Subaru engine and gearbox

[Dasco]

the standard uk gearbox will handle 350bhp
you say you want 350-400bhp if thats what you want dont use a uk turbo engine
get yourself a import sti type r engine and gearbox as you start with 280bhp as standard
much easier to get 400 from this as engine and gearbox is much stronger
As a minimum i recommend forged pistons
and steel rods, steel head gaskets and uprated clutch.
a dected exhaust and airfilter will get you over 300bhp
a bigger turbo, injectors and a remapable ecu will cost you around £2000 but will get you to 400bhp
i would also upgrade the intercooler as a lower charge temp will help you achieve higher bhp
But bhp is not the be all and end all its the torque you want aswell
have a chat with this guy hes one of the best in the tuning business his site will give you some ideas for power aswell

http://andyforrestperformance.co.uk/4436.html

[blaise27185]

Dear dasco Thank you for your information
However I would like to ask:
when you speak of the standard gearbox you mean the standard STI version or the standard 2.0 l turbo which is normally tuned to around 210 bhp
thank you

[Dasco]

the power your after use the import sti tyre r or type ra engine and gearbox DONT USE THE UK ENGINE OR GEARBOX EVEN IF ITS A STI

[Tidgy]

getting a reliable 400 isn't that easy. and tbh not much of a jump from 400-450

have a look at www.scoobyclinic.com, they do an off the shelf sc450, which is running roughly 450bhp and 480ftlb.

the gearbox wont cope full stop. at that sort of power you need a new age 6 speed or a 5 speed ppg gearset (whats in mine).

all in all, including clutch your looking at about 12 grand + vat.

getting 400bhp and reliable aint easy by any stretch

[Tidgy]

Originally Posted by Dasco

the power your after use the import sti tyre r or type ra engine and gearbox DONT USE THE UK ENGINE OR GEARBOX EVEN IF ITS A STI

new age sti block should be ok ish for 400, steves been runnging that for a while now.


o other thing is your gonna need to invest in some other upgrades, like front mount, oil cooler etc etc

[Sean Hath]

Before you put your hand in your pocket and seek a 300+ bhp engine......

Do you know the approximate weight of the kit car you intend to build, and if so what bhp per tonne do you want?
Will a standard Import sti engine be enough for a starting point?
You're not keeping a 4wd set up - so are you going to first uprate your differentials and drive shafts?
I'm not sure you'll need 300+ bhp in a car that weighs under a tonne, with rear wheel drive in a tubular space frame chassis.
Comparitively a Caterham 7 CSR 200 has a kerb weight of about 600kg, has a normaly aspirated 2296cc engine, a bhp of 200 and (using the only comparison league I can think of right now) it - as I remember, lapped the top gear track ahead of the likes of an AUDI RS4, a Mitsubushi evo VIII , and many more 'supercars'.

I'd buy the kit, put it all together with a standard lump from an STI import perhaps, get used to the car and take it from there. Twelve grand is a shed load to spend on an engine - which might not suit the car.

[blaise27185]

Well the kit is based on a toyota mr2 (1992) donor car and will have all the parts from it except for the chassis body panels and glass. The kit body is made of fibre glass.
So I estimate that it is a little bit lighter than a toyota mr2 but will still weigh in at around a tonne