Read from the bottem up
Hi Tom
Ok the turbos each side of the engine feed only 3cyl per side on a sepret plenum chamber Linked with a 1” balance bar if one tub starts to play up the boost demand is still there
But at the link bar will not flow the amount needed it will make the engine Run lean or Boost way to much on the side that is working correctly but then Over working to provide the Lack of been
“on a twin turbo, if one goes down, the other one will speed up to compensate for the drop in pressure. They're linked through a boost controller that will just keep both actuators closed until it sees the right pressure. When you have one turbo speed up you end up with a plenum at very high boost as is expected when you have two plenums fed independently by two seperate turbos”
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Hi Mark,
I am not sure I understand the last part of your email, but the if this valve is catching on the valve seat, heat and expansion will not cause it to seize shut, it will only increase the problem of it seizing open. If it is seizing shut, it is not due to the valve catching.
Regards,
Tom Russell
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Hi Tom
In the video only shows the tub sticking open but when it was bolted to the engine and i tested it in front of my Tech guy it jammed shut a few times
Lets say when car/turbo is hot that it gets worse and does Jam shut/open more think u will find its the route of the Problem just happend
Will let u know soon as there Packed ready to go
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Hi Mark,
I certainly agree there is a fault with the turbocharger, this is clear in your video. This of course will be sorted under warranty assuming our initial diagnosis is correct.
I understand what you are saying about the failed engine bank being on the same side as the faulty turbo, but assuming the valve is seizing open its physically impossible for excessive boost pressure to be delivered to that side of the engine.
Let me know which day you would like me to arrange the courier for and I will make sure it is done.
Regards,
Tom Russell
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Hi Tom
Yes once i find a box for them i can get them packed as arranged.. remember one turbo works one half of the engine and other tub other half
This turbo at fault as the same side of the engine has failed on
The turbo is at fault and it needs sorting out
Mark
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Hi Mark,
Judging by the video it appears to be seizing after full extension, when pressure is released and the valve tries to close. This can occur (although it’s very uncommon) when the poppet valve has too much “play” and when fully extended, then released, the valve picks up on the valve seat, causing the valve to stick open – the video you have attached appears to show this as the problem (we can confirm for sure once the turbos are back). This can be rectified by modifying the valve/mechanism to remove this excess movement – it’s a simple procedure.
This problem, as per your video, only occurs when closing the wastegate, thus seizing the mechanism open. In your video it doesn’t appear to seize shut at any point (if the valve is catching on the valve seat, it cannot seize shut). This would have the opposite effect to that you have described as the engine failure. The only impact this would have on the engine would be a lack of boost pressure as the wastegate is open – this could not possibly result in such an engine failure.
Would you like me to arrange a courier to come and collect the turbochargers? We can then confirm the fault with the turbocharger and proceed accordingly.
Kind regards,
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trying to riddle out of it if u ask me ....
