Tuning xud on veg..

[ozonehostile]

Still tune the pump and turbo the same for derv or veg, and unless you run pure derv then veg you wont necessarily notice much difference. diesel is higher octane than veg oil so if your after ultimate poer figures from your tuned xud, derv is the way to go, but if you want to lower the running costs but still have a bit of poke then 50/50 mix (in cold weather anyway) will be fine.
just need regular fuel filter changes when running veg, again, especially in the cold as it does tend to clog up