383 compression
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From: Lincoln Nebraska
Car: 86 Z28, 86 Seville, 98 Isuzu Rodeo
Engine: 383, HT4100, & 3.2 V6
Transmission: World Class T-5
Axle/Gears: G92 3.23
383 compression
I'm building a 383 with flat-top pistons(I'm not sure if it has 0, 2 or 4 valve reliefs) with a 5.7" rod length. I need some help in figuring out compression ratio I am at with different cc size heads. I'm looking at 74 and 68 cc heads, any ideas at what compression ratio I will be at with them?
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
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Originally Posted by ht4100
I'm building a 383 with flat-top pistons(I'm not sure if it has 0, 2 or 4 valve reliefs) with a 5.7" rod length. I need some help in figuring out compression ratio I am at with different cc size heads. I'm looking at 74 and 68 cc heads, any ideas at what compression ratio I will be at with them?
Thread Starter
Junior Member
iTrader: (2)
Joined: Dec 2005
Posts: 71
Likes: 0
From: Lincoln Nebraska
Car: 86 Z28, 86 Seville, 98 Isuzu Rodeo
Engine: 383, HT4100, & 3.2 V6
Transmission: World Class T-5
Axle/Gears: G92 3.23
I checked with the supplier of the motor kit, is should be around 9.75-1 with 70cc heads
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