Cayman GT4: Where are we up to now?

[Motorhead]

I'm always amazed how relatively small geometry changes can make a significant difference to the handling of a car, emphasising the importance of accurate setup. On the non-GT cars I believe that only a sample are taken for geo checking but you'd hope that all GT have a full geo check - wishful thinking perhaps.

Good to hear that you're warming to the GT4 at last D.

Jeff

 

[matthewlatter]

I have done the best mod. Change it for a 991 Turbo S !!

 

[Steve Brookes]

I have done the best mod. Change it for a 991 Turbo S !!

Somehow I think most Cayman owners would disagree.

 

[Nicks]

I have done the best mod. Change it for a 991 Turbo S !!

I'm glad it all worked out well for you.

A picture would be good.

Nick

 

[matthewlatter]

Here you go. Can get the kids in this....

 

[ChrisW]

Steve,

I'll go if you do! Diary clear on that day, keep me posted. Would be nice to see Chris there and the others that are going.

The Cadwell thing, as I recall, was a night-time job, 75 cars and only 3 hours to get your fill so it was very busy. It was also quite cheap which would explain the low-end stuff. Fair enough, no complaints. I vividly remember a Mk1 Nova with a lunatic behind the wheel and a big lump under the bonnet. Stripped out but not a track car - just a shed. Didn't fancy being near him much.

I'm now booked on the Donington day. I think that currently makes 5 x GT4 plus my R. Get yourself booked soon because I believe the Javelin price goes up as the list fills up. Chris has booked the garage so we'll have somewhere for tea and biccies! []

I've just booked as well - it'll give me a chance to check out my brake upgrades. Mind you, the last time I was there I ended up with this -

Ouch .... !!! Better luck this time ....

 

[spyderman]

First outing for my team's brand new Clubsport today - that's Clubsport as opposed to Clubsport. Hope to be racing this at some stage this season.

 

[Nicks]

Can get the kids in this....

Benefit of a GT4

Turbo S does look good.

Nick

 

[ChrisW]

Delicious

Is that a Parr car ?

Not much ground clearance on this car Mr D !

 

[spyderman]

No, not Parr - but they just got theirs too. This is being run by my long-term team Newbridge Motorsport.

The massive profile Hankooks make the arches look even more filled than ever!

 

[Motorhead]

Looks good Chris and should be a bit quicker than the Toyota GT86...!

Hope you get a drive sometime.

Jeff

 

[ChrisW]

The Parr cars will be rentable by the day --- it could be very exciting on a Test Day to find out how the Clubsport goes ... !!

 

[Motorhead]

Rumour has it that the the next GT3 will be a 4.0L.

I'm wondering if the GT4.2 will also feature an engine with this capacity. It would mean the same block could be used for both cars - a cost saving - and power-wise would keep the GT4 ahead of the chasing 718 posse.

Just a thought, of course.

Jeff

 

[Motorhead]

How about this for a GT4 meeting. Pick your colour from these:

[link=http://rennlist.com/forums/gt4/924954-pts-day-at-lime-rock-park-saturday-4-30-a-5.html]http://rennlist.com/forums/gt4/924954-pts-day-at-lime-rock-park-saturday-4-30-a-5.html[/link]

Only in the USA..!

Jeff

 

[gtipirelli]

Passed two GT4's in a Convoy with a 996 GT2 over the weekend on the north Norfolk coast. The GT2 was silver and one of the GT4's was Mexico blue. In fact I saw a lot of Porsches over the weekend along that coast

any of you guys ?

 

[Tonto1]

Well I had my car setup today, bit of a hassle but have a starting point.

What was interesting was my car ride height was way more than oem ie 7mm higher, I scrape already so it was a shock to find my car rides higher than oem by that much !

I decided not to lower it though, as I said I already have scraping issues !

Geo was just about spot on oem bar right rear toe which was out, that would explain my snap to the left under braking VERY hard which was a shock, it was only just out as well but enough to really unsettle the car under very hard brakes, I just though it was my disks and pads bedding in, but that rear toe being out on one wheel explains a lot. (out by 6 minutes)

I have PDSL in my car so there is a shim (2mm) extra in the car on the LCA for that plus a stock 8mm shim, I then also added another 8mm shim so 18mm of shims up front.

this gave me 16mm more front track which is nice and I got the car dialed into -2.3 camber up front with zero toe in. (if you don't have PDSL buy a 2x 10mm spacers to get the same)

The rear was hassle even with my new toe links (buy CUP ones if any one wants to do this these are 40cm longer than GT4 oem ones ! ) there is a small oem shim in the rear LCA but even with my new Toe links we were still having issues, so then had to add another extra 5mm shim to the rear LCA, I did not want to go crazy with rear camber as my inners are wearing faster already on the oem geo, I see many people goto -2.2 at the rear but I am pretty sure with the rear ARB on full still my car is not rolling as much at the rear to want that much camber, so I have taken a punt at -1.8 camber at the rear and will pyro the tyres on my next track day.

I put rear toe up just a tad to 11 minutes each side, this should make the car stable under hard brakes, and of course the new toe links are monoball so again no rear steer coming from rubber bush's now on that part.

No idea how it drives as the trip home was a river, I needed a boat really ! all I can say is that it seems to brake nice and straight and it drives nice and straight, more to come on the driving front

I hated the cars at PEC to a point I was not even looking forward to mine coming :-( , and the snap under braking on my car plus the dire oem understeer, I was not even happy driving mine, I am hoping I can fall in love with the GT4 rather than keep slating it.

even if you dare not change parts which many don't like doing , it's well worth a geo to see if everything is perfect before any track day ! , mine was out so little but still gave me a shock under aggressive braking !

Mr D, do you have a list of the bits you bought and where you got them from and what you ended up with as your final settings?

Cheers

 

[MrDemon]

I have listed all the bits in the thread ! and what I would buy instead of the bits I got.

My settings are also in the thread ! but they are custom to what I asked for (and only a guess on my part) + how I want to drive.

I would goto to the Donnington park track day on the 6thJUne and meet up with every one and you can see what works out in the wild.

 

[Sandy59]

Anyone going to Donington on the 30th June with BAT ?? Was recently moved from the 1st July.

 

[MrDemon]

Cannot always be driving, so took the 2 front wheels off and gave them a very deep clean and finished off with the Gtechniq C5 Wheel Armour coating for future easy cleaning.

people say it last 20k miles !!! lets hope so at the price of the stuff.

 

[ralphmusic]

GT4 PET file here..

[link=http://www114.zippyshare.com/v/PvqVsGaM/file.html]http://www114.zippyshare.com/v/PvqVsGaM/file.html[/link]

Courtesy of neanicu on [link]http://rennlist.com/forums/gt4/908980-gt4-pet.html[/link]