CBR 929 Engine Mod..
#1
10-23-2010, 01:44 AM
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CBR 929 Engine Mod..
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10-29-2010, 04:15 PM
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I would get some beat up cams from each motor and start measuring. Also look up the lift and duration of each. They are going to be optimized by Honda to work best with their original motors, if you want cams to improve power over stock then you need higher lift and longer duration (or shorter depending on goals). You won't get more than 2-4hp without a Power Commander, and maybe 5-10hp with a PC. What else have you done that makes you want different cams?
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10-29-2010, 05:21 PM
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10-31-2010, 02:10 AM
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I would get some beat up cams from each motor and start measuring. Also look up the lift and duration of each. They are going to be optimized by Honda to work best with their original motors, if you want cams to improve power over stock then you need higher lift and longer duration (or shorter depending on goals). You won't get more than 2-4hp without a Power Commander, and maybe 5-10hp with a PC. What else have you done that makes you want different cams?
Thanks for replying info. Yes, I already have PCIII on my CBR929, but still thinking to work ECU and into stator(lighter rotor) or Hight cam cranshift and polish the intake and out....I wanna do CBR929 with 200HP, will it be possible?
Last edited by Hung88; 10-31-2010 at 02:14 AM.
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10-31-2010, 02:13 AM
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HI John
Thanks for reply....I was thinking to use nitrous system, but it need very good quality forged pistons and good well maintain, otherwise the engine will below up soon, so i think to the other way to make the engine better and endurability...
#7
11-01-2010, 01:03 AM
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Anything is possible with $$. You should go turbo. With a nice rpm based boost controller it will bring the power in smooth and predictably, plus you don't need to get refills to use it. Or you could sell the 929 and buy a brand new BMW1000RR. They're 75lbs heavier but you'd be closer to 200hp for less $$ and headache than forcing a 929 to make it.
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11-01-2010, 03:08 AM
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Anything is possible with $$. You should go turbo. With a nice rpm based boost controller it will bring the power in smooth and predictably, plus you don't need to get refills to use it. Or you could sell the 929 and buy a brand new BMW1000RR. They're 75lbs heavier but you'd be closer to 200hp for less $$ and headache than forcing a 929 to make it.
The CBR modification process is fun and price would be lower than I'm going to mod with BMW..so..that's why i'm doing this..
Now I havethe parts for engine are PCIII, exhaust,....maybe I need to make engine header to have more pressure for that...and forged pistons....
#9
11-01-2010, 10:15 AM
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The difficult part about a turbo is how easy it is to add more power once it's on. If you really only want 200hp, it'll only take about 6psi to get it. Start researching compressor maps that will be on the edge of efficiency at 8psi and about 11000rpm. That way it won't get too hot but will still spool up below 4000. At that low of a pressure you won't need to modify the internals. If you get bit like I did with my GTI, you'll want to lower the compression of the motor with forged pistons that drop at least a point, then space the head up. You also need complete control of ignition timing. Retard it about 2 degrees per psi to be safe, then slowly bring timing back on with the bike on a dyno. With low compression and race gas you'd be able to run the stock ignition advance at pressures near 20psi, that would put you in the 350-400hp range...
You probably won't find a kit. Making an exhaust manifold is easy, it's the intake that will be hard. You want to calculate the right runner length and plenum size for the rpm range you'll use most, then figure out how to cram it under the tank.
You probably won't find a kit. Making an exhaust manifold is easy, it's the intake that will be hard. You want to calculate the right runner length and plenum size for the rpm range you'll use most, then figure out how to cram it under the tank.
#10
11-03-2010, 04:07 PM
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The difficult part about a turbo is how easy it is to add more power once it's on. If you really only want 200hp, it'll only take about 6psi to get it. Start researching compressor maps that will be on the edge of efficiency at 8psi and about 11000rpm. That way it won't get too hot but will still spool up below 4000. At that low of a pressure you won't need to modify the internals. If you get bit like I did with my GTI, you'll want to lower the compression of the motor with forged pistons that drop at least a point, then space the head up. You also need complete control of ignition timing. Retard it about 2 degrees per psi to be safe, then slowly bring timing back on with the bike on a dyno. With low compression and race gas you'd be able to run the stock ignition advance at pressures near 20psi, that would put you in the 350-400hp range...
You probably won't find a kit. Making an exhaust manifold is easy, it's the intake that will be hard. You want to calculate the right runner length and plenum size for the rpm range you'll use most, then figure out how to cram it under the tank.
You probably won't find a kit. Making an exhaust manifold is easy, it's the intake that will be hard. You want to calculate the right runner length and plenum size for the rpm range you'll use most, then figure out how to cram it under the tank.
Thank you very much..your infomation are treasure for me..really appreciate...
Once I have done the bike, I will post on here...thank you.