120R to 124
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Tourer
Joined: Jul 2014
Posts: 261
Likes: 8
From: Noplace
120R to 124
After reading as much as I can find on the topic, I am still not seeing the answer I have been looking for in any recent threads. I am rebuilding my 120R, keeping the 266 cams, and happy at the 10:5:1 compression. (Yes I am going with beehive springs in the heads) Since my cylinders need to be bored I was originally going to use the .10 over SE piston kit for the 4.060 bore.
Now, I am thinking to go to 4.125 on the bore (124”). I have been reading about the T-Man kit and there is some mention of machining needing to be done on the spigot and wondering why?
Is the larger bore shifting the rod centerline and introducing a clearance issue? Before I order up some Wisco or CP Carrilo pistons and taking the cylinder to my local machine shop, just wanted to clarify and avoid a disaster.
Now, I am thinking to go to 4.125 on the bore (124”). I have been reading about the T-Man kit and there is some mention of machining needing to be done on the spigot and wondering why?
Is the larger bore shifting the rod centerline and introducing a clearance issue? Before I order up some Wisco or CP Carrilo pistons and taking the cylinder to my local machine shop, just wanted to clarify and avoid a disaster.
Road Warrior
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
After reading as much as I can find on the topic, I am still not seeing the answer I have been looking for in any recent threads. I am rebuilding my 120R, keeping the 266 cams, and happy at the 10:5:1 compression. (Yes I am going with beehive springs in the heads) Since my cylinders need to be bored I was originally going to use the .10 over SE piston kit for the 4.060 bore.
Now, I am thinking to go to 4.125 on the bore (124”). I have been reading about the T-Man kit and there is some mention of machining needing to be done on the spigot and wondering why?
Is the larger bore shifting the rod centerline and introducing a clearance issue? Before I order up some Wisco or CP Carrilo pistons and taking the cylinder to my local machine shop, just wanted to clarify and avoid a disaster.
Now, I am thinking to go to 4.125 on the bore (124”). I have been reading about the T-Man kit and there is some mention of machining needing to be done on the spigot and wondering why?
Is the larger bore shifting the rod centerline and introducing a clearance issue? Before I order up some Wisco or CP Carrilo pistons and taking the cylinder to my local machine shop, just wanted to clarify and avoid a disaster.
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inverse121
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Aug 24, 2010 04:30 PM
