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

Thanks for posting all your info over here. I just got done helping a friend order parts for his 2g rebuild and kept running into your posts on the DSMtuners and they were very helpful. Should be good help for a bunch of the guys on here.

I have a few posts on Tuners.

Glad they helped your buddy out!!