Got a simple question was thinking of 3.5 hr cams and valves plus gasket match and light porting, what do uz guys think it would add power and torque?

 

You can gain nearly 50 whp with just bolt ons, something I'd suggest before cracking open the engine.

HR Cams very slightly more aggressive (.04"), HR valves are slightly smaller than the DE. So, not sure you'd gain anything there, also, the heads are different, so, unless you're swapping HR heads, not sure this does anything for you.

The majority of the extra power comes from dual path intake, dual MAF's, CVTC on the exhaust cam, more aggressive CVTC map on both cams, better flowing heads & intake manifold, and of course all that is brought in unison with the ECU.

Little background on your current set-up would be nice to see where you're at.

 

what year and car is your 3.5 from?? mine is from an 03 & a friend told me 350z cam was a little more agressive. hr looks like it might be more trouble than its worth

 

RevUp's came with slightly more aggressive cams and is not an HR. But if i were doing cams, I'd want to make it count.