Re: Stock 440 pushrods question
[Re: markrr]
#1458745
06/27/13 12:09 AM
06/27/13 12:09 AM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
top fuel
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top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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No difference. They should be the same length.
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: Stock 440 pushrods question
[Re: Cab_Burge]
#1458748
06/27/13 07:41 AM
06/27/13 07:41 AM
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Joined: Jan 2003
Posts: 21,072
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
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That and the early rods are longer.When I got my 66 440 it had a bent push rod.Got one from the dealer.This was in 69.It was way too short.Back to the dealer and the old parts guy was there.Showed him the bent one and the new one.Bent was longer than what I got.He says I know what you need.Walks in and gets me a 66 67 Push rod.It was longer than the 68.This was just a basic stock rebuild.Rocky
Chrysler Firepower
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Re: Stock 440 pushrods question
[Re: 1968RR]
#1458749
06/27/13 10:05 AM
06/27/13 10:05 AM
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Joined: Aug 2012
Posts: 1,574
Lakeland FL
floridian
pro stock
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pro stock
Joined: Aug 2012
Posts: 1,574
Lakeland FL
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Quote:
No difference. They should be the same length.
This answer is why you really have to watch who you take info from this site..
You can use 68 and newer on all 440's but you must change the LIFTERS and the PUSHRODS to the 68 and newer design... 67 and older were different.....
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Re: Stock 440 pushrods question
[Re: bobs66440]
#1458752
06/27/13 02:19 PM
06/27/13 02:19 PM
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Joined: Jan 2003
Posts: 75,005
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,005
U.S.S.A.
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Quote:
In any case, you should check the lifter pre-load. It's possible the stock length push rods won't work anyway and you'll have to have custom ones made...unless you're using adjustable rockers...
You are correct on telling him to check for proper preload and length but adjustable rockers also need to have the correct type and length pushrods. You don't want too many threads showing under the rocker to make up for pushrods that are too short.
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Re: Stock 440 pushrods question
[Re: JohnRR]
#1458753
06/27/13 04:20 PM
06/27/13 04:20 PM
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Joined: Apr 2004
Posts: 965
S.W. Pennsylvania
markrr
OP
super stock
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OP
super stock
Joined: Apr 2004
Posts: 965
S.W. Pennsylvania
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Thanks everyone. I figured the '67's pushrods were different than '68 and newer but wasn't sure. Compcams lists a different lifter for the '67 440's. I called Compcams and their tech told me the difference in lifters was due to how the oil flowed through the pushrods up to the rocker arms.  Nice, huh.
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Re: Stock 440 pushrods question
[Re: JohnRR]
#1458754
06/27/13 04:24 PM
06/27/13 04:24 PM
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Joined: Apr 2004
Posts: 965
S.W. Pennsylvania
markrr
OP
super stock
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OP
super stock
Joined: Apr 2004
Posts: 965
S.W. Pennsylvania
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Quote:
Quote:
In any case, you should check the lifter pre-load. It's possible the stock length push rods won't work anyway and you'll have to have custom ones made...unless you're using adjustable rockers...
You are correct on telling him to check for proper preload and length but adjustable rockers also need to have the correct type and length pushrods. You don't want too many threads showing under the rocker to make up for pushrods that are too short.
I will be measuring my lifter preload and I do not have adjustable rockers. Before measuring preload should I pump up the lifters in a container of oil before setting them into the motor?
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Re: Stock 440 pushrods question
[Re: Cab_Burge]
#1458757
06/27/13 07:43 PM
06/27/13 07:43 PM
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Joined: Sep 2006
Posts: 1,139
West Tennessee
rbstroker
super stock
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super stock
Joined: Sep 2006
Posts: 1,139
West Tennessee
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The real difference is in lifters which of course require different pushrods. Using 69 up lifters will allow all early RB engines to use later pushrods. If you are using an aftermarket cam, you'll undoubtedly use later (69 up) lifters allowing later pushrods.
This is the land of the free
because of the brave
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Re: Stock 440 pushrods question
[Re: floridian]
#1458759
06/28/13 09:32 AM
06/28/13 09:32 AM
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Joined: Jan 2003
Posts: 21,072
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
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I ran a .500 lift Isky hyd cam for years in my 440.Used the stock rockers and push rods.Never had any problems.That was back in late 60s early 70s.Sig Erson came out with adjustable rockers so I bought a set.Now they are still in use with Crane 3/8 alloy push rods.Rocky
Chrysler Firepower
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Re: Stock 440 pushrods question
[Re: Cab_Burge]
#1458761
06/28/13 11:03 PM
06/28/13 11:03 PM
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Joined: Apr 2004
Posts: 965
S.W. Pennsylvania
markrr
OP
super stock
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OP
super stock
Joined: Apr 2004
Posts: 965
S.W. Pennsylvania
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Quote:
Quote:
Should preload be between .020" and .030"?
 I have used .015(1/4 turn on adjustable rockers with 3/8x24 thread adjusters) to .045(3/4 turn) hot with no noticeable differences at the track or on the engine dyno, any more slow the car down as did looser 
So then there is a wide range that the preload can be.
If the preload is too much or not enought would it cause a ticking sound?
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1/4 inch ball on the lifter side 
The later ones are 5/16 on both ends, do not put the 1/4 inch lifter end in the rocker arm 
It will push through in about 300 to 500 miles, don't ask me how I know that 
