Re: What cam would I have used in the 70's
[Re: lostdog]
#2551159
09/17/18 05:41 PM
09/17/18 05:41 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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In 1981 when I was building my first 440, I bought a Crower Monarch 280H for $66.
280/280 advertised, 224/224@.050, 110lsa, 460/460 lift.
That was a decent little cam.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: What cam would I have used in the 70's
[Re: fast68plymouth]
#2551182
09/17/18 06:12 PM
09/17/18 06:12 PM
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Joined: Jun 2008
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lewtot184
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usa
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In 1981 when I was building my first 440, I bought a Crower Monarch 280H for $66.
280/280 advertised, 224/224@.050, 110lsa, 460/460 lift.
That was a decent little cam. my first performance cam was a crower 201hj; 284/.480. best running little street cam I put in my 383 road chicken.
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Re: What cam would I have used in the 70's
[Re: lewtot184]
#2551268
09/17/18 09:30 PM
09/17/18 09:30 PM
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Joined: Feb 2005
Posts: 4,318 Prospect, PA
BSB67
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the isky 1012b was the '64 s/s wedge race cam; 320 degrees duration, .520 lift, 108lsa, a lot of cam. the 1012b was superseded by the racer brown stx series; stx21, 22, & 23. the ssh25 and 284-.484 are identical for all practical purposes. the real issue may be how much head modifications your willing to do to run a high lift cam. there are 114lsa versions of the 284-.484 and 292-.509. in my opinion, none of the above. The "hemi grind" was available through all of the 70s. It had 284°/284°, 0.465" lift and 60° OL. I don't know when the rest of the "purple shaft" DC cams came out, but in 1976 Ma Mopar was still recommending the Racer Brown SSH25 and SSH44 hydraulic cams. I tried one of each before I went to a Crower solid. My buddy was running the mini-express with mushroom tappets. That thing was Bad Azzzz.
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Re: What cam would I have used in the 70's
[Re: lostdog]
#2551280
09/17/18 09:59 PM
09/17/18 09:59 PM
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Joined: Jan 2003
Posts: 15,552 Norwich CT USA
moparts
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the mini-express with mushroom tappets Yes the MP Mushroom cam and Lifter .690 lift With Speed Pro 11.5 (Boat Anchor - Heavy) pistons on Sunoco 97 or Shell 95.5 gas
Tom ,
2011 Ram 3500 C&C Diesel 2009 Challenger R/T 1971 Challenger Conv. 511/4 speed 1970 Challenger R/T 503/727
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Re: What cam would I have used in the 70's
[Re: BSB67]
#2551301
09/17/18 10:54 PM
09/17/18 10:54 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
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the isky 1012b was the '64 s/s wedge race cam; 320 degrees duration, .520 lift, 108lsa, a lot of cam. the 1012b was superseded by the racer brown stx series; stx21, 22, & 23. the ssh25 and 284-.484 are identical for all practical purposes. the real issue may be how much head modifications your willing to do to run a high lift cam. there are 114lsa versions of the 284-.484 and 292-.509. in my opinion, none of the above. The "hemi grind" was available through all of the 70s. It had 284°/284°, 0.465" lift and 60° OL. I don't know when the rest of the "purple shaft" DC cams came out, but in 1976 Ma Mopar was still recommending the Racer Brown SSH25 and SSH44 hydraulic cams. I tried one of each before I went to a Crower solid. My buddy was running the mini-express with mushroom tappets. That thing was Bad Azzzz. I think when racer brown died and the business changed mopar changed.
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Re: What cam would I have used in the 70's
[Re: moparts]
#2551311
09/17/18 11:14 PM
09/17/18 11:14 PM
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Joined: Apr 2006
Posts: 4,220 West Plains, MO
DrCharles
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the mini-express with mushroom tappets Yes the MP Mushroom cam and Lifter .690 lift With Speed Pro 11.5 (Boat Anchor - Heavy) pistons on Sunoco 97 or Shell 95.5 gas There are actually two Mini-Express mushroom cams, the 316 duration (278 @ .050) with .654 gross lift, and the bigger one 328 adv. (don't know the .050) with .690 lift. My '82 D.C. book says the .690 "loses some low speed torque"... I built my 451 around the smaller one. Reground to restore lobe taper and now .652 and 272 @ .050. Has a really nasty idle, 6-7" Hg at 1000-1100 rpm. Should be fun once I get the A-body reassembled this fall
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Re: What cam would I have used in the 70's
[Re: lostdog]
#2551470
09/18/18 12:36 PM
09/18/18 12:36 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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On my list of “1000 things I’d like to test on the dyno(that will likely never happen)” would be a cam shootout between the old racer brown/DC grinds(ssh-25 and ssh-44)including the hemi grind, vs the updated MP 280, 284, 292 cams, vs the old school Comp 280, 286, 296 Magnum cams, vs the newer Comp Purple Plus 280, 284, 292 cams. Then toss in some “fast rate stuff”... the Comp XE/HL 275, 285, 295 to see how it all compares.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: What cam would I have used in the 70's
[Re: fast68plymouth]
#2551566
09/18/18 04:32 PM
09/18/18 04:32 PM
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Joined: Jan 2003
Posts: 4,758 Moved to N.E. Tennessee
GomangoCuda
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On my list of “1000 things I’d like to test on the dyno(that will likely never happen)” would be a cam shootout between the old racer brown/DC grinds(ssh-25 and ssh-44)including the hemi grind, vs the updated MP 280, 284, 292 cams, vs the old school Comp 280, 286, 296 Magnum cams, vs the newer Comp Purple Plus 280, 284, 292 cams. Then toss in some “fast rate stuff”... the Comp XE/HL 275, 285, 295 to see how it all compares. Wow, 15 cam changes! Don't forget to degree them all.
In theory, there is no difference between theory and practice. In practice, there is.
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Re: What cam would I have used in the 70's
[Re: fast68plymouth]
#2551677
09/18/18 09:45 PM
09/18/18 09:45 PM
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Joined: Feb 2005
Posts: 4,318 Prospect, PA
BSB67
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master
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Prospect, PA
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On my list of “1000 things I’d like to test on the dyno(that will likely never happen)” would be a cam shootout between the old racer brown/DC grinds(ssh-25 and ssh-44)including the hemi grind, vs the updated MP 280, 284, 292 cams, vs the old school Comp 280, 286, 296 Magnum cams, vs the newer Comp Purple Plus 280, 284, 292 cams. Then toss in some “fast rate stuff”... the Comp XE/HL 275, 285, 295 to see how it all compares. If you were to guess, what do you think you'd discover?
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Re: What cam would I have used in the 70's
[Re: lostdog]
#2552044
09/19/18 07:38 PM
09/19/18 07:38 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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Tested on a motor combo good enough to exploit the faster rate cams, and all cams tested using lifters with similar bleed rates, I would expect the faster rate cams to make more power than their slower counterparts........ up to the limiting rpm of the lifters.
Aside from the peak power numbers, I’d be interested in seeing how much higher(if any) the older profiles would rev before the valvetrain got unhappy.
Another test along those lines I think might be revealing would be to try and find some lifters with a nice slow bleed rate, then sort through a tray or so of new stock replacement lifters, find the 32 with the highest bleed rate......... then test the slowest bleed rate vs the fastest bleed rate on the cam that ran into stability problems at the lowest rpm...... and the one that revved the highest before getting unhappy.
The 440 I bought for a core in 1981 had a pretty new DC 292/510 cam in it..... the ssh-44.
I put it in a box, but installed it years later..... actually a couple different times. The last time was when I was selling my old 448. I seem to recall it not having any problems turning 6500rpm on the dyno with springs set up at 125/325 and stamped rockers.
That was probably close to 20 years ago now.......... and I’m pretty sure it’s the last time I had a hyd cammed BB Mopar rev that high.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: What cam would I have used in the 70's
[Re: lostdog]
#2552247
09/20/18 11:07 AM
09/20/18 11:07 AM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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Russ, by the “new” hemi grind...... you mean the 280/.474-110?
I never tried one of those. Seems like there was some deal where it came without lifters, and by the time you bought the lifters the cost ended up being quite a bit more than a 484 or 509 cam & lifter kit.
If I stumbled across a NIB one now I might pick it up if the price was right.
Fundamentally I like solids so much better it’s unlikely I’d ever use it in one of my own motors though.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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