How to get 400ish bhp??
 

Hi,

First post on here!

At the moment I have a EVO 8 Sitting at around 400bhp/400torque.

Getting a bit fed up with the EVO and have looked at buying a Scooby again.

Have been looking at a 2003 WRX what mods would I require to reach 400bhp? and what is likley to cost??

From a WRX?

A lot!! Not economical!

From an Uk STi,

Still quite a bit, but you wouldn't have to worry about pistons, rods and the gearbox etc...

From a JDM STi.

Not so much.

I'd speak to someone like David at APi for advice.

Ns04

So with the wrx I would need to replace rods and pistons etc?? So what the max you can get from a wrx??

I forgot the sti had forged rods and pistons. So what kinda mods would I need??

At the mo I would have around 2-3 grand to play with:thumb:

btt for some help:luxhello:

I`m no expert yet, but you`ll need a re-map/ fuel pump, turbo back exhaust for starters, but this will get you nowhere near your 400, in a WRX i think it would have to be the forged route for 400/400....but that`s only my little knowledge, i`m sure someone will correct, but i`m trying to help you...:thumb:

Cheers Staffi.

Thought the STI was a forged set up already???

How do you like the Scooby compaired to the Tommi Mak??

With an STI you would probably need:

Decent Exhaust with sports cat or de-cat
Maybe uprated fuel pump and reg
A slightly bigger turbo (lateral performance MD 321 H or T, H for around 400 and T for around 450)
Re-map
Possibly a FMIC would be a good idea aswell.

For a WRX the weakest point would be the gearbox so would either need rebuilding with PAR/PPG gearset or fit a 6 speed sti box

Yes, STI`s are forged.....


Different cars taylor obviously, the RA is mental upto about 130, it`s quicker then the Mak was and that had 379bhp as you know. It`s mapeed @ 1.4 bar 320-330 but only weighs just over 1110 kg..:eek:

I just prefer the Subaru if i`m honest, they have character IMO, but i`m not slagging the Evos off still awesome cars. Hope you get sorted mate.....:thumb:

So the sti is the way to go then??

So really all i would need is:

Exhaust system
Induction kit
Fuel Pump
Turbo
and a remap or ECU??

And maybe a FMIC.....:thumb: :thumb:


Why the change mate??? bored same as i was with the Evo??

Yeah I had a classic shape Subaru b4 the EVO but neva modded it. Like the EVO but just gettin fed up with it, so looking into a few options and the Scooby seems to be a good option!

A nice STI then mate would be a good lace to start...:thumb:

Yeah bored!!:sleep:

So this lot
Exhaust system
Induction kit
Fuel Pump
Turbo
FMIC

and I would be sorted?? What kida ECU? Or is a ECUTEK good enough on the Scooby??

Yeah im on the look out for one but aint seen anything as of yet. But no hurry, im sure 1 will come along. whats the running costs like??

Ok to be honest, not that 4.5k Mitsi service everytime, fuel wise i`m probably about the same as the Mak, but in my opinon Subaru are that bit cheaper to run...kiss of death now...:lol1:

Have you tried looking on Pistonheads??? is yours up for sale yet??

No not up for sale yet mate. So how much is a decent sti?? Thats good to hear didnt think it would be anymore!:Whatever_

You won't get a definite 400 hp from an STi or a WRX for 2 - 3 grand. Double that and you are in the ballpark.

You''ll need forged pistons, steel rods IE a rebuild in which case crank bearings, cam belt gaskets, etc etc. so about £2500.00 + Fitting
A clutch and flywheel capable of 400hp. @ £500.00
Stainless tubular headers. @ £400.00 for ones that work.....
3 inch decat exhaust. @ £400.00 + fitting
GOOD induction system. @ £125.00
Bigger injectors @ £300.00
high pressure fuel pump. @ £100.00 + fitting
BIG turbo MD321H is my choice. @ £1300.00
FMIC @ £800.00 fitted for one that works properly
and a remap @ £500.00

PLUS VAT

No doubt a few will get on and challenge those figures, but to be done professionally with people who know their stuff and get it right, that's a ballpark.

Remember, mates who work at Subaru dealers who moonlight will work for a drink, which professionals cannot compete with.

David APi

Thanks mate!! I can do all the fitting work myself.
I was under the impression that the STI wouldnt need new rods and pistons??
How far can you go on the standard internals then??

Not a bad price really:thumb:

03 onwards JDM will make/take 400 - but without any safe headroom. My own one gets the treatment and will show 400 on a dyno. Great fun to drive and if I break the engine - so what?

But to do that for a customer the risk is a bit high.

The STi 'forged ' pistons aren't really forged in the Cosworth / Omega sense of the word. They are still a good piston, but are original equipment compromise-type forgings that serve a purpose. 400 is possible but still with no safety margin.

AND 03 onwards STi pistons are ' hyper-Eutectic ' which is a posh word for Bullsh*t castings. They won't take decent levels of boost [+1.35 bar ] without fracturing ring lands and failing. Sti 7 JDM are the last fitted forged pistons in the manufacturers sense again.

The rods on 03 onwards STi are Ok, much stronger than anything previous But I cannot yet find any data from us or friend/competitors that suggests a safe limit for standard 03 rods. Fancy being a test pilot ?? I thought not:lol1:

Call me sometime for sensible chat about what is achievable with your budget.

OR even look at my late model cars for sale in case something tempts you:nono:

David

You may be bored of the Evo because it is characterless, but the work required out of a Subaru 2.0 to get a narrow power band (twin scroll, VVT or 2.5 excepted) 400 BHP is costly in comparison to the £200 or so to get some Evos to c.400 BHP with full boost at 2500 RPM :D

Thanks very much David, you have been really helpful.

You dont fancy a EVO 8 in exchange for the Black sti??:cool:

how about
APS top mount
APS exhaust decat
APS cold air induction
fuel pump
re map

around 2.5 to 3k fitted price
mine runs 365bhp 360 torque

budgie

That aint bad I just need a scooby first mate!!:luxhello:

you will need to pour some cash into a wrx to get it to safely run 400bhp !! if you are selling an evo8 why buy a WRX ???

how much you got?

budgie

Powerstation do a 400+ package on the JDM new age (twin scroll model cars) for 2.5k ;)
If its one of Iains cars with the miltek exhaust then you wont have any problems, will run pretty much 400bhp with the turbo upgrade, upgraded injectors and a couple of other minor bits.
Also not known one JDM Twin scroll engine to let go, they are very strong considering they dont have those dodgy cast pistons ;)

Tony:)

Well said tony.

Your car is living proof of that Gussy ;) and very nice too :D

Tony:D

Prob my EVO 8 and a couple of grand. But not in rush can save a bit more if needed!

What kinda price for a JDM then?