Project; Whizzy Pop Slingshot

[Danm54]

It it carbon sealed yes. 

There was a discussion on whether it was needed because of the vacuum created when the tb is shut or because you had fuel going through the turbo. Or maybe both.

Can't remember the outcome but it was carbon sealed when I bought it anyway.

[Pheasantplucker]

So, If the TB was mounted between the turbo and injection manifold you wouldn't need a carbon sealed turbo?

Is that right? There wouldn't be any vacuum applied to the turbo by the motor when the TB is closed?

Sorry for all the questions Im trying to get as much info as I can for a future project!

 

[Danm54]

Correct. But you would need a bov after the turbo and before the tb.

[busa ash]

Good too see you back at it dan 

 

 

[Danm54]

Cheers Ash, can't say I've been doing anything to the bike lately as I've not seen it for months!

Just patiently waiting for some news of how its running.

[Danm54]

Got an e-mail from John the other day, bike is (still) at Specialist Components for base calibrations. Once they're done and its running its back to John for tuning. 

No idea why this is taking so long...

[Danm54]

Bit of an update, John has got it running nicely, to a point...

Last week during mapping it started leaking oil from the hose feeding the turbo at 3-4k rpm so that was sorted and mapping continued this week. 

 

Next hold up is that oil is leaking out the exhaust. Not just blue smokey oil, it's literally dripping out the exhaust.

 

As it stands its mapped up to 5k and its running real nice, idles smooth with good throttle response, picks up good etc. Just pisses oil out.

 

So its back to wsr where they'll check it over, pull the turbo out, send it off for a rebuild or whatever is needed.

 

Its getting closer....

[Leblowski]

Sounds promising

are you shure the oil isnt a drainline problem ?

[Danm54]

Its a -10 drain into the clutch cover so its big enough, the feed is supplied through a 1mm restrictor so its not getting too much oil.

 

I did wonder if it was excessive crank case pressure but its leaking a lot of oil for that.

[slingy1157]

Shit fella, I thought I was the only one with such shit problems. Keep at it, your so close now. Mines filled the exhaust with oil that many times now I am a bit paranoid about it lol

[slingy1157]

One thing I have learnt is its rarely the turbo itself causing these issues. They are a pretty basic device really. 

With the drain, where in relation to the clutch basket is it? Could the clutch be throwing oil up the drain and thus slowing the drain rate?  This effect would probably get worse with revs too. Or even if the clutch basket was very close to the drain point inside the motor, there might be a windage component as well

[slingy1157]

I would be cleaning up all the oil really well then do some testing with the drain just into a jug and see how much oil is flowing at different revs and if it passes any oil into the exhaust housing while doing these tests for a start before jumping into rebuilds etc.

[Danm54]

Id guess wsr will check that before pulling the turbo out. It is leaking even on tickover though.

I bought it off a member on here a few years back and it hadn't long been rebuilt and had a carbon seal so it should be ok, unless its been damaged from being around the shed all that time.

 

Trouble is the bike is a good 3 hours drive away so its not worth me bringing it home to spend a couple of hours looking over it, even going up there for a few hours is a full day plus fuel.

 

I'll see if I can upload the vid John sent me.

Edited December 3, 2015 by Danm54

[Danm54]

That uploaded quick!

[Leblowski]

Indeed just get it to drain in a bucket then you know it's the turbo, ffcourse it could be a bad rebuild also.

Thanks for putting up the vid I have been waiting for this moment a long time just as you I so wanted to know if your set up still sounded like a proper old draw through 

And it does very nice

[slingy1157]

Alot of oil can linger in the snail, or even drain back down from the turbo coating the inside of the up pipe and pooling  in the collector, this being the lowest point of the exhaust. So one event of oil passing the seals can have on going simptons. The only way to trouble shoot is unfortunately to strip all the exhaust off ,clean, re assemble and test again. Very tedious indeed lol

[Gixer1460]

Alot of oil can linger in the snail, or even drain back down from the turbo coating the inside of the up pipe and pooling  in the collector, this being the lowest point of the exhaust. So one event of oil passing the seals can have on going simptons. The only way to trouble shoot is unfortunately to strip all the exhaust off ,clean, re assemble and test again. Very tedious indeed lol

Don't agree with pooling in the up pipe! That is the hottest point (around the collector) and any oil would be burnt off and the thing would be smoking like a Steam Engine! I'd say, looking at the clean oil, its turbo seal related - either fubar'd or badly fitted? You said you are  using a dash 10 drain - is it horizontal anywhere or vertical drop throughout? Its possibly backing up in the pipe and overwhelming the seal?

[Danm54]

It's more horizontal than vertical but its got a decent fall all the way.

I flow tested the feed on my standard gsxr and its flowing about 2 litres a minute at 6-7k I think. The drain should take that, unless there's something else at play as well.

 

Pic of the drain, thats quite a short pipe too.

Edited December 4, 2015 by Danm54

[FJD]

engine vent to small ?

Is there any vent at all - i don´t see one in the pic.

maybe too much back-pressure inside engine cases causes problems with oil flow.

[Danm54]

Its only got the standard one on the cam cover at the minute, it does need another on the clutch cover but I'm unsure whether that would cause so much oil to come out the exhaust.

 

Yokes are done though!

 

 

[Gixer1460]

Think of it this way - you are trying to drain oil by gravity into a pressurised tank (the crankcase) without adequate breathers! Turbo's need breathers and as many as you can fit / as big as you can manage. I didn't consider 2x dash 10's and 2x dash 8's to be excessive!

[vizman]

you need to let them cases breath dude, that oil is going to find the easiest way out of the turbo.

[Leblowski]

I always enlarge the breather on the cover and   Make and extra in the clutchcover.

so you might want to try that first before spending money 

you can check easily by removing the oilfiller plug and push in a big long hose there to prevent it from spitting oil while idling

Edited December 11, 2015 by Leblowski

[Danm54]

Yea I may have overlooked how important the extra breathers are, makes sense really especially with a fresh motor where I'll probably be getting a bit of blow by on the rings.

 

Looks like I'll be bringing it home this weekend anyway, need to get some finished pics for the insurance.

I'll pull the turbo etc and give it a clean out and check over then try it with the filler cap removed.

 

Whats the opinions on catch tanks?

Worth making one with a drain to the cases or just run hose and filters behind the fairing?

[Gixer1460]

Personally I ran a catch tank ( but was racing as well so better to have a recirc catch tank and not oil the track after forgetting to empty the can!) This is based on the fact that a tank will need the same amount of vents as are run to it..................i've seen tanks with 3x lines in and only 1x 12mm K&N to vent - it just don't work!