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Originally Posted by Rico55
does anyone know the answer to the above stated question. because i am interested to find out if the stage 2 cams from zex(in. 268 duration + 11.43 lift and ex. 278 duration + 11.53 lift) really need a valve spring upgrade. any help would greatly be appreciated. TIA...
p.s. i know the list says that it can be used with stock valve train but, i went to nipponpower.com and the website reccomends a valve spring upgrade just want to be sure before spending any money on a product.
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Rico, I'm considering the same cams. I think Comp Cams went a little overboard on the exhaust cam specs (probably because Zex is selling them and they want to push nitrous use). I was thinking the intake cam will be fine but exhaust cam scares me with stock valvetrain.
