Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: A/MP]
#2589680
12/10/18 01:02 AM
12/10/18 01:02 AM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,531
So. Burlington, Vt.
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Not exactly sure what you’re asking....... but yes, an appropriately sized roller cam would make more power than your stock lift cheater cam.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: A/MP]
#2589781
12/10/18 12:48 PM
12/10/18 12:48 PM
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crabman173
Unregistered
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crabman173
Unregistered
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The older I get ( now 61) the more I see it Compression is king and essential--ya got that everything else falls into place Low lift flow--no worry--with a sharp valve job it is still capable of making good HP Stocker cams? Death to valve trains only use when running class and you Must
Racing? Rollers are best but on a Mopar bracket barge a FT is soo much cheaper and with those heads just as good IMO
Good luck and remember--Have Fun
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: A/MP]
#2589786
12/10/18 01:01 PM
12/10/18 01:01 PM
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Joined: Feb 2005
Posts: 20,272 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,272
PA.
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Take a look back at the builds we did 30-40 years ago with junk parts that ran better than many of the builds guys are doing now with way better parts. Junk heads NEEDED high compression, and HUGE cams, and lots of fuel.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: pittsburghracer]
#2589930
12/10/18 05:30 PM
12/10/18 05:30 PM
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Joined: Feb 2007
Posts: 2,578 sweden
1Fast340
master
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master
Joined: Feb 2007
Posts: 2,578
sweden
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Take a look back at the builds we did 30-40 years ago with junk parts that ran better than many of the builds guys are doing now with way better parts. Junk heads NEEDED high compression, and HUGE cams, and lots of fuel. I also somehow get the impression that those cams where big enough to get away with stupid compression even on pumpfuel in ways that most would never even try today.
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: 1Fast340]
#2589938
12/10/18 05:45 PM
12/10/18 05:45 PM
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Joined: Feb 2005
Posts: 20,272 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,272
PA.
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Take a look back at the builds we did 30-40 years ago with junk parts that ran better than many of the builds guys are doing now with way better parts. Junk heads NEEDED high compression, and HUGE cams, and lots of fuel. I also somehow get the impression that those cams where big enough to get away with stupid compression even on pumpfuel in ways that most would never even try today. I ran Cam 2 back then and honestly can’t remember what the octane was listed at. I know it wasn’t anything like guys are running now.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: A/MP]
#2590058
12/10/18 09:19 PM
12/10/18 09:19 PM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,219
New York
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One reason why high static CR worked is because with the poor port flow the cylinder was never full at high RPM. Delayed intake valve closure as a tuning aid to modify CR is a bad idea.
Boffin Emeritus
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: Cab_Burge]
#2590131
12/10/18 11:37 PM
12/10/18 11:37 PM
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Joined: May 2015
Posts: 1,134 Lost in Time
Iowan
super stock
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super stock
Joined: May 2015
Posts: 1,134
Lost in Time
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Some thing to think about on peak flow versus maximum lift, it you buy and use a cam the has .600 lift won't the motor flow more air at .500 twice than only at .500 lift max, if the flow slows down above .500 but it is still flowing more air up until the valve reaches .500 again when it is closing ,right More air and fuel equals more power, correct I heard this thirty years ago and still think it's true. I do believe that's why the 590 cam sold for so long. And with the crappy heads and high compression goes big duration.
Have a great day Iowan
"obsolete is neat"
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: Iowan]
#2590141
12/10/18 11:55 PM
12/10/18 11:55 PM
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Joined: Feb 2005
Posts: 20,272 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,272
PA.
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Some thing to think about on peak flow versus maximum lift, it you buy and use a cam the has .600 lift won't the motor flow more air at .500 twice than only at .500 lift max, if the flow slows down above .500 but it is still flowing more air up until the valve reaches .500 again when it is closing ,right More air and fuel equals more power, correct I heard this thirty years ago and still think it's true. I do believe that's why the 590 cam sold for so long. And with the crappy heads and high compression goes big duration. Heck the old 750 lift roller cams were 332 duration.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: DrCharles]
#2590166
12/11/18 12:58 AM
12/11/18 12:58 AM
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Joined: Feb 2005
Posts: 982 western pennsylvania
b1dartsport
super stock
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super stock
Joined: Feb 2005
Posts: 982
western pennsylvania
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Heck the old 750 lift roller cams were 332 duration. Seat to seat, anyway... I think the .750 roller (R286/500) was 286 @.050 which is still a lot of duration. Ran that cam back in the day in our Max Wedge SS/DA car. At the end of each season we had a large box full of broken battleship springs and rocker arms. But man that sucker would run!
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: b1dartsport]
#2590183
12/11/18 01:16 AM
12/11/18 01:16 AM
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Joined: Feb 2005
Posts: 20,272 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,272
PA.
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Heck the old 750 lift roller cams were 332 duration. Seat to seat, anyway... I think the .750 roller (R286/500) was 286 @.050 which is still a lot of duration. Ran that cam back in the day in our Max Wedge SS/DA car. At the end of each season we had a large box full of broken battleship springs and rocker arms. But man that sucker would run! I still have two of them on my shelf. One should be sent out for a regrind as I had a lifter go bad.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: ROLLER CAM LOW LIFT FLOW HEADS
[Re: A/MP]
#2590332
12/11/18 01:08 PM
12/11/18 01:08 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,531
So. Burlington, Vt.
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Back when my buddy first started racing in Stock, and we were barely under the index....... finding our way........ on about the 5th cam, which was the worst one up to that point...... we thought, maybe we’re looking at the wrong area. Maybe the cam isn’t going to unleash any magic for us. Since the one in the motor at that point was clearly the worst we had run so far(it was one of those that came from a cam grinder who was supposed to be “good with Pontiac’s”, based on a recommendation from another racer)........we decided to just stick the small UD solid lifter street/strip cam that was in the motor when it was still a street/strip car, and just see what happens. Well, about 4 tenths and 5mph is what happened........ so we continued on our search for a better cheater cam when we saw how much difference the cam could make.
I basically agree with crabman here......... put a nice solid in it and run it.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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