Do I need heavy duty valve springs?

[Nate Dogg #76]

My 04 engine is stock except for hrc kit. Just installed a Dyna Tek ignition and this thing revs. Do I need heavy duty springs for my set up? Thanks for any help

[Sjorge450R]

nope. you are set to go. No need to change out the springs quite yet.

[GIXXER1KR]

I wouldnt be worried about the springs if your revving the old 04 stock lower end.Just be careful its a hit or miss with the crank failures....

[Colby@C&DRacing]

I would change them some of the those maps rev pretty high. Springs are cheaper than the alternative:(

[bloodmoney23]

well im running high comp piston and hrc cam with the same ignition. You will be fine leaving valves and springs alone for a little. I would def get your head done though. you dont start seeing the gains from the dynatek untill your engine is done up so much. I dont even really notice any gain yet.