TII Blown Turbo

[Grizzly]

aw thats a bummer chief, sorry to hear it.
your certainly heading in all the right directions, but with most of the impellor blades going walkies there is a fair chance of some internal engine damage
 
but! there is a chance you have got away with it, so it may be worth changing the exhaust to see if it does stop smoking. that unfortunately would require running the engine and if there is damage and debris that will only make things worse!
 
rock and a hard place springs to mind.

I can\'t see how an Impellor would cause damage, its the other way round, the Engine causes damage to the Impellor, Think about it, it won\'t go bvack into the engine from the Turbine side becuase of the pressure invoved (gasses coming out the engine) and it can\'t go in the Comp way because of the Intercooler??

[pdtaylor18]

well damage can be caused by no filter being fitted and also if the bearings are gone then it will touch the walls and damage the blades. Its not always engine that causes damage.  engine will cause exhaust blade damage.
I think.........

[J6KFS]

I can\'t see how an Impellor would cause damage, its the other way round, the Engine causes damage to the Impellor, Think about it, it won\'t go bvack into the engine from the Turbine side becuase of the pressure invoved (gasses coming out the engine) and it can\'t go in the Comp way because of the Intercooler??

yeah the engine can only really cause damage to the exhaust side ie. throws a seal into the blades etc and it all heads down the exhaust, but when a bearing or something fails on the intake side of the turbo on boost, like 250,000 rpm, the impellor that hits the housing turns to very small bits of metal which can get through the IC. and it was the intake side that got the damage.
 
anyhow the exhaust change seems to have cured the problem which is the best outcome me thinks!:chat

[pdtaylor18]

my new turbo 92nd hand )  just waiting for the stainless manifold to do this job properly.

Dump valve is 45mm and will be plumbed into the exhaust rather than just out to atmosphere.
waiting for better weather and a bit more space and then engine will come out to get the pete taylor treatment.  This car is now offically my next project so will create another post soon on the whole thing.

[J6KFS]

wow that exhaust housing is huge!:Laugh  what turbo is that?

[pdtaylor18]

Xspower one that they advertise. Made to be mated specifically for the rotary. Not even sure on the make but at only £120 for the turbo and dump valve then worth it. No shaft play at all. The flipping dump valve is huge,never realised they were so big. If you look on their website they are something like close to £300 to buy new. The exhaust is big but then big is good to harness all that power to drive the compressor.
cant wait now to get the engine out and do the business on it.
I really ought to start a new project thread but i will do that when i actually get to do something. so far i am just collecting.

[Grizzly]

I don\'t want to put your Turbo down but you will proberly find it was originally made for a Diesel truck, i bought a similar Turbo from the US that came with odd size Comp and Exhaust Housings but was a Genuine Garrett Core, after a couple of Thousand miles it started to blow smoke so i kicked off to the people i got it from (who never replied to e-mails) so i took it to MIE Turbo\'s who told me most of the Parts in it where designed for cold work (i.e. Diesels) so they would not withstand the extra heat. The thing that distinguishes the two types of Turbo is the Hot Petrol turbo\'s are nearly always water cooled.

[antnicuk]

although that is a cheaper style turbo,   non water cooled turbos are not all unsuited for hotter burning petrol cars,  T78 an T88, GT35/40\'s are all good turbos that are not water cooled.   My garret GT35/40 had a life for 2 years and is still going strong.  Thats with long spells on track.   The roller bearing turbos are water cooled like the gt35r.

[Grizzly]

I thought all the New bread of Garrett cores where Wet? And arn\'t Greddy Turbo\'s Mitsubishi\'s or some thing like that?? (I admit My Knolage is limited to Garrett as Honeywell is next door to out Wilmslow Branch so i chat to them Pro\'s and con\'s etc

BTW whats this i hear about you and Toyota\'s???

[antnicuk]

i still have a rotary, just no rx7 , i have taken the best bits from an RX7 (engine) and thrown away the plasticy rubbish bit (the car).

A supra just ticks more of the boxes for me at the moment!  Plus you can do this in a stock one!

[pdtaylor18]

Well we\'ll see how the turbo performs and lasts. Been on the XSpower website and its got some good info on this turbo, take your point about water and oil cooler turbos but why use water anyway, surely is just another way of cooling it down, if you have a decent oil cooler then it will lubricate and cool the thing down.  We have aero engines that reach 2000 deg C in the combustion section, output at the exhaust is somewhere near 800 and they are all oil fed bearings, admittedly dam fine roller and thrust bearings.  Of course the oil is cooled by ram air and fuel so it maintains the properties of the oil.  So as long as you have a decent oil cooler setup then doing away with water is something less to go wrong.

[Grizzly]

Well we\'ll see how the turbo performs and lasts. Been on the XSpower website and its got some good info on this turbo, take your point about water and oil cooler turbos but why use water anyway, surely is just another way of cooling it down, if you have a decent oil cooler then it will lubricate and cool the thing down.  We have aero engines that reach 2000 deg C in the combustion section, output at the exhaust is somewhere near 800 and they are all oil fed bearings, admittedly dam fine roller and thrust bearings.  Of course the oil is cooled by ram air and fuel so it maintains the properties of the oil.  So as long as you have a decent oil cooler setup then doing away with water is something less to go wrong.

Its as simple as heat creates wear, lower the heat and you lower the wear.