Join Date: Jun 2007
Location: Perth, West Australia
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Well C and C block has been back from boreing( so pistons can fit to do a mock up ) for some time , bearings arrived , crank issues resolved and so I started the mock up on Saturday.
First the counterweights on the Bryant crank hit the sleaves. Oh well , out with the tools and grind away at the sleaves until its flush with the bottom of the block support. Put the crank back in , still a little tight , take away a bit of block and some more sleave. Perfect. Clean the block , blow it out , beautiful.
Put the bearings and crank back in , time for a rod and piston. You guessed it , the least of the work was the counterweight clearence , the rods need a 1.2" dia notch thru the sleave and the bore support/block.
Maybe I was a little nieve in thinking that an aftermarket block would fit a 4.5" throw crank and Aluminium rods without too much clearence issues. Wrong.
My standard 460 truck block and cheap cast Scat 4.5 crank went together like pie and cream , but when you start using serious part for serious engines everything needs checking , adjusting , blueprinting etc etc.
It really brings home to me the value of those quality engine builders out there. They do earn what they charge for their high end stuff. Its no a simple matter of bolting the right parts together , it making them work together where all the hours go.
Just a little insight into where I'm at , and Im loving every minute of it , under the guidance of mentors who know. I will keep plodding along with it.
Heads and manifold should be finished in a week or so , and with final flow figures we can order a cam.
The Boss 9 figures look good against other big heads like the Dart Big Chief's . My head porter thinks the engine should make a "bunch" of power even with our conservative starting cam range ( looking around 285@50th in the 750 lift range )
27T JPP Speedster, 572ci Boss 9.