HI Thanks to all for the info will leave it as is for the moment,as yes it does the job very well and I`m only looking to improve its low down rpm when the turbo spools up it`s fine,also get 14.9 towing at 100 kl`m er hour  and my van loaded over a public weightbridge 1 tank full of water was 2280kg`s,thanks again for info.mike g g