turbo failure???
Turbo Mini Forums

ok most of you know i run a hybrid turbo made by ***.
it has now twice failed, snapping the shaft both times , the current one has done 8 runs at avon at 20 psi , 20 minutes on the street at 15 psi and 3 laps of combe at 8 psi ...there was no warning no lose of oil pressure , i just lost boost .

the first turbo did a couple of track days and that was it before it failed, when i sent it back , they said it was due to hot shutdowns !! which is crap as i know how to cool down a turbo , but it was his word against mine so we ended up going halfs on the repair .



So as no one esle seems to have had a turbo fail in this way , what the hell is causing it???

Everyone knows that instructions only have to be read if the thing doesn't work....

do you run and dumpvalve?

Alex

AlexF

yes he does

Team Racing

is the oil feed ok? any restictions or internally crushed areas of the pipe?

i was just wondering if its getting a restricted oil flow, then building up heat before weakening and then snapping under load? (i say not having a clue what im on about)

i`m leaning towards oil feed problems ....maybe

Everyone knows that instructions only have to be read if the thing doesn't work....

oil feed imo.............

as long as the blower is receiving An oil feed & return............& THIS IS ...ok!???

then this is Bull Shite!!! I can assure you

get into his ribs!

I'm thinking incorrect balance...
I just can't see how oil starvation can snap a turbine shaft, given the scenario Mark described... When I was going through turbos - it was because of my crappy minispares oil pump that wasn't building pressure up quick enough. The failure was blatantly an oil supply problem, but i never snapped a shaft (ok, it's a T2 but even so).
Now you run any turbine even slightly off balance, and it'll self destruct, sometimes as a cyclic fatigue failure (as i suspect is the case here)...

Personally - I'd get the part number needed, and have the turbo rebuilt at somewhere with decent dynamic balancing facilities.

Edited by turbodave16v on 26th Sep, 2005.

think i`ll have a look around the net and see if any one esle has had such "good" workmanship from the same company

Everyone knows that instructions only have to be read if the thing doesn't work....

mark, your being very polictally correct over this!! got to say I'm shocked, but think your taking the correct aproach

Team Racing

try turbo techniks

always looking for them bigger bunches of bannanas

I'm with Dave, personally I think that oil starvation would make the shaft badly worn/scored and knacker the bearings in the centre cartridge up, but I just can't it it causing a shaft to physically snap.
Balance would be my thoughts as well, fatigue failure over many cycles.