[DeTomaso] 351c Deck Height?

[Will Kooiman]

I checked my deck height on the last 2 engines.

The previous engine was pretty far off.  One side was 0.010" "in the
hole".  The other was 0.003 to 0.007 or something like that.  Memory
fails.  I had it zero decked - mostly to make it consistent.  It doesn't
sound like much, but I think it was 0.25-to-1 difference in CR.

My current block was spot on.

But no - it isn't too late once you have pistons.  You assemble it,
measure the distance in-the-hole at TDC, and then take the block back to
the shop to fix problems.

I've also heard that early 351C blocks had a slightly lower deck height.
--
Will





On 12/5/14 2:50 PM, "Ken Green via DeTomaso" <detomaso at poca.com> wrote:

>   I have seen 351C head gasket descriptions with thickness between .027
>   and .120 (some even thicker):
>   [1]http://www.jegs.com/p/Cometic-Gaskets/Cometic-Ford-351C-351M-400-Cyl
>   inder-Head-Gaskets/2849496/10002/-1
>   Seems like you could just get the right head gasket after the short
>   block is done?
>   Ken
>     __________________________________________________________________
>
>   From: Corey Price <coreyjprice at gmail.com>
>   To: "detomaso at poca.com" <detomaso at poca.com>
>   Sent: Friday, December 5, 2014 11:34 AM
>   Subject: [DeTomaso] 351c Deck Height?
>     Yes, the standard answer for centerline of crank mains to head
>   surface
>     is 9.206" for a 351 Cleveland.A  What's funny is that my 30-yr-old
>     "Ford Performance" book states that the '71 Boss 351 block was
>   between
>     9.201" and 9.211" and the rest of the 351 blocks are 9.213".A  I'm
>   sure
>     the 9.206" height I find in most literature is the average of 9.201"
>     and 9.211".A  My machinist claims that most blocks are on the high
>   side
>     of the specified deck height.A  Not being a machinist, I can't tell
>   one
>     way or another.A  The reason I'm asking is that I'd like to order
>     pistons with the correct pin (compression) height and there's a
>   readily
>     available piston in a 0.020" overbore from Probe that fits, but it
>     wouldn't give much room for surfacing the block deck if the deck
>   height
>     is 9.201".A  I'm not sure I have the tools to accurately measure deck
>     height.A  The machinist said he usually checks for warping and height
>     with the pistons at four corners, but isn't that a little too late?
>     Corey
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>References
>
>   1. 
>http://www.jegs.com/p/Cometic-Gaskets/Cometic-Ford-351C-351M-400-Cylinder-
>Head-Gaskets/2849496/10002/-1
>   2. mailto:DeTomaso at poca.com
>   3. http://poca.com/mailman/listinfo/detomaso_poca.com
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