904 Carrera GTS

[DG58INNM]

Thank you Craig. I agree completely

[RennTyp]

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

[JTR70]

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

[356]

Closest photo I found so far.

[RennTyp]

This is the best picture I've found so far. Taken in 1969 so am not sure the bracket is definitely factory spec.



Second attempt!

[RennTyp]

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

[JTR70]

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

[356]

[356]

[356]

[356]

[Porschinelle]

[356]

[S.J.Szabo]

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

[jacques]

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