busakiller
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I am not checking anything. They're checking every thing over again. I fixed a bunch of leaks and hoses.
Gen 2 stage 1 turbo bike
- Thread starter busakiller
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busakiller
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Well bike is done and ready for pick up. Made 230ish on 4 psi and made 270 280 on 8 psi. He said the waste gate was fine for a awhile but the other day when he had it on the dyno it jumped up to 8 psi. So tuned it from 4 to 8 psi and said clean the waste gate or buy and better gate. So I am going to finally order and new wastegate. Trying to decide what brand to get. They did find and bad wire connection going ro the fuel pump and that's why it was going lean on them. So that's another thing I have to do is look over all the wiring on the bike. So much for this bike being turn key turbo bike when I bought it.
8PSI on a stock compression gen 2... you may have an excuse to pull the engine sooner then later.
How does the bike go from 4 pounds to 8 pounds? Even if something crazy like that happened, it is inexcusable that the issue was not found and fixed . . . IMHO.
Rocketmn
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Frank, think of it as Job Security...
busakiller
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The bike has a china waste gate in it. He said when he tuned it the bike was making 4.5 psi. Said he took it for a test drive aND notice it was making more boost. So he put it on the dyno and it made 4.5 psi a couple of pulls the he said it jumped up too 8 psi on one pull. Idk. Just repaying what he said.
busakiller
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The engine does have a valve springs, head studs and thicker head gasket.
busakiller
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Cause some people are just stupid cheap. I bought this bike turbod. It was suppose to be turn key bike. I bought a new waste gate last night for it. Brand new tial 44mm wastegate. Now I just have to redo the dump pipe so it works and time to ride.
What size gate is on it now?
busakiller
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It had a cheap china 44mm waste gate on it. Replacing it with a new tial 44mm wastegate.
A 44mm gate on a small turbo low boost set up could be your problem as well. There is such thing as too much gate.
busakiller
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At this moment in time I am just going to run it for now. As I do plan on building the motor and going to a bigger turbo.
busakiller
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Here's the final dyno print out
The afr read out looked a little weird to me. I squared up the picture then drew a straight line... that’s showing me it’s a mid 12 afr... this guy ever tune a turbo bike before? One that’s lasted anyways?
Hey Rob - nothing wrong with tuning into the mid 12s on boost . . . odds are, he'll get a few good runs out of it! Among other things, might break a record as well - 
busakiller
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He has built a couple of turbo bikes. He also has also a pro street bike too. He's the only guy close that can tune anything.
The ability to tune is contingent upon several factors . . . initial training, experience, KNOWLEDGE, and equipment that is calibrated and up to date. Basics don't cut it, especially in the high performance world. From what I can see, your tune is wrong and the torque being low is a red flag . . .
I see what you did there Frank... haha!
You’re right on the tq, it is on the low side, and power is a bit high for the boost numbers. Lean is mean to an extent some say, but gotta have fuel to make tq.
busakiller
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Well got a new wastegate on the bike and going to have him check the tune slash retune it with me there. The new waste gate works and doesn't move around on boost pressure. Going to have him richen the tune up.
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