Right lets calm this negativity down a bit. Nothing wrong with diesels. They are frigging awesome when developed properly. I don't particularly want the fook off fuelling costs of a 3.2 everyday thank you very much. I am doing this project to make her solid for a long time to come. So each step needs to be methodical.
I had an awesome day with Ned at Autolusso today. Got taken out for a blast in his 3.8 sequential box, famous red ex top gear GTA saloon..Absolutely brutal. Awesome utterly awesome. The way she puts down the power is beyond belief. Even from just about standstill..Like a pussy cat in traffic then when the whim takes, a proper super car when pushed hard. Proper game changer...And properly on my list for my GT, when the postcode lottery bimbo knocks on my door with the huge winning cheque..;-)
And there are solutions to this clutch dilemma. I drove Craig's 2.4 156 today with fixed smf and ceramic and organic clutch. And to be honest it was quite a task in traffic. Ned is correctly suggesting a fixed smf with GTA clutch, so its not overly brutal in traffic and also as the flywheel is fixed does not induce the slipping motion on the clutch. Put it this way Ned's 3.8 GTA has this arrangement and has not slipped once with the brutality of the sequential box.. The problem with an overly aggressive stage 3 organic/cerametallic is it will wear the DMF in no time!!
The other aspect is the way the car is mapped. The early strong torque point on my car is around 2.7k and that's where the clutch lets go..Clutch pulls like a freight train before and after that point. Joel told me today his 147 jtd, which is putting out a healthy 270 odd bhp and over 500nm of torque is mapped very conservatively before this early torquey peak region, to protect the drive train and clutch, and then ramped up after for big manageable peak power.
As i am well aware, at this point my car needs proper bespoke mapping, as it will probably have a higher peak than Joel's car at that early peak point...So there you have it.
At this point in time with what power i want to achieve, there is no having your cake and eating it too. I will forego certain oem creature comforts. But at the moment the lighter weight smf and GTA clutch seem to make the most sense.
excellent stuff, as you know mate i'm right behind you on this journey...to use an analogy I'm glad you are the one up front with the machete clearing the path!
I had forgotten that A) you have yet to have a custom map on a dyno, and that B you are still on effectively a ''stage one'' clutch, I have been in your car and assumed given the power and nature of that power that you already had something a bit ''bespoke'' in there.
so in reality you are right on schedule really...
I don't think the drive train other than the clutch is a particularly weak point given the torque that is produced by these cars even in stock form is fairly high for the HP...its just the tuning you are doing is approaching 60% more power than it as designed for...I suspect secretly you are aiming to double it...given your last car was 300 BHP ,correct me if i'm wrong..?
you could just go dual friction paddle but as you said its almost the last resort. if the GTA kit works and is a reasonable compromise in all conditions then you have your solution.
TBH we are in exactly the same position you and I as the next stage off modding on mine will probably be beyond what the current transmission can handle( and i have already done it once!) , so we are both having to undertake further clutch upgrades and Custom maps..
maybe if we go to red dot together we could get a discount ? and that would be a fun day out!
my FMIC and hybrid will go on in Jan so maybe we are on schedule for that...
I fully agree also that although a petrol 3.2 would be quicker out of the box the fuel costs would be horrendous. I have done the maths and if I keep the car three years my modding costs are paid back by fuel savings vs a similar powered petrol car.
and finally your ''setbacks'' have to be put in context.
A) you don't accept any less than perfect, some of what you have developed further would have been enough for most at a much earlier stage, so your own high standards mean the cost will be higher than for most.
B) your goals although achievable are right on the edge of what is! pushing the envelope always has a financial element to it and there will be the odd spanner in the works to overcome.
bottom line your GT on balance is the best diesel car I have ever sat in (including a 330d m sport) and its pretty high up the list even vs some of the high performance petrol's I have driven. its a fantastic achievement.