[cgeise]

Originally Posted by Travis Q

We run Turbonetics 91mm BB Thumpers, and have never had an issue. We also run over 100 lbs of oil pressure, we use Royal Purple Nitro 50 engine oil. It is the cat's meow, for sure! Our oil inlet lines are unrestricted -4AN. Never an oiling problem, no turbo problems at all.

We use the boost control that's built into the XFI system, it works great. And yes Curt, I do control boost. A little bit. LOL!! In all honesty, I think we can make close to 50 pounds with these units, then we're going to run out. We leave with a lot, and try to make boost as quickly as we can, and use clutch, gear ratio, timing, and fuel to control power. With an engine that's only 480 inches with two big turbine wheels, we have learned that you are fooling yourself trying to control boost as a means of controlling power. We have to make boost quick and keep it there. Otherwise, the engine "falls off the turbo", and it's hard to get it to recover. If the engine were larger, or we had smaller turbine wheels like a GT55, we could probably utilize boost control a little more.

On the flip side -- I do use gt55 turbine wheels on my 88s and control it with an AMS 1000 -- PROB APPLES AND ORANGES with an auto vs a stick . I dont know if the extra 45 ci makes a lot of difference? And its to damn much work swapping convertors - so we control boost a lot