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Post by greasemonkey on Jan 30, 2014 19:53:25 GMT
movies involved driving and such
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Post by captain chaos on Jan 30, 2014 19:56:15 GMT
We think that a scavenge pump will be needed, especially Saulius is worried because he just had his cars turbo repaired after it had some oil problems, costing eleventy zillion monies.
What kind of pump do we need? Is it ok to use a fuel pump from an old car? Or does it need to be specific for oil? Where can we buy a good scavenge pump?
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Post by greasemonkey on Jan 30, 2014 20:02:35 GMT
they sell scavenge pump everywhere they sell turbo stuff. isn't the turbo high enough? I made a scavenge pump out of a oil pump from a pit-bike, but that's mechanical driven. (and not tested yet)
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Post by katana on Jan 30, 2014 20:34:05 GMT
Can't imagine a fuel pump made to pump watery petrol is going to like thick gooey oil! And as they are cooled by the fluid flow throwing hot oil at it is gonna be torture. I like the mechanical solution - always there, works while engine runs and can handle aerated turbo drain oil flow.
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Post by captain chaos on Feb 28, 2014 10:58:42 GMT
Hi again,
small update. Started the bike yesterday evening, the weather was not too bad so we rode a bit. Everything seems to be ok.
One thing though... after a few minutes of riding up and down the street, the intake side of the turbo had a little bit of oil in it, no smoke from the exhaust though, and no oil in the plenum. The scavenge pump works correctly. We took the oil feed for the turbo from the main oil galery (under the ignition cover) with a restriction, a 125 main jet. Is this too large? Do we need a smaller restriction?
Thanks - CC
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Post by captain chaos on Feb 28, 2014 11:01:57 GMT
Oh yes we bought a small Facet fuel pump as advised by Dave (fastbyme), to work as a scavenge pump. And we made a small tank right under the turbo for catching the oil leaking from it after engine shutdown.
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Post by captain chaos on Mar 2, 2014 15:02:51 GMT
We took the oil feed for the turbo from the main oil galery (under the ignition cover) with a restriction, a 125 main jet. Is this too large? Do we need a smaller restriction? Nobody?
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Post by captain chaos on Mar 30, 2014 17:42:36 GMT
Update again at last. The past few weeks Saulius has been riding a bit, found out the fuel pressure gauge was sh*t so bought a better one, now we were able to adjust the fuel pressure more accurately. It ran much better. Also he made an exhaust, see pics. Looks good and is just quiet enough now not to attract the pigs. Today we went for a ride, and he let me try it of course (he tried my Fatty and was surprised at how comfy and smooth it is). Somehow it pulls but I was a bit disappointed, I expected more. After we came home we found out that it's not getting enough fuel. Saulius removed the tank and saw that the fuel filter was completely blocked, it was new 400km ago. Anyway he installed a new one and we tried the bike. Holy f*ck. It shifts. Wheelies in 3rd gear, it's laying the shit down hard. And that with just under 0,5bar boost. The engine is still stock so we don't want to give too much boost yet. Here are some pics as it is now, more or less finished.
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Post by captain chaos on Mar 30, 2014 18:15:32 GMT
Fatty and Wizzy relaxing together after a nice little ride
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Post by captain chaos on Apr 28, 2014 11:55:49 GMT
Saulius had the bike dyno'ed today. With 0,4atm boost it gives 161 hp at the wheel.
And the A/F is 12:1 everywhere, so we did something right with the carbs.
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Post by pasis on Apr 28, 2014 15:27:01 GMT
Looks cool!
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Post by captain chaos on Oct 13, 2014 8:32:42 GMT
Update time.
So far Saulius has done 4500 km with the turbo. Everything was cool, but the last few hundred km it started to blow from the crankcase brreather, and when accelerating hard even liquid oil came out. One cilinder was a bit down on compression (engine speed uneven when starting the bike). We built the bike with stock engine, if everything would work ok we would invest in engine internals, so it's not a big disaster that it has to come apart now. Before disassembly I checked the valve clearances, everything was as I set them 4500km ago, except no.3 exhaust valves, both are now 0,10-0,12mm. I set them on 0,20mm last spring. The header of no.3 was also getting hotter than the others. Camshafts out (look surprisingly good), head off, and there are some cracks between the intake valve seats and spark plug holes on cil. 2 and 3. Cilinders off, and as expected one piston (no. 3) got a bit hot, and started melting a bit near the intake valve recesses. Top compression ring was stuck (which explains low compression). I'll post some pics later when I get home. Now some questions. What could have caused the cracks around the spark plugs? Can it be fixed or do we need a new head? What do we need to do about the exhaust valves of cil. 3?
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Post by katana on Oct 13, 2014 12:13:55 GMT
All of the GS, GSX and GSXR engines are known for cracking between the plug hole and the inlet seats. As long as the seats aren't actually lose they don't seem to suffer at all. Heat and detonation is the usual culprit for the cracking - quite common when using nitrous! Detonation is a good primary reason for the squashed rings - heat from it is a symptom not necessarily a cause. Are these suzuki pistons? I'd recommend either better fuel / less boost / less ignition - basically anything to control Detonation!
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Post by captain chaos on Oct 13, 2014 13:09:31 GMT
the engine is still stock, that's why we didn't run more than 0,5 bar boost, which already was a bit too much apparently.
The plan is to install Hayabusa pistons and whatever else is needed to make it "boostproof".
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gixxerharry
Velociraptor
Most experts arn't
Posts: 36
Reg: Sept 10, 2014 14:42:58 GMT
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Post by gixxerharry on Oct 15, 2014 9:31:17 GMT
I dont think its to much boost........i think its detonation (pinging) And if the bike is pinging than busa piston wont help Make sure that the engine isnt running lean under boost (cil 3 getting hot so maybe its running lean?) Retard ignition 4 deg (about 4mm slotted holes in the ignition ground plate)
You can fix the head but looking for a other head is a lot cheaper and less work
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