Turbo experts? Please review this spec!
 

I have a turbo from a Volvo 240 engine I built a few years back for a race car. The turbo has low hours on it, and MIGHT do for my FD3S on an HKS cast manifold. Here are the specs, what do you think? I want to make 400 RWHP on pump fuel, with an air to water I/C and Power FC , maybe Motec M4 later.

Rotomaster TO4B-RM10

S4 compressor trim with O turbine trim

Exhaust A/R .58

Compressor A/R .60

None divided, not water cooled, external wastegate.

Thanks.

it's a T04B, thats a good start, its exhuast housing is too small, i am pretty sure the compressor is too small aswell

you need a larger exhuast housing if you want to make 400rwhp on pump fuel, in the range of a 0.96A/R single entry or larger

The 240 is a 2.3l four, right? Redlines at roughly 6k too.

I don't think it'd work well on an engine that moves air like a 2.6, and has a much higher redline, unless you really REALLY want low-end boost while sacrificing high-end power.

Thought it too much to hope for :-) The 2.1 (B21A) engine it ran on was all steel, made 350 BHP on pump fuel and revved to 8500. Was actually in a street car here in the UK. Big cam, blow through Dellorto sidedraughts, a bit crude but was TOTALLY reliable and I learnt a lot from building it (mainly that carbs are not good for pressure fed engines in a blow through config, and i should have saved longer and injected it...).

Thanks for the reply, I have PM'd HWO re his reply. Cheers have a good weekend!