Hi There.
As I'm gonna rebuild my engine soon, I'm thinking about a new and bigger turbo then the current t03 I was using till now.

Can someone explain to me what the advantages and disadvantages are when using a:

T34, T35, T38, T40

I know that most of the time, how bigger the turbo, how bigger the lag, is this true, and is there something to do about the lag.

The engine I'm planning to build has the following specs:
- new oversized (+1mm) low comp Mahle or Cosworth pistons
- most likely my current 205 block (bored) with the current crankshaft
(offcourse balanced and grinded/refaced)
- arp studkit for the crankshaft
- all bearings new
- new oversized piston rings
- new 4-layer WRC headgasket with standard bolts
- rebuild cilinderhead (which is 1mm under minimum thickness after flattening, therefor low comp.)
- rs500 intercooler
- greys

The plan is to reach about 400bhp.

Any tips/ideas about which turbo to use, with how much lag?
(*Ideas or suggestions about the engine rebuild are also welcome offcourse, as I'm no professional)