Menu toggle

718 Cayman GT4 is here – at long last.!

The car is massively different Brian, and the increased punch in second gear in particular is really noticeable. The LWFW has changed the throttle response, the exhaust the power/torque and sound. As a combination they're brilliant with the only downside being some slight drone between 2k and 3k revs. This seems to be an issue with all the replacement silencer options to a more or lesser degree, and Ninemeister are having a "v2" silencer produced in stainless steel to try and reduce it a bit as I'm sure some owners would find it annoying. I will be testing it in the New Year and if it's any good I'll have my inconel silencer modified to match, although I'm not actually that bothered about the slight drone as I rarely drive in heavy traffic which is where it's most apparent. Along with the geo setup I've had done the car is now brilliant fun to drive. I'm just waiting to see what the GT4RS brings to the table to see if there's anything I can port across from it, otherwise I'm more than happy with the way the car is now.

For those interested, here is the resulting power curve of my car. I don't have a before graph I'm afraid as we only had this run done out of curiosity rather than for marketing or development purposes:

KmjUz3yX.jpg


 
An interesting graph David. Thanks for posting it. I don't doubt for moment your comment that the driving experience of your 982 GT4 is hugely improved as result of your mods, particularly the inter-gear acceleration.

When this coronavirus nightmare is over, and it will be over one day, I would recommend you take your car to a Knockhill PCGB track day. Having enjoyed innumerable passenger laps on this thrilling circuit in both stock and modified 981 GT4's, I can assure you that the undulating, flowing corners adorning this circuit suits the GT4 chassis admirably. There are very few road 911's, and that includes GT3's, that can keep up with a well driven Cayman on this track. Your car in particular would be masterful at Knockhill.

Should the opportunity arise, I would relish the chance to experience a few passenger laps in your modified 982 GT4 at Knockhill. I can also provide a few pointers on the lines and braking points if that is requested. A flowing, hot lap in a well driven Cayman on this track is one of the most satisfying driving pleasures you can have.

Keep it going with the modifying options.

Brian



 
Thanks Brian. Knockhill is a bit of a journey for me but you never know. I'm looking forward to Oulton Park on the PCGB day next year which is my peronal favourute track. Hopefully I'll get a couple of other days in before then to get my eye in [:D]

 
Twinfan said:
The car is massively different Brian, and the increased punch in second gear in particular is really noticeable. The LWFW has changed the throttle response, the exhaust the power/torque and sound. As a combination they're brilliant with the only downside being some slight drone between 2k and 3k revs. This seems to be an issue with all the replacement silencer options to a more or lesser degree, and Ninemeister are having a "v2" silencer produced in stainless steel to try and reduce it a bit as I'm sure some owners would find it annoying. I will be testing it in the New Year and if it's any good I'll have my inconel silencer modified to match, although I'm not actually that bothered about the slight drone as I rarely drive in heavy traffic which is where it's most apparent. Along with the geo setup I've had done the car is now brilliant fun to drive. I'm just waiting to see what the GT4RS brings to the table to see if there's anything I can port across from it, otherwise I'm more than happy with the way the car is now.

For those interested, here is the resulting power curve of my car. I don't have a before graph I'm afraid as we only had this run done out of curiosity rather than for marketing or development purposes:

KmjUz3yX.jpg
Click to expand...

Not sure what we can gain from this, the cars torque capped without a remap, you state torque is higher, but you should have peak torque oem at 420Nm from 5,000 to 6,800rpm, oem it's flat and capped in that range.

At 5k now you seem to have lower torque than oem ! and at 6800 you also have lower torques than oem, just saying. Some times you fit an exhaust for peak BHP gains and you loose some drivabilty which unless it's a race car is not great. PDK has 430NM with the restricted exhaust as an example.

without a before and after the graph there is nothing to see, although it's nice to see a smooth BHP curve all the same to red line. The car will pick up and feel faster as the LWFW will give you that.

but untill you remap out the torque limit cap not a lots going to happen, the 718 GT4 4.0 should see >445NM at a peak around 5,500/6000 rpm and then with a exhaust and remap circa 450bhp peak with 200 cel cats.

only way to remove drone would be the added silencer for a bigger PSE on/off difference, I think you went for non silencer system even PSE off. ?

any way it will sound the bomb, the peak BHP will be up a little and the LWFW will add throttle responce and pick up, so a good start and a nice driving engine that.

why it's taking over a year to see a remapped car with an exhaust on this model is odd.

 
I wouldn't normally entertain responding to you David, but I want to clarify a couple of things:

1. I'm not saying peak torque is raised, I'm saying torque is higher than OEM closer to redline hence the BHP gain i.e. the torque doesn't drop off as much. There's no other way the BHP can increase unless the torque does, as you well know.

2. Torque isn't perfectly flat on the OEM car, it bobbles around a touch as you'd expect. The BGB dyno plots show this too. I don't think Porsche mean the car has exactly 420Nm between 5000-6800rpm, more that it's there or thereabouts. My car is no different in this regard and as I said before it has over 400Nm from 4750rpm to just under the redline. I doubt it's lost any torque from OEM, and according to 9m this dyno is a little conservative on torque figures but pretty much on the money for BHP.

3. I have small bullet silencers and active valves on my car as seen in previous pics I've posted in this thread. 9m are investigating more silencing and resonator(s) as per my feedback for the benefit of more general usage.

4. No-one is remapping their car as they want to maintain their warranty with a brand new unproven engine. 9m would love me to let them have a go with mine but I'm not letting them.

 
The problem with GT4 replacement exhausts is that most are too expensive IMO. It really should not cost more than £1.5k for a SS backbox.

Also, most of the gains will be seen by replacing the headers and OPF pipes. These are very expensive to replace and not worth the outlay IMO..

 
Good to see the track days for next year now live. I've booked myself in for Silverstone and Oulton next year in the GT4, hope to see some of you there!

I'd love to book all of them but not sure my schedule will allow it. Silverstone on a Sunday should be fun, will probably be staying in Whittlebury Park Hotel again the night before if anyone fancies to join? Get up nice and early to grab a garage [:)]

Oli

 
I'll be on holiday so can't do Silverstone, but I'm looking at doing Anglessey, Donington and Oulton. Just waiting for confirmation from someone whether my wife as non-driving passenger attends for free or if I need to book her on as an extra driver...

 
For what I remember it's a small fee for passengers, they will need a helmet too, but you don't have to pay for her as a driver. I'd bring my Fiancee but she gets travel sick...

Well, see you at Oulton I guess, unless I figure out my plans and manage to make Anglesey and it's not all booked up! Or just rearrange the holiday? It is Silverstone after all...

Edit - just realised I was looking at the 2020 calendar, the 2nd of August 2021 is a Monday, silly me.

 
I’ve booked days that were cancelled due to snow and dates were rearranged. I imagine operators will refund if dates don’t work out. But often it tips down with rain and the day is not so enjoyable.

 
That was awfully fast!

They won't be cancelled anyway as they are essential/key services [:D]

 
Yep, I'm on the reserve list for Anglessey too. Had no idea it would sell out so quickly being new to this track day lark...

 
Dave,

As far as I can recall I think that if your wife won’t be driving there’s only a small fee and she’ll need a helmet (usually for hire in non-Covid times) and sign the usual liability form. If she wants to drive she’ll need to be registered and there will be a charge of £30, although this may vary from track to track.

Jeff

 
Thanks Jeff. I assume the passenger fee is payable on the day, the £30 extra driver fee was an option on the online booking. Not knowing what to do I've missed out on Anglessey but hey ho such is life. I'll have to try and get on there for 2022 [:)]

Donington will be where I break my track day duck in August unless I throw an extra one in somewhere earlier...

 
I might join you for Donnington too. I just need to sort the insurance out to make sure I’m covered, insurance companies just discriminate against me as I’m under 30 :ROFLMAO:

I rather hope it doesn’t sell out as fast!

 
There are lots of track day operators, just look up ATDO members. Many run Anglesey, Silverstone, Goodwood etc if Club dates not suitable.

 
I get covered under my Lockton policy for PCGB dates Ralph, but only those unfortunately. I'll be dipping my toe in the water with those two to start with, and for both I've taken the 20 minute tuition option to help me find my feet.

Should be fun!

 
You must log in or register to reply here.

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Porsche
Lockton
Pirelli
Officially approved
Oracle Finance
WEX Esso
Collecting Cars
Archant Dialogue
Back
Top