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Cam Grinding

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martx-5

martx-5

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I've torn apart my TR3 engine, and am sending the cam of to Ken Gillanders at British frame & Engine. He is going to re-grind the cam for more duration etc. I opted for the 282 deg cam.

My question is...How do they do that?
 
Hi Art,

My understanding is that any regrind to increase lift or duration involves making the "base circle" smaller. That's how you get "more" metal in the lobe.

-Darrell
 
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There are other possibilities, like building the lobes up with welding and then grinding back down; but in general they just grind the base circle smaller to get more lift/duration.
 
This is a pretty interesting site from a company that has been around quite a while. A lot of technical data here and a video if you use Real Player that will show the process.

https://www.elgincams.com/video.html

This is what I wanted originally. The graphic that explains the "base circle" and how it can be reduced from what was explained above.
 
Here's a site in BC that has all of the TR6 profiles. Glad you guys started this, since I'll be looking for a new cam in a few months.

This is the flash version, not much on the HTML site. After the Intro, go to Cam Profiles and go down to Triumph and when you open the folder, the TR6 info will be there:

https://www.coltcams.com/container.html
 
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