Oh Dear

[youbUTEy]

ok, this is exceptionally weird

the past 2 weeks or so whenever i have turned the car on, the turbo has spun fine.

although today i modified the oil intake as it was leaking the old way.

and when the car starts, the turbo spins and then just gradually slows down and comes to a COMPLETE STOP

and on idle, it just sits there, no spinning.

give it some juice, and it spins fine, but let it fall back to idle and it slows to a stop.

this kinda freaked me out, because i am just about ready to get the exhaust made and thats all that left to do.

and now this.

so please boost help me.

ok, no there is no evidence of scratches on the walls, so the blades are not hitting the side. and i cant move the shaft so there is no shaft play, although i can easly spin the turbing, and both the intake wheel and exhaust wheel have no obvious problems, everything looks 100% perfect. but it just doesnt spin at low revs.

its weird

its a new T04e turbo

HELP

[Douse]

Um.....im pretty sure the turbo doesn't spool at idle...

[youbUTEy]

there is still air coming thru the manifold, it still has to spin the turbine.

it has never stopped before...

[GUN_METAL_GTR32]

as am i.

but even at idle u r still having small revs which still make small amount of exhaust gas true.

correct me if im wrong

[Moodles2]

I thought even with new turbos, some shaft play is "healthy".

[Douse]

Fair enough, that makes sense.

[youbUTEy]

ok i have also heard that a little bit of shaft play is OK

but the whole turbine stopping spinning?

surely that cant be ok

[CEF11E]

depends how big the turbine is, how much gap there is between it and the housing and how much exhaust gas flow there is.

big turbo on a little engine will do what you discribe

cheers!

[Adriano]

Its not uncommon for a turbo to not spin at idle

[youbUTEy]

wow you guys have really put a smile on my face.

i was convinced it ment certain death.

although... t04e on rb25...?

[R31Nismoid]

external or internal gate?

do you have exhaust leaks?

being you have no exhaust, it will be hard to tell just by ear

It should be spinning IMO

[youbUTEy]

its external gate.

with no exhaust its impossible to hear for any other strange noises.

its wet float bearing, not BB

could not enough oil make it stop spinning?

[axe s]

Is it garrett or China turbo??

not enough oil could do it, but you would need next to no oil...

check your gate is working correctly...

[youbUTEy]

its a china turbo, reason being that i want to see how they work as i am using the car as a track car only

wastegate is fine, working as it should.

as soon as i give it some herbs it spins, the boost guage indicates boost is being made and it appears to be fine.

when i stop, it just chills and slows down

[STATUS]

its a china turbo, reason being that i want to see how they work as i am using the car as a track car only

wastegate is fine, working as it should.

as soon as i give it some herbs it spins, the boost guage indicates boost is being made and it appears to be fine.

when i stop, it just chills and slows down

its common for the china stuff to stop spinning at idle....

[youbUTEy]

ok thats good.

but as long as it dosent make any strange noises or hit the walls and boost when its booted then it should be allright?

[R31Nismoid]

track car using china turbos

oh the humanity

Hope it holds together and doesn't make mince meat out of your motor

[BANGN]

some turbos spin at idle, ball bearing types would be easier than normal but all comes down to exhaust wheel getting enough gas to spin and engine creating enough vacume to drag the wheel around

if turbo is large then prob wont spin at idle unless its got sufficent gas to turn it

Edited June 3, 2009 by BANGN

[youbUTEy]

track car using china turbos

oh the humanity

Hope it holds together and doesn't make mince meat out of your motor

well experimenting with different turbos and sizes before making the final selection, and simply do not have the budget to get the top of the range for all of them.

as much as i would like to lol.

[R31Nismoid]

why dont you just do the maths on paper to workout the best turbo and go from there?

Or set your goals and then read the forum... i doubt there is someone that hasn't already played with a setup you are looking at