Pushrods

I have a few Questions

I use to run 7/16 pushrods in my big inch BBC Nitrous motors and for some reason I switched to 3/8 when I switched over to a BBC blower motor. I think my reason was the cam was so much smaller I could use a 3/8.
I run a .739 .756 cam now and then I ran .900 +. I notice that a few of my pushrods showed some wear and I could not see from were it was rubbing the head. Then it dawned on me it may be flexing and causing this. What do you guys run in BBC combos? Yes I did order new 7/16 pusrods. I hope this was the right thing to do.


Todd Martin
Blown63Vette

 

For many years , i ran with 7/16 push rods ,every time i had to grind on headsto make room for it . i bought some head sets from oddy's and dart machinery , both were machined for 3/8 push rods, then i switched to manley 3/8 push rods 3 years ago and i never had problem with it . 370 lbs on seat .875 lift

 

Well I was running the CV products 3/8 .080 wall and I really think they were flexing. Could I be mistaken? The seat psi on mine is 375 lbs and I never let it get lower than 320lbs. I have the lash set at .028 straight across cold. The cam calls for .032 but I will not run anything that loose it think it will beat things to death.

 

WE HAVE BEEN RUNNING IRC FOR 6 YEARS NOW IN 7 DIFFERENT ENGINES FROM SUPERSTOCK TO BLOWN ALCOHOL. IN THE PROSTOCK I USE 450 LBS ON THE SEAT AND 1100 LBS OPEN WITH A 11.00 LONG PUSHROD,,,, NO WAY DO THE IRC FLEX
CALL MIKE AND TELL HIM THE BOAT GUYS SENT YOU !
WAR\IRC - Mike (253) 847-8221