Lexus SC300/SC400 front suspension

Discussion in 'Suspension, Steering and Chassis' started by Greg55_99, Jan 3, 2017.

  1. Greg55_99

    Greg55_99 Well-Known Member

    Messages:
    172
    Likes Received:
    39
    Joined:
    Aug 8, 2006
    Local Time:
    3:39 AM
    I thought I'd throw this up there. I found these pics posted some years ago of a gent that took a tape measure to Lexus SC400 front frame rails to gauge how wide the pull out IFS was for use in a 240Z car. It's pretty close to an A-body. Also, the SC400 has the same 5 X 4.5" wheel bolt pattern as Mopars. These are cheap on Craigslist. Also stuff like a-arms can be directly swapped with less expensive Supra items from the same years.



    SC400_frt_susp6.jpg SC400_frt_susp7.jpg SC400_frt_susp8.jpg SC400_frt_susp9.jpg

    SC400_frt_susp5.jpg
     
  2. Greg55_99

    Greg55_99 Well-Known Member

    Messages:
    172
    Likes Received:
    39
    Joined:
    Aug 8, 2006
    Local Time:
    3:39 AM
    If you're pretty handy, it might have possibilities.

    lexus_ifs_1.jpg
     
  3. jos51700

    jos51700 Well-Known Member

    Messages:
    4,355
    Likes Received:
    1115
    Joined:
    May 24, 2009
    Location:
    Bel-Ray
    Local Time:
    2:39 AM
    If you can't be handsome, be handy.

    That said, the bolt pattern on that Lexus is NOT the same as a 4.5 on five. Close enough to screw ya, but not the same (edit: I looked it up, and still have my doubts, but it appears I'm wrong and the op was correct. I'm betting the Lexus is actually 115mm on five, though)
     
  4. dukeboy_318

    dukeboy_318 Our Lives, Our Fortunes and Our Sacred Honor. FABO Gold Member

    Messages:
    28,958
    Likes Received:
    9033
    Joined:
    Jan 19, 2007
    Location:
    la la la la
    Local Time:
    3:39 AM
    might work, my question is though... do the A arms fit the fenders of an A body?
     
  5. kaytbugsdad

    kaytbugsdad Well-Known Member

    Messages:
    210
    Likes Received:
    16
    Joined:
    May 10, 2011
    Location:
    Galt CA
    Local Time:
    12:39 AM
    Lexus is 5 x 114.3mm, which is 4.5 inches.... Not sure about the hub size, though. I think the Lexus is larger than Dodge......
     
  6. 67autocross

    67autocross A new iron curtain drawn across the 49th parallel

    Messages:
    938
    Likes Received:
    362
    Joined:
    Jul 23, 2010
    Location:
    Winnipeg
    Local Time:
    2:39 AM
    I steel the winter wheels off my wife's lexus for pushing my A bodies around the shop...
     
  7. Greg55_99

    Greg55_99 Well-Known Member

    Messages:
    172
    Likes Received:
    39
    Joined:
    Aug 8, 2006
    Local Time:
    3:39 AM
    Last edited: Jan 3, 2017
    • Like Like x 2
    • 72Valiant4Door

      72Valiant4Door Trouble Maker

      Messages:
      986
      Likes Received:
      200
      Joined:
      Sep 20, 2015
      Location:
      Chattanooga
      View My Photos
      Local Time:
      3:39 AM
      My best friend has an sc, and is a Lexus freak.

      the bolt pattern is the exact same, and the hub is smaller than our a-bodies. his car handles like a motherfucker...

      he upgraded to some free mustang wheels recently, fyi.
       
    • Greg55_99

      Greg55_99 Well-Known Member

      Messages:
      172
      Likes Received:
      39
      Joined:
      Aug 8, 2006
      Local Time:
      3:39 AM
      The brakes?

      Huge....

      SC400_frt_susp22.jpg
       
      • Agree Agree x 1
      • Greg55_99

        Greg55_99 Well-Known Member

        Messages:
        172
        Likes Received:
        39
        Joined:
        Aug 8, 2006
        Local Time:
        3:39 AM

        According to the posted pic, with stock offset Lexus wheels, it's 69" outside tire to outside tire. I think that hits the A-body right on the money.
         
      • dukeboy_318

        dukeboy_318 Our Lives, Our Fortunes and Our Sacred Honor. FABO Gold Member

        Messages:
        28,958
        Likes Received:
        9033
        Joined:
        Jan 19, 2007
        Location:
        la la la la
        Local Time:
        3:39 AM
        Front track width on a stock A body is 59.2, center of tire to center of tire.
         
      • RustyRatRod

        RustyRatRod Just another dumbass. FABO Gold Member

        Messages:
        46,925
        Likes Received:
        11610
        Joined:
        Jun 7, 2010
        Location:
        Georgia
        View My Photos
        Local Time:
        3:39 AM
        I love it when people grumble about something as simple as wheel bolt pattern with swaps like this. lol
         
        • Like Like x 3
        • Agree Agree x 3
        • Greg55_99

          Greg55_99 Well-Known Member

          Messages:
          172
          Likes Received:
          39
          Joined:
          Aug 8, 2006
          Local Time:
          3:39 AM
        • dukeboy_318

          dukeboy_318 Our Lives, Our Fortunes and Our Sacred Honor. FABO Gold Member

          Messages:
          28,958
          Likes Received:
          9033
          Joined:
          Jan 19, 2007
          Location:
          la la la la
          Local Time:
          3:39 AM
          sounds like it may just work then. I'm an curious so let us know if you try it. Only other hurdles might possibly be where it places the engine in the bay, but you're gonna be fabbing up motor mounts regardless its mute really. and then it may require a custom oil pan to clear the K and rack. Either way, this looks more realistic than the crown vic swap a guy on here was wanting to try.
           
        • Greg55_99

          Greg55_99 Well-Known Member

          Messages:
          172
          Likes Received:
          39
          Joined:
          Aug 8, 2006
          Local Time:
          3:39 AM
          This info is for the “I wants” guys. Every other day, without fail, gents post a list of “I wants” to this forum.

          I wants rack and pinion steering…

          I wants coilovers…

          I wants to get rid of my torsion bars…

          I wants quick steering…

          I wants bigger brakes…

          I wants tubular a-arms….

          OK, but when the ultimate solution to the “I wants” presents itself in the form of a Hemi Denny, Gerst or RMS suspension setup, the near $5000 price tag makes most of the “I wants” guys go quiet. They know like I know they can never slip that amount of money past their banker (wife). I know I couldn’t. So, I hope the data is taken for what it is, a junkyard alternative. Maybe some gent will look at it, take out a tape measure, have three or four Bud Lights and say to himself… “Y’know… I think I could make that work for not a lot of money…”

          That’s Hot Roddin’….

          Greg
           
          • Like Like x 7
          • Agree Agree x 3
          • Thanks! Thanks! x 1
          • dukeboy_318

            dukeboy_318 Our Lives, Our Fortunes and Our Sacred Honor. FABO Gold Member

            Messages:
            28,958
            Likes Received:
            9033
            Joined:
            Jan 19, 2007
            Location:
            la la la la
            Local Time:
            3:39 AM
            well put. I agree. Granted, I have the Gerst setup and it's very nice and well worth it, but I'm all for DIY hot rodders. I honestly think this has real potential unlike some of the other suggestions out there. Hopefully someone can try it successfully. what do these front clips run ??
             
          • Greg55_99

            Greg55_99 Well-Known Member

            Messages:
            172
            Likes Received:
            39
            Joined:
            Aug 8, 2006
            Local Time:
            3:39 AM
            I don't know what a pull out would run. In my area, it's actually cheaper (I hate to use that word) to buy a parts car someone is trying to get rid of. I've seen a few Craigslist SC300's and SC400's for $1000 and LESS. Then, sell off what's left on Craigslist or to the Lexus guys. Might be able to turn a profit. Your banker would give you a lot less "stank eye" that way.
             
            • Like Like x 1
            • Treblig

              Treblig FABO Gold Member FABO Gold Member

              Messages:
              4,874
              Likes Received:
              1660
              Joined:
              Oct 5, 2013
              Location:
              South Texas
              Local Time:
              2:39 AM
              If that Lexus tire is 7 inches wide then 69 minus 7 equals 62 (C to C), that's pretty close.

              treblig
               
            • dukeboy_318

              dukeboy_318 Our Lives, Our Fortunes and Our Sacred Honor. FABO Gold Member

              Messages:
              28,958
              Likes Received:
              9033
              Joined:
              Jan 19, 2007
              Location:
              la la la la
              Local Time:
              3:39 AM
              dont forget, you have backspacing and such in there.
               
            • Furious65

              Furious65 C-body Guy

              Messages:
              353
              Likes Received:
              39
              Joined:
              Apr 8, 2009
              Location:
              Tucson, AZ
              View My Photos
              Local Time:
              1:39 AM
              I think "that guy" would be me! :D

              The Lexus SC front end, it was brought up briefly in my thread discussing the Crown Vic front. I do think it might be a better choice for an A-body due to less specialized fabrication making it more DIY. There are a couple of drawbacks to the Lexus front. First, it requires high offset (+50mm) rims but that's to be expected with any late model IFS swap. Second, you would still need to modify, probably quite extensively, the inner fenders to work with the positioning of the Lexus coil springs/shock mounts and be sufficiently strengthened to handle the loads being placed on them. The Crown Vic is superior here as it wouldn't need inner fender mods to the extent of the Lexus as the coil spring/shock mounts are self contained. However, anyone with decent welding skills should be able to pull it off. That being said, I would love to see someone make it work!

              I still think the '03-'04 Crown Vic front end would work in an A-body quite well. It would take some custom fabrication (aluminum welding/machining) that the majority of people can't do themselves (read:$), plus it would involve cutting on the inner fenders which most wouldn't want to do, but doable.

              IMO, both setups are capable of working and working well. It's just a question of your skills, your budget, and to what extent your willing to hack on your inner fenders.

              My '68 service manual says 57.4". I know in my '72 service manual it specifies a different track width for 2dr (59.7") vs 4dr (57.4"). Curious if anyone has any clarification on this.
               
            • dukeboy_318

              dukeboy_318 Our Lives, Our Fortunes and Our Sacred Honor. FABO Gold Member

              Messages:
              28,958
              Likes Received:
              9033
              Joined:
              Jan 19, 2007
              Location:
              la la la la
              Local Time:
              3:39 AM
              I have heard that drum brake cars have a narrower track width than disc brake cars. But I've never heard anything involving 2 vs 4 doors. gonna have to look into that one
               
            • Greg55_99

              Greg55_99 Well-Known Member

              Messages:
              172
              Likes Received:
              39
              Joined:
              Aug 8, 2006
              Local Time:
              3:39 AM
              As for the Lexus coilover mounting issue, I think there are already methods to solve that problem:

              [SOLD] - HemiDenny Shock Hoop support bars

              Anyway, it's an idea. Brainstorming 101. Gotta keep the Banker happy!

              Greg
               
            • Greg55_99

              Greg55_99 Well-Known Member

              Messages:
              172
              Likes Received:
              39
              Joined:
              Aug 8, 2006
              Local Time:
              3:39 AM
              Another old pic I saved from the web. I agree the Crown Vic IFS is a good setup, but it's wide. The pic shows the outside tire to outside tire measurement.

              crown_vic_58.jpg
               
            • HemiDenny

              HemiDenny HDK Suspension FABO Gold Member

              Messages:
              7,394
              Likes Received:
              716
              Joined:
              May 31, 2006
              Location:
              NW Ohio
              View My Photos
              Local Time:
              2:39 AM
              I love what you are doing ....Mopar Hot Roddin 101. I have a whole shelf full "what ifs".....mostly from my younger years (before I quit drinking)

              Good luck with your project
              Denny
               
            • Treblig

              Treblig FABO Gold Member FABO Gold Member

              Messages:
              4,874
              Likes Received:
              1660
              Joined:
              Oct 5, 2013
              Location:
              South Texas
              Local Time:
              2:39 AM
              I would quit drinking but since I only drink at two specific events .... I figure I'm OK??



              When I'm by myself
              OR
              When I'm with someone else!!!

              treblig