Quote:
Originally Posted by "QUICK-SILVER"
8:1 or 8.2:1 SCR with 6X-4 heads
Clay
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Just to be clear, the compression increase is based off of advertised or published, which I think we can all agree wasn't necessarily what was real world compression;
I don't have any 77-79 factory service manuals to see if the W72-400 had a published compression of 8.0:1, but do recall that 7.6 was the advertised compression for this period - I do have a full model line 1978 brochure, and it does not show compression.
Quote:
Originally Posted by hurryinhoosier62
Quote:
Originally Posted by unruhjonny
The problem with cutting too much off the deck is that you can never add it back. ...
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This is WHY so many performance engine builders and race engine builders use custom pistons whenever possible. You can have pistons manufactured to your required deck height. DSS, RaceTec, and Carrillo/CP all offer displaced pin height to reduce the amount of material removed from the block decks. I order no parts until the block decks have been trued, the crank strokes equalized and the rod c-to-c length is set. This way, when I order pistons, I know exactly what my deck height is going to be. |
this is smart, and until I started going down this rabbit hole I had never read of builders doing this;
standard procedure
seemed to be to order available slugs for the desired bore and to call it a day.