Thread: top swap question

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  1. #1 top swap question 
    GXP Level Member Grimsin's Avatar
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    Ontario Quebec Club Grand Prix • Login
    third post guys says "You would need to add a couple pins to the PCM for the Boost Bypas Valve so that it works''
    Is this something im gonna need to worry about? dont see this in the topswap guide


    3.8l N/A POWA! :4'' HAI\L67 HVTB\HV3\ER Rockers\WP underdrive pulley\Headers\cat delete\91 octane overkill incar tune.3.69 gears, Trans go shift kit.
    My Car:http://www.grandprixforums.net/threa...2005-Impala-LS
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  2. #2 Re: top swap question 
    Florida Tuner Z34Phoenix's Avatar
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    it all depends on what pcm base file you are going to run... there are basically two options. 1) run a GTP pcm base file and change the trans settings for the GT trans, or 2) use the GT base file and adjust fuel spark and other engine settings to run the SC engine.

    If you use the GTP base file then you will need to add the BBV harness pined into the pcm harness. both setups suggest swapping to the 2 bar map from a gtp. but if you use the GT base file then you will not need to add the BBV harness. either way if tuned correctly it is not needed for either setup

    96 Z34 (RIP LQ1 14.81@92.3) L36 Swap 14.9@91.5 www.cardomain.com/id/z34phoenix
    Topswap: P&P All,Si Valves,L76's,LW Pushrods,SD's,DHP PT PB 13.91@99.8
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  3. #3 Re: top swap question 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    I used a Gtp engine file with my factory trans settings and a Gtp map sensor without any issues. The Gtp map sensor was plug n play.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  4. #4 Re: top swap question 
    DUI BABY Bio248's Avatar
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    why not just run it off vacuum and not care about controlling it?
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  5. #5 Re: top swap question 
    Florida Tuner Z34Phoenix's Avatar
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    The 04+ have diff connectors then the older l67 map

    96 Z34 (RIP LQ1 14.81@92.3) L36 Swap 14.9@91.5 www.cardomain.com/id/z34phoenix
    Topswap: P&P All,Si Valves,L76's,LW Pushrods,SD's,DHP PT PB 13.91@99.8
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  6. #6 Re: top swap question 
    GTX Level Member dbextreme's Avatar
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    When I did my top swap I ordered the conversion kit from Intense. It came with the MAP adapter and the BBV sol. harness. John at Intense tuned my PCM, but not sure what he used as a base. I'd say a GT base and adjusted... I do not run the harness for the BBV sol, my mine runs purely off vacuum. No SES and works perfect. Here's a pic I edited to show...

    1999 GPGT - L26, Ported Top Swap, XP Cam, 3.2 MPS, 42.5#, N*, LQ4, SD Headers, Double Roller, TEP Race Trans w/Stand alone Cooler, Precision Industries 3000RPM Stall, 75 Shot Nitrous Express Proton Kit w/Purge, 3" Dual Borla Pro XS, Corsa Dual 3.5 Tips, 5% Tint
    1995 Firebird Formula - Under the Knife
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  7. #7 Re: top swap question 
    Moderator dsmuts's Avatar
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    sniff sniff holding back tears that's from my old gtp
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  8. #8 Re: top swap question 
    GTX Level Member dbextreme's Avatar
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    now your old GTP legacy's lives on helping others like Grimsin and myself!!!!

    I still got that box to... LMAO
    1999 GPGT - L26, Ported Top Swap, XP Cam, 3.2 MPS, 42.5#, N*, LQ4, SD Headers, Double Roller, TEP Race Trans w/Stand alone Cooler, Precision Industries 3000RPM Stall, 75 Shot Nitrous Express Proton Kit w/Purge, 3" Dual Borla Pro XS, Corsa Dual 3.5 Tips, 5% Tint
    1995 Firebird Formula - Under the Knife
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