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Search results

  1. A

    GS(X)1100E turbo EFI

    Next step will be building the exhaust. All the parts are already collected. DIY stainless silencer kit for 2.5" pipe, water cut downpipe flange and pile of stainless pipes, straight and bent. Should be enough for one exhaust...
  2. A

    GS(X)1100E turbo EFI

    Then some head work. I smoothed all sharp edges from the combustion chambers and opened them up slightly. On the left result after raw shaping and stock one on the right. I hope that smoothing around valve seats should improve flow as well. After shaping I checked chamber volumes and...
  3. A

    GS(X)1100E turbo EFI

    After that the package fits nicely on the head. And on the bike as well. After this I have to extend the fuel rail, replace those nuts and washers with proper spacers and plug holes of the secondary throttle shafts. Most of this is already done.
  4. A

    GS(X)1100E turbo EFI

    Time for update though I haven't got much done. Or actually I have done plenty of all kind background work, planning, gathering parts and so on but all this hasn't gained much visible progress to show. But let's see those few visible steps. Fitting the throttle bodies. First disassemble the...
  5. A

    Katana wheel swap - WTH?

    If I remember correctly I used some 5-6mm spacer behind the front sprocket to offset it outwards AND shaved off another 6mm from the rear sprocket carrier. Then I was able to get get the wheel centred and chain line straight. So this was my -83 GS1100 and wheel form GSX600F / Katana.
  6. A

    oil pressure drop @ hard throttle

    All right, here are few pictures: http://www.iki.fi/arttuh/mopo/project/pohja1.jpg http://www.iki.fi/arttuh/mopo/project/pohja2.jpg http://www.iki.fi/arttuh/mopo/project/pickup.jpg And yes, I know, that square pick-up pipe doesn't look very professional :D But it works and I hadn't suitable...
  7. A

    oil pressure drop @ hard throttle

    Not with a gauge but I was using 0.3 bar (4.5 psi) pressure switch instead of original oil light switch. So I'm sure that there was real pressure drop. On the other hand I think that short pressure drops aren't that dangerous for the engine, like trippivot said. But I was using a plain bearing...
  8. A

    oil pressure drop @ hard throttle

    This oil light flicker sound familiar. It happened also for me when I installed the 750 pump gears along the turbo. The light started to flicker at top end rpm after hard acceleration. Especially if the oil wasn't completely warm. I think it's combination of two things: 1) increased oil flow...
  9. A

    starter clutch bolts and starter install

    Use 12.9 hardness bolts and hard thread lock (red Locktite or something similar). If the tapers on the crank and generator wheel looks pitted/worn you can seat them by using grinding paste. I think it's better to not use Locktite on the taper. It will get soft in engine heat and make contact worse.
  10. A

    Gs1150 Lock up clutch

    My turbo GS1100 has about 150hp on the wheel and stock clutch with stiffer springs held that fine. Just make sure that everything is on perfect condition. Fresh fiber disks, check that steels are flat and maybe get them bead blasted, everything moves smoothly and so on. Later I installed a...
  11. A

    GS(X)1100E turbo EFI

    Here is that log snapshot from a dyno pull: MAP = Manifold Air Pressure (kPa) MAT = Manifold Air Temperature (Deg. C) TP = Throttle Position (%)
  12. A

    GS(X)1100E turbo EFI

    Thanks for your kind comments Katman! Current engine has high impedance injectors and probably I will use high impedance ones with the new engine as well. The plan is to use the GSX-R injectors (about 250cc/min) as primary injectors and add another set of 500-600cc injectors as secondary...
  13. A

    GS(X)1100E turbo EFI

    Yes, proper turbo pistons would be the best choice. Especially moving down the top ring would be useful since the most common piston failure seems to be broken ring land. On the other hand that's quite lot of money so I have to consider it carefully since this engine build will cost huge pile of...
  14. A

    GS(X)1100E turbo EFI

    I'm not completely sure about the pistons yet. One option is to machine shallow dishes on the piston tops, open up the combustion chambers a bit and maybe add slightly thicker base gasket. I have to do some further measurements to see if it's possible to get 9:1 compression ratio this way while...
  15. A

    GS(X)1100E turbo EFI

    Yes, the trigger system is completely my own work. It uses two hall sensors and tiny magnets as triggers. Send me a pm if you like to get more detailed information. The Mallory pump should be good up to 350 hp so I will use it. It's quite smart unit, provides good amount of flow with...
  16. A

    GS(X)1100E turbo EFI

    So let's start the practical implementation that may be a bit more complicated than the short plan. The first step. Dig out an 1150 engine from corner of the garage. Then some other parts that I have already collected. -IHI VF34 ball bearing turbo that should be good up to 350hp power...
  17. A

    GS(X)1100E turbo EFI

    All right then, let's start building a new engine. The goal is to get 250-300hp with nice smooth power output that is suitable for street riding. And since this is a street bike that will see plenty of road reliability should be as good as possible. Of course power and reliability are somewhat...
  18. A

    GS(X)1100E turbo EFI

    A small clarification: It was the transmission output shaft bearing (behind the front sprocket) that broke. The turbo is still fine. Yes, power figure was pretty low. I think that's mainly due the compressor of the turbo. Based on information that I have found it's limit is around 175hp at...
  19. A

    GS(X)1100E turbo EFI

    All right, time for summary of this riding season. After some work I managed to get the VNT and fuel tuning to pretty good state. This work was finished on a dyno of my friend. We spent a good part of a day by testing all kind different things. Though power figures were slightly disappointing...
  20. A

    GS(X)1100E turbo EFI

    Hmm, I meant that the relay must be able to carry at least 10A. So typical automotive 30A relay is just fine. I fitted the relay on the board just because I wanted to save space and external wiring.
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