3/8 or 5/16 pushrods???
#3
please pardon the ignorance, but clear what? Is the limiting factor the passage in the heads? If it matters, Im running LS7 lifters and the stock rockers with the comp trunion upgrade. Im assuming the factory units are 5/16s? The pushrods I installed with the cam a few years ago were MTI chromoly 7.4 .080....not sure what that translates into as far as pushrod width
#6
TECH Senior Member
iTrader: (4)
3/8" wouldn't clear my AFR heads, but the 3/8" double taper did. Clear benefit in the upper RPM with the stiffer pushrods. 11/32" mantons are an option if the 3/8" won't clear or the double taper but I don't know if they will clear. The double taper is exactly for that reason, clearance at the upper and bottom ends. I have Trends that were machined out of solid billet steel. Very nice pushrods. I have a write-up on them as well.
#7
TECH Fanatic
iTrader: (27)
How do you determine a happy medium for strength and weight? Should I go for tapered? I currently run 11/32" Manton pushrods. I am not sure if 3/8's will clear. However, I run LS7 lifters, PAC 1518 springs and a blower cam. My shift point is 6500 or slightly less (I want to keep my stock bottom end together as long as possible). The car makes around 550 rwhp with the procharger. I will be swapping cams and will need to remeasure and order new pushrods.