Cam plate and oil pump preference
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From: poway
My crank is at the Indy getting trued and welded. It had .005 runout
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Joined: Jun 2006
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From: san antonio
AFAIK, one thing to note is that the Thayer pump only fits the later pump plates. Thayer did not make one for the early plates. SnS has both early and late pumps. I don't remember whether the SnS plate for early TC cams used the early or late SnS pump tho. I checked, the early SnS plate uses the late SnS pump (Or thayer, or stock fort that matter).
I also agree with the comments after my last from you, Kirby and Dawg; lots of good information and hope the OP takes advantage of it in his build plan.
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Joined: Nov 2021
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From: New york
Thank you everyone, lots of good information. Thats why I posted this. To make it good for years to come. Im using a different than stock cam plate because I definitely want to go away from the spring tensioners to the hydraulic.
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From: New york
I thought the welding stopped them from moving and going out of true again? They rotate on the pin and welding the halves to the pin would stop them from turning I thought? What does plugging and pinning mean?
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From: san antonio
Envision a hole machined at the seam between the crank pin and the flywheel with an over size pin pressed into the hole. I forget the press fit tolerances but I believe the pins are about .250" in diameter and the hole smaller by the specified press fit clearance. For me, pinning and welding is the way to go.
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From: deland,florida
we machine a hole half thru the pin & half thru the wheel & press a .250" pin in and weld over it,we did this way back in the day on the drag lower ends to try & keep them straight.plugging ir where a oversize hardened plug is pressed in the pin,increasing the interfit of the pin.this is what S&S and darkhorse does.simply welding the pin seemed like a good fix when the TC flywheels were first seen moving,but performance shops like us quickly saw it really didnt work all that great