Schubeck lifters

[Bill Diehl]

Originally Posted by Leif Andersson

How much spring can you safley use whith the toolsteel lifters and the different cam cores avalible for a mech. flat tappet set up.
454/425hp whith its heavy valve train in mind.

Thanks
B/SA 529
Leif Andersson

You need to use the Pac 1427 spring with Pac ret and locks...the ret and lock combo is 12 grams, and the lightest valves on the market are the ferrea hollow stems 110 and just under 120

same stuff I use in the ford the valve sizes are the same you have .018 more lift than I have.... DLC lifters, tool cam core BTW the spring weighs 85g and the frequency is just what you need, something most overlook

Of course somebody will say otherwise but that's the best valvetrain package that's available for the combo