pocket rocket Posted November 20, 2012 Report Share Posted November 20, 2012 Did any of the A series motors come from the factory with head studs rather than the more common bolts, as cylinder head fixings? Would anyone know the original cylinder head height or deck thickness, so that we can try to determine how much a head has been machined (specifically A12 for this question)? or possibly the original chamber cc's? Quote Link to comment
Dat Lurka Posted November 20, 2012 Report Share Posted November 20, 2012 1,171 / 4 = 292.75 that's all I know. Quote Link to comment
ggzilla Posted November 20, 2012 Report Share Posted November 20, 2012 Did any of the A series motors come from the factory with head studs rather than the more common boltsNope. Starting in mid-1972 it used super strong Chromoly V bolts. So strong they used them in the Z24 engine later on. Clean the threads carefully and torque to spec and you'll never have a problem with them. Quote Link to comment
ggzilla Posted November 20, 2012 Report Share Posted November 20, 2012 Would anyone know the original cylinder head height or deck thickness, so that we can try to determine how much a head has been machined (specifically A12 for this question)? or possibly the original chamber cc's? Most say 74mm head thickness, but there are a few reports of thicker heads A12 Chamber size: 29cc (open or closed versions), compression was changed via 3-different piston dish. You can tell by looking here how far a head has been skimmed. If the boss isn't surfaced, it is an uncut head. Quote Link to comment
pocket rocket Posted November 21, 2012 Author Report Share Posted November 21, 2012 thanks ggzilla. don't suppose you would know what the reduction in head thickness required is per chamber cc? Quote Link to comment
ggzilla Posted November 21, 2012 Report Share Posted November 21, 2012 I do not know. Quote Link to comment
Stoffregen Motorsports Posted November 22, 2012 Report Share Posted November 22, 2012 thanks ggzilla. don't suppose you would know what the reduction in head thickness required is per chamber cc? You should look into and learn engine math. It's simple geometry really. There are online calculators, but the best way is to buy an engine math book so you can have it on the workbenchnext to you. Here are some helpful links. http://www.carrollsmith.com/books/ http://www.mre-books.com/smallblockfrd/smallblockfrd7.html http://www.doverusa.com/engine-math.php http://www.wallaceracing.com/Calculators.htm Quote Link to comment
ggzilla Posted November 22, 2012 Report Share Posted November 22, 2012 Why should I learn that? I'm not interested in shaving a head. I'm bald enough already :-) 2 Quote Link to comment
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