Pushrod length

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   Hi all, new here. I have a question. Heres my build:1968 390 +30
4.25 scat crank
Flat top mahle pistons
Hydraulic roller comp cam 234@50 .587 lift 112° seperation
Lunati hydraulic lifters link bar
Harland sharp rockers 
72cc edelbrock heads 
Performer rpm intake
I measured pushrod length tonight and got 8.33125
Leaving no threads underside of rocker allowing 2 threads of adjustment per harland sharp. Does this number seem right to anyone with a similar 445 stroker build???

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EBERSCHEID1031 Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Joined: 14-July-2019 Location: Billings montan Status: Offline Points: 1	Post Options Post Reply Quote EBERSCHEID1031 Report Post Thanks(0) Quote Reply Topic: Pushrod length Posted: 14-July-2019 at 6:41PM
	Hi all, new here. I have a question. Heres my build: 1968 390 +30 4.25 scat crank Flat top mahle pistons Hydraulic roller comp cam 234@50 .587 lift 112° seperation Lunati hydraulic lifters link bar Harland sharp rockers 72cc edelbrock heads Performer rpm intake I measured pushrod length tonight and got 8.33125 Leaving no threads underside of rocker allowing 2 threads of adjustment per harland sharp. Does this number seem right to anyone with a similar 445 stroker build???

gregaba Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 02-December-2012 Location: Oklahoma Status: Offline Points: 108	Post Options Post Reply Quote gregaba Report Post Thanks(0) Quote Reply Posted: 31-July-2019 at 3:24AM
	Your length seems a little short. It does depend on how much head and block work was done. I would get a good adjustable push rod and install it and get a correct measurement. As much as push rods cost now you don't want to buy more then one set. I would check each push rod because there is sometimes different length's for each push rod depending on your block. Greg
	Greg

aquartlow Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 19-December-2011 Location: Summerfield, Fl Status: Offline Points: 2221	Post Options Post Reply Quote aquartlow Report Post Thanks(0) Quote Reply Posted: 31-July-2019 at 6:42AM
	Also make sure the pushrod length is taken with the lifters internal plunger at about 1/2 it's travel, if the plunger has .060" travel you will want about .030" preload when the pushrods are installed.
	www.supermotors.net/22468 Yeah, It's a Hybrid...It burns gas and tires. No matter how good she looks, somebody, somewhere, is tired of her sh*t. Beauty is skin deep, ugliness goes clear to the bone.