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  #101  
Old 6th March 2019
tattooglisha tattooglisha is offline
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Quote:
Originally Posted by Haegar View Post
Hi,
here is a Dynosheet from my 2002 XL1200 with a similiar configuration.
Compression 9,8:1, W cams, 2in1 Supertrapp (27discs), Mikuni HSR42, programmable Ignition and ported Heads. The 72hp and 104NM are Rearwheelpower. This should be around 80 to 85hp at the crank. I also tested the Andrews N4 but I go back to the W's. Below 4K you lost so much ridebillity with the N4 that the 5-7Hp gain in the high RPM range isn't it worth to keep them. Even with the W I'm able to run 12,1s and 105mph at the 1/4mile
Pinging is a problem with the W cams but with a correct ignition curve (like Dynatek #4) it's not dramatic. I ride this configuration nearly 10Tmiles without any problems.
Also my brother changed the original N4 in his Buell Cyclone to W and his much happier now. And we are no cruisers. My is a caferacer and I ride it like a modern bike.
So, keep the W cams and be happy.
Greetings from Germany
Christoph
Tnx man!
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  #102  
Old 6th March 2019
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Lukidj Lukidj is offline
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Yeah. The real life and Dyno hp numbers is a difference.
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  #103  
Old 7th March 2019
tattooglisha tattooglisha is offline
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Sportster/Buell Model: xl1200s
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Quote:
Originally Posted by Haegar View Post
Hi,
here is a Dynosheet from my 2002 XL1200 with a similiar configuration.
Compression 9,8:1, W cams, 2in1 Supertrapp (27discs), Mikuni HSR42, programmable Ignition and ported Heads. The 72hp and 104NM are Rearwheelpower. This should be around 80 to 85hp at the crank. I also tested the Andrews N4 but I go back to the W's. Below 4K you lost so much ridebillity with the N4 that the 5-7Hp gain in the high RPM range isn't it worth to keep them. Even with the W I'm able to run 12,1s and 105mph at the 1/4mile
Pinging is a problem with the W cams but with a correct ignition curve (like Dynatek #4) it's not dramatic. I ride this configuration nearly 10Tmiles without any problems.
Also my brother changed the original N4 in his Buell Cyclone to W and his much happier now. And we are no cruisers. My is a caferacer and I ride it like a modern bike.
So, keep the W cams and be happy.
Greetings from Germany
Christoph
What heads do you have?
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  #104  
Old 2 Weeks Ago
npaisnel npaisnel is online now
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Quote:
Originally Posted by blakjak View Post
Not that much more aggressive. They do work a bit better with high compression (10:1) and they move the powerband up the rev range a bit more (around 3500 rpm). You'll notice a nice jump in that area over what the W cams would have done.

I don't think you'll regret it at all unless you absolutely do nothing but putt-putt around all day at 2500 rpms.

IMO - I'll bet you'll think it's a very nice change.


For now it is too late, as I had time constraints and a ferry to catch to get my build done, and a time period when it could be done, so I went with the Andrews N4 cams, but I do remember reading this thread before and wondered if I was making a mistake with the N4's as I did not really want the power moved up at all.
I live some where that I do putter around at 2500-3000 rpm...and below 40 mph due to speed limits...So a good blast of power in the lower revs is more what i wanted. But yes I do want the grunt in the midrange for when I go away to the mainland and proper roads

If I ever changed cams again, what should i go for ?

1275 kit flat top pistons
valves oversized high flow valves – 1.725” intakes and 1.485” exhausts
Heads taken to 57 cc
10.35:1 compression
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  #105  
Old 2 Weeks Ago
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For me, since I am keeping the stock 883 heads, "W" it is.

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  #106  
Old 2 Weeks Ago
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You already know what cams. You're running the right exhaust for it too.
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  #107  
Old 1 Week Ago
tattooglisha tattooglisha is offline
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Quote:
Originally Posted by vagrant318 View Post
Thread resurrection..
I just had a 1250 kit installed in my sportster last summer and was kinda thinking I should have stuck in N4 cams but looking at the dyno chart the page before- the W grind kicks in sooner and has a linear power gain with no dip in power like the N4 in low rpms. So that was seeminly the best info I found regarding power gain and cams especially since Im interested in usable power as opposed to maximum peak power.
W grind rules as low and mild also not so bad in high rpm. I run them and i tried N6 and have them in a box. Angles of W cams are cool for street use. I would like to have cam that has same angles but only bit higher lift,like .500 or so that stock springs can suport without issues. N6 gives me about 100hp but that cams start late for me. I like torque and that pull in low mild rpm that is usable ... Anyone knows,maby Aron HPerformance ,could i regrind N6 to be more like w cams,I know i could make them N4 angles as Arron said.Tnx.
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  #108  
Old 1 Week Ago
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vagrant318 vagrant318 is offline
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Quote:
Originally Posted by tattooglisha View Post
W grind rules as low and mild also not so bad in high rpm. I run them and i tried N6 and have them in a box. Angles of W cams are cool for street use. I would like to have cam that has same angles but only bit higher lift,like .500 or so that stock springs can suport without issues. N6 gives me about 100hp but that cams start late for me. I like torque and that pull in low mild rpm that is usable ... Anyone knows,maby Aron HPerformance ,could i regrind N6 to be more like w cams,I know i could make them N4 angles as Arron said.Tnx.
With my new set up I'm going N4 , 1275 with reverse dome pistons and more headwork done
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