The spring pressure with the rocker arms is something to watch, but the spring pressure with the heads is something that really has to be focused on. Large spring pressures will pull traditional rocker studs clear out of the heads and I’ve had it happen at 600 lbs with aluminum heads. If you have no desire to cut the heads and go to a T&D race rocker, I would look closely at putting a bigger insert in those heads.
My rockers are made by Harland Sharp but I had them put a cup pushrod seat in them so that pushrods are easier to get. A cup end pushrod has never been an optimal option as it introduces pushrod sweep into the system. It also adds to the cost of the pushrod.
Hi Brent,
Here are the specs of my heads done by you.
Thoughts ?
If you think T&D is the right rocker, I’ll go that route.
Thank you !
Does anyone know the T&D part number by chance ? (I’d like to just get the rockers as I’ve got new shafts end stands etc)
Here's the specs for your heads:
*BBM Ford FE castings
*SI stainless 2.190", 11/32" intake valve, 1.650", 11/32" exhaust valve
*45° seat, 30° back-cut on intake
*Chambers measured at 72.8cc
*Valve spring install height nominal 1.920"
*Comp 731 titanium retainers
*Comp 4776 spring locators
*Comp 611 valve locks
*Comp 529 Viton valve seals
*PAC 1245 valve springs
*Valve spring pressures 285/635
*Coil bind at 1.200"
*Coil bind clearance .070"
*.095" retainer to seal clearance