tryed on a aaz pump 45psi at 1000 engine rpm , and on 3 of my M tdis are all 80ish psi at 1000 engine rpm 2 off the pumps are built from landrover 200 tdi pumps all parts swaped over and rebuilt the same spec + gov mod and lda , i have a range rover tdi stock one so i will put the gauge on it and see what it reads .
i have put biger injectors in one of the M tdis .216 and will change the PRV so i get 45psi at 1000 rpm and see how she goes
GOT it down to 50psi at 1000 engine rpm and biger injectors and no difrance 3000-3500rpm when it cuts on to 3 ,120psi on the pump when she cuts on to 3 ,
any thoughts what could be causing this
i stuck in a nother set of injectors with bigger nozzles and it dont cut down to 3 untill higher up the rev range ,so its a bit beter, just thinking could i be over pressurizing the injectors , so making tham stay open a little ,190bar thay are, this would explain the smoke from the exhaust when it goes on to 3 and 2 cylinders , dose this make sense
Weak valve springs, improper lifters, high boost and high oil pressure can cause this. High boost and rpm help to float the valve and high oil pressure overextends the lifters. This holds the valves open causing misfire and huge white smoke. Recovery takes several seconds at low rpm My TD would do this in the cold (80psi oil pressure) at high boost and revs, car would stall completely and not restart until the lifters bled down, 1 minute or so. Scary the first time it happened.
Make sure you are using correct lifters for the valve springs. Older 8mm stem dual spring heads used different lifters than newer single spring, 7mm stem heads. Old lifters will pump up easily with single springs.
Weak valve springs, improper lifters, high boost and high oil pressure can cause this. High boost and rpm help to float the valve and high oil pressure overextends the lifters. This holds the valves open causing misfire and huge white smoke. Recovery takes several seconds at low rpm My TD would do this in the cold (80psi oil pressure) at high boost and revs, car would stall completely and not restart until the lifters bled down, 1 minute or so. Scary the first time it happened.
Make sure you are using correct lifters for the valve springs. Older 8mm stem dual spring heads used different lifters than newer single spring, 7mm stem heads. Old lifters will pump up easily with single springs.
nice one ,i will look in to this