turbo AR

For a 400+ ci engine id definately run a T6 rear housing of some sort. Something around the .96+AR range would work well.

The engine will flow a **** tonne of exhaust gas, and remember you are trying to shove it all through a single cast housing (running twins you could get away with smaller T4 units) . Too small of a housing and your exhaust temps will be through the roof and you will be choking the engine.

My advise is to do some research on how to read turbo maps. And go from there.. Choosing the right turbo is just as important as the right convertor or camshaft.

I've got a 76mm turbo with a 1.05ar T4 on my 360 (not yet running) and I'm looking at stroking it now. So a turbo upgrade is in the future.

Need to know anything else feel free to pm me :)

Wardy