Thanks Paddy, interesting day mapping your car
I will be honest and say when I first drove the car it didn't feel much faster than a standard chipped coupe. Nothing wrong with this if that's how you want the car to drive but given Paddy's modifications and that he is running a GTi-R hybrid turbo, well the idea behind these upgrades is to get a little more ooomph! Here are your fueling graphs from the day for reference. The first run was as the car came i.e. nothing changed.
Fueling Run 1This was peaking at 1.1bar (overboost to 1.2bar) but would quickly drop off giving around 0.7bar at redline. Like your Surrey graph, the fueling was a little lean in the midrange but started to go rich as the boost tailed off.
Paddy mentioned the clutch was slipping a little before he came down but he didn't have time to get it replaced. It proved a little more tricky when we increased the boost as the clutch didn't always like it too much. Boost is now set at 1.3bar peak (overboost to 1.4bar) which tails of to around 1.1bar in 3rd gear upwards. This has obviously produced a significant increase in torque which hasn't helped the clutch. Unfortunately it now slips a little more when hitting peak boost
That said, once this has passed it does grip again (on a flat road
) and it does pull a lot harder!
Fueling @ 1.3barThe fueling is now great and the turbo spools quickly, you can see from the graph the clutch slip as it hits peak boost! The boost in first and second gear is not quite as aggressive so as to maintain traction.
The great thing about Paddy's setup is that the ecu controls the boost and timing, this means both can be retarded as a safety measure should it be needed i.e. inlet temps, engine knocking etc
Look forward to seeing the results once you have a new clutch!