Low power at 15psi. With dyno graph

[RedBull]

V8 Busa Motor | General Bike Related Topics

Goal: Design a v8 using Busa parts similar to a Hartley, synergy or RPE V8 Should use as many stock parts as necessary maintain characteristics of a stock busa but with twice the power crankcase and crankshaft must be machinable on a 4 axis mill There is so much to do on this project that I...

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[HighCaliberJordan]

Got some insight to her death today. Now it is a question of going with Wossner pistons in 81mm or step up the bore since the cylinder is scored.

 

[GIXERHP]

Got some insight to her death today. Now it is a question of going with Wossner pistons in 81mm or step up the bore since the cylinder is scored.
View attachment 1647839

When you step up the bore size, you sacrifice head gasket material, I personally would get an other cylinder, Gen 2's are cheap

 

[busakiller]

Bore it out and try again. You will be fine boring it out. It’s been done multiple times. Some of the pro street guys run 3mm over bore. Doing a 1mm over bore ain’t going to cause you problems. But if you looking for cylinder I have a stock pile of cylinders and gen 1 motor parts

 

[shade]

If its turbo leave the bore size alone. Build it to boost the piss out of it.

 

[Bigboy Busa2]

Bore it out and try again. You will be fine boring it out. It’s been done multiple times. Some of the pro street guys run 3mm over bore. Doing a 1mm over bore ain’t going to cause you problems. But if you looking for cylinder I have a stock pile of cylinders and gen 1 motor parts

Looking for a gen 1 transmission. Specifically gear 3-4 on input shaft. Thanks

 

[busakiller]

Looking for a gen 1 transmission. Specifically gear 3-4 on input shaft. Thanks

Send me a dm. I might have what you need. Might need a new input shaft.

 

[Bigboy Busa2]

Send me a dm. I might have what you need. Might need a new input shaft.

getting a billet output shaft. I dont know if this will work as the other gears are already cut, not sure if it can be matched or if the angle is universal.$900 for pro cut at Robinson without core + $330 for shaft. Maybe go that route. Thanks

 

[michael parris heuberger]

View attachment 1648149getting a billet output shaft. I dont know if this will work as the other gears are already cut, not sure if it can be matched or if the angle is universal.$900 for pro cut at Robinson without core + $330 for shaft. Maybe go that route. Thanks

Hi. He did my trans very good guy. He made me some special parts too. I have his out side bearing support plate he made me some 7075 aluminum nuts and a Ti clutch pusher.

 

[busakiller]

View attachment 1648149getting a billet output shaft. I dont know if this will work as the other gears are already cut, not sure if it can be matched or if the angle is universal.$900 for pro cut at Robinson without core + $330 for shaft. Maybe go that route. Thanks

I have a transmission but the input shaft is broken.

 

[Bigboy Busa2]

I have a transmission but the input shaft is broken.

Let me know if your interested in getting rid of it. Thanks. I dont have to have it now but would like the parts for future. Thanks

 

[RedBull]

boost | Turbo

I had a slight problem wiith my busa tonight. Blew a boost line off so I had to tear it down and fix it. Thought I would give her a bath without the fairings. Here are a few pics. Will post more later of the completely assembled bike.

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[HighCaliberJordan]

Well, not sure what happened. There is detonation all over the cylinders. The combustion chamber looks like a mouse ate the metal between the valves and the #2 piston melted on the side.

I have no idea what would make this happen. E-85- forged pistons, proper fuel supply system and injectors that can handle the fuel needs. I drove it to the tuner and got it back blown up. I can point fingers all day long but in the end, he is not going to do anything. Hard to prove he caused the failure.

I ordered a drysump, new cylinder and head, adjustable cam gears, replacement piston, and some new toys like air shifters, bigger brakes, new suspension….

I am nervous to put this thing back together and the same thing happen. It was confirmed by the guys at MPS that with the spacer gasket, the JE pistons will yield 9:1 compression. If it was not the spacer drastically lowering the compression below 9:1 and the cam gears would still be fine in stock position with the base spacer, what the hell caused the low power?

Any insight would be greatly appreciated.

 

[202mphbusa]

I don't care what ANYONE says
Put a freaking degree wheel on it and double check cam timing

Motor was probably hurt while tuning
so it never had a chance to make power

 

[RedBull]

ignition timing | All Motor

Does anyone have experience with gen2 ignition timing advance? Older posts suggest that hayabusas dont like extra timing advance. My setup is 1397ccm gen1 with gen2 ecu, 12.8 CR, full exhaust system, stock head, stock intake cam, gen3 ex cam, 100 octane RON fuel On my last dyno run, I added 1,2...

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