Okay guys I've been seeing some problems with cams hitting rockers because the rockers have been improperly cut. There are a few rockers out there being sent around with a flat cut across the bottom that need to be radiused at two critical points. The dead giveaway is the exhaust lobe is the only one getting hit. The lobe seems to clear just fine when you visually inspect the clearances, but as the rocker goes through it's travel, it will hit the leading and trailing edge of the cam lobe.
Here is a pic of the offending area highlighted with blue dye;
(http://i233.photobucket.com/albums/ee157/kennybasham/Picture009.jpg)
Here is lobe damage on a cam with only .389" lift. The shape of the performance style "square" lobe is the issue here. This style of lobe is very beneficial for max performance.
(http://i233.photobucket.com/albums/ee157/kennybasham/Picture010.jpg)
Here is the correct way to radius the bottom. This allows you to get proper clearance while maintaining maximum material thickness for durability. You can actually grind through the hardened surface of the rocker body, so keeping the max material thickness is good practice.
(http://i233.photobucket.com/albums/ee157/kennybasham/Picture015.jpg)
(http://i233.photobucket.com/albums/ee157/kennybasham/Picture014-1.jpg)
Kenny, do you by chance have another rocker to show a top view comparison between a good and bad?
some more pics of clearanced rockers.... these are done by WEB with some additional work
(http://i23.photobucket.com/albums/b357/dcloveridge/quads%20and%20trucks/DSC00329.jpg)
(http://i23.photobucket.com/albums/b357/dcloveridge/quads%20and%20trucks/DSC00331.jpg)
(http://i23.photobucket.com/albums/b357/dcloveridge/quads%20and%20trucks/DSC00328.jpg)
Why the spot weld on the outside of the roller ???
This has cost me 2 ruined cams (customer installed)........ It doesn't even make extra noise, just low dyno numbers were the only obvious indicator that something was wrong. I would request no tack weld. The heat can cause stress fractures and failure. All you need to do is slightly swedge the axle sleeve and it will never come loose.
Here is the difference. The left one is a go, the one on the right is a no go :thumbs:
(http://i233.photobucket.com/albums/ee157/kennybasham/Picture.jpg)
:rofl:
never seen one cut life that.. that wont do a whole lot of good
Quote from: DL700 on April 24, 2009, 02:19:08 PM
:rofl:
never seen one cut life that.. that wont do a whole lot of good
That one came straight from miss Laurie :thumbs:
For those that are fans of my hillbilly ingenuity.......Here is a roughed-in drag rocker, sorry no final product pics(intentionally)
(http://i233.photobucket.com/albums/ee157/kennybasham/Picture016.jpg)
(http://i233.photobucket.com/albums/ee157/kennybasham/Picture017.jpg)
patent pending 8)
Quote from: Colorado700R on April 24, 2009, 03:00:30 PM
patent pending 8)
:rofl: Believe it or not it saves more weight over the valve than swapping stainless valves out for Ti. I will love to see the first guy to copy these.....One bit of grinding in the wrong spot, or not cryo treated, BOOM! Grenade time :nod:
pushin your luck on those IMO... but NICE!!
Quote from: Kenny on April 24, 2009, 03:05:55 PM
Quote from: Colorado700R on April 24, 2009, 03:00:30 PM
patent pending 8)
:rofl: Believe it or not it saves more weight over the valve than swapping stainless valves out for Ti. I will love to see the first guy to copy these.....One bit of grinding in the wrong spot, or not cryo treated, BOOM! Grenade time :nod:
Kenny have you had good luck with the cryo treating?
Seems like flirting with disaster to me grinding that much down, but i am no expert. I would be interested to see how these hold up!
I like gernades, with a family full of former Marines, they make family reunions more interesting :lol:
Quote from: DL700 on April 24, 2009, 03:16:32 PM
pushin your luck on those IMO... but NICE!!
Thank ya very much 8)
Quote from: preddy08 on April 24, 2009, 03:27:14 PM
Quote from: Kenny on April 24, 2009, 03:05:55 PM
Quote from: Colorado700R on April 24, 2009, 03:00:30 PM
patent pending 8)
:rofl: Believe it or not it saves more weight over the valve than swapping stainless valves out for Ti. I will love to see the first guy to copy these.....One bit of grinding in the wrong spot, or not cryo treated, BOOM! Grenade time :nod:
Kenny have you had good luck with the cryo treating?
Yes. Especially with chains(drive or timing). Nitriding and certain coating treatments work well too. I have seen no real difference when using thermal barriers though, except for less carbon buildup.
Quote from: robkd on April 24, 2009, 03:40:14 PM
Seems like flirting with disaster to me grinding that much down, but i am no expert. I would be interested to see how these hold up!
I have had a set running for about a month now. The hardest part was finding narrow adjusting nuts in the right thread pitch. There has been substantially more material removed from non-critical areas since that picture. There has also been some "clocked" oiling mods done as well. ::)
Quote from: Colorado700R on April 24, 2009, 03:41:58 PM
I like gernades, with a family full of former Marines, they make family reunions more interesting :lol:
Never retired, only former. But always a Marine.......Semper Fi!
sweet
kenny, as always im amazed by your injenuity. i offer my sister as a barter so that you may marry into my family and be my brother inlaw. :lol: cant wait for my goodies to arrive.
Quote from: kamakazi on April 24, 2009, 08:49:28 PM
kenny, as always im amazed by your injenuity. i offer my sister as a barter so that you may marry into my family and be my brother inlaw. :lol: cant wait for my goodies to arrive.
I've been on the adoption list for awhile and I think Kenny would be good Daddy for me.. :clap:
Quote from: kamakazi on April 24, 2009, 08:49:28 PM
kenny, as always im amazed by your injenuity. i offer my sister as a barter so that you may marry into my family and be my brother inlaw. :lol: cant wait for my goodies to arrive.
Your sister would kill you once she got a load of me!! :nod:
Quote from: 4gunz4x4z on April 25, 2009, 12:04:01 AM
Quote from: kamakazi on April 24, 2009, 08:49:28 PM
kenny, as always im amazed by your injenuity. i offer my sister as a barter so that you may marry into my family and be my brother inlaw. :lol: cant wait for my goodies to arrive.
I've been on the adoption list for awhile and I think Kenny would be good Daddy for me.. :clap:
There's somethin' I been needin' to tel ya.......son..... :lol: