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tii Compression Test

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I'm going to compression test my '74 this weekend.

Understanding that consistency (within 10% between cylinders) is most important, what are "good" "fair" "poor" readings for a stock tii?



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....before testiing - adjust valves COLD

to 0.006" ...0.008"

compression test 1502 - 2002tii

good = above 10.5 bar.... (149.3 lb/in)

normal = 9.5 bar............. (135.1...149.3 lb/in)

poor = below 9.0 bar....... (128 lb/in)

test procedure

use calibrated tester,

with battery fully charged,

engine at operating temperature

and throttle fully open.

Turn engine over at starting speed.

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