Recent content by mswans

  1. M

    turbocharged cb550 bobber

    91 no ethanol is the best pump gas we get around here, and it's even hard to find at times. So 91 it is. I do still need to wean down the main jet a few sizes, I'm running plenty rich at the moment.
  2. M

    turbocharged cb550 bobber

    Alright, just did my best to measure the base gasket thickness and calculate a compression ratio. I came up with a 7.6:1 compression ratio. Sounds to me like 14psi is just what this engine needs!
  3. M

    turbocharged cb550 bobber

    current plan is to let it be and use my wrist as the boost controller. I have not come up with a clean way to get a wastegate working on it. I haven't calculated the compression ratio, but am pretty curious with what it is. Stock is 9:1. I have stock pistons and a head with doubled base gaskets...
  4. M

    turbocharged cb550 bobber

    Well after I had the bike out the first time a month or two back, I ran into some cylinder head troubles due to wrenching under the influence. After enjoying several adult beverages I decided it was a good time to re-torque the cylinder head. Long story short, I managed to misalign the tappets...
  5. M

    turbocharged cb550 bobber

    Throttle response is not bad at all. Theres a bit of hesitation just above idle, but after that its a screamer. And no carbon seals, just the regular piston ring type.
  6. M

    turbocharged cb550 bobber

    Thats something to consider, I could check the gauge against another air pressure gauge. Its a brand new sun pro. I didn't see any of the crazy boost until the tach was way up above 10k. May have even seen 12k a couple times, makes me question the accuracy of the tach. Hard to say exactly...
  7. M

    turbocharged cb550 bobber

    Made a fairly successful maiden voyage. Put 22 miles on it. Scary power for the size of this bike. Saw boost get up around 13-14 psi a few times, thats a lot more than I wanted but it looks like the motor took it fairly well. It is leaking oil around the MLS head gasket pretty good. Hoping that...
  8. M

    turbocharged cb550 bobber

    Oh, and heres a quick startup and walk around video https://youtu.be/PjzNfLJRUfM
  9. M

    turbocharged cb550 bobber

    Well i made a little winter progress on the bike. Aluminum plenum intake is what i should have done off the get go. Bike starts and idles well. think I've got the pilot circuit close to fine tuned on this 38mm cv carb. Waiting on warmer weather to see how the main jet does down the highway. Just...
  10. M

    turbocharged cb550 bobber

    Yes, the current plan is to see how this thing performs on it. its a 38mm cv carb with an accelerator pump from a harley
  11. M

    turbocharged cb550 bobber

    Slow progress is still progress right? I ended up struggling with my steel intake manifold quite a bit. Wouldn't seal up to the head that well, and there were quite a few vacuum leaks in the welds that I was having trouble sealing up. Now we're gonna try this aluminum plenum style intake...
  12. M

    turbocharged cb550 bobber

    hey thanks, Im loving the look of the front but havent decided if I love the rear. does it look super narrow to anyone else? its a 4.10-18 on the stock rim. And to be honest, no I'm not worried about road comfort much. Ive got a modern bagger for the trips with any length. Zero experience...
  13. M

    turbocharged cb550 bobber

    Well, who all here likes dual sport tires? Am I going to love these or regret them? At first I thought the rear tire looked a little on the narrow side, but other than that I'm liking the looks. If this bike can decently navigate some gravel roads in moderation, I'll be making use of it for...
  14. M

    turbocharged cb550 bobber

    Don't want this to turn into an argument, but I'm still not seeing the danger. Won't my plate frame with rounded corners eliminate any possibility of a cut from the sharp edges (that were all removed after the picture)? Doesn't seem to be near my leg when I'm in riding position or when I have my...
  15. M

    turbocharged cb550 bobber

    Are you just worried about nailing it while walking around the bike or mounting/dismounting? Sharp edges were smoothed up before it was painted. This pic was a just test fit. A simple license plate frame has also been ordered.
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