3/8 or 5/16 pushrods???
3/8 or 5/16 pushrods??? 2003 Z06 with Livernois Stg 3 243 heads and 290 292 592 595 lll LSA cam. I measured the pushrods and need a 7.375, should I go with 3/8 or 5/16 rods?
Thanks
Thanks
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
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.
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.
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HKE lists their branded pushrods (which I assume are Manton customs) as clearing factory heads with factory rocker arms for the 3/8"... Why wouldn't it work with roller rockers as well?
