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4GTuner

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Maybe to suit a stock cam setup

Dont seem too heavy duty compared to others

These Ones = 1.560" @ 70 lbs / Open: 1.120" @ 200 lbs / Coil bind: 0.980"
Brian Crower = 1.550" @ 84 lbs / Open: 1.000" @ 235 lbs / Coil Bind: 0.935"
Farrea Beehive = 1.496" @ 90 lbs / Open: 1.102" @ 225 lbs / Coil Bind: 0.905"
Supertech Dual = 1.559" @ 92 lbs / Open: 0.453" @ 247 lbs / Coil Bind: 0.972"
 
^^^^ Thats Allen from Performance Springs in QLD. Those are h/duty valve springs custom made to suit 10mm lift and 9000rpm for 4G63 engines. In fact, he specially made them to suit the Crower 280 cam specs I gave hime a few years ago. They are h/duty single springs with chromoly retainers and based on the SR20 valvesprings which have high lift and will more than suit bigger than OEM cam grinds easy. There's more to the lbs rate vs lift and bind measurements than what you think. You dont want your valvetrain stressing too much due to a hard spring compound either. Im using the exact same set in my engine conversion and for that price its a frikken bargain! :)
 
God, don't buy it. They are shit house quality! I just had one fitted to a gearbox for a customer. Needed extensive modding to fit into the Eclipse box like it was meant to bolt into. Shit quality, poor casting, the first one came in the box with a crack form end to end. My advice...stay well away!
 

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