Pistion to cyl 496 chevy bb
12-23-2013 | 11:45 PM
#12
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Joined: Aug 2011
Posts: 2,733
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From: bel air, md
Measured an srp piston from a 540 as I tore it down today. This was actually sparked by a conversation the other night when one "engine builder" was describing the shoddy work of another saying how loose the pistons were in the bore as he measured with. A feeler gauge above the ring land with the piston in the block..... Yes measured piston to wall with a feeler gauge.... Anyway on these pistons above the top ring was .030 smaller diameter than the skirt.
12-24-2013 | 11:17 AM
#13
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Joined: Jul 2008
Posts: 931
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From: Little River SC
Anyone that sticks a feeler gauge, from the top of the piston down to the ring is a complete -------------- IDIOT! Not even going to explain; piston barrel design.
12-25-2013 | 06:09 PM
#17
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Joined: Aug 2012
Posts: 216
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From: Chesapeake City, Md
MERRY CHRISTMAS! Thanks guys tor the info. I forgot about the skirt vs ring lands. Have anyone heard of the rear 2 cyl 7/8 loosing comp over time (a season) of hard running? I forget who mentioned it but said chevy bb have a tendency to do this? Sounds kind of crazy to me but..........All were at 170 to 150 psi but 7/8 were at 90.
