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I have a little pushrod info for you. The "professionals" say you add .050 to the total length when measuring with a solid or pumped lifter, and some said you dont. Well, I am not a professional engine builder, I'm just a flooring installer.
So if the lifter compresses .030-.060 right? If your witness mark left in the center of the valve is where it needs to be when you measured with the adjustable pushrod , using a solid or FULLY pumped lifter , then you take away the .030-.060 for the lifter..guess what, your pushrods are short.
THEN you have consider piston to valve clearence to consider also. They say you want MINIMUM of .120 on a 302. So make sure when you check piston to valve clearance be aware of that. I'm at .100. Little tight, but it will work as long as I don't over rev it to 6500 or higher
HOWEVER.. what "I" did was add .050 to the overall length. On my application, milled heads and thinner headgasket, if anything You would think I would need a shorter pushrod then the average? I've only seen a handful of people use a 6.80 pushrod with trick flow heads. But it is what it is, thats why you need to measure if you change cams and heads!!
(((JUST MAKE SURE THE LIFTER PLUNGER DOES NOT COMPRESS ANY!!)))
I thought mine wasn't when actually it was!! So I just grabbed another old one and used it 3-4 times then it started compressing too.
OH ONE OTHER THING.....my brother brought over one of his comp cams roller lifters for his blown foxbody he is building, it is taller than the stock explorer lifters! So again, use what lifter you will be running when measuring. I personally am running stock explorer roller lifters, I see no reason not to. Actually decent pieces!
Last edited on Wed Sep 9th, 2020 08:16 am by Junglejoe
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2000 EFI 302 Zspec T5 swap ranger