are these retro fit roller lifters - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-05-2006, 02:54 PM
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are these retro fit roller lifters

hi a guy sells these locally over here and he dont
know much about them these were removed from a big block

my question is are these retro fit roller rockers.

thanks
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Old 12-05-2006, 02:58 PM
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yes they are!

K
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Old 12-05-2006, 03:02 PM
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thanks for that fast reply

so if i can get them for a nice price i can make my bbc a roller block
ok i need more parts i know .
but my engine is in a rebuild process.

do i need to change any ting to the lifter bores

thanks
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Old 12-05-2006, 03:11 PM
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they should be a drop-in unit, but you should check with the manufacturer first. Normal, factory roller lifters generally have a yolk between the lifter pairs (looks like a double ended wrench) which holds the lifters from turning, and then a spider that bolts to the lifter valley with arms to hold each of the 8 yolks down. The bar you see connecting each pair of lifters does away with both of those.

Roller cam will cost you a bit more money in the department of valve gear, but not a whole lot if your RPM expectations aren't nutty (which in a big block I wouldn't assume they would be). The mass added by the heavy roller units on those lifters create a potential for valve float (not sure how much of this you already have figured out).

Last, but not least, you need to make sure those roller units are in good shape. Theoretically the units should really never wear (which is one of the points of having a roller cam to begin with) but it is possible that the motor was not oiled well or that the motor was revved and valve float had the lifters slapping against the cam (which damages the roller bearings). The last thing you want is to save 200 dollars on a valve train and a month later have roller lifter needle bearings all through your journals!

Hope that's enough info to help-

K
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Old 12-05-2006, 03:55 PM
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Big block Chevies have canted lifter bores. They are not in a straight line. That means that the tie bar has a bend in it. The tie bars in the pictures look to be straight.
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Old 12-05-2006, 03:56 PM
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Are those hydraulics? They look like old style solid lifter rollers from the pictures.
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Old 12-05-2006, 06:15 PM
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Yep those look like SBC not BBC...

But if you would give a better angle shot I may say different...? Just hard to tell from the pic...

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Old 12-06-2006, 12:43 AM
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Quote:
Originally Posted by yekoms
Big block Chevies have canted lifter bores. They are not in a straight line. That means that the tie bar has a bend in it. The tie bars in the pictures look to be straight.

this is what BBC lifters look like notice the bend in the bar
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Old 12-06-2006, 03:14 AM
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are these retro fit roller lifters

Those definetly dont look like big block parts,and something else to consider is that roller lifters are not something you should buy used.After time the needle bearings get flattened out and this will cause the lifters to eventually explode,and as pointed out,you dont want to be pulling your motor out to pick out all the little pieces!Been there,Done that!!
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