Hi guys been awhile since updates. And a long long road to get this bike going. My final hurdle:
I have a brand new garrett gt2554r and its blowing oil through the seals! I've seen a few prior posts but nothing really helps as yet. I've taken the drain hose off primary and ran it directly to a bucket and it drains at a constant flow (think of a tap that has been slightly turned; enough for continuous flow. I'm running a modified trask plenum which has the catch can built in. Rather then plumbing the vent hose back to the air filter I've slipped on a breather filter. While running I've opened the dip stick and primary seems quite pressurised! I also did a scenario test where I put my finger with slight pressure over the turbo drain while running. This pumped substantial oil past seals. I will also mention turbo oil inlet has a 1mm restrictor in the turbo fitting.
Could it be that the the engine is not breathing enough hence also pressurising the oil in the turbo? I am currently running a base map until I fix this and then straight for final tune. Any help would be appreciated . Can't tell you how frustrating it is to be this close....
Im running same turbo on my bike and as Karzza says you need to reduce amount of oil going into turbo.
Mine has a nitrous injector feeding mine straight into top as my turbo sits level and is positioned so inlet is vertical
[CENTER]2009 Vivid Black SOLD[CENTER]
103 FT LB
Garrett GT25 Ball Bearing Turbo
Custom Built Headers
Custom Built Exhaust
Barnett HD Clutch
SMT Billet Hand Grips,Pegs,Shifter
BPP Belt Guard
Custom Air Brushing on Tank
Custom Tank Badges
Joker Machine controls,mirrors and mini LEDs
Gloss Black Powder Coating on:
Brake and Gear arms
Pulley & Cush Drive
that's a nice finish there, optical ok so to say
I concede with Karzza, you should straighten the turbo alignment.
And as already recommended long time ago, you should increase the diameter of the venting box and it's connections.
The oil supply to the turbo, what diameter has the orifice? You didn't connect that oil supply without orifice, did you?
Thanks a lot for the advice and sorry for such a delayed response. Well I decided to take it upon myself to recreate the manifold and reposition the turbo horizontally. I also tapped a large 18mm internal diameter fitting into the primary case for the new turbo oil drain. Old one was 8mm so no were near right. I decided to run a breather hose from the old tap to relieve some more of the crank pressure as pictured. Problem fixed, no sign of oil in the dumppipe or smoke. buke sounds pretty tame with the silencer on it but you soon hear the blow off valve to remind you what your riding. Bike was dynoed yesterday and made 170hp & 114ft torque @10psi... Was a smooth power curve and the ride home from the dyno place was that good! Taking it on its first big ride this morning so fingers crossed all is finally good.
Oz it's owes me about $5500 complete with computer tune etc.. Would have been cheaper too if they first guy who built some of it didn't dick me around. I ended up making a new manifold myself, new exhaust, various brackets and put a ball bearing turbo on. ( the arsehole put a gtr journal ledger turbo on for me which blew up in 150klm on a base tune) I didn't know any better at the time and trusted the bloke.. Guess if you want something done right you do it yourself. Haha still I guess $5500 is still a few grand cheaper than a trask though.
Done 200k ride yesterday and loved every second. Pulls like a train for as long as you want to hold it. Here's a few more pics. Put a turbo blanket on today as well a s installed a 52mm digital boost gauge where the horn used to be.
Nice work! How is the heat on you? I had to use dymat on my airbox cover, as you could fry an egg on it! Keep riding, and post updates as you go! Thanks, Joe
__________________ TRAVELER: 2006 Roadrod VRSCR, Custom painted Ultrawhite, TTS Supercharger version2.0, TMAX, K&N, Supertrapp V5 exhaust, Pondo Caps, HC Stage II V LED tailight, "A" model bars, Corbin seat, luggage rack, Sumax bags, chrome peg mounts, '08 "D" wheels, polished, rear pulley by Pondo. Slipper clutch. More to come! Old Dyno results: 155 HP 86#TQ COMET: 2009 AW, painted ultrawhite, a work in progress....105.18 HP, 73.98 torque;