I'm stuck/stumped. Got some of TA's adjustable pushrods from another board member awhile back, and:
I've shortened them as much as possible, but on every one the hydraulic lifter plunger is very nearly bottomed out - to the point that if I adjust/lengthen the pushrods by 1/2 turn, the valve starts opening (using a dial indicator). Surely that can't be good...
* Pushrod min length is 9 7/16" (using a tape measure, my mic don't go that big)
* Block was milled .040, the pistons average .004 below deck.
* Heads were shaved .017 (that I know, I don't know their history) to clean them up. (Piston-to-valve clearance is .3" or better (TA212 cam and Wiseco dished pistons), checking this is when I noticed the issue. Surely with clearance like that the heads haven't been milled down a huge amount...)
* Stock steel rockers.
* Felpro .040 head gasket
* New hydraulic lifters from PAE
* Valve stem heights are all equal, looks to me like right at 2.08" or 2.1" from head to top of stems.
Isn't the stock pushrod length shorter than the min on these adjustables, and if so, what gives - shouldn't the TA pushrods be able to adjust way shorter than stock?
I'm really open to suggestions - have I missed something? Does TA make different ranges of adjustable pushrods? I heard ch*vy lifters are shorter, how about them?
(Asking this over on V8 as well...)