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Valve spring comparison #2
Evo VIII, Stock DSM, Manley, Brian Crower





From left to right

· Used EVO VIII
· Used Stock 4G63
· Used Manley
· Used BC1100
· New BC1100


The EVO springs, set of 16, tested 58-62 lbs @ 1.530


Used stock 4G63 valve spring Appox. 140k miles
56lbs @ 1.530


Used Manley Valve spring, mileage unknown.
78lbs @ 1.530


Used BC1100 valve spring, Appox 5000 miles
85 lbs @ 1.530
There must have been a change in the production of the springs about 2-3 years ago. Since the used springs test stronger than the new ones.


New BC1100, right out of the box
80 lbs @ 1.530
 
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