Hi!

I have a question, i would like to change the cams, but i dont know what cams would i choose? i would like more power at low rpm.

my bike's specs: 2001 year 883/1200 with stock heads, high flow a/c, cycleshack, rejetted carb.

anyway, if i change the stock cams, do i have to change the stock pusrods, or lifters or rockerarms or springs or anything?

thanks!

hcsl
from Hungary

and additional info...

the compression is 10:1, maybe its important

thanks

Hi, hscl. I'm not an expert, but I'll share what little I have learned on the subject. Either N2 or N4 can be used with your stock springs, pushrods, lifters etc. The N2 is considered a great cam profile for low end performance w/ stock heads. The N4's will work, but you won't gain much with stock 883 valves.
I hope somebody will correct me if I'm wrong......
sage

This should help.....http://www.sportster.org/tech/cams/N2vsN4.jpg

That's too much compression for an N2, IMO

I had V2 in my bike with 10.5: 1 Pinged horrible had to take them out,need head work before cams,been there tried that.

You should not need new lifters as long as your old ones don't have excessive miles on them. Roller cams such as what the Sporty engine has don't put a wear pattern on the lifters like flat tappet cams do ... so cams and lifters don't need to be replaced as a new set.

You won't a different length pushrod because the base circle of the Andrews cams is not that much different than your stock cams, at least not enough to require a different length pushrod.

You should not need roller rockers until you get a set of cams with greater than .550" lift. Very high lift cams put a lot of side loading on the valve guides that can be elliminated with roller rockers ... but, since the N4 cams only have .490" lift, you won't need them.

Not sure about the springs ... but if you have lots of miles on your old springs, they have lost a lot of there seat pressure.

I am going with the V4 came is a good duration I believe a little bit above stock at a 490 duration lift a little smaller then the S&S 500 but not much diffrence. I would go with that or possibley a V6 cam. Look at the diffrent specs on each and info giveing on what there used for and deside from that which one you are better with.

.............the compression seems high for stock 883 heads, is that correct??

i see that i dont have to change any additional parts if i'll use N2 or N4, till i havent much miles on my bike. its OK.
but... if 10:1 compression is too much for N2s, and N4 doesnt work with stock heads without pinging what could i do?
what kind of headwork do you mean? only after it can i use N4s? is it correct? what do you mean headwork and there isn't any other way to use new cams for much power and torque at low rpm?


thanks
hcsl

thank a lot.

but just now realized that i have 9.5:1 CR with reverse dome pistons.

so i have to ask you guys again...

what kind of cams do you propose me for more hp and torque at low rpm?
once again the spesc: 883/1200, reverse dome pistons, stock head, high flow a/c, rejetted carb, cycleshack. usually i ride at town.

i dont know N2 gives any notable gain? and what about N4?

thanks again, its hard to get infos in my mothertongue -hungarian, so maybe my questions seems stupid a bit

Hi, hscl. I'm not an expert, but I'll share what little I have learned on the subject. Either N2 or N4 can be used with your stock springs, pushrods, lifters etc. The N2 is considered a great cam profile for low end performance w/ stock heads. The N4's will work, but you won't gain much with stock 883 valves.
I hope somebody will correct me if I'm wrong......
sage


Sage has it dead on. N-2 is the way to go with stock heads.

If you dont do any head work go with the N2, but you are not going to notice much difference for the money you are going to be spending.

thanks for the help, but please explain me what do you mean headwork? what does mean "ported and polished the heads"hed some mentioned this site? what do i have to do, wiht what kind of tools? is there any written specification and pics?

Aside from the money spent on the N2s, the time doing the tear down and reassembly is a bit much for the performance gain. Most recomendations I've seen favor headwork over installing these cams. But if you want 'em, go for it! I've also seen reviews where folks were completely satisfied with the acceleration changes they got from the N2s.
So like any old "what's the best _______" argument, you'll get a lot of different answers. Try searching sportster.org for even more input.

I recently installed N2 cams in a stock 1200. I documented my experience here: N2 Experience (http://www.xlforum.net/vbportal/forums/showthread.php?t=22695)

Bottom line: I'm satisfied with the outcome, but I only spent $160. If I had to pay retail for cams and then pay a wrench to install them, then I would not do it. Contrary to popular opinion, I also would not install N4 cams. They move the torque curve too far up the rpm range for my style. As Buzzelli states in his Sportster Performance Handbook... (paraphrased) "for most street ridden bikes, the stock Sportster cams work very, very well."

Has anyone installed the new N3 cams? A guy on one of the forums somewhere (?) installed them in his 1200. He said that they had great low end torque and only gave away a little at the top end versus the N4's. Sounds like a good compromise, but I can't find any verifiable dyno tests.

Has anyone installed the new N3 cams? A guy on one of the forums somewhere (?) installed them in his 1200. He said that they had great low end torque and only gave away a little at the top end versus the N4's. Sounds like a good compromise, but I can't find any verifiable dyno tests.

The dyno on the N3 is here (http://www.xlforum.net/vbportal/forums/showthread.php?t=22695&page=2). Scroll down to find the post by barry1967.