924Board.org

[pocketscience]

Hi,

As part of my 5-lug conversion I'm installing the 951 Alu trailing arms, as you see below. What I'm after is a part number for the bush shown in red - it's not mentioned in PET, and is a different part to the existing one I have from the looks of it.




Thanks,
_________________
Whoever said you can't buy happiness forgot about Porsche!
81 924 N/A, GTS lights, Saratoga, interior, headers, Integral cam, EFI (sold)
95 993
69 911

[gohim]

86 951 trailing arms differ from all other year 951s.

Stands to reason that the bushings may be different as well.

Do you know what model year car the trailing arms you have came from?

[pocketscience]

I think there's a paper tag on the units at home. Will check. They are the late offset ones - but not sure if that's 86 or 87.

According to PET there are 2 parts numbers, but as the bushing I highlighted is not numbered there's no way to tell if it differed between years...


Cheers,
_________________
Whoever said you can't buy happiness forgot about Porsche!
81 924 N/A, GTS lights, Saratoga, interior, headers, Integral cam, EFI (sold)
95 993
69 911

[ideola]

Late offset trailing arms are late offset trailing arms, there's no difference between NA and 951 versions. Gavin, from what I recall, your trailing arms are not from an 86 951, I seem to remember them being from a 87 or 88 944. I don't believe there's any difference at all between the bushings for any of the alu trailing arms, but I admittedly haven't had every iteration in front of me for a side-by-side comparison.

There are no OEM replacements available for those bushings. The only options I am aware of are Weltmeister Delrin ($160 per pair), Monoballs available from Racer's Edge, Elephant or Tarret ($300-$320 per pair), or possibly Prothane Polyurethane. I have not tested the latter for correct fitment.
_________________
erstwhile owner of just about every 924 variant ever made

[ic932]

They are dimentionally all the same regardless of model year. A harder compound was used at some point on M030 equipped cars...that would account for the 2 different part numbers.

[pocketscience]

Thanks Dan - you were of course, correct!

The tag says "1987 944S", and the stamped part numbers are:

951 331 514 06
951 331 513 06

Interestingly there is also a "86" stamped beside the part number... hmm.

Powerflex in the UK list a "REAR TRAILING ARM INNER BUSH" for 944/968

Flo-Flex also list a "Rear Axle Trailing Arm Inner Bush" which looks like:



But that looks different to what I have here - which has a metal outer covering - but maybe that's not important...?


G.
_________________
Whoever said you can't buy happiness forgot about Porsche!
81 924 N/A, GTS lights, Saratoga, interior, headers, Integral cam, EFI (sold)
95 993
69 911

[ideola]

Gavin, those look correct to me...compare to my photos of the Delrin bits I purchased not too long ago (the white ones with metal sleeves in the upper left corner):


Regarding the metal outer covering, after you press out the old rubber bushing, you then have to remove the metal sleeve as well, which is a PITA the first time you do it. Here is the process I ended up using, as recommended to me by tjbreen over on Rennlist:

[pocketscience]

Awesome - thanks again!
_________________
Whoever said you can't buy happiness forgot about Porsche!
81 924 N/A, GTS lights, Saratoga, interior, headers, Integral cam, EFI (sold)
95 993
69 911

[pocketscience]

A few other bush removing tips: http://www.powerflex.co.uk/fitting_guides.php

Dan, the 4 black bushes in your pic at the back - are they for the spring plate doo-hickey?

Cheers,
_________________
Whoever said you can't buy happiness forgot about Porsche!
81 924 N/A, GTS lights, Saratoga, interior, headers, Integral cam, EFI (sold)
95 993
69 911