bigger springs with .600 cam?

[Black Dawg]

did you notice a difference between cams?? dyno numbers?

Big difference. I'm still looking for a dyno. Thought I found one locally but the mechanics want to "keep" my bike for 2 days to play with it. I told them I only wanted a couple of pulls with me there and check full throttle a/f. They said that's not how they do it. I laughed and said that's not how I do it and hung up. I'm not about to leave my bike with a bunch of a-holes and have them beat the shit out it.

 

[lee]

so by simply putting in a 600 cam and new springs and nothing else you make noticeable power gains?

 

[Black Dawg]

so by simply putting in a 600 cam and new springs and nothing else you make noticeable power gains?

Yes, but obviously you need a good exhaust and a good intake to get the most out of it. Good meaning functional, not bling. See my sig.

 

[lee]

I got the triple x G on the way (been on the way for over a month), a 2 into 1 (although not necessarily a performance specific exhaust) on the way shortly and the S&S dual intake - so should be good - thanks Black Dawg - ps - is it easy to fit the cam and the springs??

 

[lee]

sorry - forgot to ask - what sort of RPM range does the 600 do the business?

 

[Black Dawg]

The 600 cam has a very wide power band. No loss of low end with a good bump in the mid range and higher rpm power all the way to the stock rev line.

The cam change is simple. My bike came stock with the red stripe springs so those weren't changed. I highly recommend having your jugs cut to zero deck or within .005. This will increase your compression to 10.5:1 and make a noticable difference in overall power.

 

[Chopper Dave]

The 600 cam has a very wide power band. No loss of low end with a good bump in the mid range and higher rpm power all the way to the stock rev line.

The cam change is simple. My bike came stock with the red stripe springs so those weren't changed. I highly recommend having your jugs cut to zero deck or within .005. This will increase your compression to 10.5:1 and make a noticable difference in overall power.

Hey Black Dawg.......did you just have the jugs done.......or did you also port and polish?

 

[Black Dawg]

The heads are untouched. I had one cc'd to see where we were at on compression but we didn't mill it.

Frankly, I don't think a port and polish will add much unless you plan on a huge cam and to twist it higher than the stock redline. I did notice my stock ports were already blended.

 

[lee]

thanks Black Dawg - very helpful info there

 

[rhinoevans]

I emailed S&S last week on a 2002 Pitbul 107 motor about the springs for a .600 cam upgrade. S&S responce was " The 600 cam should not be a problem with those springs."

 

[bdmridgeback]

I was told that by S&S and 3 dealers before I did my .600 cam over a year ago.

I had no intentions of revving it above the stock redline anyway.

 

[stlmikie]

How about the 630? New springs?

 

[bdmridgeback]

Yep!

 

[rhinoevans]

I had no intentions of revving it above the stock redline anyway.

What does that mean in relation to cam and springs??

 

[Bocephus05]

What does that mean in relation to cam and springs??

Big revs + Big lift cams with violent ramp+incorrect valve springs= floating valves.

 

[Chopper Dave]

I am running the .600 cam now.....and I already had the red striped .640 springs in my bike bike pulls nice now...I noticed a big difference from last summer when I had the .569 cam in it!:2thumbs:

 

[EJ]

I've got the .600 cam in my bike and the .600 springs and have not had any problems but thats just my :zz2cents:

 

[rhinoevans]

I have the 600 cam also, from the factory (2002 Pitull). I have no idea what springs are in there, and I do believe the 640 springs came out sometime after 2002.

 

[LDO]

I contacted S&S and Big Dog about my motor and I was told that they ran the .640 springs in all the 107 motors but you'll have to check & see if you have the 520 or 600 lift cam as they used both in 2003 (my year)...

 

[Mongo]

LDO, if I had to bet I would say you have the .600 lift cam