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  #1  
Old 1st April 2008
Johnny Ableto Johnny Ableto is offline
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Default torque/cams?

My X1 doesn't seem to have the bottom end and mid-range torque that my old 1988 sportster had. I've heard that fitting stock sportster (D grind?) cams will increase the bottom and mid and sacrafice top end.
Has anyone done it?
Any ideas?
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Old 1st April 2008
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LLOYD883 LLOYD883 is offline
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Default

The stock D cams are fine for mid-range torque but if you really want low-end go for the W cams, big difference. The W's increase the cranking pressure (compression) quite a bit as the intake valve closes at ▒26*ABDC vs ▒41* for the D's (which is what lowers the torque peak from ▒4500RPM to ▒3500) and I am also told that they add about 5HP.
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  #3  
Old 1st April 2008
Johnny Ableto Johnny Ableto is offline
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Thanks for that Lloyd883. Thats good info. John.
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  #4  
Old 2nd April 2008
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What exhaust are you using?

Your stock cams have quite a bit of overlap, which makes them very sensitive to the exhaust system. An exhaust system that pushes back in the midrange will wipe out midrange power. The factory exhaust does this terribly.

You can make lots of bottom end and midrange with your stock cams.
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  #5  
Old 2nd April 2008
Johnny Ableto Johnny Ableto is offline
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Using supertrap exhaust. It's not that the bottom and midrange is bad but nowhere near as good as my old sportster, I wonder if the difference could be the S & S shorty G ( I think ) and the steep advance curve of the 1988 1200.
Thanks for the reply,
John
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Old 2nd April 2008
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A super G is WAY TOO BIG of a carb for a stock bore X1. You should have an E.
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  #7  
Old 2nd April 2008
Johnny Ableto Johnny Ableto is offline
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The carb was on the old sportster (the X1 is injected) and it may have been an E.
Thanks for reply,
John.
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  #8  
Old 20th May 2008
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I'd say by all means, insure your engine is tuned properly and exhaust correctly selected before making rash guesses. The weight of the Buell should help it leap right out, compared to a stock Porkster. Few machines make it down the 1/4 mile in significantly less time than others, by being "whimpy" in the first 60 feet.
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