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TR2/3/3A TR3 camahaft discovery [Kas Kastner D Grind]

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M

mallard

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I'm getting everything cleaned up for the assembly of the engine next week and discovered that the cam is one of Kas Kastners. It is in great shape so I was going to use it. I was thinking it was a stock cam in the engine. I've been trying to find what the specs are for the cam without any luck. The only information I can find is that for a F grind cam that he used in a TR4 on the Saltflats. Mine has a D stamped under the his name at the end of the cam. Does anybody have the specs for the D Grind camshaft? The cam also has these numbers on it.

MC21434
301466

It also has the letter G stamped on the shaft near the center bearing.
 
'D' cam (had one in my TR3) will idle a little lumpy, but still streetable, IMO.
 
I had my cam re-ground by Ken at British Frame & Engine. It was called the "149" grind, and it's specs are exactly the same as the Erson 149 shown one up from the Kastner "D" grind on the chart linked to above. Similar to the "D", I find this cam slightly lumpy at idle, but overall, it makes a great street cam. I have a hard time keeping the revs down. This engine wants to sing to 6,000 rpm, especially in first and second. I'm trying hard to keep it under 5,500. I'll probably blow it up, but it sure is fun! :driving:
 
TR4nut said:
How about this?

Camshaft specs

Randy
Click to expand...

Great find Randy! I've been trying to figure out the specs on my mystery cam for awhile now. I inherited it from my dad who had it installed on a TR4 many years ago, and he can't remember what make it was. Maybe this chart will help him recall what kind it was.

Cheers,
Gavin
 
Thanks Randy for the link, just what I was looking for. It looks like I will have to drive the TR3 like my TR6. My wife wants the 3, maybe the cam will be something she won't like and I can have both.
 
I ran a D cam in my street 2.2 engine, and it was very nice.
 
martx-5 said:
I had my cam re-ground by Ken at British Frame & Engine. It was called the "149" grind, and it's specs are exactly the same as the Erson 149 shown one up from the Kastner "D" grind on the chart linked to above. Similar to the "D", I find this cam slightly lumpy at idle, but overall, it makes a great street cam. I have a hard time keeping the revs down. This engine wants to sing to 6,000 rpm, especially in first and second. I'm trying hard to keep it under 5,500. I'll probably blow it up, but it sure is fun! :driving:
Click to expand...
Hi martx-5 Could you refresh my memory on the valve lash you used for your cam? I may have asked before. Was it .014" intake and .016 exhaust?
 
mallard said:
I'm getting everything cleaned up for the assembly of the engine next week and discovered that the cam is one of Kas Kastners. It is in great shape so I was going to use it. I was thinking it was a stock cam in the engine. I've been trying to find what the specs are for the cam without any luck. The only information I can find is that for a F grind cam that he used in a TR4 on the Saltflats. Mine has a D stamped under the his name at the end of the cam. Does anybody have the specs for the D Grind camshaft? The cam also has these numbers on it.

MC21434
301466

It also has the letter G stamped on the shaft near the center bearing.
Click to expand...
When you find the specs for the D cam please post the correct valve lash. I have a Shadbolt M518 cam in my car which I believe is similar to the D cam. Shadbolt is no longer in business so i can't double check with them. I've been running the TR3 with a valve lash of .010 and wondering if I'm not getting the best from the cam?
 
The Kas Kastner "Competition Preparation Manual" (5th edition) for the TR4/4A and earlier cars lists .014" HOT for the recommended adjustment clearance, which brings up the eternal cam adjustment question: How hot is "hot"?
 
The lash used for my Erson 149 is 0.016" Intake and 0.018" exhaust. That was cold. Even if different cam specs are similar, that doesn't mean that the lash specs will be similar. Too many other variables.
 
The link in post 2 for the camshafts is a dead link. Fortunately we have a friend in the Wayback Machine and those pages were captured and archived a few times over the years. Here's a link to the "Triumph Cams" page:


It also looks like most, if not all, of the links and sub-links from Tilden work as well. I did not check all of the ones that they cited from other sources so another trip to the Wayback machine might be required to see if they were captured and archived if their links come up tango uniform.

Unfortunately either Tilden never got around to the TR250/5/6 cams or if they did, they were not captured.
 
Oops, asleep at the switch, that link should be:


or unfurled (make sure you stick an "http:" in front of this so it will take you there if the http is typed to the unfurled URL, it goes to the shorthand above) //web.archive.org/web/20130524070756/https://www.tildentechnologies.com/Technical/TriumphCams.html#TilTechCams
 
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