In your post #112 you commented on the 991 manual gearbox which most testers have felt was not normal Porsche standard, the tweet was to link to a possible improvement. The Cayman/Boxster uses a different 6 speed manual box - GT4 race series regs would not allow a 7 speed box.
Yes I am aware of the different boxes but what if porsche use the new and improved 7 speed manual in all road cars but cars built for racing have something else!
Dunno, I am more concerned about them introducing VW's 10-speed auto [
] Any thoughts on the suspension/tyres for a GT4?
I think that the Cayman's 6-speed manual 'box is of Getrag manufacture whereas the PDK transmission is supplied by ZF, so it would be more cost-effective to have a single supplier across the whole Porsche range. Plus, the 7-speed PDK produces better fuel consumption and lower emissions than the manual 'box, so another reason perhaps for choosing it for the road cars. Relatively straightforward to re-engineer a manual PDK for the Cayman I would have thought. The downside is that the auto-PDK is about 25kg heavier than the 6-speed manual 'box but I suppose that the manual-PDK will weigh less than it's auto counterpart since the manual clutch will be lighter than the oil-filled muti-plate item used in the auto. Yes Ralph, I saw that VW are working on a 10-speed auto. I wonder if it's a 5-speed 'box with a a splitter, something like those used in trucks? That would make an interesting manual 'box..! Because of commonality between the 981 and 991 front ends, Porsche could possibly raid the GT3 parts bin for the GT4 front suspension which would allow more camber adjustability, as described in my previous Post #119. Taking that a stage further, I suppose that the whole GT3 suspension, hub and 6-piston brake assembly could be used. Similarly, more adjustability could also be provided in the rear suspension camber by using a two-position strut mount top plate and adjustable-for-length lower transverse links. It's all down to costs. From the pics, it looks as though the car has been lowered significantly and is running on 20" wheels, so there'll definitely be a bespoke spring/damper/ARB set-up. The GT3 runs on 9J/12J 20" wheels whereas the Cayman GTS runs on 8J/9.5J 20" wheels. I suppose that there's sufficient clearance at the front of the Cayman to run on 9J rims but I'm not sure that there's clearance at the rear to allow much wider wheels. JeffORIGINAL: ralphmusicDunno, I am more concerned about them introducing VW's 10-speed auto [
Jeff Another disadvantage of the mid-engined layout on the 981 appears to be engine compartment cooling. Note the additional venting and the electric fans on the 981. How far do you think this limits the development of the 981 using high capacity power units in favour of smaller capacity blown engines? FBR
I run -2 for road and -2.5 for track with adjustable LCA, solid rear toe links and engine mount insert to stop that moving, cars very direct with no extra bad noises. This is on my Spyder btw but I run my R road only at -1.2 at the front. def worth doing on the R if you ever go near a track or are a fast road driver esp the rear toe links and engine mount for road only.
I have a couple of the engine mount inserts for sale [
] They do make a difference and actually make the sound and feel inside the car more "Sporty". However as I've finished the Speed championship for this year they are surplus to requirement now.
I have monoball RSS rear toe links (fully adjustable for toe) to stop rear brake steer and help reduce rear wheel hop the 987 seems to have I also have RSS front LCA to allow camber ajustments more than top mounts, Doing the LCA also gives you wider front track which helps turn in. Also fitted are the RSS locking bolts at the engine side of the toe link. I fitted the boots to help keep the crap out as well.
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