@hayzin Thanks Hassan bhai for recommending i appreciate that.....
@Emptyskull am Huzaifa.... am here my self..... welll first of all congrats on your purchase, you got a beast there.... 1HD-T is one of my fav motor....
My dear friend first of all, i will tell you wat 1HD-T can dooo, if tuned up properly.... it can produce upto 175 hp at 3600 rpm (Even more around 200-210 hp with FMIC, Exhaust piping, Snorkel & K&N filter and if diesel pump is properly tuned)....& 361N-m torque at 1400 rpm....
-> Speed & power factor
= It might be due to messed up clutch & pressure plate, or diesel pump or nozzles..... 80% chance is due to clucth & pressure plate...
with these things properly working you can easily touch 180Km/hr at motorway.....
-> Point which you didnt noticed may be..
= Exhaust piping should be according to the engine.... 1HZ version is a non-turbo engine, which uses exhaust piping 2-2.25 inch.... but a turbo version needs a bigger exhaust , minimum 2.5 inch max 3 inch so you can control the Exhaust gas temperature... and you can easily listen to the turbo spool
-> Suspension
= Get it checked & replace watever need to be replaced.... you can find the genuine parts easily...
and yes last but not least.... Get your fuel lines checked..... 