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Thread: Building an LS1 Powered Widebody Porsche 911

  1. #1
    MrRPJ is offline Rarely Contributes to the Forum Last Online: 29-02-2024 @ 11:47 AM
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    Thumbs up Building an LS1 Powered Widebody Porsche 911

    So for anyone interested Here is my build im starting.

    Youtube Series is here Subscribe!!! https://www.youtube.com/watch?v=1l0u9ATOfq4

    I will be needing a lot of help from the members here as a lot of things on this car will probably have only been done one or twice from info I can find,

    Now before I Start let me start off by saying the car was purchased with no interior, motor or box. The plan was to be a budget build and building what I wanted not what you think it should be. My previous car was a Mercedes E55 the last of the Supercharged V8s. I have always loved the sound and feel of a V8 and on the same note I have always loved the timeless look of the 911 so I shopped around looking for a project as I never had plans of a doing a resto.

    Behold my 76 911 that came with a 993 widebody. So I jumped in the car and drove to sydney and pick up my ride.

    So the plan is to give it a GT2/RSR look but run a turbo LS1. The transaxle is a custom built one for me from a company in Sydney.

    This will be purely home built and on a budget. You are all welcome to offer ideas and help on anything you think me assist. I'm open to keeping this group build I'm just not interested in any of your purist opinions. I was thinking of making Youtube vlogs nothing high quality but more of update evey few days rather than one a week or month. Whats everyones thoughts.










    So lets get started.

    So I have started on fitting my GT2 flares and working on making my roll cage. I picked up a cage from an alfa 105 which is almost the same size. with a few easy mods it should fit quite easily as the main hoop is the same size.

    So first job is to remove the remaining interior and clear away some of the dynamat for the mounting plates for the roll cage. I tell ya this **** was a pain to remove Super sticky and sharp like a torn coke can. But im glad the car had it as the LS1 will be loud!!

    This was the cage I picked up



    and starting to strip interior and dynamat







    now for a quick test fit.



    Ill try weld the 2 "X" braces in this weekend.

  2. #2
    MrRPJ is offline Rarely Contributes to the Forum Last Online: 29-02-2024 @ 11:47 AM
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    Re: Building an LS1 Powered Widebody Porsche 911

    Also my white gagues and wheels have arrived.
    The wheels are 3 piece Monacos 18x9 front and 18x11 rear with 305s Pilot Sports all round the centres will be going gloss black





    Next I spent a few hours playing with my flares i was keen to see how the fit was with my wheels as I was worried about the offset. So it was time to get cutting.

    I know what it feels like to be Nakai now and cut up a 911 lol






    So I drilled some holes and added bolts and done




  3. #3
    MrRPJ is offline Rarely Contributes to the Forum Last Online: 29-02-2024 @ 11:47 AM
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    Re: Building an LS1 Powered Widebody Porsche 911

    Now the fan part. I was not going to waste money with a ****ty 915 so instead went with a custom box for a lot les money and the internals are all brand new. The box is a STI 5 speed with the rear drive unit removed and shortened I went with a the oversize ring and pinion and and double syncros on 1,2,3. Single syncros for the rest. it comes in shorter than a 901 box and will allow my to have the engine a little higher and forward more.



    this is compared to a 901



    now the output for porsche is bottom the ooutput for subaru is top so im goung to run an exposed shifter link sorta like a spyker






    Now the above pics show the fin in a 912 the 911 has a slighty bigger tunnel so the fit should be very easy. Ill mount my shifter higher and and cut down the throw.

    I just picked up my gated shifter for that chink sound lol



    Today ill be making me seat adaptor plaes and finishing off my cage and starting on my strut brace

  4. #4
    MrRPJ is offline Rarely Contributes to the Forum Last Online: 29-02-2024 @ 11:47 AM
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    Re: Building an LS1 Powered Widebody Porsche 911

    More goodies arrived today. My subaru to LS adaptor plate. Custom fly wheel and i finished welding up my cage.



  5. #5
    MrRPJ is offline Rarely Contributes to the Forum Last Online: 29-02-2024 @ 11:47 AM
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    Re: Building an LS1 Powered Widebody Porsche 911

    New transaxle arrived

  6. #6
    MrRPJ is offline Rarely Contributes to the Forum Last Online: 29-02-2024 @ 11:47 AM
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    Re: Building an LS1 Powered Widebody Porsche 911

    Been a slow week. Got the cage finished and the car stripped and all glass out. I have started the long task of sanding!




  7. #7
    jc_sv8's Avatar
    jc_sv8 is offline Fair Contributor to the Forums Last Online: 21-05-2025 @ 07:47 PM
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    Re: Building an LS1 Powered Widebody Porsche 911

    Awesome project, will be watching with interest.

  8. #8
    zorro's Avatar
    zorro is offline Substantial Contributor to the Forum Last Online: 21-05-2025 @ 04:42 PM
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    Re: Building an LS1 Powered Widebody Porsche 911

    This appeals on so many levels.

    Thoughts on scoobydoo box, have you changed any of the glass internals out to cope with turbo lsjuan?
    GM: Has millions of dollars and highly trained engineers.

    Guy in his backyard:
    Has a hole saw.

  9. #9
    MrRPJ is offline Rarely Contributes to the Forum Last Online: 29-02-2024 @ 11:47 AM
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    Re: Building an LS1 Powered Widebody Porsche 911

    well it was that or the old porsche 915 box which is shit even brand new. So my suby box has an oversized ring and pinion that cut in reverse. and brand new gearset, double syncros on 1,2,3 and a torsen LSD, Hopefully it holds up lol

  10. #10
    Micks is offline Permanently Banned Last Online: 19-12-2021 @ 07:11 AM
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    Re: Building an LS1 Powered Widebody Porsche 911

    Have subscribed to this thread, just what this place needs at the moment!! Welcome &

  11. #11
    Tre-Cool's Avatar
    Tre-Cool is offline Substantial Contributor to the Forum Last Online: 08-05-2024 @ 10:50 PM
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    Re: Building an LS1 Powered Widebody Porsche 911

    I did a tuning trip to the Philippines in may & tuned a RWB 993 with an ls3 in it. It still had the stock box in it. It went ****ing quick, pretty light weight sadly the roads/traffic sucked so bad over there.

    http://custompinoyrides.com/2013/11/...la-connection/
    It's happened before, It will all happen again.

  12. #12
    zorro's Avatar
    zorro is offline Substantial Contributor to the Forum Last Online: 21-05-2025 @ 04:42 PM
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    Re: Building an LS1 Powered Widebody Porsche 911

    Quote Originally Posted by MrRPJ View Post
    well it was that or the old porsche 915 box which is shit even brand new. So my suby box has an oversized ring and pinion that cut in reverse. and brand new gearset, double syncros on 1,2,3 and a torsen LSD, Hopefully it holds up lol
    Time will tell

    Be good when this is done, import & non-import running 993 are drug money nowadays. Actually any 911 with some years on it are.

    Did you have the lsjuan laying around to use and get it on the road, did you look at a 6+ litre?
    GM: Has millions of dollars and highly trained engineers.

    Guy in his backyard:
    Has a hole saw.

  13. #13
    blackvussii is offline Forum Contributor Last Online: 05-10-2024 @ 02:27 PM
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    Re: Building an LS1 Powered Widebody Porsche 911

    Great build! I've been following a few of these conversions on ls1tech recently

  14. #14
    MrRPJ is offline Rarely Contributes to the Forum Last Online: 29-02-2024 @ 11:47 AM
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    Re: Building an LS1 Powered Widebody Porsche 911

    Quote Originally Posted by Tre-Cool View Post
    I did a tuning trip to the Philippines in may & tuned a RWB 993 with an ls3 in it. It still had the stock box in it. It went ****ing quick, pretty light weight sadly the roads/traffic sucked so bad over there.

    http://custompinoyrides.com/2013/11/...la-connection/
    Dude believe it or not RWB victoria was the whole reason for my build. I seen a few Pics on the net then found out it was LS and was like im doing that! Minus the 20k body kit. I decided to run the GT2 clubsport widebody. One question they never show the cooling set up what did it run and where?

    Zorro they guy who made my box makes them for a few different applications but it was one of thing for both of us so he knows there is a chance it might let go but we will cross that bridge later i have a feeling drive shafts will let go before the box does. and yeah anything airccoled body and a coupe are all 60k plus nowadays 993 body starts at 100k crazy hey!

    Actually the engine is the only thing I dont have yet lol as they are cheap and easily found. the 6l is a little to pricey for me at the moment. As I sold my AMG just to buy the car and didnt have much left over.

  15. #15
    MrRPJ is offline Rarely Contributes to the Forum Last Online: 29-02-2024 @ 11:47 AM
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    Re: Building an LS1 Powered Widebody Porsche 911

    Tre Cool RWB victoria is the whole reason for my build after seeing pics and videos of it on the net I wanted one so bad. So I sold My AMG and brought the 911. I would like to go 6L but im running out of money fast lol and only budgeted for a 5.7.
    And yeah the price for aircooled porsches now is crazy. anything coupe is 60k+ and a 993 will run your over 100k and 300k for the turbo model!!
    Believe it or not the engine is the only thing i dont have yet. I thought since they were cheap enough I could get one any time as im limited on room for now to store it while the body is in pieces.

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