Going together well Boof although there seems to be some clearance issues between the pushrods and my Comp Cams Ultra Gold rockers. I think I may have to go down the path of purchasing some complimentary Trickflow rockers as I presume they have more clearance/relief around the pushrod side.
MLS gaskets don't compress much do they? I have a 0.040" gasket that I have lightly cinched up for pushrod measuring and just wandering how much this will through the measurement out...2/3 of stuff all is my feeling.
I have ended up retarding the cam -2deg after the degreeing process as well for those playing at home.
The Multi Layer Steel gaskets (MLS) are great though by their nature your right they do not compress much at all. The changed angle for the 11 and 13 degree valves means you will require longer pushrods - even longer than you had for the older 170 heads (which would have been around 6.75. It will be around 7.2 / 7.3 for the 11R heads. I am not aware of any need for specialist rockers so I am assuming your not testing it with correct length pushrods. If need minor clearance you could use a dremel to make some room.
I might send Fordstrokers a quick email to get there thoughts on contact between rocker and pushrod. I need to get a new pushrod measuring tool as mine now seems to be bent. Not sure whether that was as a result of this clearance or whether the spring rate on these valve springs is a bit much for my checking tool either way mine needs a bit of panel beating/replacement.
Correct about 1 inch down from top ball end the OD of the pushrod is contacting the rocker body. The rocker body is relieved for pushrod clearance but looks like it needs another 1 - 2 mm to achieve an air gap. It is contacting I cannot even get a thin feeler gauge through.
If you have a minimal pattern (or getting there because you cannot test it due to interference) and the virtual line from the roller pin and rocker bearing (so rocker angle) is basically 90 degrees to the valve shaft at 1/2 lift then your on the money as far as pushrod length goes. So you either have to create some clearance or purchase other rockers. I have no problem grinding into the rockers to create extra clearance as the material is thick but that is your call. As far as loosing some gold anodising - well it gets covered by the rocker cover in the long run - then you splash oil all over it. It is really for the nice photo during the build after which it means little.
You can simply clearance the back of the rocker with no ill effects. There are other rockers such as the K351 rocker from ford racing which is made by crane, these clear easily. Crane gold do, comp steel do. Its up to you but clearancing your current rockers is perfectly fine. Trick flow rockers are scorpion rockers, I never use these. Its not that other rockers have more relief, other rockers are just not as bulky back there
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