416 heads compression
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From: il
Car: 87 iroc
Engine: 350
Transmission: 700r4
416 heads compression
What is the compression on a l03 with 416 85 tpi heads? I wondering this because the 85 tpi 305 have 9.5 to 1 compare to the L03 that have 9.3 to 1 compression. So I was wondering if the heads have a smaller camber or the pistons r different?
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Joined: Mar 2002
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
more than jut the heads or pistons affect CR, also the cam wil make some difference, how much air can get into the cylinders to be compressed
Joined: Jan 2005
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
The difference is in the pistons. The L03 has 4 valve reliefs with a slight dish in the center. The LB9 has flattop pistons with 4 valve reliefs. 081, 416, and 187 heads have 58cc chambers. 601 heads have 52cc chambers
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