new heads part two ....

[blackmike]

By putting VK heads on a VH engine you'll gain 62 HP is this true ...or not what are the up's and down's to this ...and where to find the vkheads ... whats wrong with saying lol

[ScottJackson]

I had no idea they could be swapped (and still am doubtful) but if you really do gain that much hp just with the head swap, I'd say any and all the gain would be from the different cams that come on the VK heads. Anyone here got the specs handy for both stock VH and VK cams? One thing that's for sure, the cams in the VH are tiny and there's a bunch of higher rpm power to be had with more aggressive ones. Probably more cost to get cams made than to add a turbo or nitrous and less power than with forced induction, but if you don't want to go forced induction or nitrous, getting the cams reground would be a great option for a lighter car or even a Q with higher stall converter.
Modified by ScottJackson at 8:05 PM 7/30/2007

[maxnix]

Did these wizards say why they thought this gain might be true?

Smaller valves on the VK. Continuous Intake and Exhaust phasing by the OBD II ECU on the VK, but different chain drive mechanism. VK is an open deck design, while the VH is a closed deck design.