What pistons do I have?

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royslead

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Ok, I know they are Keith Black, they are mostly flat tops, with valve reliefs. Anyone familiar with these? Are they any good (these are newer, so condition wise, I know they are good) for power/ mild build? I will be using 452 heads, and either a Comp Camps XE268H or XE275H, I think. I am open to suggestions on that as well. I pulled them out of my 383, I didn't find any oversize markings on them , but there is a "40" stamped under the piston (I tried to get a picture of it). Also, lots of room between top and second ring.
Thanks.
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Last edited:
Manufacturer's Part Number:
KB162-030
Part Type:
Pistons
Product Line:
Keith Black KB Performance Pistons
Summit Racing Part Number:
UEM-KB162-030
UPC:
800745049476
Piston Rings Included:
No
Bore (in.):
4.280 in.
Bore (mm):
108.712mm
Stroke:
3.375 in.
Engine Stroke Type:
Stock
Rod Length:
6.358 in.
Piston Style:
Flat top, with two valve reliefs
Piston Material:
Hypereutectic aluminum
Compression Height (in.):
1.908 in.
Piston Head Volume (cc):
+5.00cc
Wrist Pin Style:
Press-fit or floating
Wrist Pin Retainers Included:
Yes
Wrist Pin Included:
Yes
Pin Diameter (in.):
1.094 in.
Piston Ring Thickness:
5/64 in. x 5/64 in. x 3/16 in.
File Fit:
No
Gapless:
No
Quantity:
Sold as a set of 8.
Keith Black KB Performance Pistons
 
Making a BUNCH of assumptions regarding volumes, deckheights,and head gaskets, i got those pistons at 8 to 1. But with work, decking the block, thin small bore head gaskets, deck some cc's out of the heads, i think you can get to 9 to 1. Can be a good piston for a street build IF.... the bore works, is tight enough, for hipereutectic pistons.
 
a replacement piston with reliefs, with the 452 head and steel shim gasket about 8.8 compression.
 
Zero deck with 75 cc head and steel shim gasket about 9.7 comp
 
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