DVS JEZ

di both you guys have a crank collar fitted or r33 crank or similar?

before i knew any better i was running my old GTR with T04z with stock ecu and injectors etc for 3 months & 1500k's was running it in, normal driving was fine, boosted up hard and was running 10psi with a 50mm external gate. now that i know better i would not recommend this to anyone however, and due to the above point i will jump on the band wagon and say that the stock ecu MAY be able to handle it for a little while. the post about fuel wash i think isnt correct, no matter what turbo is on the car, the TP on the stock ecu(load point) when cruising is run on the load table of the ecu, the load point selected by the ecu is governed alot by the airflow meter signal, eg 3000rpm with stock turbo will be ramping hard onto boost and on a fairly high load point (TP). 3000rpm with a T04Z will be starting to spool and will be on a lower load point (TP) so cruising with a T04Z will be fine.

was it connected at either end?

check for vaccuum leaks, check all intake piping, cooler piping, vaccuum hoses etc etc etc.

get a smoke test done on the intake, will find the leak

good you found an issue, but have you tested it now? hows the boost issue

so you fixed the aircon? after the 41degree day last saturday while we were tuning your car boiling our asses off

hopefully they turn up before the 5th of march so i can use them at wakefield.

make sure the fuel reg has the vaccuum line connected to it, check for anywhere that loose line can reach too,

too much boost and no fuel(way too lean) will make little power. check the wastegate flap can swing fully open and closed, if you have a split dump pipe check the flap isnt fouling on the splitter

did it do it as soon as you installed the turbo? do they require different oil restrictors for the GTX35? take the dump pipe off and have a good look around the turbine

doesnt sound good man, how is the tune on the engine? any reason you can think of as to why it has worn out this quickly

i know of heaps of cars running atmo BOV's with out over fueling issues, yes sometimes they try to stall but never over fueling issues. OP see if you can borrow an air flow meter off a mate or on a cruise night etc, this is the best way to diagnose if its the cause

do a compression test, start on cylinders 6 and 5, hopefully the engine is ok and if anything the turbo seals are leaking. another thing to try is get an oil catch can but dont plumb it back in at air intake, only at the PCV, mine started to blow small amounts of blue smoke due to a build up of oil in the cooler piping, cleaned this all out and setup my catch can to breath atmo (but it breaths near the air filter) the way i see it is the high amount of vaccuum that the breathers normally get before the turbos actually suck the oil out of the head (too an extent)

i rebuilt my RB26 in my last GTR, then found out about all of the oil control issues, so i stripped it back down, got the crank collar done(but left pistons in the cylinders), fitted oil restrictor, new tomei pump, rear oil drain from the head, and since i put it back in it was breathing heavier

valve stem seals must be leaking, did you replace the stem seals and valve guides when you rebuilt the engine

i do agree with you but there is a lot of skylines running stock ecu and atmo BOV without any issues

^^^ yep, if the ecu doesnt recognise the aircon is on it wont know to idle up, or because the aircon wasnt working when tuned he hasnt setup the air con step idle control

if a mate has another stock AFM that you can try that will help with diagnosis, if that doesnt work, try another ecu. where are you located?

if possible i would use a centre punch and mark the 1st housing with 1 dot and mark the centre housing with 1 dot so the dots line up when refitting, and 2 dots on the 2nd turbo. yep just undo all 6 or so bolts and then carefully twist and remove the rear housing. when refitting make sure the turbine spins after install

you can do it at home but if they are old turbo's they can be really stubborn, new turbo's are easy,

what i mean is the engine seemed to have blowby once i fitted the rear drain to the passenger side, basically the oil return does return oil from the head to the sump but it also is a passage for crankcase pressure to make its way back up to the head.

^^^sounds like text book Yavuz talk Wolverine ^^^

ok, my old GTR i ran the oil drain to the rear turbo oil return on the passenger side as i was running a single turbo and had a spare oil drain spot, on my current GTR i have the oil drain running to the drivers side and have a fitting welded into the sump. both setups work however i noticed that the oil return on the passenger side made my engine breath a little heavier