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Buell Motorcycle Forum » Quick Board Archives » Archive through April 06, 2007 » Dyno run « Previous Next »

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Tom_b
Posted on Sunday, April 01, 2007 - 08:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

had my x-1 ran on a dyno and was surprised. out of three pulls the best was 82hp and 73.7 lbs. of torque. the torque seems pretty flat from about 3300 to 5000 rpm . the hp pulled steady all the way to the rev limiter kicking in at 6900 rpm. I had it on a dyno 2 yrs ago and numbers were 89 hp and 86 lbs of torque. I guess it is just wearing out. An o3 xb9 firebolt dyno'd at 75 hp, couldn't get the torque. an 07 uly dyno'd at 81 hp and an 03 xb9 lightning at 75 hp. Fun day at cassoday except now I'm thinking of a rebuild

(Message edited by tom_b on April 02, 2007)
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Firemanjim
Posted on Sunday, April 01, 2007 - 08:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Tom,were they the same brand dyno as I know that Dynojet numbers are always higher than Super-Flow or a Mustang.
And if it was set to give SAE HP, numbers will be off, as well as proper altitude/temperature compensation. It sounds like all the bikes were within the ranges expected on the same dyno.
I would go for a good tune on a dyno, set-timing,A/F ratio,etc for most power.You would be amazed at what a difference it can make. We tend to not notice the gradual loss of power because we ride the bike everyday.
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Rick_a
Posted on Sunday, April 01, 2007 - 11:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Numbers for most bikes vary with the miles on an engine, too. Usually you gain a few as things loosen up, and loose some as things start loosening up a bit too much. No tuning will return power due to deteriorating ring/cylinder sealing.
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Tom_b
Posted on Monday, April 02, 2007 - 12:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

the thing is staring to smoke a little so i think it may need some work. I beat the hell of it when I ride it so i shouldn't be surprised.
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Rick_a
Posted on Monday, April 02, 2007 - 10:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Mine did the same after about 15000 miles. Lost about 7hp and 8ft-lbs of torque, too. Didn't burn too much oil, but the crankcase breather started smoking up pretty good.
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