Iowa Chapter Director
Join Date: Jul 2002
Location: Ames, Iowa
Hey, sorry I didn't see this sooner, I don't look here much anymore.
If you want to do the max possible go with a direct-port system. You can piece them together pretty easily. I did. I think Supersix said they had cylinder head lifting issues at 200shot. That was also with ARP head studs torqued to 100lb/ft. That same car also ran a 125shot perfectly fine in to the 10's in the 1/4mi. I think a 150shot would be fine, that's the most I would go if you want to keep the engine in one piece. Maybe torquing the heads a little more would keep them down, who knows. I wonder if there's room to tap for larger head studs...? Mine is capable of 250hp but I'll be running much lower compression, and I don't think I'll use more than a 100shot.
1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner