sbc bbc hydraulic lifter??

[Terry F.]

Are small block and big block hydraulic lifters the same for GM?? Are there any that should be avoided?? I would like to find a set of NOS GM hydraulic lifters for my rebuild on my 427. Thanks, Terry

[Clem Z.]

Re: sbc bbc hydraulic lifter??

they are the same DO NOT buy for price as there are some cheap ones out there. federal mogul part #HT817 will be good ones

[Terry F.]

Re: sbc bbc hydraulic lifter??

Clem, is there any advantage to anti-pump up lifters? Do they give you more reliable valve train performance in the 6000-7000 rpm range?? Thanks, Terry

[David B.]

Re: sbc bbc hydraulic lifter??

I will defer to Clem on this, but wanted to say that I used the anti-pump up lifters on my SBC and am really impressed with the way they perform at the upper rpm levels. They wind out almost like the solid lifter engines that I remember, but none of the routine adjustments, and they are quiet. You do have to keep an eye on the tach though, as you will not get noticeable valve float at the upper end, so long as you use a good set of springs with them. I used Crane #99277-16 Hi Perf lifters and Crane 99846-16 valve springs, along with Competition Cams #1412-16 roller tipped rockers (1.52:1 ratio). They do fit under the finned valve covers with no problems, even with standard thickness gaskets. It all looks stock too : )

Dave B.

[Clem Z.]

the difference is they have a stronger retaining

snap ring holding them together so you can "zero" lash them without them coming apart. that part # is HT817R

[Terry F.]

Thanks, Terry *NM*

[Terry F.]

Re: the difference is they have a stronger retaini

I am sure this is a somewhat stupid question...zero lash? Does this mean that you set the lifter on the low point of the cam lobe and only tighten the rocker arm just untill you take the slack out of the rocker arm and no more?? As aposed to compressing the lifter with a few extra turns of the wrench once you take the initial play out of the rocker arm?? Thanks, Terry

[Terry F.]

Re: the difference is they have a stronger retaini

Clem, are you saying the HT817 is a standard replacement and the HT817R is anti-pump up style. The difference being the strength of the retainer to keep the lifter from hammering itself apart when zero lashed?

Is the proper way to adjust an anti pump to ZERO lash point?

Thanks, Terry

[Clem Z.]

correct,you can do it running by backing off

the rocker till it taps and then just tighten back down till the tapping just stops. some people set them at .002 feeler gauge clearance just to hear the sound.just like running a solid lifter on a hyd cam

[Terry F.]

Re: correct,you can do it running by backing off

What effect will there be by adjusting an anti pump up lifter like a standard lifter?? Would they bleed down rapidly. Thanks, Terry

[Clem Z.]

as far as i know that is the only difference

zero lash can be done with std hyd lifters as i have done it many times without a problem. you just have to make sure that they never get loose or it could pop out the lighter duty wire retainer.

[Clem Z.]

i have no idea as i have never tried it *NM*

[Terry F.]

Re: as far as i know that is the only difference

Sorry but now that I got-cha talking.....

So, are there 3 types of lifters: anti-pump up (adjust like standard lifter but does not pump up solid at high RPM's), standard lifters with light retainers that can come apart if you run them too loosely HT817, zero lash lifters that have heavy retainers that can be zero lashed without the worry of coming apart HT817R.

Do I sound confused enough for you. I can really mix things up when I get going.

Thanks, Terry

[Clem Z.]

as far as i know there are 2 types std and

anti pump up which is a std hyd lifter with heavy duty retainer so it can be zero lashed witout any danger of it coming apart.

[Terry F.]

Thanks Clem! *NM*