Many people have had great success with the 9.0 rotors. I've heard of people running the 9.7 rotors, but those are people who are VERY good at tuning.

hmmm. for fuel managment check my sig. I already have a big enough pump. The Haltech could take care of delivery along with the 1600 secondaries. FPR is a good idea, but implied. I plan on getting one for my 13BT. Of course, then you have stainless braided lines and and MSD6 ignition boxes. But like I said, that is just my dream "engine".



now that I think of it, a 20B conversion would probably be cheaper.

hmmm. for fuel managment check my sig. I already have a big enough pump. The Haltech could take care of delivery along with the 1600 secondaries. FPR is a good idea, but implied. I plan on getting one for my 13BT. Of course, then you have stainless braided lines and and MSD6 ignition boxes. But like I said, that is just my dream "engine".



now that I think of it, a 20B conversion would probably be cheaper.[/quote]

You don't HAVE to use SS braided lines to use an aftermarket regulator.

maybe you could use 9.2:1 rotors from an 84-85 13b, they are factory 3mm seals. the only downside is the rotor wieght, its like 12lbs vs 9.5? for the s4 and 9 for the s5,s6,s7,s8.



mike

i wonder if anyone makes aftermarket rotors? they could be lightweight and have different compression ratios (11.5:1 ack)

Racing Beat sells lightened rotors, but they're stock rotors with material removed.