and throttle body configuration unique to the GN.
    chris718, Sep 16, 2008
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  3. SNOWBIRD New Member

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    What would be the shift points be on the street at light throttle???
    SNOWBIRD, Sep 16, 2008
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  4. bison Moderator

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    I dont have exact speeds but they are close to the BR vb but it goes into fourth at a lower road speed than a BR.
    bison, Sep 17, 2008
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  5. 77 cruiser Active Member

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    What the KC from?
    77 cruiser, Sep 17, 2008
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  6. WE287GN New Member

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    If we are refering to the same, my KCF came out of my old 86 Regal Limited V8 307.
    WE287GN, Sep 17, 2008
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  7. jakeshoe Member

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    I have a couple of KC valve body cores.

    I also have CRF.
    jakeshoe, Sep 17, 2008
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  8. BEATAV8 The Engine Whisperer

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    Where does the RPM come from with this setup? I thought a stock BR gov would shift at 5200 or so and that's about it.

    thanks
    BEATAV8, Sep 26, 2008
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  9. J-B Racing Releasing The Pressure

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    This would not be in your case. Driving your car felt like I was in a Taxi cab..
    J-B Racing, Sep 26, 2008
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  10. bison Moderator

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    The shift valve calibration is different. The governor/vb combo together determines the shift point. Not just the governor.
    bison, Sep 26, 2008
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  11. jakeshoe Member

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    I've got a KC VB and a Monte SS gov combo for $100 :D
    jakeshoe, Sep 26, 2008
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  12. bison Moderator

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    Are you gloating or are they for sale? Ill take them
    bison, Sep 27, 2008
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  13. jakeshoe Member

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    Not gloating at all,
    I'd sell my wife if the offer was right.
    And maybe gloat on the way to the bank. :D

    I'll box it up. Shipping is free for you.

    email me at jakeshoe@yahoo.com
    jakeshoe, Sep 27, 2008
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  14. bison Moderator

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    email sent
    bison, Sep 27, 2008
    #14

  15. chris718 Supporting Vendor

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    biton do you have data log for vbody?i have the 2 drums w ith bearings for you on monday.i have 7 updates for the supplement and want you to do the one on the vbody.ive got the aa data with very good results.also want you to do the gvrner info with pino.
    chris718, Sep 27, 2008
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  16. bison Moderator

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    Ill get a couple clean data logs. Unfortunately on the 10.29 pass i didnt get any data till i was about 7 seconds into the run. Ill get some more asap. Governor info is no problem.
    bison, Sep 27, 2008
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  17. chris718 Supporting Vendor

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    why ,you got nervous? just kidding:eek:
    chris718, Sep 27, 2008
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  18. bison Moderator

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    no the datalogger cut out for about 5 seconds. Im an adrenaline junkie. Wouldnt matter how nervous i always go for it.
    bison, Sep 27, 2008
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  19. BEATAV8 The Engine Whisperer

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    I hope to be installing one of these this weekend. Modified KC valve bodie from CKperf.
    BEATAV8, Oct 2, 2008
    #19

  20. LSJM1 Member

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    This is good to hear I have a whole KC trans that I want to build.It came from an 86 caddy
    LSJM1, Oct 2, 2008
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