Quote:
Originally Posted by dci
Good points!! Pushrods no doubt will need to be 9/16 tapered if there is room.
Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!
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A friend that run PS bike and after spintron testing has told me that the port needs to cater to the push rod, Make room! But then again he runs a 2.700+ valve at 9800 so because of weight and valve acceleration ,he has big spring press, you may not need that kind of press. There are many variables.
Just for reference I am at 284@50 206@200 .543 lobe 1.9 rocker and total weight of valve, retainers , locks and lash cap is 119g. I am stable through 9200 no prob. IMO you will need to get more like 210+ at .200 with a 1.9-1 and better yet 2.0-1. That im sure would be enough area to insure you could make the 2.3 with a Pontiac with that kind of area. JMO I could wrong.