Id call Dave. I believe someone tried VForce at Dynotec and they lost hp?
Interesting, thanks 1badho.Jim @ Dynotech did a ported and piped Z not long ago that lost a couple of hp with the v-force. This was due to the lower airflow cfm they were getting from the v-force. They got more power out of the stockers.
http://www.dynotechresearch.com/file_uploa...RMachZreeds.pdf