510revisited Posted August 18, 2019 Report Share Posted August 18, 2019 Anyone know the specs on these cams. my 510 l20b w5? whatever smog head l18 a87 73 620 I had access to today. Any and all help is appreciated Quote Link to comment
Stoffregen Motorsports Posted August 18, 2019 Report Share Posted August 18, 2019 The U20 cam will be stamped with an A,B or C on the back. They are all different. Quote Link to comment
datzenmike Posted August 18, 2019 Report Share Posted August 18, 2019 Also they probably aren't all made at the same forge. There may have been changes in metallurgy so some numbers are simply casting revisions. Generally the L20B cam is 2480 and 0.413" lift*. There are some slight changes in overlap * I doubt this duration is @ 0.050" valve lift that is standard today. Quote Link to comment
thisismatt Posted August 18, 2019 Report Share Posted August 18, 2019 I would name it Cam Ron Diaz Quote Link to comment
510revisited Posted August 18, 2019 Author Report Share Posted August 18, 2019 How 'bout Cam Ron Frye? So from the sounds of things, they are both stock... or at least the u20 Quote Link to comment
datzenmike Posted August 19, 2019 Report Share Posted August 19, 2019 U20 is on all L20B cams 2 hours ago, Stoffregen Motorsports said: The U20 cam will be stamped with an A,B or C on the back. They are all different. I have a C? cam in the U67 beside me. C (5 or 3 it's poorly stamped) space 142 with an A stamped diagonally over the 142 Quote Link to comment
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