Sbc pushrod question
 

350 Stocker Engine, Hydraulic Roller, Roller Rockers, Lifters have
.050-.060 plunge. Max RPM 6800. Question: Will there be a measureable
difference between 5/16 .080 wall pushrods vs. 3/8 .120 wall
pushrods? I am getting pulled different ways depending on the source.
Thanks in advance guys. J.R.

Re: Sbc pushrod question
 

Can,t go wrong with the heavier pushrods, but if you not run any spring pressure you can likely get buy with the 5/16 80 wall. You mite ck your lift with one then ck it with the other, if it the same run the 5/16.

Re: Sbc pushrod question
 

JR check out my website stewardperformance.com

Re: Sbc pushrod question
 

Denny, Do you feel a custom 5/16 push rod is a adequate for a high rpm SBC Stocker?
(200 / 400 # springs)

Re: Sbc pushrod question
 

Mark, a 5/16 .120 wall would be the least I would use on a SBC stocker engine.

Re: Sbc pushrod question
 

Thanks
Next question (s)
Sounds like about a.070 oil passage ..Enough for roller rockers? Anybody go less? Possible?

Re: Sbc pushrod question
 

You also have to lube the springs. The bearings in the trunnion of the rocker arm will operate on very little. I have run .025 on circle track engines with the right coating on the valve springs.

Re: Sbc pushrod question
 

Okay , coatings..Like?
Any experience without the coating?
I would assume you have to cool the springs to a certain degree too.
I also assume there's a fine mist of oil everywhere in there at higher rpm.

Re: Sbc pushrod question
 

I wouldn't think you would have any problem at all running a good quality 5/16 pushrods with that spring pressure. I ran them on my super stock engines for years with much higher pressure with no failures. Just got some 7/16 for the engine I am puting in my car. It will be interesting to see if there is any difference from the 3/8 that I have been running. I have mostly used comp pushrods in the past.

Re: Sbc pushrod question
 

They will work just fine without coatings I have plenty of racers using them now with zero troubles at all.

Re: Sbc pushrod question
 

Mike what wall are the 7/16 you are putting in your new engine

Re: Sbc pushrod question
 

Not sure they came with the engine when I bought it. They are a nice looking tapered tip type. I will get the engine back from Mike Thompson on Friday so I will look to see if they have a part number on them. I would bet they are 080 wall