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904 Carrera GTS

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  • #31
    Thank you Craig. I agree completely

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    • #32
      Hi, does anyone have a detailed picture of the bracket used to secure the 1965 spec 904 megaphone exhausts to the gearbox? I have scoured the internet and can't find one! Any help gratefully received!

      Thanks, Philip

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      • #33
        Hello Philip and Welcome! I know I have seen a photo of exactly what you're after. I'll look and see if I can find it. Justin
        Justin Rio

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        • #34
          Closest photo I found so far.
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          • #35
            This is the best picture I've found so far. Taken in 1969 so am not sure the bracket is definitely factory spec.

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            Second attempt!

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            • #36
              Anyone have any opinion as to whether this ^^^^ is a factory exhaust bracket or not?

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              • #37
                Hey Philip,

                Glad we got the photo problem dialed in. Great shot BTW!

                That bracket looks factory to me being that its a pressed piece. The rolled strengthening beads is another detail that gives that away. Most privateers during this era would not have gone through the trouble of making this intricate of a bracket. More than likely it would have been a flat base-plate with a tubular arm out to each stinger. This bracket puts me in mind of an early 356 pre-A windshield wiper motor "bat-wing" bracket. I'd say its original.
                Justin
                Justin Rio

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                • #38
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                  • #39
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                    • #40
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                      • #41
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                        • #42
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                          • #43
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                            • #44
                              Education wanted:

                              What gearbox was used/adapted for IRS?

                              Was this box based on the RSK box?

                              Was it/were both based on the 714?

                              Was the "ramp&beans" LSD still used in the 904? RSK?

                              Thanks
                              ----------
                              Keep 'em flying...

                              S.J.Szabo

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                              • #45
                                Hi
                                the first IRS box was the 690 it was a 5 spd based on the 519 vw case. it used the jelly bean dff and the the fulcrum plates were pined to short axles the the inner part looked like a swing axle and the outer part was splined like a driveshaft. this box was the 550A box. the 718 for the RSK/RS60/RS61 etc. had a Mag case that was similar to the 644 case. The jelly bean diff ran on bigger brgs that allowed axial movement in the diff and the outer part was a conventional u joint. By Porsche design nos the next evolution was the 822 this box uses 901 gear sets there may have been 6 speeds but i have never seen any. the shift shaft attached at the bell housing and it used a clutch plate diff and Nadella axles. basically the 822 for the 8 cylinder engines and the 904/906/901/914 are based on the same internals.
                                j

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