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Comp Pro Magnum rockers ? #694037
05/10/10 03:48 PM 05/10/10 03:48 PM
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate Offline OP
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Mt. Eden Ky.
I have read about these rockers being a problem with bigger cams and higher spring pressures. Is anyone using them with a milder hydraulic or solid lifter FT cam?
The cam I am going to use is a Comp Cams XE284.
I have these mocked up and ready to use, but I am having concerns. I really don't want to spend the bucks to have them bushed if I don't have to.

Thanks,
Mark


1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
Re: Comp Pro Magnum rockers ? [Re: Hemi Allstate] #694038
05/10/10 03:50 PM 05/10/10 03:50 PM
Joined: Jan 2003
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Oregon
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AndyF Offline
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Oregon
They should be fine with a flat tappet cam. The new rocker arms from Comp are bushed so evidently the engineers decided to make the switch.
Re: Comp Pro Magnum rockers ? [Re: Hemi Allstate] #694039
05/10/10 03:50 PM 05/10/10 03:50 PM
Joined: Jul 2004
Posts: 19,317
State of confusion
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Thumperdart Offline
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I ran em for 5+ years w/a solid cam and had zero issues and as far as I know, they`re still going strong.

Last edited by Thumperdart; 05/13/10 01:44 PM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Comp Pro Magnum rockers ? [Re: AndyF] #694040
05/10/10 04:01 PM 05/10/10 04:01 PM
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate Offline OP
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Quote:

They should be fine with a flat tappet cam. The new rocker arms from Comp are bushed so evidently the engineers decided to make the switch.



Thanks Andy,
BTW I bought your book and I am enjoying reading it.

Mark


1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
Re: Comp Pro Magnum rockers ? [Re: Thumperdart] #694041
05/10/10 04:03 PM 05/10/10 04:03 PM
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate Offline OP
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Quote:

I ram em for 5+ years w/a solid cam and had zero issues and as far as I know, they`re still going strong.



Thanks Thumper,
How big of a solid cam did you use with these rockers?
This is a 470 inch BTW. A lot tammer than yours though!

Mark


1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
Re: Comp Pro Magnum rockers ? [Re: Hemi Allstate] #694042
05/10/10 04:31 PM 05/10/10 04:31 PM
Joined: Jul 2004
Posts: 19,317
State of confusion
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Thumperdart Offline
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The cam was a solid Isky w/.590-.605 lift and the dur. was somewhere around 260 @.050 I think.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Comp Pro Magnum rockers ? [Re: Thumperdart] #694043
05/10/10 04:55 PM 05/10/10 04:55 PM
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate Offline OP
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Quote:

The cam was a solid Isky w/.590-.605 lift and the dur. was somewhere around 260 @.050 I think.



Well that sounds reassuring! Leaves a lot of room to grow!

Thanks,
Mark


1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
Re: Comp Pro Magnum rockers ? [Re: Hemi Allstate] #694044
05/10/10 05:19 PM 05/10/10 05:19 PM
Joined: May 2005
Posts: 84
NC
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Badfish67 Offline
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Let me tell you about my issues with the Pro Magnum rockers.
I had them on my small block with a .670 lift solid roller cam and 260ish seat pressure. The rockers galled the shafts and from that I bent a few valves. The rockers suck and i'll never use them even on a street engine.
I know ya'll going to say that I should not have used them with my cam and springs, but Comp and Indy said I would be fine.
Now the engine is at RyanJ's shop and I cant wait to get it back!!!

1967 Barracuda 360ci/727 9.723ET @139.44mph
Re: Comp Pro Magnum rockers ? [Re: Badfish67] #694045
05/10/10 05:44 PM 05/10/10 05:44 PM
Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
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S/ST 3040 Offline
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I ran the Comp SB rockers 125 passes. Rotella-T 15W-40,
Shubeck lifters and 440+ lbs. open pressure.
They looked better than I expected.
Re: Comp Pro Magnum rockers ? [Re: Hemi Allstate] #694046
05/10/10 05:46 PM 05/10/10 05:46 PM
Joined: Jan 2003
Posts: 17,846
S.E. Michigan
ZIPPY Offline
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You won't have any problems with them if everything is set up correctly. It should be fine.

I haven't any issues with them at 500lbs open pressure without any bushings or honing.

Use/create Comp's recommended .030" side clearance, use a liquid assembly lube or oil (not thick paste), and whatever
you do...don't overtorque the shafts.

Rich H.

Esse Quam Videri




Re: Comp Pro Magnum rockers ? [Re: Badfish67] #694047
05/10/10 05:49 PM 05/10/10 05:49 PM
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IL, Aurora
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ademon Offline
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You ran $450 rockers with a 670 lift solid roller? they work fine for street type stuff
Re: Comp Pro Magnum rockers ? [Re: S/ST 3040] #694048
05/10/10 05:51 PM 05/10/10 05:51 PM
Joined: Jul 2006
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On the south side of Nowhere
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Re: Comp Pro Magnum rockers ? [Re: ZIPPY] #694049
05/10/10 06:14 PM 05/10/10 06:14 PM
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate Offline OP
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Mt. Eden Ky.


I haven't any issues with them at 500lbs open pressure without any bushings or honing.

Use/create Comp's recommended .030" side clearance, use a liquid assembly lube or oil (not thick paste), and whatever
you do...don't overtorque the shafts.





Sounds like I have it right except that I used Lubriplate assembly lube on the shafts? Is that a problem?
Thanks,
Mark


1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
Re: Comp Pro Magnum rockers ? [Re: Hemi Allstate] #694050
05/10/10 06:26 PM 05/10/10 06:26 PM
Joined: Jan 2003
Posts: 8,547
State College, PA
RyanJ Offline
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They work great until you get over 500 lbs of spring pressure... more pressure, the quicker they will gall.

Have had a bunch of customers not listen to me & end up galling their Pro Mags on Solid Rollers. Nice to know Comp is now bushing them...

PRW Chrome Molys are an almost exact copy of the Pro Mags, & have a thick bronze bushing in them... Alot less $, more choices of rocker ratios...(Pro Mags only 1.5) only problem is the adjusters are brittle. I just went over 8000 miles this morning on my PRW's on my 440, mild street solid roller, 190 seat, 550 open. I put T&D adjusters in them... been great rockers other than the adjuster issue.
Re: Comp Pro Magnum rockers ? [Re: Hemi Allstate] #694051
05/13/10 09:19 AM 05/13/10 09:19 AM
Joined: Jan 2003
Posts: 17,846
S.E. Michigan
ZIPPY Offline
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S.E. Michigan
Quote:



I haven't any issues with them at 500lbs open pressure without any bushings or honing.

Use/create Comp's recommended .030" side clearance, use a liquid assembly lube or oil (not thick paste), and whatever
you do...don't overtorque the shafts.





Sounds like I have it right except that I used Lubriplate assembly lube on the shafts? Is that a problem?
Thanks,
Mark



Lubriplate should be thin enough to wash away fairly quick. As usual prime with the valve covers off, watch everything....whenever possible you want oil flowing through there as opposed to great globs of greasey gunk clogging everything up (exaggerating a bit there).

Rich H.

Esse Quam Videri




Re: Comp Pro Magnum rockers ? [Re: ZIPPY] #694052
05/13/10 09:33 AM 05/13/10 09:33 AM
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate Offline OP
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Mt. Eden Ky.
Quote:

Quote:



I haven't any issues with them at 500lbs open pressure without any bushings or honing.

Use/create Comp's recommended .030" side clearance, use a liquid assembly lube or oil (not thick paste), and whatever
you do...don't overtorque the shafts.





Sounds like I have it right except that I used Lubriplate assembly lube on the shafts? Is that a problem?
Thanks,
Mark



Lubriplate should be thin enough to wash away fairly quick. As usual prime with the valve covers off, watch everything....whenever possible you want oil flowing through there as opposed to great globs of greasey gunk clogging everything up (exaggerating a bit there).




Thanks Zippy!

Mark


1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
Re: Comp Pro Magnum rockers ? [Re: Hemi Allstate] #694053
05/13/10 08:42 PM 05/13/10 08:42 PM
Joined: Dec 2004
Posts: 149
OH, USA
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Torred Offline
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I use the Comp Pro Magnum Rockers on a 440 with
COMP Cams XE 284 cam
COMP Cams P/N #911-16 Single Outer Valve Spring; 1.524" (with Damper)
COMP Cams P/N #867-16 Pro Magnum Hydraulic Lifters
Going on 5 years Street/Strip no problems, no complaints but I believe that the springs are considered marginal for my application.
Re: Comp Pro Magnum rockers ? [Re: Torred] #694054
05/14/10 12:35 PM 05/14/10 12:35 PM
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate Offline OP
master
Hemi Allstate  Offline OP
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Quote:

I use the Comp Pro Magnum Rockers on a 440 with
COMP Cams XE 284 cam
COMP Cams P/N #911-16 Single Outer Valve Spring; 1.524" (with Damper)
COMP Cams P/N #867-16 Pro Magnum Hydraulic Lifters
Going on 5 years Street/Strip no problems, no complaints but I believe that the springs are considered marginal for my application.



Thanks for your input. I am using the springs that came with the Edelbrock heads and I don't know how they compare to the Comps?




Mark


1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
Re: Comp Pro Magnum rockers ? [Re: Hemi Allstate] #694055
05/14/10 01:40 PM 05/14/10 01:40 PM
Joined: Jul 2008
Posts: 179
Up in the North and Far Away
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AutoEngineer Offline
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How do they feed oil to the pushrod cup and adjuster ball?

Is there an oil passage through the rocker body?
Re: Comp Pro Magnum rockers ? [Re: AutoEngineer] #694056
05/14/10 01:56 PM 05/14/10 01:56 PM
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate Offline OP
master
Hemi Allstate  Offline OP
master

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Posts: 2,675
Mt. Eden Ky.
Quote:

How do they feed oil to the pushrod cup and adjuster ball?

Is there an oil passage through the rocker body?




Yes, there is and oil flows directly to the cup.


1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019

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