Do diffrent heads require diffrent length pushrods?

Gearhead999 · 10-18-2005, 09:42 AM

You bet the pushrods are different. They are also different from head to head and engine to engine. Deck height is different and assembled height is different.

I recently purchased a set of Canfield heads. In the instructions that came with the heads they tell you all about specs and such. On the back of the instructions this statement is printed.....

"Good valve train geometry starts when the right length push rod is used for your specific combination of deck height, cam base circle, lifter length and choice of rocker arms. The fact is, if you are using stock length push rods, your valve train geometry is probably wrong. Before ordering push rods, BUY AN ADJUSTABLE PUSH ROD and determine the proper length for your combination."

That about sums it up.

skiwesser · 10-18-2005, 04:58 PM

Agian I have no experence with this stuff. Both my Bros. have put together several motors, but niether know about this.
Can we adjust the adj. p-rods ourselves?
Little Bro is a chevy man & he adjusts his lash (or whatever) with the car running, at least he did for a guy and fixed it in like 15 Mins.

10-18-2005, 09:42 AM	#1
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Re: Do diffrent heads require diffrent length pushrods? You bet the pushrods are different. They are also different from head to head and engine to engine. Deck height is different and assembled height is different. I recently purchased a set of Canfield heads. In the instructions that came with the heads they tell you all about specs and such. On the back of the instructions this statement is printed..... "Good valve train geometry starts when the right length push rod is used for your specific combination of deck height, cam base circle, lifter length and choice of rocker arms. The fact is, if you are using stock length push rods, your valve train geometry is probably wrong. Before ordering push rods, BUY AN ADJUSTABLE PUSH ROD and determine the proper length for your combination." That about sums it up. __________________ "Support our Troops" Dave 1968 Cougar 2004 Thunderbird 2007 F150 Harley-Davidson, SuperCrew 1986 LTD 1997 Ranger 1992 Honda Civic

10-18-2005, 04:58 PM	#2
skiwesser Registered Member Join Date: Sep 2000 Location: rock hill,S.C. 29730 Posts: 420	Re: Do diffrent heads require diffrent length pushrods? Agian I have no experence with this stuff. Both my Bros. have put together several motors, but niether know about this. Can we adjust the adj. p-rods ourselves? Little Bro is a chevy man & he adjusts his lash (or whatever) with the car running, at least he did for a guy and fixed it in like 15 Mins. __________________ 88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ

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