S&S 600 cam?

[Reddog74usa]

What CR does this cam run best at? Noisy, quiet? TQ or HP?

[wfolarry]

That cam is standard in a 113. Likes compression & will run out good. What size motor?

[Reddog74usa]

113 at 11.2 CR

[wfolarry]

It will hit hard. Ran one like that at the track & it was a wheelie bike. Finally got it to hook & ran 11.27. Changed some things around & got a best of 10.96 before we swapped it out. Hang on tight.

[HILLSIDECYCLE]

Sold Ultra Cycles here at one time, and installed a bunch of those.
At that time the 113" had a .520" cam in them, perhaps due to C.A.R.B. requirements.
That cam does work well. 11.2 might be a tad high for that.
Scott

[deathwish]

520 is an EPA compliant cam. The 600 in a 113, (standard in a normal build at about 10.2/1) if much more than 10.5/1 will give cranking issues unless you have compression releases. It will also be detonation prone when you get near 11/1. If you want to run a lot of compression try the 640 in the 11's and a 631 if you want more compression than that.

[HILLSIDECYCLE]

.640" at 11.7-8 from what we see.
Scott

[Reddog74usa]

Was just entertainin the thought. It has a .640 in it now and does pretty good. Thanks for the replies. 

[113evo1]

I have a question.
I’m assuming you are running the Ultima roller rocker arm’s with 1.675.1 ratio that come with the Ultima 113 motor.
When changing to a cam such as the S&S 600 cam that has a advertised lift of .600” using the 1.625.1 S&S roller rockers, wouldn’t you add 0.050” to the lift… there by changing the lift to .650” with the duration remaining the same?

The Evo rocker arm ratio is 1.625.1
The Ultima roller rocker arm ratio is 1.675.1
The Crane roller rocker ratio is 1.750.1

[Reddog74usa]

That may be so but I'm not changing the cam as it runs great the way it is. I was just checking out the 600 and got some very good info as usuall