Sportster Models 883, 883 Custom, 1200 Custom, 883L, 1200L, 1200S, 1200 Roadster, XR1200, and the Nightster.
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Old Nov 14, 2019 | 10:23 PM
  #11  
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Originally Posted by apache snow
Do these cams even work with 883 stock heads. If so the cam timing will bleed off some of your compression and you will have less power than the stock W cams. Unless the builder raised your compression with the pistons they used. Even then you may loose low end power.
according to the work order there was no head work done. The dyno sheet they gave me shows it goes from 1500 rpm straight up to 16 hp at 1700 rpm then pulls steady up to 60 hp at 5200 rpm then flattens out at 61.79 hp then drops down at 6000 rpm
for torque it goes from 1500 rpm straight up to 48 ft-lbs at 1700 rpm then to 63.35 ft-lbs at 4500 rpm then gradually down to 53 ft-lbs at 6000 rpm then drops off
I have also sent an Email to Dan at hammer performance asking for his advice, hope I hear back from him
 

Last edited by gerald martin; Nov 14, 2019 at 10:25 PM.
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Old Nov 15, 2019 | 08:04 AM
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Heres a Hammer basic conversion with stock cams and heads.




 

Last edited by apache snow; Nov 15, 2019 at 08:08 AM.
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Old Nov 15, 2019 | 10:15 AM
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Originally Posted by gerald martin
according to the work order there was no head work done. The dyno sheet they gave me shows it goes from 1500 rpm straight up to 16 hp at 1700 rpm then pulls steady up to 60 hp at 5200 rpm then flattens out at 61.79 hp then drops down at 6000 rpm
for torque it goes from 1500 rpm straight up to 48 ft-lbs at 1700 rpm then to 63.35 ft-lbs at 4500 rpm then gradually down to 53 ft-lbs at 6000 rpm then drops off
I have also sent an Email to Dan at hammer performance asking for his advice, hope I hear back from him
Email isn't the best method to contact them. With their spam blockers they often end up in their spam folder. Best to call or fill out an inquiry found on their website.
Calling is best. Remember they're in Idaho. Pacific Standard Time.
I hate to even speculate what a dealer charged for that but as you can see, Hammer is the way to go.
also, if you're looking for good performance, that stock AC and exhaust has to go.
 
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Old Nov 15, 2019 | 10:17 AM
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Originally Posted by 60Gunner
... that stock ... exhaust has to go.
As will your hearing...
 
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Old Nov 15, 2019 | 10:37 AM
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Originally Posted by lewk
As will your hearing...
That's a matter of opinion. Fact is the stock exhaust is extremely restrictive and not conducive to any kind of performance. It's half the problem of his poor dyno result.
Khromewerks makes a great slip on that's not obnoxiously, tinny loud and has great low and midrange torque without being resrictive. 88ft.lbs. on my 1250 @4500rpm.
Rush makes a good slip on too.
Hammer has dynos of all sorts of different exhausts. The stock exhaust gives up as much as 24HP in some cases.
 
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Old Nov 15, 2019 | 11:46 AM
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Can anyone confirm what cams they put in?



maybe I’m wrong and 551s will work with 883 stock heads? Idk
 

Last edited by Madnss; Nov 15, 2019 at 11:51 AM.
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Old Nov 15, 2019 | 11:59 AM
  #17  
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I’m rambling on my lunch hour, but if they are 551s they are redundant imho with those pour power numbers. Exhaust and intake and a tune is what’s lacking.
 
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Old Nov 15, 2019 | 12:01 PM
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Didn’t 551’s come factory in 03 and up xb Buells?
 
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Old Nov 15, 2019 | 12:02 PM
  #19  
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That says 1200s.
For high hp race applications? That's a stretch. Pretty mild for what the lift suggests. But what do you expect from a dealer.
Yeah stock in xb buells. Not sure of the years.
Best he can do at this point is a better exhaust and AC and retune accordingly.

 

Last edited by 60Gunner; Nov 15, 2019 at 12:07 PM.
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Old Nov 15, 2019 | 12:23 PM
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Originally Posted by Madnss
Can anyone confirm what cams they put in?



maybe I’m wrong and 551s will work with 883 stock heads? Idk
The cams they put in were part no. 25197-04
 
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