Base circles of these cams?
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Teching In
Joined: Jun 2002
Posts: 27
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From: Pearland, Texas
Base circles of these cams? My cam was changed from a T1 (.558 lift 221 dur.) to a C2 (.581 lift 224 dur.) at MTI and now I have sewing machine syndrome bad . Does anyone know if there is a difference between the base circles of these cams?
TECH Fanatic
Joined: Jun 2002
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From: Upstate NY
Re: Base circles of these cams? Many cam grinders keep the base circle as large as possible by grinding the high point on the lobe very close to the cam bearing diameter.
So, the .581 (valve)lift lobe (.342 cam lift with 1.7's), could have a smaller base circle by about .025 or so than the .558 (valve) .328 (lobe) lift cam.
That's probably not enough to need different length pushrods IF you weren't on the short or long end of the optimum pushrod length to begin with.
"Sewing machine syndrome"?? You mean valve train clicking?
So, the .581 (valve)lift lobe (.342 cam lift with 1.7's), could have a smaller base circle by about .025 or so than the .558 (valve) .328 (lobe) lift cam.
That's probably not enough to need different length pushrods IF you weren't on the short or long end of the optimum pushrod length to begin with.
"Sewing machine syndrome"?? You mean valve train clicking?