rsjohn

iTrader: (3)

Im hopefully getting a 2006 JDM impreza sti at the weekend and will be looking at taking the power to around 450bhp.


Whats needed to get this please?


Which will be the best quick spooling twin scroll turbo?
After market ecu?
Front mount intercooler needed?
Breather kit needed?


thanks

Tidgy

an engine rebuild would be a good start.

Rob Day

iTrader: (78)

I've just put a MD321V twin scroll on the car and I am impressed, but its on a 2.5 so its not apple for apples so I wouldn't like to say this is the right choice for you.


The standard ECU will handle what you want, but obviously Syvecs is the preferred option if funds allow.


Yes front mount at that power although some have claimed to have had over 450 on the TMIC. Depends what you are doing with the car, if track days FMIC, if not maybe you can get away with TMIC and accept whatever the power is you achieve safely... 400 is generally the rule of thumb on a standard STI tmic.


4 bar map sensor maybe, CAI kit, Walbro/RCM Fuel pump, de-capped or larger injectors, 3" exhaust un restricted, and you might want to consider Meth mix to bring temps down and increase power

Rob Day

iTrader: (78)

They can withstand that sort of power if they are healthy, but I agree it can be a gamble and most likely on borrowed time.... how much time anyones guess...


Ran three UK engine cars over 400 with no issues, apparently the JDM's are stronger and rev to 8k

rsjohn

iTrader: (3)

Engine has only done 31k miles.


What cc injectors?

Rob Day

iTrader: (78)

I think some (myself included) have ran the standard pinks with a fuel pressure regulator, but I think 450 is a big ask. I would imagine 740's would be ideal, but best to wait for an expert to come on that knows more.


ps - as I said before I'm sure you can get the pinks adapted to flow more which would be a fraction of the cost of a new set

Tidgy

its a gamble, you may get away with it, i dont know many tuned that high that last very long.

2006 jdm's have switched over to hyper what ever it is pistons, not full forged engine.

Read here,

https://www.scoobynet.com/scoobynet-...gine-spec.html

last proper forged sti engine was was the bug sti.

Rob Day

iTrader: (78)

All valid, but my experience has been good. 432 from a standard Blob UK lump with no issues, granted it didn't have much time in my hands before I sold it, but the car is still going strong.

Ran a bug uk at 413 with no issues, and another Blob over 400 with no issues. All were relatively low miles 40-60k

RAGGY DOO

iTrader: (1)

Twinscroll sc46 or similar
800 cc injectors
3 port
Off you go

Rob Day

iTrader: (78)

Lol, sounds a little short Raggy We don't actually know the spec of the base car, but safe to assume it's standard. So also: 3" Exhaust (believe 2.5" might be at its limit at 450??) CAI or at the very least a K&N panel filter if it will support 450, and a decent fuel pump.

Standard ECU and maffless remap... Now your away!

Tidgy

400 and 450 are different kettle of fishes

RAGGY DOO

iTrader: (1)

They’re a Jdm
Leaderboard thread on here loads of Jdms of all years making 450-510 bhp no issues
I made 431 and then 455
Car ran terribly and still didn’t manage to kill it
Tough as nuts these Jdm cars are

Tidgy

very few are still running though that the issue

JDM_Stig

iTrader: (3)

I wouldnt be throwing any cash at a 2.5 unless it is forged, it is such a gamble,
Id rather have a standard bhp 2.5 with forged engine, that a 400 bhp one on standard pistons.

RAGGY DOO

iTrader: (1)

This is a Jdm thread mate 2.5 doesn’t belong in here

Rob Day

iTrader: (78)

Why does it always turn into an argument? 400 - 432 - 450 are all different. These very varying numbers change the choice of parts used, for example 400 is achievable on the STI TMIC, 2.5 exhaust, standard pink injectors etc etc, yet 450 in my experience is not. The other point is chasing numbers isn't always the right thing to do, I know as I have done it many times and jeezz I'm still doing it covertly in my hatch . When I achieved 432 on the rollers in my blob I was pleased as punch, I was only hoping for something over 400, plus it was in the summer!


Yes 400 is much easier to achieve and safer than 450, and I am sure the owner will weigh up the risk and reward. But then 450 isn't all that difficult to get with the associated risks of running such power on a standard engine, however many have done this successfully to much higher levels - but as said before: for how long is "a piece of string question".


I'm done with commenting.


Robert.

SmurfyBhoy

Could blow up quite a few tho before your even close to the cost of a mighty clinic build.......

As you have been told before you will find the majority go forged in the chase for even more,

"NOT" because of failure

But because 600bhp is a whole other kettle again.

How many stockers could i blow up at 450 before I'm anywhere close to the cost of a mighty Clinic build, and how long would this take....

Although if you had to pay clinic to fit em every time then obv that kettle is different too

SmurfyBhoy

You will also find that most of them fail through rod bearings, so the whole "forged" from factory thing is almost irrelevant although great for pub talk,

Handy if your doing just a rod job rebuild i suppose

some proper info on the 207 can be found here,

https://forums.nasioc.com/forums/sho....php?t=2385141

Tidgy

jealousy doesn't become you, you mention clinic more than i do

SmurfyBhoy

Substitute with RCM, RA Motorsports or another household scooby spannerer.

My point is the same

RAGGY DOO

iTrader: (1)

Always the debate on here with 2.0 v 2.5
The proof is in the pudding

rsjohn

iTrader: (3)

Ok so looking into the the turbo, a quick spooling one, id suffer a bit of bhp to gain spool?

Tidgy

Sc42 would be epic

rsjohn

iTrader: (3)

How much are these roughly?

Tidgy

Not sure on current prices, check out scoobyclinics website