Yamaha Discussions about Yamaha ATVs.

Anyone using a Web 685 cam in a Rappy?

Thread Tools
 
Search this Thread
 
  #1  
Old 05-25-2003, 11:11 PM
RAPTORAZ's Avatar
Pro Rider
Thread Starter
Join Date: Dec 2000
Posts: 1,407
Likes: 0
Received 0 Likes on 0 Posts
Default Any using a Web 685 cam in a Rappy?

I noticed today that Web Cams updated their website and added another cam to the list. I was set on using a Stage II Hot Cam in my 727, but now this new Web 685 grind has me rethinking my choice. Anybody running the Web 685 grind?
 
  #2  
Old 05-27-2003, 06:36 AM
Ward660R's Avatar
Extreme Pro Rider
Join Date: Jan 2002
Posts: 4,104
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone using a Web 685 cam in a Rappy?

Do you ahve any specs for the cam? How does it compae to the stage 2?
 
  #3  
Old 05-27-2003, 03:41 PM
Ward660R's Avatar
Extreme Pro Rider
Join Date: Jan 2002
Posts: 4,104
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone using a Web 685 cam in a Rappy?

[img]i/expressions/face-icon-small-cool.gif[/img]Thanks
 
  #4  
Old 05-27-2003, 05:20 PM
14mins's Avatar
Elite Pro Rider
Join Date: Aug 2000
Posts: 6,549
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone using a Web 685 cam in a Rappy?

The web 685 is not a "drop in" cam. You will have to shorten all your valve guides, and then assemble and make a dry run with some plado. After you take it back apart you will then need to get the right clearences at the piston with the help of a grinder. I would also put brand new springs that have been cryo treated. That is a big cam. It might not be the hot ticket for a 300 foot race but should work well on hills. If your head will flow at 9000 rpm or better it should be good. You will not have much power below 3500 rpm and will have to set your idle higher. I do not think web has any on the shelf.
 
  #5  
Old 05-27-2003, 07:14 PM
lilMike's Avatar
Trailblazer
Join Date: Mar 2003
Posts: 58
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone using a Web 685 cam in a Rappy?

So with that said, which is the better cam to go with? Is the extra work worth the gain you would recieve with the bigger cam over the stage 2? Lets hear it.....
 
  #6  
Old 05-27-2003, 08:26 PM
14mins's Avatar
Elite Pro Rider
Join Date: Aug 2000
Posts: 6,549
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone using a Web 685 cam in a Rappy?

The specs are

valve lash intake .004 exhaust .006
valve lift intake .452 exhaust .424
duration intake 292* exhaust 289*
duration at .050 260* exhaust 257*
lobe center 108* exhaust 108*
 
  #7  
Old 05-27-2003, 08:39 PM
Ward660R's Avatar
Extreme Pro Rider
Join Date: Jan 2002
Posts: 4,104
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone using a Web 685 cam in a Rappy?

Sounds like a good cam for the 1/8 mile.[img]i/expressions/face-icon-small-happy.gif[/img][img]i/expressions/face-icon-small-wink.gif[/img]

What kind of price? The same I assume. I guess you need a core too don't you?[img]i/expressions/face-icon-small-sad.gif[/img]
 
  #8  
Old 05-27-2003, 08:50 PM
SLIM660's Avatar
Pro Rider
Join Date: Apr 2003
Posts: 517
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone using a Web 685 cam in a Rappy?

Got to love that cam!!!!!!!!!!!!!
 
  #9  
Old 05-27-2003, 11:23 PM
2001raptor2001's Avatar
Range Rover
Join Date: Apr 2002
Posts: 108
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone using a Web 685 cam in a Rappy?

i currently have that cam and 12.5 to 1. there is no power loss below 3500.
when i swapped the cam i also went with a bigger bore so who knows what the power gains might be.
only time will tell how hard it is on the valve train. i believe that on a 727 with stock size carbs this cam will not reach its full potential.
 
  #10  
Old 05-28-2003, 12:32 AM
14mins's Avatar
Elite Pro Rider
Join Date: Aug 2000
Posts: 6,549
Likes: 0
Received 0 Likes on 0 Posts
Default Anyone using a Web 685 cam in a Rappy?

[img]i/expressions/face-icon-small-wink.gif[/img]
 


Quick Reply: Anyone using a Web 685 cam in a Rappy?



All times are GMT -5. The time now is 11:51 AM.