Heres another point, if Bills engine will rev this
high with just new springs. What about just replacing
the stock rockers and guides with Mopar aluminum, needle
bearing roller rockers, guides and thick .080 pushrods.
Surely the stock valve springs won't have to work as hard
as they would with friction plagued stock rockers. Would
they be capable of 6000 rpms? Who knows...
GS -
> Bill wrote:
> Where did this lifter problem story come from ? Has anyone had a engine
> problem related to them ? I have not heard of any and don't think that there
> are any atleast in drag racing applications, maybe in circle track or
> something where it would be wound 6000 or better for a extended time ? I wind
> mine to 6000 every night of drag racing since installing the comp cam and the
> MPI the power seems to be best over 5500 so I shift at 6000 both on the motor
> and on the juice and so far have not had a problem. I am using stock lifters,
> rockers and pushrods but do have the MP springs and retainers. I did some
> research before tinkering and found that the 380 HP crate engine has the same
> lifters, pushrods, rockers & ect as the stock Magnums do but do have beefier
> springs . So my theory is that Mopar wouldn't put this stuff in them engines
> if they were going to give problems. The 380 is rated at 5300 but the
> indicate in the Magnum Engines book that the torque remiains over 350 from
> 2000 to 5700. And the MP computers at least in 93 were rev limited at 6500,
> why would Mopar set it that high if the engines would not take it ? I would
> really be interested in knowing of any failures of these lifters or lifter
> related engine failures on any engines used for drag racing or any other
> purpose for that matter but I have heard of None. I know jon even tried to
> kill his engine with a over rev situation :-) but just bent a few valves and
> push rods ????
>
> Bill
>
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:54:41 EDT