Just wondering tho if a run a bead of stainless steel filler along the crack with the Tig will it make it worse or just crack again ?
Could be any number of things... could be a tired turbo full stop... slightly retarded timing... poorly finished/quality intercooler... a rough head... loads of things. Those cracks will barely lose you a single hp.Was down on power ,to be honest a think the mapper couldn't be arsed he even tho he was meant to be a mapping god
Cant say i have come across a "tired turbo" that loses power..when they are worn they normally still provide normal power as long as the blades are not catching the housings which is 9 times out of 10 the compressor side(inlet) caused by severe bearing fail.Could be any number of things... could be a tired turbo full stop... slightly retarded timing... poorly finished/quality intercooler... a rough head... loads of things. Those cracks will barely lose you a single hp.
oil going into the inlet is normally caused by the cartridge not draining oil fast enough and this is with positive crankcase or sump pressure stopping it draining via gravity. There is very little chance of oil getting past the oil seals on the inlet side to cause any problems as at this stage the journal is that worn including the thrust bearings there is probably impeller interference anyway.By tired i mean something thats passing oil into the inlet, or had damage to the impeller. Still not gonna lose loads of power, its probably not long for the world at that point anyway.
I've seen it on quite a few engines, on one or two the intercooler has been partially clogged with oil.oil going into the inlet is normally caused by the cartridge not draining oil fast enough and this is with positive crankcase or sump pressure stopping it draining via gravity. There is very little chance of oil getting past the oil seals on the inlet side to cause any problems as at this stage the journal is that worn including the thrust bearings there is probably impeller interference anyway.
Not often it's down to the turbo causing that - plug/coil pack breaking down/restricted exhaust/boost control solenoid clagged up common on the EJ20.Was down on power ,to be honest a think the mapper couldn't be arsed he even tho he was meant to be a mapping god
And a very high risk of "running on"...hours of entertainment on youtube watchin all that malarkeyI've seen it on quite a few engines, on one or two the intercooler has been partially clogged with oil.
Having said that, you're quite correct, more likely higher crankcase pressure on worn engines causing blowby on overrun.
Still, this oil into the intake will have negative effects on power, lowering the det limit as well.
Sorry for the late reply ,yes it was Andy F ! How did you guess ?Not often it's down to the turbo causing that - plug/coil pack breaking down/restricted exhaust/boost control solenoid clagged up common on the EJ20.
Was the mapper A.F by any chance ?
Sorry for the late reply ,yes it was Andy F ! How did you guess ?
Cars not back together yet , got another mapper in mind once the car is up and runningNot many mappers North of the Border who map Subaru's plus i'm heavily involved in the Subaru scene.
Hope you managed to sort the running issues out