adjustable cam sprocket

[coalroostr]

ok, copied from http://www.webcamshafts.com/

Degreeing In Your Camshaft means synchronizing the camshaft's position with the crankshaft. A few degrees of misalignment can affect the engine's operation dramatically. If there were no manufacturing tolerances, you would only need to line up the marks on the timing chain sprockets and the cam would be degreed, but with a group of components (the camshaft, crankshaft, timing chain, and sprockets) all with their own standards and tolerances that when installed, can stack up against you. You can never be sure that the cam is in it's correct position. Always degree in your Web Cam Racing Cam for best performance.

So, here I've taken a snap shot of the adjustable 450r cam sprocket for you folks to help illustrate.

chad502ex.com

[brif]

How much was that adjustable cam sprocket? Why couldn't you just slot the stocker?

[chad502ex]

Originally posted by brif
How much was that adjustable cam sprocket? Why couldn't you just slot the stocker?

adjustable cost is $15-20, i think. don't remember tho.

you could slot yourself if you wanted, but why not just spend a couple of bucks and not worry about it.

i guess you could but i wouldn't.

:confused:

chad502ex.com

[chad502ex]

additional comments to the adjustable cam sprocket,...

this is where cam timing is critical when using these adjustable cam sprockets.

I've drawn an illustration using the cam i used in my setup to illustrate a cams exhaust/intake overlap. this layout can be used for any cam you want to degree in. Look how the exhaust [green] and the intake [yellow] overlap near TDC.

There is a point in the engines 720 degree rotation where all valves are open- this is called overlap.

generally speaking, the bigger the overlap the more the cam is designed for top end power. the least amount of timing overlap- the more the cam is used for bottom end grunt.

chad502ex.com

[chad502ex]

...
768 degrees - 720 degrees = 48 degrees of overlap

start at TDC in the center of both circles, then rotate clockwise on the left circle until TDC again. then rotate counter clockwise on the right circle until TDC.

[beak7707]

Is anybody running one of these? If so does it help much, what are the improvements?

[brif]

I ordered mine today. About $32. I need it because I'm running the johnson cam, so I kinda need it. I also found out that the stock sprocket is pretty hard. As chad has said it's just better to get the new sprocket vs. slotting the stocker.

[chad502ex]

Originally posted by beak7707
Is anybody running one of these? If so does it help much, what are the improvements?

beak,what are you talking about? the slotted sprocket? if so, the slotted sprocket helps you tweek in a hi-performance cam. if you decide to purchase a "drop-in" cam, then you do not need to get a slotted sprocket.

brif, the johnson cam is one of the most agressive cam to get for the 450r. i think you'll really enjoy that cam a lot. hope you have an engine to complement. i choose the Megacycle X2 cause i ride XC/climbs, but still need some top end (mid-to-top with 48 degrees overlap). What type of riding do you do?

everyone, i've heard that the johnson cam is one of the best top end cams (all top with 60 degrees overlap) next to the Megacycle 801x3 (with 64 degrees of overlap), but the johnson cam is a top end cam that is shipped with no cam sprocket flange. This means the user buyers have to press one on themselves

these cams require new followers, titanium tops and retainers, and dual stiffened cam springs to boot!

hope this helps.
chad502ex.com

[chad502ex]

tommorrow i'll post a cam degree setup pic on a 450r engine for everyone to see what is involved

[coalroostr]

push

[brif]

Originally posted by chad502ex

brif, the johnson cam is one of the most agressive cam to get for the 450r. i think you'll really enjoy that cam a lot. hope you have an engine to complement.

chad502ex.com [/B]

Right now I've been running the sparks cam, switching to the johnson. The sparks cam was really choking up my FST 500. I'm hoping this cam along with the valve job and port work from forward motion that it will wake my quad up........:D

[chad502ex]

Originally posted by brif
Right now I've been running the sparks cam, switching to the johnson. The sparks cam was really choking up my FST 500. I'm hoping this cam along with the valve job and port work from forward motion that it will wake my quad up........:D

bet it will!
:macho

[Xowner]

Originally posted by brif
Right now I've been running the sparks cam, switching to the johnson. The sparks cam was really choking up my FST 500. I'm hoping this cam along with the valve job and port work from forward motion that it will wake my quad up........:D

selling the sparks cam or already sold it?

Thanks

[brif]

I'm going to sell it, haven't tried to yet.

[chad502ex]

Originally posted by Xowner
selling the sparks cam or already sold it?

Thanks

i have a spare sparks cam too. a friend has offered me $100.00 for mine.



:confused:

[Xowner]

so who wants to make me the best deal ?

[chad502ex]

Originally posted by Xowner
so who wants to make me the best deal ?

i only make the best deals with my friends. if you are not my personal friend that i want a fair price. either way mine is sold. the question is reflected, what is your best offer?

[chad502ex]

ok, as promised here is the cam degree setup

[chad502ex]

close up of the cam degree setup

[chad502ex]

a custom piston stop tool you could make,,..
:D

[chad502ex]

soft HONDA RED modeling clay

[chad502ex]

using a razor blade to slice the clay to measure thickness

[chad502ex]

push,.

[culookn]

do this sprocket make a huge diff in perf?

[chad502ex]

Originally posted by culookn
do this sprocket make a huge diff in perf?

i would say yes if you are installing a cam with performance of HRC and above. HRC is still considered "drop-in" but timing can be off as much as 3 degrees with cam chain stretching and follow wear, spring softening, and bearing breakin. 3 degrees cam make a difference in running lean or rich