i have the ER rockers for over a year now, i shift @ 6000 and i have not changed the valvesprings. 105's are not needed for these springs, this isnt a high revving DOHC motor so i dont see the point of revving this engine to 40,000 rpm with just rockers and springs as a valvetrain upgrade. the LS engines run 90* springs and make over 400hp why would a piss ant 3.8 need a giant valvespring for? valve float? soon as a valve floated the motor would blow. valves dont just float one time and go back to normal, more Grand Prix forum urban myths.... install your rockers, make sure you clean the oil out before you torque down the bolts and enjoy your new top end
/thread!
