Just spoken to turbo solutions and they have said that my original turbo and the recon turbo have gone due to it over spinning (both within 5days....... Can anyone please elaborate on this? Please

Whats car boosting to?

Not a clue, it's had a revo map, and has been fine, but he said I has a faulty boost controller so iv replaced that when the turbo has gone and now it's doing this

Turbo is trying to produce too much boost and "overspins" past its design limit. Causes are remap is asking turbo to make more boost than the turbo is capable of, boost leak so turbo tries to produce more boost to keep up with the ECU's request for boost, de-restricted air inlet, and as above. Do you have a boost gauge fitted to keep an eye on the boost?

Over spinning is over speeding the turbo, this commonly happens when, for example if there is a boost leak on the car the turbo will try to over compensate for the lack of pressure causing it to over speed. This could be also down to mapping and many other different faults. I would recommend getting the car booked in to a workshop to have it properly diagnosed otherwise you may find yourself changing turbos left and and centre.

A boost gauge will not tell you if the turbo is over spinning, only what pressure there is in the system. To properly keep an eye on the speed of the turbo you can get a gauge that meters such a thing.

AwesomeMike

When I had a boost leak due to a faulty silicone hose on my hybrid turbo the limp mode repeatedly cut in to save any damage to the over spinning turbo? Don't all ECU's do this even after re mapping ?

No, that again does not meter the speed of the turbo. That only meters the amount of boost pressure!

Yours would have been a big enough leak so that the turbo even over speeding cannot make enough pressure and going in to limp, for the odd boost leak that is very small the turbo can over speed to make the boost pressure in the allowed values, which then wouldn't go in to limp.

Some tuners also really make that 'allowed' limit way too much removing this safty aspect too :(

AwesomeMike

When I had a boost leak due to a faulty silicone hose on my hybrid turbo the limp mode repeatedly cut in to save any damage to the over spinning turbo? Don't all ECU's do this even after re mapping ?

Depends on what the map have the limit set to.

I've heard of some poor maps where the limp mode boost value was set so high that it would basically only go into limp mode if you drove your car on Venus.

It was a generic revo map?

Running a decat on the car when it hasn't been mapped with the decat, fitting one after if you like can also make the turbo "overspin" I'm sure I read it on here somewhere.

Was the oil feed pipe replaced with the 1st turbo?

The only turbo speed sensor I know of is a garratt one. This involves drilling a hole in the compressor housing so the sensors can detect the blades.

Is their any other type? I'd be really interested if their is

When the next one is fitted I'd be carrying out some boost logs to see if anything is shown. But like said about this only measures pressure in the pipes so best removing all pipe and have them pressure tested to rule out leaks.

Running a decat on the car when it hasn't been mapped with the decat, fitting one after if you like can also make the turbo "overspin" I'm sure I read it on here somewhere.

It will cause over boost yes. This will be shown by logging group 11 in vcds.

Did you replace the vacuum box on the top of the strut with a brand new one or 2nd hand one?

Did you replace the vacuum box on the top of the strut with a brand new one or 2nd hand one?

Brand new one, I thought mine was faulty so tried a mates one... Went down the duel and it popped, then biught a new one to go with new turbo and it was sluggish and plumes of black smoke coming out of the back, then pop??

Black smoke means unburnt fuel. If the turbo doesn't boost then the MAF reading is low which limits fuel.

So it its still injecting fuel then the ecu must still be getting good readings through the MAF. But then it not burning the fuel so where's the air going?

Check all the pipework.

Black smoke means unburnt fuel. If the turbo doesn't boost then the MAF reading is low which limits fuel.

So it its still injecting fuel then the ecu must still be getting good readings through the MAF. But then it not burning the fuel so where's the air going?

Check all the pipework.

Ok will do. Thanks