I
have run into some issues trying to identify 300 C or D cam specs, I have 2 what
are claimed to be 300D cams, but have no ID beyond 3 numbers stamped poorly, near
gear , in rough part of cam casting..sound right? Any one have a C or D cam
they know is real , with description? I do not have those stamped numbers
handy. This
brings up looking in aftermarket; only 392 “in production” “listings”
seem to be Comp Thumper series, but those are hydraulic for 392. In looking
more, hot heads has a 280 cam , solid and hydraulic, from which info I ordered a
hydraulic for a non 300 392, and it turns out to be an Isky cam; Might be too
much for a letter car. One person in their parts lists had a 270 Isky
mega cam, both seem in right area, but was unsure what original MOPAR duration
was.(for 375/380 HP cam) ; I did buy that 270 cam, price was right . That started
me thinking about hi po hemi cam specs ,355 hp 354 and 390 HP 392. How hot did
Chrysler go on cams? Having been young once , I also made the mistake of
overcamming. Much over 280 is asking for it , especially with old Torque flight
converter. (stall when you push D) Without
taking sides, a modern hydraulic is probably better than a 50’s solid;
for one thing you should pick up lift due to lack of running gap, for same lift
spec, and under 6K modern hydraulics do not cause problems ; and adjustment of
solids, esp with adj pushrods, goes away, along with a big oil soaked messy
hassle.....in going through all this also found out solid lifter push rods for C
D ,probably all solid A block hemi, have 3/8 balls on both ends, hydraulics
5/16 ; on my supposedly “D” engine someone used 5/16 push rods, 5/16
hydraulic lifters with D rockers and supposedly D cam, all wrong . But
Hot Heads makes 3/8 by 5/16 pushrods ( might be adjustable but lock them) so
you could run hydraulic cam and lifters with D adjustable rockers , using Chevy
approach of one turn tight beyond clearance click. But that means set up hot
and oily. Not good. This
brings up more generally ram cam specs , long ram, and J cam specs. I had a J ,
much more cam in it than F , or so it seemed ; ----and what was in 400 HP F?- While
a lot to ask, it strikes me someone in club has all this at finger tips , maybe
a list? Note also that difference in duration between advertised lift and lift
at .050 duration in this range is about 50 degrees ; so a 280 is about 230 at
.05. Comments
welcome ; it would be good for all of us to know this data; and then comes how
to tell what cam is what. . Also
does anyone know a simple way to tell hydraulic from solid grinds? I know it
can be done at cam manufacturer by some kind of cam plotter they have , which
would show accell ramps on solids before main lift event . Maybe dial indicator
on lifter in partially assembled engine, and plot it ? This problem will get
worse, due to parts hoards with no real history, and now they are very old
piles indeed. Thank
you,--as I say comments welcome. John
Grady __._,_.___ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang
Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required) Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe __,_._,___ |