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#895735 11/18/22 3:04 pm
Joined: Jun 2016
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mrcarb Offline OP
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The Triumph that I just bought may have hotter cams, the seller said that it may have hotter cams but did not know for certain. Would someone here know of someone with a lot of Triumph engine building experience that would know if the valve adjustment would be different with cams that are not stock?

Thank you in advance

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What is the Triumph you have bought? Most of the aftermarket performance cams are non-quietening ramps, so 2 thou inlet 4 thou exhaust, but the T140 and the Triumh production race cams have quietening ramps, so bigger clearances, typically 8 thou inlet and 10 thou exhaust. The T140 exhaust is the exception, having a different ramp and 6 thou gap, but no-one would describe that as a performance cam.

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The Triumph that I just bought is a T120V in a pre-OIF frame.

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If you do not know what camshaft you have, you would try the lobe center method to find more

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measuring the cam will tell you what it is.

the easiest way to find out something useful is to just measure lift with a dial indicator. dont even have to take it apart. knowing the lift will rule out a lot of possibilities.

measure the difference between base circle and as high as it goes, divide by 1.1 and thats it.


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