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Old 11-21-2014, 05:21 PM   #1
EricStaab
 
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Cummins 12v roller rockers

12v rocker bodies just out of the machine. Sub-plates, stands, and shafts are finished. Billet valve covers are next, and then we are ready to rock.
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File Type: jpg No Limit Cummins 12 Exh Roller Rocker.jpg (34.4 KB, 0 views)
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No Limt MFG,
Manufacturer of diesel performance engine parts: Billet camshafts, rods, valvetrain components, cylinder heads. We take on the hard and unusual jobs no one else is willing to do.
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Phone:715-384-4422
 
Old 11-21-2014, 05:47 PM   #2
pick017
 
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Looks awesome I'm going to be in need of a set this season.
 
Old 11-21-2014, 08:33 PM   #3
khales
 
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Me too can't wait to see the finished product
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94 sclb 2500 prostock/ss 6.7 12v puller Gonebroke
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14 cclb 6.7 68rfe 2500 dd tow rig
 
Old 11-22-2014, 12:12 AM   #4
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What ratio will they be?
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Mike Hill
 
Old 11-22-2014, 07:35 AM   #5
Bodacious
 
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Very nice.
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Old 11-22-2014, 08:27 AM   #6
jedeka

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Ratios are 1.7, 1.75 and 1.8
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Old 11-22-2014, 08:38 AM   #7
DISTURBED
 
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What's the price going to be on these?
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Thanks, Jeremy

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Old 11-22-2014, 09:06 AM   #8
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$3500 is the introductory price for the whole kit.
 
Old 11-22-2014, 01:19 PM   #9
EricStaab
 
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We can do custom ratios too. Two week lead time on custom ratios right now.

These are a complete kit, which includes the sub-plate, new rocker stand, new coated rocker shaft ( coating is a combination a hardness coating to make the surface harder more wear resistant, and lubricant coating), and billet (made from a solid chunk of aluminum, not fabricated) 1 piece valve cover. The rocker stand is bolted down with 7 bolts, the shaft bolts to the stand with a bolt between each rocker. The shaft and stand have some very tight tolerances were they lock together like a Lego. It is very rigid compared to stock. The valve cover also has spray oiling for the roller tip and valve springs.

We improved the rocker geometry to reduce the movement of the rocker arm across the tip of the valve. We built the geometry around the stock valve, and slightly taller to accommodate the Hamilton head and large valves. If by chance you would have a taller valve, we can adjust the sub-plate and installed rocker centerline for you.

So why did we not just make a rocker to fit the stock stands. My experience has been this. When the shaft is unsupported on each side of the rockers the shaft will flex. More than you think. I have seen shafts flex, just by rolling over the motor, and checking lash, by as much as .025. That's a lot, like a mile. So what does that do. Well now the cam is not doing what it is supposed to do. You just lost part of your lift. You changed the duration, and timing of the cam. That can mean a reduction in hp and torque. It also introduces frequencies and vibration into your valve train that you do not want. These frequencies have impacts on the durability of the camshaft, pushrod, rocker arm, lifter, and valve springs. The impact is usually not beneficial. Usually there will be a reduction of durability in the components. In short that is the reason we chose to make a complete kit.
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Old 11-22-2014, 02:02 PM   #10
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Quote:
Originally Posted by EricStaab View Post
The rocker stand is bolted down with 7 bolts, the shaft bolts to the stand with a bolt between each rocker. The shaft and stand have some very tight tolerances were they lock together like a Lego. It is very rigid compared to stock.
Eric showed me this when I stopped in awhile back. The parts almost do snap together like Legos. Very nice solid design for sure. Cant wait to get his junk on my truck.
 
Old 11-22-2014, 04:46 PM   #11
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Very cool! Would love to see it all in action.


Sent from my iPhone using Tapatalk
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VE vs VP....isn't that like watching retard's fight?
 
Old 11-22-2014, 05:27 PM   #12
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Awesome! I'm guessing with the one piece valve cover stock lines will not fit?
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Old 11-23-2014, 03:28 PM   #13
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Mr.Staab-I'm down to see a couple of pics of the whole shebang.....
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Old 11-23-2014, 05:01 PM   #14
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Quote:
Originally Posted by RacinDuallie View Post
Mr.Staab-I'm down to see a couple of pics of the whole shebang.....
X2!!! I wanna see this setup!
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6.7 sled puller, cracked motor in half.... Nothing to show for it. But ready to try again.
 
Old 11-24-2014, 07:48 AM   #15
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I will put some more pictures up once we finish the valve cover. It is very much like the SMT kit that is out there. We made improvements in the areas we thought needed it, and committed to stocking 3 different ratios.
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Old 11-24-2014, 07:14 PM   #16
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What kind power increase are you seeing from these
 
Old 11-25-2014, 08:47 AM   #17
EricStaab
 
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Zero. Essentially you could see some gains just from the fact they are roller with less friction, and inertia is less because the rocker arms are lighter, but I'm not going to guarantee any hp gains. It really comes down to your combination. The combination of the head, cam, and turbo, plus the right rocker ratio to achieve the lift needed. So you may see absolutely zero hp gain, and you might see a lot of hp gain.
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No Limt MFG,
Manufacturer of diesel performance engine parts: Billet camshafts, rods, valvetrain components, cylinder heads. We take on the hard and unusual jobs no one else is willing to do.
Website: NoLimitMfG
Facebook: Nolimitmfg
Phone:715-384-4422
 
Old 11-26-2014, 05:58 PM   #18
EricStaab
 
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Billet Valve Cover for rocker kit

Sneek Peek of billet valve cover for rocker arms kits.

Click the image to open in full size.
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No Limt MFG,
Manufacturer of diesel performance engine parts: Billet camshafts, rods, valvetrain components, cylinder heads. We take on the hard and unusual jobs no one else is willing to do.
Website: NoLimitMfG
Facebook: Nolimitmfg
Phone:715-384-4422
 
Old 11-26-2014, 06:01 PM   #19
EricStaab
 
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Picture attached. More pics on our facebook page.
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File Type: jpg 12V Roller Rocker Kit Billet Cover No Limit MFG.jpg (42.5 KB, 0 views)
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No Limt MFG,
Manufacturer of diesel performance engine parts: Billet camshafts, rods, valvetrain components, cylinder heads. We take on the hard and unusual jobs no one else is willing to do.
Website: NoLimitMfG
Facebook: Nolimitmfg
Phone:715-384-4422

Last edited by EricStaab; 11-26-2014 at 06:02 PM.
 
Old 11-26-2014, 09:51 PM   #20
f-250dieselman

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Looks good Eric
 
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