Prospective 981 GT4 Owners Discussion Forum.

[Phooey]

Jeweller70 said:

2.44 two up at SPA is very, very impressive

Up there with the 996/7 GT3's http://fastestlaps.com/tracks/spa_francorchamps.ht...

[PorscheGT4]

Phooey said:

Up there with the 996/7 GT3's http://fastestlaps.com/tracks/spa_francorchamps.ht...

forget Spa they are faster than the GT3 RS 4.0 lol

seems having the engine in the RIGHT place is worth 100 bhp, so much for GT3 traction advantage !

http://fastestlaps.com/tracks/circuit_de_nevers_ma...

[Mario149]

PorscheGT4 said:

forget Spa they are faster than the GT3 RS 4.0 lol

seems having the engine in the RIGHT place is worth 100 bhp, so much for GT3 traction advantage !

http://fastestlaps.com/tracks/circuit_de_nevers_ma...

By 0.02 of a second, let's not get too carried away here

[PorscheGT4]

a win is a win esp from a car 100 bhp down :-)

take a look a the 09 GT3 it's 2 seconds off the GT4 time in the same mag testing !

[Patent]

Mario149 said:

PorscheGT4 said:

forget Spa they are faster than the GT3 RS 4.0 lol

seems having the engine in the RIGHT place is worth 100 bhp, so much for GT3 traction advantage !

http://fastestlaps.com/tracks/circuit_de_nevers_ma...

By 0.02 of a second, let's not get too carried away here

Clearly very impressive with 115bhp deficit and ?similar weight!

[Steve Rance]

PorscheGT4 said:

a win is a win esp from a car 100 bhp down :-)

take a look a the 09 GT3 it's 2 seconds off the GT4 time in the same mag testing !

Except its not a race. I've done a 2.45 around Spa in a 996 GT3RS on original cups. On cup 2's it would be quicker. A well driven 4.0 on Cup 2's will be quicker still.

Although I am pleased to see that the GT4 is looking like a very good car, dont get too excited about lap times. The only time that they are representative is in race conditions otherwise, i'd ignore them.

[hunter 66]

Nice little cars Steve ....... he lost maybe 2 -3 secs as well by being baulked on the entrance to Blanchimont and have to go way off line with a big lift so with only one person sub 2.40 looks good , amazing .....
996 Cup times nearly ...
Progress is unstoppable but as you say Steve is it everything

[Mario149]

Steve Rance said:

Except its not a race. I've done a 2.45 around Spa in a 996 GT3RS on original cups. On cup 2's it would be quicker. A well driven 4.0 on Cup 2's will be quicker still.

Although I am pleased to see that the GT4 is looking like a very good car, dont get too excited about lap times. The only time that they are representative is in race conditions otherwise, i'd ignore them.

This^^, listen to the man that knows

[Jeweller70]

There a lots on here who have raced and done well at SPA,

It looks like a sub 2.40 could be possible on road tyres (albeit very good tyres). I think its even more impressive in non race conditions, race weekends tend to drag the times up from testing and certainly track days. Again that time was 2 up with traffic

Would like to see a 991 GT3 time from a good driver for comparison

British GT times in GT4 class this year was 2.33-239 on brand new hot stickered slicks in qually,

My feeling is out of the box the GT4 would pip a base 997 GT3 on the same rubber. I just hope its as much fun as a 997 GT3

[Steve Rance]

From memory, British GT ran on Avons - not sure what the control tyre is now? When we were racing in Carrera Cup on the Mich control tyre the lap times were several seconds quicker than the Comperable Cups running in Brit GT on Avons. Plus I think the Brit GT boys had min ride geight penalties for equalisation purposses. My point is that lap times are so subjective. What were the tyres, who was driving the car, was it standard, what was out the previous day on the circuit (ie what rubber has been laid down etc..

[Jeweller70]

Steve agree with all your points

BGT is on AVONs (they now go on hot to the gentlemen driver doesn't bin it), my team ran a car at SPA this year and we also know how much power some of the GT4's are running, (significantly more than 380) in cars that are around 1250kg (Evora). I don't count the Ginetta as its ground up race car.

I am just surprised how quick the GT4 is on its OE tyres.

As said I agree as an absolute measure it is meaningless.

But to me it looks like a road GT4 on Avon Slicks could run a respectable time in the BGT field. I cannot think of any road car that could do that.

Imagine what a fat full cup version could do

[AD64]

nice little GT4 ownership diary going on here -

http://www.planet-9.com/981-cayman-gt4-chat/108377...

[mollytherocker]

Mario149 said:

PorscheGT4 said:

forget Spa they are faster than the GT3 RS 4.0 lol

seems having the engine in the RIGHT place is worth 100 bhp, so much for GT3 traction advantage !

http://fastestlaps.com/tracks/circuit_de_nevers_ma...

By 0.02 of a second, let's not get too carried away here

What are you talking about?! Faster is FASTER! My car is faster than yours....my dicks longer than yours....I am BETTER than you!

Its ALL that matters!

[braddo]

mollytherocker said:

Mario149 said:

PorscheGT4 said:

forget Spa they are faster than the GT3 RS 4.0 lol

seems having the engine in the RIGHT place is worth 100 bhp, so much for GT3 traction advantage !

http://fastestlaps.com/tracks/circuit_de_nevers_ma...

By 0.02 of a second, let's not get too carried away here

What are you talking about?! Faster is FASTER! My car is faster than yours....my dicks longer than yours....I am BETTER than you!

Its ALL that matters!

Those hundredths make all the difference for someone like MrD, who has said in the past he likes to potter around at 80% on track days and can't understand why anyone bothers with heavy braking from 140mph on track days.

[fioran0]

Jeweller70 said:

BGT is on AVONs (they now go on hot to the gentlemen driver doesn't bin it), my team ran a car at SPA this year and we also know how much power some of the GT4's are running, (significantly more than 380) in cars that are around 1250kg (Evora). I don't count the Ginetta as its ground up race car.

What sustained G values are you seeing on the BGT Avons generally (long and lat)?
I'm always curious what they are giving but haven't seen anyone about to ask what their data said on that.

[Jeweller70]

FioranO

PM me I can send a VBOX file or Video WMV with GPlot from VBOX. I can't remember off hand. The car is a 2014 Evora GT4 (NA Cosworth engine, Xtrac box, Ohlins TTX)

We had Ben Clucas in the car who most agree is very quick

There is a big variance in areo on in the GT4 class due to the balance of power testing as you know. Our car runs the maximum permissible aero and minimum ride height allowed't

Not sure you will be able to correct the Lat g to see the time gain due to Slicks v MPC2 without understanding the effect of the areo if that is what you are thinking?

This is why I am impressed with the time.

[PorscheGT4]

braddo said:

Those hundredths make all the difference for someone like MrD, who has said in the past he likes to potter around at 80% on track days and can't understand why anyone bothers with heavy braking from 140mph on track days.

that's why I sold my GT3 which is faster than my R then !!!

if times counted I would be In a 991 GT3 or a 991 Turbo S with cups but I choose to drive 330 BHp Cayman !

I don't race, and just like a track day now and again.

[iantr]

Jeweller70 said:

2.44 two up at SPA is very, very impressive

It certainly is.

Out of interest I thought I'd take a look at the F1 lap record:

1:47.263 by Vettel in 2009!

I know that this (or the side by side version) has been posted here before, but it's worth seeing again...

http://www.youtube.com/watch?v=Ex5dhhpSHCw


In other news I drove the black GT4 in the pouring rain at PEC Silverstone yesterday. Observations to add to the pile:

1. I'm pleased I've ordered the LWB's. My current S has buckets and they are definitely worthwhile if you get on with them.
2. PSC2's surprisingly good in the wet
3. The car felt very safe - no sense that it would bite. When it understeered (yes I know...) it did so progressively and was easy to finesse back on line for example on the right hander just after the crest
4. It sounds great! Several comments on this from people in other cars on the day. It sounded even better when I turned PSE on for the last 10 minutes, doh..!
5. No rear wiper was a slight PITA when it was really wet
6. Steering felt fantastic to me. Definitely more positive on turn-in than my S
7. Gearing was perfect for a wet day ;>
8. Brakes felt good - not really any different to the PCCB's in my S as far as I could tell - although it was a wet day
9. I only found 5th once when pushing through the gate with purpose. My fault not the car
10. The additional torque from the 3.8 was v noticeable and v agreeable on a such wet day

Edited by iantr on Tuesday 15th September 19:49

[ChrisW.]

If LWB's are unavailable, what of the CS pack ?

[fioran0]

Jeweller70 said:

FioranO

PM me I can send a VBOX file or Video WMV with GPlot from VBOX. I can't remember off hand. The car is a 2014 Evora GT4 (NA Cosworth engine, Xtrac box, Ohlins TTX)

We had Ben Clucas in the car who most agree is very quick

There is a big variance in areo on in the GT4 class due to the balance of power testing as you know. Our car runs the maximum permissible aero and minimum ride height allowed't

Not sure you will be able to correct the Lat g to see the time gain due to Slicks v MPC2 without understanding the effect of the areo if that is what you are thinking?

This is why I am impressed with the time.

Thanks, I don't have anything to read VBox files and the Gplot wouldn't be as interesting (I have Motec, Magnetti Marelli and AIM).
It wasn't in comparison to MPSC2 where I was going with this, rather I was curious how the grip was looking from the Avons used relative to other slicks.
While the new MPSC2 is pulling some incredibly impressive sustained numbers, I wasn't interested in that comparison with respect to the Cayman GT4 times. The Cayman has ABS, TC (in its various guises), active diff (using brakes, the LSD is there only to look cool), torque vectoring, proactive bias control etc all on there. While they can't give more than the tyre is capable of giving, they can pretty easily ensure all of the tyre is given having been designed for exactly that purpose. Each new generation of car comes with the control side to do this specific task even better than before.

What's the story with the aero on the Evora GT4? The GT4 spec car was sold as being zero lift as a result of its aero package generated downforce last I saw/heard - and I see it is still that way on the lotus info currently. I couldn't see lift numbers for a regular non aero Evora to try and see what that meant in terms of magnitude.

Edited by fioran0 on Tuesday 15th September 22:45