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vertical lifter bars #1286051
08/15/12 10:43 PM
08/15/12 10:43 PM
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bigbee Offline OP
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I have a problem where it looks like all I can do is bush the lifters in order to keep the pushrod oiling hole covered at high lift. I've checked with Isky, Crower and Jesel and they all place this oiling hole too high and it comes out of my bore at high lift.

Now when I bush the lifters (taller lifter deck), the tie bar will hit under the block deck on my Hemi and prevents installation. I might be able to install them if the lifter bars were "removeable"

I have seen in Isky and Crower catalog that they have "captive" lifter bars. Earlier they used "removeable" lifter bars.

Was there a service problem with the removable lifter bars? They both call the "captive" lifter bars an upgrade.

Re: vertical lifter bars [Re: bigbee] #1286052
08/15/12 11:33 PM
08/15/12 11:33 PM
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Romeo MI
MR_P_BODY Offline
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Cut the base circle lower on the cam

Re: vertical lifter bars [Re: MR_P_BODY] #1286053
08/15/12 11:43 PM
08/15/12 11:43 PM
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NW Indiana
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fbs63 Offline
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Some of the lifter manufacturers make .300 tall lifters for this reason.

7337046-MyCar.jpg (56 downloads)
Re: vertical lifter bars [Re: MR_P_BODY] #1286054
08/15/12 11:48 PM
08/15/12 11:48 PM
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bigbee Offline OP
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I assume you mean to cut the overall profile with a lower base circle. Same lift duration, etc. Is it expensive to have a cam recut?

Will the ramp profiles work the same?

Re: vertical lifter bars [Re: fbs63] #1286055
08/15/12 11:52 PM
08/15/12 11:52 PM
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bigbee Offline OP
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What do you mean by .300 tall lifters? They are too tall now. I don't understand.

Re: vertical lifter bars [Re: bigbee] #1286056
08/16/12 12:01 AM
08/16/12 12:01 AM
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Ontario, Canada
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Stanton Offline
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Why are you worried about uncovering the hole ??? Uncovering the hole momentarily will only stop flow up the pushrod, nothing more. I sure hope you're not losing sleep over these lifter dilemma's !!

Re: vertical lifter bars [Re: bigbee] #1286057
08/16/12 12:02 AM
08/16/12 12:02 AM
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Romeo MI
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Quote:

I assume you mean to cut the overall profile with a lower base circle. Same lift duration, etc. Is it expensive to have a cam recut?

Will the ramp profiles work the same?




They can cut your cam as is on a smaller base... it
just drops the lifter lower... how much d you need
to drop.... its about $125... I just called on this
last week


Re: vertical lifter bars [Re: bigbee] #1286058
08/16/12 12:04 AM
08/16/12 12:04 AM
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Stanton Offline
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Why are you the only person with this problem ?!?!

Re: vertical lifter bars [Re: MR_P_BODY] #1286059
08/16/12 12:08 AM
08/16/12 12:08 AM
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bigbee Offline OP
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Thanks Mr. P. I'll check into it.

Do you happen to know if there were problems with the removable lifter bars vs the captive tie bars? I'll call on this as well, but looking for your advice.

Thanks.

Re: vertical lifter bars [Re: Stanton] #1286060
08/16/12 12:39 AM
08/16/12 12:39 AM
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bigbee Offline OP
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Hi Stanton.

After my lifter delimas there will be many others, I'm sure.

I'm asking about the pushrod oiling hole. Everybody else seems to think it is enough to bush the lifters. That is Crower, Isky and Jesel. I don't want to goop up with 50 wt. since I kept my other clearances relatively tight. Big springs need cooling up top and I want enough oil.

Tell me more about why I should not worry about losing pressure momentarily, actually draining the pushrod? I don't know. Why does the factory keep these holes covered at high lift?

Re: vertical lifter bars [Re: bigbee] #1286061
08/16/12 12:44 AM
08/16/12 12:44 AM
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Romeo MI
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Quote:

Thanks Mr. P. I'll check into it.

Do you happen to know if there were problems with the removable lifter bars vs the captive tie bars? I'll call on this as well, but looking for your advice.

Thanks.




Between the 2 styles of bars I didnt see them at a
different height.... but I'm not talking BB on this
so I cant say for fact on the BB ones... but I doubt
they are at different heights

Re: vertical lifter bars [Re: MR_P_BODY] #1286062
08/16/12 01:04 AM
08/16/12 01:04 AM
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bigbee Offline OP
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I was thinking that I could install both lifters without the tie bar and then lift one up high enough to put them both into the slots. Once down on the cam they are OK. No?

I agree they might both be the same height.

By the way, do you think I am concerned about nothing? Will I lose oil up top if the oil hole is exposed? The oil band is also exposed which would seem to cause pumping of the oil out of the band. This is why I thought I needed to bush the lifters.

Re: vertical lifter bars [Re: bigbee] #1286063
08/16/12 01:13 AM
08/16/12 01:13 AM
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Quote:

I was thinking that I could install both lifters without the tie bar and then lift one up high enough to put them both into the slots. Once down on the cam they are OK. No?

I agree they might both be the same height.

By the way, do you think I am concerned about nothing? Will I lose oil up top if the oil hole is exposed? The oil band is also exposed which would seem to cause pumping of the oil out of the band. This is why I thought I needed to bush the lifters.




I have never seen a lifter where you could put the
bar on if its not about 90* and yes if the oil band
is exposed you will most likely have a oil pressure
drop... if the lifter bore is sloppy it will make it
all the worse

Re: vertical lifter bars [Re: MR_P_BODY] #1286064
08/16/12 02:21 AM
08/16/12 02:21 AM
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bigbee Offline OP
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I haven't actually used the removeable bar lifters either. The ones that I have looked at in the Isky and Crower catalogs appear to have a slot extended from the primary bore of the bar to its end. I think this would let the bar install at any angle. I'm thinking you would need to tilt the bar far enough to engage the slot and then when dropping both the lifters far enough to their bores the bar would be engaged. Know what I mean?

Back to my earlier comment about exposing the pushrod lifter hole. Is the very momentary exposure at max lift going to lose enough oil (not engine oil pressure) to introduce air and reduce oiling effectiveness to critical areas? Such as rocker bearings, valve ends, roller rocker tips? It's my current thoughts that I could reduce the oiling up top with restrictor pushrods, but no easy way to increase oiling if I the problem is at the lifter. That is why I want to fix the exposed oil hole problem. Too much worry?

Re: vertical lifter bars [Re: bigbee] #1286065
08/16/12 06:58 PM
08/16/12 06:58 PM
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Stanton Offline
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Quote:

Tell me more about why I should not worry about losing pressure momentarily, actually draining the pushrod? I don't know. Why does the factory keep these holes covered at high lift?




The contact points will be well lubed and continue to be right up till the moment the hole becomes exposed. The contact points will then ride the cushion of oil. In the absolute fraction of a second that the holes are exposed drainback would be virtually unmeasureable.







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