Boxster & Cayman suspensions - same?

[Bob Z.]

Does anyone know if the suspension on the Boxster (987) and Cayman is the same?

I have a set of H&R springs (part# 29168-1) for the 987 Boxster S I have and someone with a Cayman might be interested in buying them; however, H&R has different part#s. But I thought the suspensions were the same. By the way, H&R could not give us a definitive answer.

[RFM]

Only the front springs have the same characteristics.

987 S front without PASM 27N/mm stabiliser bar: 24,0 x 3,8mm

rear without PASM 33N/mm stabiliser bar: 19,6 x 2,6mm

987 C S front without PASM 27N/mm stabiliser bar: 24,5 x 3,8mm

rear without PASM 40N/mm stabiliser bar: 19,0 x 2,7mm

Hope it help.

[jayray]

Only the front springs have the same characteristics.

987 S front without PASM 27N/mm stabiliser bar: 24,0 x 3,8mm

rear without PASM 33N/mm stabiliser bar: 19,6 x 2,6mm

987 C S front without PASM 27N/mm stabiliser bar: 24,5 x 3,8mm

rear without PASM 40N/mm stabiliser bar: 19,0 x 2,7mm

Hope it help.

RFM,

would you know the specs for the Boxster with PASM. I can't seem to find this anywhere.

thanks,

John

[RFM]

987 PASM

Front 33 N/mm Stabiliser bar: 24.0 x 3.8 mm

Rear 40 N/mm Stabiliser bar: 18.5 x 2.5 mm

987S PASM

Front 33 N/mm Stabiliser bar: 24.5 x 3.8 mm

Rear 40 N/mm Stabiliser bar: 18.5 x 2.5 mm

Regards.

[jayray]

987 PASM

Front 33 N/mm Stabiliser bar: 24.0 x 3.8 mm

Rear 40 N/mm Stabiliser bar: 18.5 x 2.5 mm

987S PASM

Front 33 N/mm Stabiliser bar: 24.5 x 3.8 mm

Rear 40 N/mm Stabiliser bar: 18.5 x 2.5 mm

Regards.

RFM,

Thanks for the quick response.

John

[renzop]

Since RFM is from Belguim I wonder if the numbers he is quoting are Euro specs or US. I don't know if they are different... Anyone???

Regards,

Alan

[jayray]

Since RFM is from Belguim I wonder if the numbers he is quoting are Euro specs or US. I don't know if they are different... Anyone???

Regards,

Alan

I have checked these numbers with ones I saw in a book by Paul Frere on the Boxster. Here is what he stated as the numbers for the 2005 model.

Boxter

spring rate (N/mm) Front 27 Rear 30

Anti roll bar Front 23.6 x 3.4 Rear 19.0 x 2.5

Boxter S

spring rate (N/mm) Front 27 Rear 33

Anti roll bar Front 24 x 3.8 Rear 19.6 x 2.6

Boxter S PASM

spring rate (N/mm) Front 33 Rear 40

Anti roll bar Front 24.5 x 3.8 Rear 19.6 x 2.6

It seems RFMs numbers were close but look off when looking at the rear stabalizer bar. Why would it be less than the 05 models? When looking at the Parts manual for the MY07, the front of the Boxster PASM and the Boxster S PASM have the same part number but the rears are diff. probably due the extra weight in the S model. Bottom line, the PASM on the Boxster improves the suspension a fair bit and for that I am happy. Any confirmation of exact specs would be appreciated.

John

Edited February 9, 2008 by jayray