Re: Would you run a solid roller with ductile rockers?
[Re: viperblue72]
#2589967
12/10/18 06:42 PM
12/10/18 06:42 PM
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Joined: Feb 2005
Posts: 20,172 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,172
PA.
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I ran a set of unbushed rockers on my 440 years ago with a 695 mushroom tapping cam for years. Strip only car but we raced 2-3 times a week.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Would you run a solid roller with ductile rockers?
[Re: viperblue72]
#2589971
12/10/18 06:53 PM
12/10/18 06:53 PM
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Joined: Jan 2003
Posts: 9,996 Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
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Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
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Seems to me it will be about the intensity of the lobes, and how much they stress the rockers, not what type of lifter they use. A street roller would probably be easier on the rockers than a race flat tappet. My geuss is an endurance roller lobe would be worth looking at, and find some of the OLD big name engine builders from the 60s or early 70s, as they probably tried everything. I know for instance that Crane Gold rockers will stand up to a .750 lift superstock roller, at least for a while. I broke the crank before i put many runs on that setup.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Would you run a solid roller with ductile rockers?
[Re: viperblue72]
#2589975
12/10/18 07:07 PM
12/10/18 07:07 PM
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Joined: Jan 2003
Posts: 14,496 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
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So. Burlington, Vt.
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“I wouldn’t”, but I’m sure many have.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Would you run a solid roller with ductile rockers?
[Re: viperblue72]
#2589981
12/10/18 07:18 PM
12/10/18 07:18 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Pbody- I plan to run something that is approximately.400 lobe lift. At about .400 lift I would.. sweep is minimal if its set up right.. assuming this is some street grind cam
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Re: Would you run a solid roller with ductile rockers?
[Re: viperblue72]
#2589990
12/10/18 07:38 PM
12/10/18 07:38 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
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Washington
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That rocker is better than most of the junk that was sold out there.
If it's bushed, make sure it has full oil and keep idle oil pressure and flow up. I've run .750 net rollers and 340 on the seat with those rockers.
If you break that rocker, it's a geometry issue, or some other problem like a binding issue.
I'd pay to run those before I'd use a set of HS rockers for free.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Would you run a solid roller with ductile rockers?
[Re: viperblue72]
#2590054
12/10/18 09:16 PM
12/10/18 09:16 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
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master
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New York
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Careful inspection for minor surface imperfections. If any catch your fingernail (high precision instrument) just blend them into the casting with a fine stone until you can't feel it. Especially careful of lower surface of valve-side lever. Any sign of relieving, machining for spring or retainer OD? If you're really nervous, cryo treatment may make you feel better. Yes, I'd run them.
Boffin Emeritus
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Re: Would you run a solid roller with ductile rockers?
[Re: viperblue72]
#2590100
12/10/18 10:14 PM
12/10/18 10:14 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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master
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Washington
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Whatever I run will be a street type roller. I wasn’t so much worried about durability of the rocker, but wear and tear on the guides and valve tips etc. The last street roller I ran was 200 seat pressure and 560 open, although it probably never saw 560 with only .580 lift. If the geometry is correct, the guides won't wear out. That rocker is highly underrated. To you have the econo head or the are you using offset blocks and shafts?
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Would you run a solid roller with ductile rockers?
[Re: viperblue72]
#2590170
12/11/18 01:03 AM
12/11/18 01:03 AM
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Joined: Aug 2003
Posts: 43,157 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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Many,many , many SS Mopar racers used them for years and years. I'm sure there a decent piece to start with for the W2 so I wouldn't hesitate at all on using them John Dieanna used them on his old M.P and later Comp Eliminator W2 motors, he let the clutch out at 8200 and shifted it around 8800 RPM As far as I know he never broke one either
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Would you run a solid roller with ductile rockers?
[Re: madscientist]
#2590204
12/11/18 02:09 AM
12/11/18 02:09 AM
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Joined: Aug 2006
Posts: 2,141 junction city oregon
viperblue72
OP
top fuel
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OP
top fuel
Joined: Aug 2006
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junction city oregon
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Whatever I run will be a street type roller. I wasn’t so much worried about durability of the rocker, but wear and tear on the guides and valve tips etc. The last street roller I ran was 200 seat pressure and 560 open, although it probably never saw 560 with only .580 lift. If the geometry is correct, the guides won't wear out. That rocker is highly underrated. To you have the econo head or the are you using offset blocks and shafts? These are the w2 race head.
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Re: Would you run a solid roller with ductile rockers?
[Re: viperblue72]
#2590247
12/11/18 05:11 AM
12/11/18 05:11 AM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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master
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Washington
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Whatever I run will be a street type roller. I wasn’t so much worried about durability of the rocker, but wear and tear on the guides and valve tips etc. The last street roller I ran was 200 seat pressure and 560 open, although it probably never saw 560 with only .580 lift. If the geometry is correct, the guides won't wear out. That rocker is highly underrated. To you have the econo head or the are you using offset blocks and shafts? These are the w2 race head. Then you should have offset stands and shafts. Make sure the stem height is correct. Then you adjust the stand height to correct the geometry. If you get that right, those rockers are good to at least 8800 RPM with the spring loads I posted earlier.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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