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Search results

  1. A

    GS(X)1100E turbo EFI

    Yes, I used the GPZ pump in first EFI setup. The pump was fed from a relay built in the Megasquirt box (my own circuit board version). Anyway, any general purpose automotive relay should work fine. There isn't any special requirements for the pump relay except current capacity (>10A).
  2. A

    GS(X)1100E turbo EFI

    There is no need for a check valve on the return line. There shouldn't be any back flow since the pump is pushing fuel always to the tank. Basically there are two important requirements for the fuel return: -return point should be far enough from pump intake line inlet to prevent heated fuel...
  3. A

    GS(X)1100E turbo EFI

    The flange is home made. Actually I got it along some other engine parts that I bought. Anyways, it's very simple piece of hardware. Just a flat piece of iron with two tubes going through it. And I think that return line doesn't actually need that long extension. As long as it doesn't exit right...
  4. A

    GS(X)1100E turbo EFI

    Original wheels can be seen on this picture. Current wheels are off from GSX-R1100 '91-'93.
  5. A

    GS(X)1100E turbo EFI

    I have replaced the fuel tap with a flange with two outlets. The return line has extension pipe inside the tank so the returning fuel exits at top of the tank.
  6. A

    GS(X)1100E turbo EFI

    Yes, my friend's bike. GPZ750 with home made turbo kit, bored to 810cc and also with Megasquirt engine management.
  7. A

    GS(X)1100E turbo EFI

    Done plenty of VNT tuning. Now it begins to be drivable but transition to boost isn't yet as smooth as it could be. So some more tuning in order. Last Friday I did my first drag racing attempt. Results weren't anything too special but it was great fun. My best ET after several passes was about...
  8. A

    GS(X)1100E turbo EFI

    No, the holes are just on the back side of the plate. The idea is to force air go around one more corner before entering throttle body inlets. So air enters to the plenum at lower front corner. At first it gets to a small tunnel formed of that L-shape plate and lower corner of the main plenum...
  9. A

    GS(X)1100E turbo EFI

    Progress has been slow but finally it's back on the road. Assembling the top end went fine except one snapped cam cap bolt. Just plenty of tedious tinkering like checking ring end gaps, squeezing the pistons to the cylinders, timing the cams and so on. Because the combustion chambers were...
  10. A

    carb to fuel injection Builders Log

    Yep, I would prefer Microsquirt over standard MS2 box. The most significant benefits are smaller size, sealed case and connector, two VR sensor inputs for crank sensors and two coil drivers. So with it you can make full injection and ignition control for four cylinder engine without any...
  11. A

    carb to fuel injection Builders Log

    Yes and no :D I have built few units for my friends but I don't produce and sell them in large scale. So if you really want one we can discuss about it ;) Sorry, no idea about the 550 stator. For comparison my 1100 outputs 250W and it's enough for all standard lights, a pump that draws about...
  12. A

    carb to fuel injection Builders Log

    Thanks! The box is my own design. Actually there are two versions of them in the pictures. Older one in aluminium colored box contains just basic Megasquirt functionality. Later one seen on the turbo page (black box) has all kind additional features supported by extra-code. Like two ignition...
  13. A

    carb to fuel injection Builders Log

    Good luck for your project! Looking good by this far. The throttle bodies could be off from a CBR900 954, maybe. I also guess that they might be slightly large for your engine but you never know before trying :) One thing to keep in mind is current consumption. Output of the generator isn't...
  14. A

    GS(X)1100E turbo EFI

    Difference in volume is small but it makes 0.2-0.3 difference in compression ratio. Not very dramatic though but if the engine is running on the edge of detonation it matters. Yep, it should be interesting :D I'm planning for 1bar / 15psi maximum boost or maybe slightly more. I got the turbo...
  15. A

    GS(X)1100E turbo EFI

    Difference in chamber volumes wasn't very big, 24cc vs. 25cc. Current plenum shape isn't very optimal but I thought that large volume would compensate it. But maybe that isn't enough. Plans for "Stage 2" include: 1150 engine as basis, 1230cc pistons, straight cut primary gears, IHI VF34 ball...
  16. A

    GS(X)1100E turbo EFI

    Hi, I'm also leaning towards foreign object damage. The dents are so sharp that it's unlikely that they are from detonation. I guess that one reason for hotter inner cylinders has been smaller combustion chambers and thus higher compression. This should be fixed now. Another possibility is...
  17. A

    GS(X)1100E turbo EFI

    I measured the combustion chambers and found out that inner ones were slightly smaller than others. So I opened them up a bit to get the volumes equal. Cleaned the exhaust ports and at the same time also tried to make them slightly smoother and more flowing. Hope that I didn't ruin the...
  18. A

    GS(X)1100E turbo EFI

    While cleaning the carbon deposits I found "interesting" dents on one piston top and combustion chamber. I'm not sure if these are signs of detonation or if there has been some "foreign object" passing through. Opinions? Ultrasonic cleaner did the trick for the pistons. Even the ring grooves...
  19. A

    GS(X)1100E turbo EFI

    All right, here we go again! The bike has been neglected almost the whole winter since I have been busy with finishing my new garage. Finally got it ready enough to move the bike and tools in. So it's time for late winter overhaul. So the plan is to make just quick and cheap renovation for the...
  20. A

    fuel injection mod? 1980 GS850GL

    Hi, Some random hints and thoughts: -Megasquirt is a good choice, works just fine with bike engines. -If spacing of the carbs on your bike is the same than on GS1100 then throttle bodies off from old Kawa GPZ1100 is probably the easiest solution for throttle bodies, injectors etc. A plenum with...
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