Well I have had engines in the past and bolted turbos to them which to be fair work well but are within the limits and arent particularly responsive or strong.

I have been told by a few tuners that you need to decide turbo spec and then spec an engine to suit..... I am planning on a rebuild/spec change so that canvas is blank (obviously if I can use existing parts as much as possible then it'd keep costs down but that'd be a bonus...if it needs changing to suit a responsive turbo setup I'll change any component necessary).

I am trying to determine if a roller bearing turbo of this size is a viable option for a very responsive setup @ 400bhp....The whole t34 and std engine just doesnt float my boat and IMO would be good enough but I'm not going for big power I just want to make full use of a sensible (bank manager still breathing) 400bhp from my engine. Final spec etc... would all be discussed with my tuner, I just like to know & understand the theory myself before I approacha tuner with an idea to discuss.

I think that 1.8bar is not 1.8 on the graph like you show mate...I make 1.8bar equal to 2.8pr (or26.46psi)...


so thit turbo is very close to its limits at that...possibly get it within range with a diff exhaust housing but I'm not sure.

Dan