Hi Simon,Ok it seem that a remap needs to installed to make proper use of eithe option
So next question, which remap?
I drove from calais to colliore in one trip in August in my 90 and found it was very happy in stock 5th at 81mph. I know it revs a little lower than a 75 but I don't think it would make a big difference, maybe a MYP would make it a little more quite!Straw pole.
For more relaxed motorway cruising,in France (75Tdi, un chipped ATM.)
what is the best option- longer 5th or 6speed box?
cost is obviously a factor but not an overriding one.
Thoughts please..
True. Cruise control is also key to reduction of fatigue in the longer trips. One thing worth noting is that with the PTW you effectively get two longer motorway-speed gears - 5th is slightly taller than the 75 gearbox (nearly as high as that in the Tdi90 compared to the original GPK 5th) ; 6th is longer than that in MYP. Economy is about the same in both. Which I use depends on the terrain and the driving conditions and the consequent average speed. Most of the country-length journey will be in 6th as I do the long drive overnight with minimal traffic. However - I often will do certain portions of the journey in 5th such as the approach to Glasgow and then heading southwards on the M74 ; likewise approaching and leaving Bristol. Slightly lower average speed, hillier terrain, more traffic, and so on. The key aim is to keep the engine at a sweet spot around 2200rpm.If you’re getting it mapped then if you can find one, the PTW has marginally longer gears. @Robin_Cox runs one on his mapped 75 and regularly drives the length of the country in it.
Indeed, it does, but in my case this is offset by the wind noise coming from my OSS (I am guessing a few rubbers strips are starting to show their age)I drove from calais to colliore in one trip in August in my 90 and found it was very happy in stock 5th at 81mph. I know it revs a little lower than a 75 but I don't think it would make a big difference, maybe a MYP would make it a little more quite!
Exactly this. 2200rpm is peak torque on a TDI75 - at least, unmapped. The map will broaden the torque curve to an extent, but I sit at 60mph on cruise on the motorway at those revs in my (mapped) OEM 5-speed because the engine is so quiet there, plus it'll easily accelerate to change lanes for overtaking the lorries, and hold that speed up any incline I've yet come across.The key aim is to keep the engine at a sweet spot around 2200rpm.
On both my tdi 75 6-speed conversions (PTW and NTG which is to all intents and purposes an MYP) I swapped over to the start-stop starter off something like a Q3 or the equivalent Seat. A pokier starter than the original and the pinion fits the flywheel properly. From memory they are often described as CAYC starters or something similar when you are looking for them. The connector needed to be swapped over as they use a different plug to the original if I remember correctly.Do you need to change the starter when fitting an MYP ?