|
Re: Which is better ball cup or ball ball pushrods and why?
[Re: Porter67]
#1675459
09/21/14 11:30 PM
09/21/14 11:30 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Maybe im stuck in the past using ball/cup pushrods but I see many use ball/ball.
Which is better? Or better yet what applications would one use one type vs the other?
I've been using ball and ball for 12+ years now..
if you look at the BEST rockers out there, they use
ball and ball
|
|
|
Re: Which is better ball cup or ball ball pushrods and why?
[Re: B G Racing]
#1675465
09/22/14 10:03 AM
09/22/14 10:03 AM
|
Joined: Jun 2014
Posts: 5,183
Porter67
OP
master
|
OP
master
Joined: Jun 2014
Posts: 5,183
|
Yes BG I have found that out the hard way many years ago, some of the cheaper off the shelf pushrods have the thick cup that does cause issues with some rockers. I use Smith Brothers just for that reason as there cup material is not near as thick and cause less problems. I think its time I try to make the move to the ball ball in the future since it seems its become more the standard. I have been resisting going to the ball/ball mainly due to the lack of info and its hard to change when one gets older to newer trends. I have a few modern motors yet to build and they are both Ball/Ball the R5/P7 is and I don't recall what the older my older Aries 8.3 tractor pulling motor has in them, I think ball cup as its semi old. Early-mid 80-s I think. Thanks everyone for the input.  Thumper, I think you have a extremely well running motor combo and its proof of what well matched parts can do and last a long time.
|
|
|
Re: Which is better ball cup or ball ball pushrods and why?
[Re: Cab_Burge]
#1675471
09/22/14 02:29 PM
09/22/14 02:29 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
On T&D single shaft rockers the pushrod length(+ or - .090) is very critical due to the oil slot in the adjusters for the ball end pushrods   Not so much on all the single shaft Harland Sharp, Crane and all the rest of the ball and cup rockers I've used  They can be within .150 of perfect and still work well
Cab.. thats a lot to play with... if a person cant
get the length right.. within .020 or so then they
need help doing it
|
|
|
Re: Which is better ball cup or ball ball pushrods and why?
[Re: Monte_Smith]
#1675473
09/22/14 03:45 PM
09/22/14 03:45 PM
|
Joined: Oct 2006
Posts: 596
Mass.
80fbody
mopar
|
mopar
Joined: Oct 2006
Posts: 596
Mass.
|
Quote:
I wouldn't say one or the other is BETTER, just depends on the quality of parts used. I mostly use ball/ball but just put a set of "cup" pushrods in an 865" motor. Now of course those pushrods are so big, that basically the "cup" is machined into the pushrod, but it is still the same thing.
Now I will say, that in the case of a standard 3/8 pushrod deal, I prefer ball/ball because the pushrods are one piece and you can get them in .180 wall. That is a STOUT 3/8 pushrod, plus places like Comp and others keep them in stock at virtually any length you need in .050 increments
Monte
Thanks Monte. That's good info. Ordering pushrods is coming up next on my list.
|
|
|
Re: Which is better ball cup or ball ball pushrods and why?
[Re: BradH]
#1675476
09/22/14 05:50 PM
09/22/14 05:50 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
One thing with big lift and ball/cup is you need the 120* radius which makes for a skinnier area right behind the ball and if you get a bit farther out past the rocker body you start side loading a lot more on the ball section and usually when you have big lift the spring pressure is up there
|
|
|
|
|
