Jono.B Posted May 28, 2009 Report Share Posted May 28, 2009 Hi All, when I bought my second 4k quite some time ago as well as the complete motor the guy I bought it off gave me a cam with iot that has already been ground. now on the end of the cam the code " T121 " has been manually ground into it, does anyone know what grind this may be. the guy I bought it off was from west Auckland in NZ. I was just hoping maybe someone knew so I don't have to pay $100 to get it camdoctored just to find out what the grind is. I need to know because I need to find out whether I will need to upgrade the bvalve springs or not. Quote Link to comment Share on other sites More sharing options...
Felix Posted May 29, 2009 Report Share Posted May 29, 2009 The T121 is a Kent Cams Mild Road grind 270 Degrees duration in timing 26/64 ex timing 69/21 in lift 9.74mm ex lift 9.59mm 109 Degrees Lobe Separation Angle 0.30mm 0.36mm valve clearances. It is very similar to the Tighe 113 and Tighe 104 that quite a few guys are running around here. Will give a very strong midrange with a wide powerband and a mild lope at idle. Quote Link to comment Share on other sites More sharing options...
Jono.B Posted May 29, 2009 Author Report Share Posted May 29, 2009 you my friend are a legend. Quote Link to comment Share on other sites More sharing options...
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