Modified 981 GT4
Discussion
ChrisW. said:
I am at Donnington on the 18th ... it’s an unlimited day and I need to find out how loud the quiet exhaust is in practice.
First real impressions are this morning ... I went into work early to get new front tyres fitted and not only does it pull like a train to the limit in third (I didn’t want to do more and brought it straight back down to 75) but it sounds and feels visceral, ... so alive.
The steering is noticeably more free and with the revised Geo it handles in a significantly more responsive way ... so far !
P.S. I discovered that the ARB’s have been set front mid and rear hard ... I may need to play with this ...
Sounds good. First real impressions are this morning ... I went into work early to get new front tyres fitted and not only does it pull like a train to the limit in third (I didn’t want to do more and brought it straight back down to 75) but it sounds and feels visceral, ... so alive.
The steering is noticeably more free and with the revised Geo it handles in a significantly more responsive way ... so far !
P.S. I discovered that the ARB’s have been set front mid and rear hard ... I may need to play with this ...
Edited by ChrisW. on Wednesday 29th May 15:31
I ran those that ARB set up for the second half of the season last year - makes the front end very positive by taking some grip away from the rear - therefore 'easier' rotation. I ran it at Silverstone 2nd &3rd days, Goodwood 2nd day, and Oulton Park.
I've went back to Med/Med for the start of this year - Oulton Park and Spa - and will run Silverstone and Donny (Porsche GT days) with Med/Med and then go back to Med/Hard for the next Silverstone and Donny (PCGB days) back to backs.
TDT said:
Sounds good.
I ran those that ARB set up for the second half of the season last year - makes the front end very positive by taking some grip away from the rear - therefore 'easier' rotation. I ran it at Silverstone 2nd &3rd days, Goodwood 2nd day, and Oulton Park.
I've went back to Med/Med for the start of this year - Oulton Park and Spa - and will run Silverstone and Donny (Porsche GT days) with Med/Med and then go back to Med/Hard for the next Silverstone and Donny (PCGB days) back to backs.
For really fine tuning, you can set one side of the ARB at say, middle hole and the other on harder or softer holes.I ran those that ARB set up for the second half of the season last year - makes the front end very positive by taking some grip away from the rear - therefore 'easier' rotation. I ran it at Silverstone 2nd &3rd days, Goodwood 2nd day, and Oulton Park.
I've went back to Med/Med for the start of this year - Oulton Park and Spa - and will run Silverstone and Donny (Porsche GT days) with Med/Med and then go back to Med/Hard for the next Silverstone and Donny (PCGB days) back to backs.
Update from Donny ...
The very kind people at race control monitored the noise level throughout the day.
The maximum drive-by measured was 98.7dB ... GT4's etc often measure 100dB ... a Lambo on the day measured 111dB.
So, the new exhaust is probably quieter than the standard exhaust .... and the quality of the sound is amazing ...
As for performance ? It just pulls ... and it handles ... it is now a very cohesive package ... Standard GT4 + 20% ??
I'll let the passengers answer that one
The very kind people at race control monitored the noise level throughout the day.
The maximum drive-by measured was 98.7dB ... GT4's etc often measure 100dB ... a Lambo on the day measured 111dB.
So, the new exhaust is probably quieter than the standard exhaust .... and the quality of the sound is amazing ...
As for performance ? It just pulls ... and it handles ... it is now a very cohesive package ... Standard GT4 + 20% ??
I'll let the passengers answer that one
ChrisW. said:
Update from Donny ...
The very kind people at race control monitored the noise level throughout the day.
The maximum drive-by measured was 98.7dB ... GT4's etc often measure 100dB ... a Lambo on the day measured 111dB.
So, the new exhaust is probably quieter than the standard exhaust .... and the quality of the sound is amazing ...
As for performance ? It just pulls ... and it handles ... it is now a very cohesive package ... Standard GT4 + 20% ??
I'll let the passengers answer that one
This sounds like a weapon on track with the new set-up. Do you have any lap time comparisons from your trip to Donington? The very kind people at race control monitored the noise level throughout the day.
The maximum drive-by measured was 98.7dB ... GT4's etc often measure 100dB ... a Lambo on the day measured 111dB.
So, the new exhaust is probably quieter than the standard exhaust .... and the quality of the sound is amazing ...
As for performance ? It just pulls ... and it handles ... it is now a very cohesive package ... Standard GT4 + 20% ??
I'll let the passengers answer that one
HI Chris , thanks for the ride , the car is as you say a "race car" for the road . You have it working really well hence have great confidence in it . For me the most impressive was on the brakes and late turn in at the chicanes and hairpins . Impressive package , worth the expenditure
It felt like a mid engine GT3 and just pulled at any revs with no dive or roll on those 3 ways.
Great car. I am not sure what impressed me the most, the new engine, the shocks or the brakes, all 3 are now mega.
Be interesting to see a national track time in that now over what you have done before, if you book on another day let me know and I'll book the GT3 on.
Great car. I am not sure what impressed me the most, the new engine, the shocks or the brakes, all 3 are now mega.
Be interesting to see a national track time in that now over what you have done before, if you book on another day let me know and I'll book the GT3 on.
hunter 66 said:
HI Chris , thanks for the ride , the car is as you say a "race car" for the road . You have it working really well hence have great confidence in it . For me the most impressive was on the brakes and late turn in at the chicanes and hairpins . Impressive package , worth the expenditure
........Late turn-in??? Have you forgotten how to find those extra seconds ChrisW??ChrisW. said:
It’s all comparative ... that’s why I keep taking coaching
Thanks for the feedback, I thoroughly enjoy giving passenger rides ... at Snetterton with PCGB next week !
Yes, I'll be there Chris, with plenty of corners for early and progessive turn-in!! Thanks for the feedback, I thoroughly enjoy giving passenger rides ... at Snetterton with PCGB next week !
Look forward to seeing you there, H
TDT said:
Gonna write up my passenger review of the package later today.
Chris, I’ve sent you link to YT vid of the first session of me running behind you.
Will also upload the late afternoon session later today.
Just watched your vid mate. Chris has always been very quick in his car but bloody hell it's mega quick now. A new out of the box 718 GT4 is not going to keep up with that!Chris, I’ve sent you link to YT vid of the first session of me running behind you.
Will also upload the late afternoon session later today.
p.s Nice driving from you as well!
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