LVTony

Smarty started adding rail pressure in Beta 4.4 (the mileage Beta). It has less power than Beta 4.2, but still a lot, plus the levels weren't really graduated. It started out at like 130 HP in level 1.

jrussell

4.2 and 4.4 had exactly the same max power on my truck. Only difference was the reduced TM of 4.2.

LVTony

Are you sure that 4.2 #9 didn't make more power than 4.4? I was sure that most people could make about 20-30 HP more on 4.2 maxed out.

Definitely different TM. IIRC, Bob said 4.4 was based on "mild."

Did you already have your twins when you tried them out? (I definitely have to upgrade soon ).

jrussell

That's what the dyno and the track said. I still had the stock turbo at the time, so maybe I was out of air? Didn't seem like it though because the smoke was clearing up at WOT.