Just finished up the analysis and building charts for the magazine article. Short summary is that on this engine a wet sump with vac pump made basically the same power as a dry sump setup. So pick your poison.
The Wilson porting work on the Indy intake picked up a nice chunk of power. The gain over the unported intake was more than 30 hp at the top of curve. The unported intake was run on the dry sump engine while the ported intake was on the wet sump + vac pump combo.
So if you have an as cast Indy 400-3 and you are making around 750 hp, sending that intake to Wilson for porting should be worth 25 or 30 hp.
Andy when Wilson ported the Indy intake did they leave the clover leaf or change it to square flange?
Witch magazine is this article in? Thanks for passing your tech to us!