youbUTEy Posted June 3, 2009 Share Posted June 3, 2009 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 Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/ Share on other sites More sharing options...
Douse Posted June 3, 2009 Share Posted June 3, 2009 Um.....im pretty sure the turbo doesn't spool at idle... Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634272 Share on other sites More sharing options...
youbUTEy Posted June 3, 2009 Author Share Posted June 3, 2009 there is still air coming thru the manifold, it still has to spin the turbine. it has never stopped before... Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634289 Share on other sites More sharing options...
GUN_METAL_GTR32 Posted June 3, 2009 Share Posted June 3, 2009 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 Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634294 Share on other sites More sharing options...
Moodles2 Posted June 3, 2009 Share Posted June 3, 2009 I thought even with new turbos, some shaft play is "healthy". Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634295 Share on other sites More sharing options...
Douse Posted June 3, 2009 Share Posted June 3, 2009 Fair enough, that makes sense. Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634299 Share on other sites More sharing options...
youbUTEy Posted June 3, 2009 Author Share Posted June 3, 2009 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 Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634786 Share on other sites More sharing options...
CEF11E Posted June 3, 2009 Share Posted June 3, 2009 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! Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634875 Share on other sites More sharing options...
Adriano Posted June 3, 2009 Share Posted June 3, 2009 Its not uncommon for a turbo to not spin at idle Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634903 Share on other sites More sharing options...
youbUTEy Posted June 3, 2009 Author Share Posted June 3, 2009 wow you guys have really put a smile on my face. i was convinced it ment certain death. although... t04e on rb25...? Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634906 Share on other sites More sharing options...
R31Nismoid Posted June 3, 2009 Share Posted June 3, 2009 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 Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4634960 Share on other sites More sharing options...
youbUTEy Posted June 3, 2009 Author Share Posted June 3, 2009 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? Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4635011 Share on other sites More sharing options...
axe s Posted June 3, 2009 Share Posted June 3, 2009 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... Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4635028 Share on other sites More sharing options...
youbUTEy Posted June 3, 2009 Author Share Posted June 3, 2009 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 Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4635044 Share on other sites More sharing options...
STATUS Posted June 3, 2009 Share Posted June 3, 2009 its a china turbo, reason being that i want to see how they work as i am using the car as a track car onlywastegate 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.... Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4635048 Share on other sites More sharing options...
youbUTEy Posted June 3, 2009 Author Share Posted June 3, 2009 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? Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4635049 Share on other sites More sharing options...
R31Nismoid Posted June 3, 2009 Share Posted June 3, 2009 track car using china turbos oh the humanity Hope it holds together and doesn't make mince meat out of your motor Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4635229 Share on other sites More sharing options...
BANGN Posted June 3, 2009 Share Posted June 3, 2009 (edited) 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 Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4635244 Share on other sites More sharing options...
youbUTEy Posted June 3, 2009 Author Share Posted June 3, 2009 track car using china turbosoh 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. Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4635263 Share on other sites More sharing options...
R31Nismoid Posted June 3, 2009 Share Posted June 3, 2009 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 Link to comment https://www.sau.com.au/forums/topic/273046-oh-dear/#findComment-4635283 Share on other sites More sharing options...
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