Quote:
Originally Posted by gazza808
No you can shim the seats of the springs too increase the poundage.
As he's still on hydro's too
Tbh I'll be going uprated with mine not because of revs but because of boost pushing the valves open. Seen it many times.
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That doesnt increase the spring rate, it will however increase the seated force on the valve/seat. You would also have to check for spring travel to see how much you could shim the spring.