According to Scott Sheeler's Rising Sun Racing catalog, it's 3.248" (82.5mm).
http://www.gordon-glasgow.org/RSR_Head_1600.asp
The R16 isn't as sensitive to head cutting as the U20 because it isn't an
overhead cam, but it still raises the compression ratio the same if you mill it.
But at least there you have the opportunity to do some grinding in the
combustion chambers to unshroud the valves while you get the compression ratio
back to something reasonable.
Gordon Glasgow
Renton, WA
> -----Original Message-----
> From: owner-datsun-roadsters@autox.team.net
> [mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of SlowBoy
> Sent: Wednesday, November 20, 2002 12:46 PM
> To: datsun-roadsters@autox.team.net
> Subject: 1600 Head
>
>
> I'm at a loss as to what else to search under in the archieves. I've tried
> head, thickness, cylinder, surface, surfaced, decked, height, valves, seats,
> seals, mill and milled.
>
> The three main has some black splatter out the tail pipe and does not seem to
> have the power my 5 main has, so I'm thinking about a rebuild top and bottom.
>
> What I am looking for is the measurements of an uncut 1600 head and how much
> it can be taken down to. Also, how would I make those measurements myself?
>
> Thank you!
>
> Jim
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