Cayman GT4: Where are we up 2 now? Déjà vu Edition

[Motorhead]

Those are decent power and torque hikes Ralph. DeMan use a stroked version of the 3.8L with a larger throttle body, modified exhaust manifolds and custom tuning to achieve that. I'm not sure that we can expect such figures for the 982 GT4, though - as you say - the meatier torque band will help mitigate perceived gearing issues.

BTW my friend and I have been analysing the latest GT4 and Spyder videos that are around and are convinced - if indeed any of us needed convincing - that we're listening to 6-cylinder n/a engine. Also we've been trying to ascertain the the change-up point on the Clubsport racer, but it's a bit inconclusive owing to the doppler effect lowering the frequencies. I would guess that the new car will have a very similar rev limit to its predecessor, as noted in the DeMan plots.

Jeff

 

[Twinfan]

So we're going to be getting a ".2" upgrade, basically. A 4.0ltr version of the 3.8ltr with new particle filters and exhaust volume limits, probably with 405bhp which is the extrapolated figure from the 3.8ltr and 10bhp less than the current 911 Carrera S - the same as last time.

If true, I'm certainly not going to be badgering my OPC for one. It doesn't sound very exciting for the ~£30k it would cost me to change from my 981 CGTS.

 

[ralphmusic]

The change points suggest driving out of corners on torque (which is why the sound is deeper) and revs for hp on the straights. The drivers are pushing on, using the engine and gearing to get the fastest speed. Still, having race car derived characteristics doesn't help it's attraction to road drivers.

 

[Twinfan]

As I said on PH - kind of like an NA turbo-style engine then....

 

[ralphmusic]

So we're going to be getting a ".2" upgrade, basically. A 4.0ltr version of the 3.8ltr with new particle filters and exhaust volume limits, probably with 405bhp which is the extrapolated figure from the 3.8ltr and 10bhp less than the current 911 Carrera S - the same as last time.

If true, I'm certainly not going to be badgering my OPC for one. It doesn't sound very exciting for the ~£30k it would cost me to change from my 981 CGTS.

Even the god-like GT3 variants will have particle filters and be subject to exhaust noise limits.

Numbers are important to how it drives.

 

[ralphmusic]

Those are decent power and torque hikes Ralph. DeMan use a stroked version of the 3.8L with a larger throttle body, modified exhaust manifolds and custom tuning to achieve that. I'm not sure that we can expect such figures for the 982 GT4, though - as you say - the meatier torque band will help mitigate perceived gearing issues.

BTW my friend and I have been analysing the latest GT4 and Spyder videos that are around and are convinced - if indeed any of us needed convincing - that we're listening to 6-cylinder n/a engine. Also we've been trying to ascertain the the change-up point on the Clubsport racer, but it's a bit inconclusive owing to the doppler effect lowering the frequencies. I would guess that the new car will have a very similar rev limit to its predecessor, as noted in the DeMan plots.

Jeff

One of my "what might I do next" scenarios was to put a Powerkit on mine, which would improve mid-range torque but probably not do a great deal for top-end power as mine spins up faster than the stock GT4, and add a 4.0L kit to really crank up torque. The costs for both were getting rather unreal however a Powerkit on its own is a good and not that expensive way to upgrade an otherwise stock GT4 for those that don't like a 4.0L engine.

 

[Brian_Innes]

All this speculation on the engine for the 982 GT4 is very interesting..........

I agree with Mr D, I'm not ruling out Porsche throwing-in a flat-4 2.8t Cayman R into the mix. After all, the 911R sold very well, despite the 991.2 already having a GTS version. Profit-wise, Porsche would win, win.

To my thinking, the new 982 GT4 should be a 4.0 n/a screamer revving to around 9000rpm, with PDK option, and fully adjustable suspension and aero, if it is to be a meaningful upgrade to the 981 GT4.

Should this happen, then the way could be clear for a flat-4 Cayman R, both manual and PDK. Now, that would get my attention........

Brian

 

[Twinfan]

Not going to happen - no way they're developing an F4T engine for one model. Especially if they're considering dropping the Cayster range altogether as some rumours state.

 

[Brian_Innes]

Looking on the bright side of life........

Unlike you David, I am an optimist, and I don't have emphatic, entrenched opinions on Porsche engines.

Meantime I'll continue to keep an open mind on the subject, and wait and see what evolves.

I enjoy taking part in the speculation, even though it's completely futile, as Porsche will make the decision public in the fullness of time.

Brian

 

[Twinfan]

Unlike you David, I am an optimist, and I don't have emphatic, entrenched opinions on Porsche engines.

Ooh, harsh! [8D]

I'm speaking logically, given that the Cayster has to be cheap and my view is based on likelihood given the costs involved and previous models across the sportscar range.

 

[Motorhead]

So we're going to be getting a ".2" upgrade, basically. A 4.0ltr version of the 3.8ltr with new particle filters and exhaust volume limits, probably with 405bhp which is the extrapolated figure from the 3.8ltr and 10bhp less than the current 911 Carrera S - the same as last time.

For what it's worth David, on past performance from Porsche I think that's pretty much what we're going to get. Maybe this time there'll be more scope for adjustment in the rear suspension though (a bit late for D of course, but you know what I mean..!).

I'm speaking logically, given that the Cayster has to be cheap and my view is based on likelihood given the costs involved and previous models across the sportscar range.

I reckon that introducing yet another higher powered Cayman derivative is highly unlikely at the moment.

Jeff

 

[Twinfan]

A Rennlist poster who was at Weissach yesterday posted the following. I've added some interpretation to his comments, you have to read between the lines:

My phone was away from me for like 6 hours, but that's pretty much the rumoured car. [Flat six engine] The other half of the twin will the same but the the cloth top like old ones. [Spyder and GT4 identical, bar the 981 Spyder roof] Engine will be bespoke to the car(s) for a while. The race car version which I am most interested is going to be a evolution but will be competitive with competition from the cheater cars from McLaren and AMG. Without the extra weight of useless stuff for the class like snails. [New 4.0ltr engine in the GT4/Spyder will be used in other cars in the future. No turbos in the GT4 race cars either] The thing that was suppose to be on top of them is bonkers. I will totally take it over a GT3 without even thinking. But it is neither confirmed nor denied. The car I saw was just a figment of my imagination apparently. [GT4RS mule] Cars will also follow the current transmission rules. Cars also don't need someone to press the brakes for torquing. [Manual and PDK options for the GT4, PDK only for the RS if they produce it. No centre-lock wheels] There was something sitting there without a hard top, but it was completely ignored as the car next to it is the Youtube car, I already placed an order directly with Weissach, it is the ultimate widow maker, good luck to my wife. I suggested a mandatory training session with purchase. They also think its' a good idea just so their customers won't be dying left and right. [911 Speedster, the "GT3 convertible"] The same guy also posted elsewhere: As for the title of this tread (Re: Porsche Cayman GT4 RS), I saw the car, it isn't confirmed or denied. All based on market acceptance. But I can say it is a bad assed car, pretty much the very best out of Weissach for a since a long while, and that already included the GT2 RS. It's not about the ultimate fastest lap time, but more about the car itself.

So the persistent rumours are the ones that appear to be true:

* Spyder and GT4 are coming

* They're identical bar the roof

* 4.0ltr flat six NA engine

* A GT4RS mule exists

Remaining questions:

* BHP? Somewhere around 410bhp would be about right.

* Will the GT4 RS make production? As has been the case for a while, it seems even Porsche don't know that yet!

 

[ralphmusic]

^^^

Somewhat delphic but it simply confirms the 4.0L

IMO

Questionable re Spyder having GT4 suspension and brakes

Bespoke engine - well a 4.0L non-GT3 is 'bespoke' but not sure about wide use in other cars

Current transmission rules - either a la 991.2 GT3 'rules' or Gen 1 GT4 'rules' - does sound more like choice though

Brakes for torquing - see that's added from PH

Widow maker - must be either GT3 Speedster or GT2RS Speedster (just joshing..)

I still think RS is the Clubsport race car, but time will tell. We had Matt posting a few years ago after chatting with Mr P about the PDK RS and it turned out to be the race car so I guess my thinking is constrained by that scenario.

Power possibly as you suggest but biggest difference will be in the torque curve. No reason to believe it will run any lower rev than current 3.8L and for a track oriented (not focused) car that will be an improvement.

Oddly, nothing about the chassis though which in my view was the biggest improvement over the GTS models nor aero which together with tyres has been the biggest improvement GT3 Gen 1 to 2.

We continue to wait for facts but a useful insight from Nick.

 

[Twinfan]

Spyder and GT4 mules appear to have identical brakes, but hard to say for sure I agree. I think the engine spec is confirmed now though.

 

[ralphmusic]

Spyder and GT4 mules appear to have identical brakes, but hard to say for sure I agree. I think the engine spec is confirmed now though.

A number of the early cars seem to run PCCB callipers with steel rotors so front and rear look larger than normal. As Boxster priced higher than Cayman, additional cost GT based components would really push that car's price.

 

[Motorhead]

Parts commonality between the GT4 and Spyder would make commercial sense, but I can't see Porsche breaking the mould the second time round.

As a "mainstream" car, I would think that the Spyder has a different development team working on it compared with the GT4. We should expect the GT4 to have a bespoke brake and suspension set-up, as before, with perhaps more rear suspension adjustability this time. Looking at the pics, increased aero downforce will also be a feature - a plus point for the race cars.

A flat-6 n/a engine is a given as far as I'm concerned (I have the evidence!), most likely with 4.0 litre capacity to set it apart from its predecessor and probably a stroked development of the 3.8 litre, with either the same or a slightly reduced rev limit (as per the orginal 4.0 litre GT3 when it was increased from 3.8 litres, albeit with a much higher rev limit than the GT4). I'd be very surprised if it included any of the GT3's bespoke - and very expensive - features.

Jeff

 

[Twinfan]

420bhp and manual only for the GT4 and Spyder twins from the Rennlist source.

PDK will only be available on the 460bhp GT4 RS if they make it, and it'll be the only option.

 

[Bilko1]

All quiet on here for nearly a month! Now less than 10 GT4s in OPCs on the Porsche pre-owned car locator......was in mid-20s a few weeks ago.....probably means nothing......

 

[Motorhead]

Chris,

It's just that time of the year when people start thinking about summer motoring. Nothing unusual there.

With no news on the horizon yet as to when the 718/982 GT4 will be arriving, GT4 sales are strong due to limited supply so prices are still holding up.

Nothing to report on GT4 development after the flurry of activity on-track more than a month ago. With the lines shut down until September while emissions issues are addressed I would expect that a lot of effort is being put into GT4 engine development at the moment, incorporating gasoline particulate filters in particular.

Jeff

 

[ian harvey]

Today's Autocar (reach for tin hat), hints at a forthcoming 718 Boxster Spyder, Cayman GT4 and Cayman R, all running detuned N/A 4.0 991 GT3 engines of varying power (420 for Spyder and GT4). Manual and PDK available on each....