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#1
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Rocker shafrts and roller rockers
Good Morning,
Can I use stock rocker shafts (stamped rockers) with with roller rockers? With the holes in the shaft pointing down, will oil get to the top of the rocker arm? Do I need to buy different rocker shafts? Thanks Rock` |
#2
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yes, unless needle bearing type.
though some have 2 oil holes -high/low- like rocker specialties shafts. |
#3
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So how did you get the rockers minus shafts?
I should have asked, what brand? |
#4
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Rockers are El-Cheapo Proform and they came with shafts. I just have a new set of MP shafts also.
Thanks, Rock` |
#5
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stock shafts will work fine.
They just need to be new ones, as there will be a wear pattern on them, that will hurt the life of the new rockers. Install them normally with the holes down. |
#6
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Okay, I read this a few days ago and I have to ask......
What are you talking about the oil holes being pointed DOWN? Everything I've ever heard of or read says for the holes to be in the up forward position to align with the holes in the rockers. I guess I missed something in the translation. How can this be right?
If I'm wrong, you need to straighten me out. This sounds crazy as the oil holes on rockers are on the top. |
#7
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The rockers shafts only get a bleed off of oil. Not a pressurised gally.
If the holes are up, the oil doesn't go anywhere. Rocker failure in short order. They need to be down so the oil goes to the wearing surface of the rocker. I think the confusion comes in that the oil holes are not down towards the ground as such, they aim a little upward, toward the leading edge of the rocker/lifter galley. As upposed to up which would you can see the holes in the shafts, (at least with stock stamped rockers). They should not be visable. |
#8
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And if the rockers have needle bearings against the shafts, they need a hardened shaft or the shaft will fail. The surface preussure of the needles is too big for unhardened shafts. Such rockers (with needle bearings against the shafts) don't care which way the shafts are, the holes can be anywhere as long as there is oil.
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#9
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unless you want to buy new rockers and shafts...
point the oil holes down and toward exhaust.... |
#10
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Thanks for the info. You folks are always helpful. Like have my own personal advisers.
Rock` |
#11
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Why do you want rollers. They will do nothing to improve your power out put.
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#12
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[QUOTE=DJM;772298]Why do you want rollers. They will do nothing to improve your power out put./QUOTE]
I bought a set of Edelbrock aluminum heads. The instructions say "Must use adjustable valve train" for anything above stock lift. I`m running a .484 lift. There are those using stamped rockers however with lift as high as .513. I was just following the instructions. I guess ordering custom length pushrods would satisfy the adjustable valve train. Rock` |
#13
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Check lift and profile with stamped rockers. Advertised lift .484" actual as low as .458", and no match between stampings.
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#14
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I have a set of 273 rockers/shafts........
The rockers have oil holes in the tops to spray oil on the valve/rocker contacts to prevent dry friction and wear. If the holes are in the down position, the holes will not line up to allow the oil squirt to lube and cool springs and rockers. I'm not saying your wrong, but it makes no sense to me. With the oil holes down, only the rocker/shafts get oil.
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#15
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Oil pressure needs to hit the bottom of the rocker/shaft because thats where the load is!
rockers are being shoved 'up' against the shaft by the push rod/valve! The tip gets residual thats forced through the top rocker hole along with splash. And true lift from 'non mass produced' night shift type rockers is a good thing. Just think about it............ |
#16
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Thanks for the lesson.........
I've always used wire in the past to hold everything together when removed and I never studied the setup. I ASSUMED I knew how it worked and the holes don't line up no matter how I try. My thinking would oil better but would most likely put too much oil in the top of the engine. Drain back could be overtaxed my way but it still seems wrong to depend on that small of an amount of oil. After all, most of the oil will work out the sides of the rockers instead of out the oil holes on top of the rockers. Now I understand why so many people smoke the pushrods or burn the rocker tips when using the mechanical rockers.
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#17
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Not that ther is much point in arguing about this, since you have to keep the holes down with non roller rockers and there is no harm doing the same with rollerized, but I have asked a couople of manufacturers (T&D and Erson) about the oil holes and they said that with the needle bearing rockers it doesn't matter. With the Ersons you really can't even check it without disassembling, the shafts aren't marked in either. Haven't checked wether the holes in them are offset like in the stock shafts, and I have not paid attention to the oil hole directions and they have worked fine. However, like I asid in the beginning, it's propably wiser to put them "right" with all the different rockers since it will not harm anything either and the metal to metal rockers need the holes down.
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#18
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The needle bearing rockers I run have 2 hole shafts.
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#19
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Do you mean there are holes in the top and bottom? |
#20
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Yes 1 points down toward the valve and the other up toward the valve
kind of like 5 & 2 'o clock. If I'm remembering right. |
#21
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gary at rocker specialties set me up with the induction hardened 'extra oiling' shafts.
I will pull the cover and snap a pic of the ends with the pipe plugs, these things are THICK! |
#22
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The shafts in teh Ersons and T&D's only have about 3/8" oil hole through the shaft. The shaft itself is smaller diameter than stock, that is to leave more material to the rocker arm by being able to use slightly smaller needle bearings.There are sleeves on the shaft in every rocker stand position to keep the diameter stock there. At least the Ersons shafts only have one hole, but I haven't checked wether it's pointed offset like in the factory style shafts. Haven't even looked at the T&D's holes.
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