Thread: Top Swap Info and Faqs, Also lots of 3800 Info

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  1. #41 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    GrandPrix Junkie Sabrewings's Avatar
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    Quote Originally Posted by whyspyder View Post
    Are top swaps only used if you want to supercharge/turbocharge your engine? If one were to swap tops and keep the car NA, would there still need to be reprogramming of the PCM? Hopefully I didn't miss this information in the previous posts....
    Top swapping is only for going supercharged. No reason to swap to the L67 top end otherwise. That's like putting on a condom to jerk off.
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  2. #42 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    SE Level Member whyspyder's Avatar
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    Quote Originally Posted by Sabrewings View Post
    Top swapping is only for going supercharged. No reason to swap to the L67 top end otherwise.
    I will have to re-read and try to understand the different engine codes better. The way I was reading I got the impression I could swap on the slightly better flowing heads (L26 Series III) onto my Series II. Back to reading - may have to make my own table just so can learn this stuff better....
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  3. #43 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    GrandPrix Junkie Sabrewings's Avatar
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    You could. But two things. First, the L26 heads don't really flow any better. Second, it'd be a lot better to just get ported heads.
    2004 Impala LS - got some mods sold!!!
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  4. #44 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    GTX Level Member 02BlueGT's Avatar
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    Quote Originally Posted by whyspyder View Post
    I will have to re-read and try to understand the different engine codes better. The way I was reading I got the impression I could swap on the slightly better flowing heads (L26 Series III) onto my Series II. Back to reading - may have to make my own table just so can learn this stuff better....
    For the time and effort, just get ported heads, the flow difference is minor, and will not make a difference on the Butt dyno, you could do a head swap is what your talking about, when we say top swap we mean the supercharged setup on the na bottom end, or visa versa(for turbo applications) swapping stock NA heads for stock NA heads is a waste of time, gaskets, and effort
    2002 GT...CAI, Headers, Special Eddition two-tone leather interior added, HUD added, 12" Brake Upgrade, ZZP strut tower bars, gmpp sway bars, poly motor mounts, -6an braided SS fuel hoses , Hptuned, Headers, Top Swaped, 50lb inj, E85, 3.4
    I've got Boost!! Top swap Quesions? Click Here
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  5. #45 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    DUI BABY Bio248's Avatar
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    i would love to have a reverse top swapped l67 block with an l26 upper and run a high boost CSC setup. sweeeeet.
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  6. #46 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    Donating Users Quicklynx's Avatar
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    nice writeup...
    2005 IBM Pontiac GTO, Built 4.8L .84 Twin Turbos
    1998 Pontiac Grand Prix Daytona Edition, Sold
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  7. #47 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
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    can a 97 SE with the 3.8 be top swapped????
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  8. #48 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    club of used to own a gp 99prixgt's Avatar
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    Quote Originally Posted by x1lightning View Post
    can a 97 SE with the 3.8 be top swapped????
    yes.
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  9. #49 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    DUI BABY Bio248's Avatar
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    DONT DO A 97!!!! JUST DO A MOTOR/TRANNY SWAP!!

    the vacuum controlled transmission that comes in 97 SE/GT's is straight junk and youll have a hella hard time controlling it with the l67 top end.
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  10. #50 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    GrandPrix Junkie Sabrewings's Avatar
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    This is your L36:


    This is your L36 block:


    This is your top swapped L36 block:


    Any questions?
    Last edited by Sabrewings; 04-25-2009 at 02:18 PM.
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  11. #51 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
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    Quote Originally Posted by Bio248 View Post
    DONT DO A 97!!!! JUST DO A MOTOR/TRANNY SWAP!!

    the vacuum controlled transmission that comes in 97 SE/GT's is straight junk and youll have a hella hard time controlling it with the l67 top end.

    maybe i will just sell this 97 and just buy a slightly newer GTP then, if i have to buy a whole motor and tranny for this car its not really worth it.
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  12. #52 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    DUI BABY Bio248's Avatar
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    not if you find the right deal and a motor/trans. i bet if you look you can find it for less than $1000 from the right place.
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  13. #53 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
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    Thanks for the idea, i will have to do some digging then and see what i can find
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  14. #54 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
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    well i made some calls to the local salvage outfiits today, and i would be looking at over 2k for a motor and tranny, so i think i am back to selling this SE and just buying a GTP...
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  15. #55 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    DUI BABY Bio248's Avatar
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    yeah, you can pick up a non-molested one for like $3k nowadays anyway.
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  16. #56 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    SE Level Member GaBear's Avatar
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    So from what I can Gather. I'd do better to find a Newer GTP motor and tanny for my 97 GT instead of doing a top swap.
    BEAR
    97 Grand Prix GT: 2D/ 3.8 Liter/ AutoMatic / Cool Air Intake/ Full Magna Flow Exhaust
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  17. #57 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    DUI BABY Bio248's Avatar
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    that vacuum controlled transmission is what is your problem. if you didnt have that then you would be money.
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  18. #58 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    SE Level Member GaBear's Avatar
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    Quote Originally Posted by Bio248 View Post
    that vacuum controlled transmission is what is your problem. if you didnt have that then you would be money.
    I'll have to check and see which one I have.
    BEAR
    97 Grand Prix GT: 2D/ 3.8 Liter/ AutoMatic / Cool Air Intake/ Full Magna Flow Exhaust
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  19. #59 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    GrandPrix Junkie Sabrewings's Avatar
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    Quote Originally Posted by GaBear View Post
    I'll have to check and see which one I have.
    If you have a 97 GT you have the 4T60E which is the vacuum controlled transmission.
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  20. #60 Re: Top Swap Info and Faqs, Also lots of 3800 Info 
    SE Level Member GaBear's Avatar
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    Quote Originally Posted by Sabrewings View Post
    If you have a 97 GT you have the 4T60E which is the vacuum controlled transmission.
    So as I said before I'd do better to find a newer GTP model Engine and Trans instead of buying the parts to do a top swap on my GT.....Right???
    BEAR
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