Just been wondering over the last week or so what is the best impreza to buy if u want big power, now that i have my classic ive got to a stage were if i want anymore big power it is going to cost alot, eg gearbox, maybe new engine if not rebuild, eg 350 +

so back to the question
what is the easiest impreza to tune to get big power

 

The cheapest platform to start from would be a bugeye STi .... cheap as chips leaving maximum cash available

Shaun

 

Spec C is supposed to be better, but I agree with Midlife.

DunxC

 

but then the cost of getting a spec C would be more than getting an impreza and then getting the gearbox and rebuild?

 

thats what i mean, what impreza first had the 6sd box and what impreza has the strongest engine as it aint the classics, would it be the 2.5l hawkeye

 

Anything is possible but a simple decat on a 2.5 hawkeye will see you 360/390 with remap. Has to be the easiest way to 'big' numbers especially the abundance of torque. Big numbers aren't everything though, I like the way my classic feels to drive and 330/310 in a classic is a nice place to get to

 

I do like white cars

SUBARU IMPREZA WRX STi VERSION 7, JDM IMPORT, SUPERB! on eBay, also, Subaru, Cars, Cars, Parts Vehicles (end time 20-Aug-08 20:00:00 BST)

Way too pricey but as I mentioned Bugeye STi probably cheapest but as 53WRX says not actually the "easiest"

Shaun

 

The best base to start from has to be the 2.5l in the Hawkeye.

G

 

would agree with being the bugeye STi, strong motor for tuning to 400+ and above and came with the 6 speed gearbox (i think)

 

i think it depends on how long you plan on keeping the car once its tuned, because you'll never get your money back so you will have to think about that.
If money is not a question then id suggest finding a nice classic GC8 shell and having a nice EJ25/257 built for it, id estimate in the region of about 5-8grand would see you well on your way to 400+ BHP with stupid amounts of touque.
I went for the EJ25 conversion in a classic and have never looked back, its absoulutely brilliant puts a huge smile on my face(well did, sodding thing wont run atm, lack of use and neglect for a few years)even when it gets going again although i've dropped in power from 390/400ish its still going to put a grin on my chase.

GL mate

 

Having built a standard MY99 UK Turbo 2000 into a 500bhp road car I can categorically say that the cheapest platform to start from is without doubt the Bugeye STI. Its has all the bits to start with gearbox etc and the chassis is far better for big power.

A classic with 500 of each is very raw and a handful to say the least.

 

Wooo ! Another vote for the bug-eye.....

LOL

DunxC

P.S. Mine's only heading for 400-ish and at last it feels lively !

 

Bugeye STI for me... but then i would say that

Might be for sale soon though

 

If you want to be really mad:

Buy one classic with good body but with a blown engine (plenty of them about ).

Then buy a cat D/C Japs-eye with the 2.5, so long as damage is cosmetic/chassis only (rear ended or roll-overs being ideal- no front enders) and transfer everything out of that onto the classic (Drivetrain,brakes, EMS, etc).


Best of both worlds

 

I have a Blobeye with a TwinScroll, and 370/370 is acheivable on the original Turbo. But after that you are limited, unless you get creative.

FOR THE BEST VALUE, I would also say the Bobeye STI7, as most cheap bolt on turbos are single scroll.
But, there are variations of STI7. Although I would try and get a UK car, with the longer gears if you do lots of motorway and the Prodive bodykit version if you cannot find a cosmetically modified standard one.

 

The newage spec-c's are very strong out the factory, mine has been running 430bhp on standard internals for over a year now with no trouble at all,

 

The actual engines in a SpecC are no mechically different to the JDM 'GL' model of the same year.

Obviously, that does NOT include the pump, Turbo and inlet.

 

Apart from the forged pistons ,the cross drilled niterided crank, cams, valves etc you're correct

 

Like Hol says, standard JDM Gl's or STi's come with what you talk about daz.

 

Newage STi are pretty strong from standard aswell.

 

goign to get involved in this, so the bugeye sti has been getting soem votes due to the gearbox and can handle more power but what about its engine? it i sstill only a 2.0ltr so in what way is it stronger than the 2.0 in the classic sti? as if it can handle the same power then surely a 6 speed conversion to a classic sti will be cheaper than the the difference in purchace price between the classic and bugeye?

what power can the bugeye take on standard internals? and what can a bugeye spec-c take?

steve

can you tell i am lokking to get rid of the uk turbo

 

Spec C engines get better valved heads and larger ports.

They do not have forged pistons. They have hypereutectic cast pistons. These have a very high silicon content giving many properties of a forged item but without the noise and oil use issues.

A newage JDM engine is by far the strongest from the factory and has the most potential for tuning whilst staying with standard internals. They get:

- Nitrided crank and a stronger valvetrain allowing for an 8,000rpm redline
- More aggressive inlet cams and larger valved heads (Spec C slightly larger again)
- Equal length stainless headers
- Twin scroll turbo (VF37)
- More efficient intercooler design with auto spray

Spec C models get a larger turbo inlet hose, uprated water pump, roller bearing twin scroll turbo (VF36), dedicated oil cooler, transmission oil cooler, a rotating chamber, anti-surge fuel assembly and a 12 litre boot mounted I/C water reservoir.

Then you have the S203, S204 and RA-R models which came with a blueprinted handbuilt engine with balanced and matched internals, a larger roller bearing twin scroll turbo (VF42), Grp N spec STI turbo inlet hose.

 

When I was into get a 2nd remap from AndyF, he said he had 2 customers running ~500bhp on the standard Spec C engine internals. One of them for 2 years.

 

and my 2004 sti uk is running approx 450bhp on standard internals (depends on rollers).

 

The Spec C has the same heads as the standard STi on the twin scroll. What the Spec C does have is a more aggressive map for the heads. So simple mapping mod when mapping a JDM Sti is to give it the Spec C map.

 

Wasn't it the JDM bug that had forged pistons and the JDM blob that had hypereutectic?

 

IIRC that is correct.

 

so is it the JDM bug or Blob?
with the SPEC-C being even better?

what power can they both take?

 

Can anyone tell me if you can just "drop" a full 2.5 hawkeye or 2.0 blobeye engine into 94 classic?

Or is there lots of issues like gearbox, etc????

 

Sorry Daz,

You stand corrected! Mines a pint!