Hey,
I have had camshaft problem, one of the lobes has developed a flat spot. So I decided that i should install fast road camshaft from darkside development and rebuild the whole head because i want to exceed 270 bhp in the future . Which included oversized inlet and outlet valves, harder return springs, and black top lifters, higher duration and lift camshaft and a remap. After re assembly of the engine i noticed a huge drop in fuel economy and a rough start on cold engine with some white smoke. Before a used to get 36mpg and idle fuel economy was around 0.7l/h , now i get 26mpg and idle fuel economy is somewhere between 1.2l/h and 1.6 l/h . Since the head work i have tried changing coolant temp sensor , fuel temp sender and i have re adjusted distance between rockers arms and injector ( to the point where you feel noticable resistance then 180° back) before this work fuel economy was 18 mpg and idle fuel economy 2.2l/h . I have done a full VCDS Scan no error on engine module. We don't know what else to do , Darkside development states that they would expect a slight drop in fuel economy but not that much, my tuner adjusted SOI accordingly and torsion value is 0.6° - 1.1° which is spot on according to dark side development.
This is a 1.9 TDI ARL engine that has been remaped before head work and was running somewhere around 200 bhp and fuel economy actually grown since the first remap. But now it's gone downhill.
I don't know what else to do then seek help form forums , i have VCDS so if any of you have a suggestion what should I log and in which conditions so we can resolve this fuel economy.
Thanks in advance,
Hope to hear from any of you soon.
I have had camshaft problem, one of the lobes has developed a flat spot. So I decided that i should install fast road camshaft from darkside development and rebuild the whole head because i want to exceed 270 bhp in the future . Which included oversized inlet and outlet valves, harder return springs, and black top lifters, higher duration and lift camshaft and a remap. After re assembly of the engine i noticed a huge drop in fuel economy and a rough start on cold engine with some white smoke. Before a used to get 36mpg and idle fuel economy was around 0.7l/h , now i get 26mpg and idle fuel economy is somewhere between 1.2l/h and 1.6 l/h . Since the head work i have tried changing coolant temp sensor , fuel temp sender and i have re adjusted distance between rockers arms and injector ( to the point where you feel noticable resistance then 180° back) before this work fuel economy was 18 mpg and idle fuel economy 2.2l/h . I have done a full VCDS Scan no error on engine module. We don't know what else to do , Darkside development states that they would expect a slight drop in fuel economy but not that much, my tuner adjusted SOI accordingly and torsion value is 0.6° - 1.1° which is spot on according to dark side development.
This is a 1.9 TDI ARL engine that has been remaped before head work and was running somewhere around 200 bhp and fuel economy actually grown since the first remap. But now it's gone downhill.
I don't know what else to do then seek help form forums , i have VCDS so if any of you have a suggestion what should I log and in which conditions so we can resolve this fuel economy.
Thanks in advance,
Hope to hear from any of you soon.