pres589
SuperDork
11/1/13 9:03 a.m.
So when a pushrod engine is being blueprinted, a guy will go and get dykem or similar stuff and put between the tip of a rocker arm and the valve. He'll then rotate the cam through a couple revolutions and pull the rocker off and check the contact area. Using an adjustable pushrod and very weak valvesprings, he can figure out the optimum pushrod length to get a contact area in the middle of the valve tip.
What it sounds like you might need to do is similar; install an HLA in a rocker and use a weak valvespring to support the valve. Run the cam through a rotation or two and then pull apart. Then swap in a shim, something real thin, and do it again. You're trying to get the contact between the valve tip and the HLA "button" into optimum conditions with the shim.
Or you could just try and find out what worked for someone else and pray. Or just run a stock cam because you're time limited. This sounds like a weekend of fun AFTER you have a whole pile of different thickness shims.
It's pretty common to run 2.4 lifters in a 2.2 and they require a shim. Everyone just runs a certain washer from fastenal and it works. I'd measure the diameter of the hole it needs to go in and the thickness and go to fastenal and find one.
moparman76_69 wrote:
It's pretty common to run 2.4 lifters in a 2.2 and they require a shim. Everyone just runs a certain washer from fastenal and it works. I'd measure the diameter of the hole it needs to go in and the thickness and go to fastenal and find one.
Yeah and that's pretty much what Delta said. "Go to a bolt place and tell them you need a #10 SS washer."
But now i'm finding that it's not that simple.
I'm 99.9% sure i need a 0.030" thick washer, so i guess i just need to get calipers on the rocker and see what i get.
pres589
SuperDork
11/1/13 9:11 a.m.
In reply to moparman76_69:
Agreed. This part is stacked in an assembly, not seeing direct contact with a valve tip or something like that. Something with some hardness and I think it's good.
So go to fastenal, tell them you need #10 SS washers, have them bring you the box and find some as close as possible to .030"
Leafy
Reader
11/1/13 9:23 a.m.
Why do you need SS here? Steel isnt going to rust while bathed in oil and it'll be cheaper and better mechanically.
Leafy wrote:
Why do you need SS here? Steel isnt going to rust while bathed in oil and it'll be cheaper and better mechanically.
You're asking the wrong person for that. I have no idea.
I'm not REAL concerned about the cost, when it seems they're a whopping 5 cents each.