Push rod limitations

Ian Hill · 02-15-2010, 07:44 AM

I run a 350/ 330 IHRA crate motor with .435/ .465 valve lift. we just pulled the engaine apart for freshening and some of the push rods have slight rub marks on them from where they come up through the heads. i am definately going to add more clearance in these areas but i also have been reading lots on the trend to go towards larger diameter push rods. Mine are the 5/16 - .083 wall and was thinking of going to 3/8 dia. Any thoughts?

Thanks
Ian

02-15-2010, 07:44 AM	#1
Ian Hill Member Join Date: Sep 2008 Posts: 216 Likes: 0 Liked 6 Times in 3 Posts	Push rod limitations I run a 350/ 330 IHRA crate motor with .435/ .465 valve lift. we just pulled the engaine apart for freshening and some of the push rods have slight rub marks on them from where they come up through the heads. i am definately going to add more clearance in these areas but i also have been reading lots on the trend to go towards larger diameter push rods. Mine are the 5/16 - .083 wall and was thinking of going to 3/8 dia. Any thoughts? Thanks Ian