RMS on Porsches - why some and not others

[Adam B]

my understanding is both Boxsters and std C2/C4 996 suffer from this problem (and have heard 987/997 are nto much better) but TT and GT cars don't.

Currently loking for a 9964S or 996tt so am assuming the former may suffer, tha latter won't.

Is my understanding correct and if so what is different about the turbo/GT motors that prevents this problem?

thanks

[clubsport]

they use different blocks,,, a different casting which apparently can lead to occasional RMS problem.

A RMS problem is not that expensive to sort out, either covered under warranty or is certainly priced into secondhand private sales.

[Adam B]

thanks

well OPC quoted £800 for RMS (I guess £600 from an indie) so could do witout it to be honest

so am I right in that only the turbo and GT2/GT3 don't suffer from this?

[DaGinge]

The turbo, GT2 and GT3 have engines derived from the LeMans winning GT1 and are incredible pieces of machinery - old school porsche reliability and an entirely different design from the boxster/C2/C4/C4S (986,987,996 and 997) which share the same basic design and the same RMS weakness.

Certainly on the GT3 there are absolutely no common engine problems, and a good reason why its residuals will be solid going forward - modern porsche performance and handling with old fasioned reliability.