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Re: Ongoing pushrod cup oiling problem.
[Re: fast68plymouth]
#858629
11/23/10 01:53 AM
11/23/10 01:53 AM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
OP
master
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OP
master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Well I started from scratch to see how much oil is coming to the up. I started with the drivers side as that is the side that has had more problems with cup issues. I modified the oiling passages on both rockers on #1 so I could see if cutting passages would help with oiling. Brought the crank around till the driver side was oiling. The modified rockers have 4-5 more times of oil coming from them than the rest. Volume doesnt seem to be the problem, motor is getting plenty of oil to the top. Now here is where I dont have a clue. On both rockers that I modified, oil was pouring out the back of the rocker, but none of it was hitting the cup. I took the pushrod out and shortened the adjuster till there was almost nothing hanging out to see if the adjuster would ever catch any oil. It never caught a drop. But, can you tell from just priming it if the cup will really receive oil when running?  Opinions?? The non modified rockers just drip oil out the back...not much coming from them.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Ongoing pushrod cup oiling problem.
[Re: Biginchmopar]
#858631
11/23/10 03:00 AM
11/23/10 03:00 AM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
I hate to be the one that breaks the news to you but the pushrods will never live with cups if you run valve spring pressures over 500lbs open.
I'm sure there are plenty of people on this board who run cup-style pushrods at higher spring pressure than that w/o issues. I don't think it's that cut-and-dry of a solution.
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Re: Ongoing pushrod cup oiling problem.
[Re: HEMIFRED]
#858634
11/23/10 04:29 AM
11/23/10 04:29 AM
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Joined: Sep 2009
Posts: 1,805
ky hills
thehemikid
top fuel
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top fuel
Joined: Sep 2009
Posts: 1,805
ky hills
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...Fwiw ...6yrs on the street with a small .575 roller. The last 2yrs were with the 1.6 H/S rocker's & the same P/rods & cups.
...Mine was light duty compared to the big rollers, but I had no cup/ball problems even though the rods got cut a little short.
Last edited by thehemikid; 11/23/10 04:42 AM.
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Re: Ongoing pushrod cup oiling problem.
[Re: Biginchmopar]
#858639
11/24/10 01:19 AM
11/24/10 01:19 AM
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Joined: Oct 2005
Posts: 8,872
Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,872
Ontario, Canada
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Quote:
Run cup pushrod on a roller cam motor and it will not live.
Well here's a dilemma ... if you don't run a cup and you don't use pushrod oiling, then there is no way to effectively lube that point. With a cup, gravity takes care of it.
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