Cayman R Paul Posted November 2, 2018 Share Posted November 2, 2018 14 hours ago, Dougle_turbo said: Sam, I have 4 x second hand OEM 5mm wheel spacers that I picked up a while ago. Looks like its only the front that are required for a Geo setup. If you wanna buy 2 off me send me a PM. Not looking for much. If Sam doesn't want these, may I have 2nd shout on them? 1 Link to comment Share on other sites More sharing options...
Popular Post Peopleandcars Posted November 2, 2018 Popular Post Share Posted November 2, 2018 @Dougle_turbo so for reference the track width of 987 (S) is F 58.5" // 1.486m R 60.2" // 1.529m There are other ways to dial out understeer with no changes to the track width balance, rubber first then suspension/alignment 2 Link to comment Share on other sites More sharing options...
Popular Post Sam@IoM Posted November 5, 2018 Author Popular Post Share Posted November 5, 2018 The increase in front track increases the leaver arm acting on the front antiroll bar reducing its effective rate. A similar change would be to put a smaller front ARB on the car. 2 Link to comment Share on other sites More sharing options...
CaymanCup_Chris Posted November 5, 2018 Share Posted November 5, 2018 1 hour ago, Sam@IoM said: The increase in front track increases the leaver arm acting on the front antiroll bar reducing its effective rate. A similar change would be to put a smaller front ARB on the car. Better wet weather handling too Link to comment Share on other sites More sharing options...
MJ Posted November 7, 2018 Share Posted November 7, 2018 do the 5mm spacers only improve front track for S models? or a benefit to be had for an R too? Would the longer bolts be required or can you get enough bite on the standard bolts? I was able to use 7mm spacers on my 911 with the stock bolts, hence the question. Cant say I've noticed much understeer in the CR to be fair, even when really pushing it. How did the OP get on at CoG ? Link to comment Share on other sites More sharing options...
Founder Beanoir™ Posted November 7, 2018 Founder Share Posted November 7, 2018 8 minutes ago, MJ said: do the 5mm spacers only improve front track for S models? or a benefit to be had for an R too? Would the longer bolts be required or can you get enough bite on the standard bolts? I was able to use 7mm spacers on my 911 with the stock bolts, hence the question. Cant say I've noticed much understeer in the CR to be fair, even when really pushing it. How did the OP get on at CoG ? I found more benefit on my R with the 7mm spacers. I bought longer bolts (in black) from the OPC, I didn’t want to risk it. Link to comment Share on other sites More sharing options...
Dougle_turbo Posted November 7, 2018 Share Posted November 7, 2018 On 02/11/2018 at 08:50, Cayman R Paul said: If Sam doesn't want these, may I have 2nd shout on them? Sam's taken them I'm afraid. Link to comment Share on other sites More sharing options...
Popular Post briggy Posted November 7, 2018 Popular Post Share Posted November 7, 2018 I used CoG on my 944. It was on the original suspension, which seemed fine to me, but the shocks were leaking, so I changed them for Bilstein B6. Again, they were fine. I then went to CoG and told Chris I wanted a fast road setup. It completely transformed the car. The handling became neutral, such that on the limit, you could steer it with the throttle, rather than initial understeer. I also told them that I never wanted to be in a situation where the car would "let go", as in suddenly oversteer, once the limit had been exceeded. The turn in was much sharper too. I went for the full setup with corner weighting. He test drove beforehand, giving a running commentary of his observations. He then explained what he would do and what the effects would be e.g. -ve camber on the rear wheels would mean more contact in the corners (so better grip) at the expense of some additional inner tyre wear, which wasn't a problem as the previous tyres were changed due to age, not wear. He showed me what he was doing and even told me how to fix a few niggles that had always bugged me. Once complete, we went along the same roads and he gave a running commentary of the differences. This included the same roundabout, at the same speed, followed by more speed than I thought possible. Then I drove it, on his instruction (which was a lesson in itself). Forget spending money on more power unless you've sorted the geo. I can't recommend CoG highly enough. Cheers, Bryan 3 Link to comment Share on other sites More sharing options...
Sam@IoM Posted November 7, 2018 Author Share Posted November 7, 2018 6 hours ago, MJ said: do the 5mm spacers only improve front track for S models? or a benefit to be had for an R too? Would the longer bolts be required or can you get enough bite on the standard bolts? I was able to use 7mm spacers on my 911 with the stock bolts, hence the question. Cant say I've noticed much understeer in the CR to be fair, even when really pushing it. How did the OP get on at CoG ? I'm heading there on the 19th - I'll report back. Link to comment Share on other sites More sharing options...
Cayman R Paul Posted November 8, 2018 Share Posted November 8, 2018 14 hours ago, Dougle_turbo said: Sam's taken them I'm afraid. Cheers for keeping me posted ? Link to comment Share on other sites More sharing options...
Sam@IoM Posted November 19, 2018 Author Share Posted November 19, 2018 As promised, I'm back from CoG and I would highly recommend their services. I'm a Chassis/Vehicle Dynamics Engineer by trade and found it very reassuring just how much care and detail Chris took to understand the base car before doing a visual inspection of the entire car. He then adjusted the settings to what we discussed and I'm delighted with the outcome. No doubt I'll be back next year to have some adjustable LCAs fitted and a more focused setup when the Cup2s go on. Link to comment Share on other sites More sharing options...
Dougle_turbo Posted November 19, 2018 Share Posted November 19, 2018 24 minutes ago, Sam@IoM said: As promised, I'm back from CoG and I would highly recommend their services. I'm a Chassis/Vehicle Dynamics Engineer by trade and found it very reassuring just how much care and detail Chris took to understand the base car before doing a visual inspection of the entire car. He then adjusted the settings to what we discussed and I'm delighted with the outcome. No doubt I'll be back next year to have some adjustable LCAs fitted and a more focused setup when the Cup2s go on. Can you upload your print out? Did they have any trouble adjusting any of the arms due to bolts seizing? Link to comment Share on other sites More sharing options...
Sam@IoM Posted November 19, 2018 Author Share Posted November 19, 2018 2 hours ago, Dougle_turbo said: Can you upload your print out? Did they have any trouble adjusting any of the arms due to bolts seizing? No trouble with the bolts, although my car has only done 15,000 miles and had no witness marks on any of the adjusters. I can’t upload a picture as it’s over 0.98MB. I’ll see if I can reduce the size..... Link to comment Share on other sites More sharing options...
Sam@IoM Posted November 20, 2018 Author Share Posted November 20, 2018 Excuse the crappy picture. Link to comment Share on other sites More sharing options...
Dougle_turbo Posted July 23, 2019 Share Posted July 23, 2019 Hi Sam, Just wondered how you were getting on with the geo setup on the car? On 20/11/2018 at 20:51, Sam@IoM said: Excuse the crappy picture. Link to comment Share on other sites More sharing options...
Sam@IoM Posted July 29, 2019 Author Share Posted July 29, 2019 @Dougle_turbo Hi, I'm getting on well with it. I did a trackday at Donington Park recently and the car felt superb, very stable on the brakes with lots of turn-in especially when trail braking. Tyre wear on the Cup2s was very good. On the road it is very planted and feels nicely linear in its response. Overall the car could do with more camber both front and rear but I can't achieve it without GT3 LCAs and I suspect it will compromise the on road performance. I'm hoping to get some longer wheel bolts for my spacers and GIRO discs on next week ready for the 'ring and Spa in Sept. How are you finding yours? Link to comment Share on other sites More sharing options...
Dougle_turbo Posted July 31, 2019 Share Posted July 31, 2019 Mines been great, but I need to sort the geo out. I've destroyed a front left on track, something I knew would happen but just hadn't got round to making the required suspension changes. I've now fitted Elephant Racing LCAs to the front (I also have a pair for the rear but may not fit them) along with adjustable castor arms, I'll dial in 2.5 neg upfront and 2 neg at the rear and see how that goes. Chatted to CoG today and will get a full setup from them in September, for now I'll try the numbers above. Link to comment Share on other sites More sharing options...
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