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The 1.3 Turbo Battle####

Oh also checked the lamda which was out in. still clean so oil and what not must be happy with us.

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SirChris said:
yqyhahe7.jpg
@enuo

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Click to expand...
Forgot to explain this.
Ok, so the first load of results are to calculate the flow rate of oil out of the turbo return feed over the whole rev range. We calculated the time to collect 0.25ml of oil and then calculated flow rate from that. The first set of results were for a 1mm restrictor. We found that the oil pressure is as Noddy said not linear, however I'm guessing there is an oil relief valve near the pump to prevent hydrolocking that might explain that...
Anyway, a 1mm restrictor gave roughly 0.625l/m at 6k rpm, about half what we wanted. I didn't want to go higher though, as there was evidence of cavitation at those revs, possibly because the oil was in the top of the engine/in our collector and not at the oil pickup?
We decided to open the oil restricter up to 1.5mm, measured again at 6k rpm only this time, as 1.5mm has roughly double the cross sectional area as 1mm. We got a calculated flow rate of 0.83l/m this time. Hmm...
Tried once more with a 2mm restrictor at 6k rpm, calculated bang on 1.0l/m flow rate, and cavitation seemed less, so we think air was mixing with the oil as it sloshed down the oil return pipe... case for a swirl pot?
We were happy with 1l/m, as there was no smoke out of the exhaust and it seemed close enough, openening up the restrictor seemed to be giving diminishing returns... and would have just been one step closer to turbo flooding again.
 
Guys can I time this like a na and then just leave the piping off to the tb .. There wouldn't be any boost and I can have some fun... Would the turbo spin to freely?

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like so... Have I done something wrong? I left the filter on the turbo to stop crud. The mesh is still on the tb. Is this okay. My brain thought that the removal of the bubbins allows no boost. Leaving the filter on the turbo helps slow it down.

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But boost still uccured when pushing it. So I thought remove it all. Is that not good for the turbo? Sorry just panicking this end.

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thats fine chris :) you will lose a bit of throttle response because the t/b has to inhale through the (non spinning) compressor wheel, and you will lose a bit of top-end because of the exh mani backpressure
 
Chris dont panic you're fine. It'll try produce a little boost as the wastegate wont allow all exhaust gas out the same rate as normal
 
Has the turbo just been spinning its bollocks off then? Would it damage it? I thought it wouldn't be massively bad for it. The turbo Defo has more play now. Maybe a mm or two one side to the other.

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Maybe because there is less oil jamming it up? Could it be when the engine is pushing more oil through it, it might tighten up?

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the tubby will slacken/free up a bit now its running (the old oil tends to dry out and turn to lacquer when left unused)
 
Hmm okay. So do you reckon k should connect up all the piping but leave the wastegate disconnected like it already is

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frank said:
the tubby will slacken/free up a bit now its running (the old oil tends to dry out and turn to lacquer when left unused)
Click to expand...
Do you reckon that play is anything to worry about when i get it boosting?

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Eurgh o don't like this. Now k have put so much work in to her I am getting really protective of how she is treated. Really worried she will die on the dyno.

Guys with the k11 cg13de engine. Starting from the front of the car. What are the notches on the timing wheel and where do I need to be setting it too? Should I just fully retard it?

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