the shreksta

iTrader: (20)

as i want to up the power on my blob wrx i need to get an idea of which turbo to look out for and which up-pipe is best

i like the instant power from my td04 but its got no mid-range punch so ideally i would like an early-ish spooling turbo with plenty of mid-range grunt,not to bothered about massive top end power as its only a daily driver

aiming for between 320-350 bhp

djwa

Im in the same boat in the new year either vf34/35 and sti up pipe + remap

b16msu265

iTrader: (6)

Djwa is spot on, vf34, 35 and sti up pipe. Get some pfr7b spark plugs as I had an issue with my old wrx.

Or td05 16g would also be a good option, don't go for a 18g it's to big unless u have done the internals.

Vf35 are about £300-400 for a good one.
Td05 200-300
Sti up pipe 40
Pfr7b 38-45
Sti headers £80-100

the shreksta

iTrader: (20)

not worried about internals as its fitted with a sti engine.what about tgv deletes, fuel pump, boost solenoid, fpr and maybe a boost controller?

sonic93

iTrader: (16)

Vf35 very quick spooler good for your goals. I would say your standard up pipe be fine mate less you can get a ported set cheap. Sti injectors , walbro pump , exhaust , decat,what ic u got? 3 port boost solonoid and jgm to map but you prob got half of this aint ya

the shreksta

iTrader: (20)

already got de-cat down pipe and de-cat center pipe with full 3" system,sti top mount intercooler,jgm is a bit far from me which is a shame

sonic93

iTrader: (16)

It is a shame sure he wil come near you sometime soon. What box you got?

the shreksta

iTrader: (20)

yeah it is a shame,im gonna get duncan to live map it i think

i have a standard 5-speed box but lets not go there as im considering a 6-speed or just take the isk with my 5-speed and if it goes pop then so be it

MrNoisy

iTrader: (28)

WRX engine would be fine on an 18g anyway.
It's the 5 speed clutch and gearbox you may have to worry about, although if you don't go around launching it everywhere chances are it'll be alright.
The 5 speeds, like clutches, get killed by torque not power. 350ft/lbs should be ok (bearing in mind comments above) but anything above that I'd consider a 6 speed.

3 port boost solenoid will help, and uprate the fuel pump to a 255lph item (unless you want to go bigger power later)

If you have an STI engine with STI heads and AVCS you don't have TGV's so forget that one.
You also don't need an FPR, I'm running nearly 400, and am about to go with an SC42 and I still don't need one (been told this by a specialist and JGM).
Save your money and use it for stuff you do need!

STI top mount, with as few bent fins as possible is also well worth doing, with bigger scoop and undertray to match.
Good panel filter (if you don't have one already) - Green, K&N both decent choices.

Brakes would be my first call. Standard 4 pots + 350bhp = new pants.
Turbo - I'd go for a 18g, front entry 16g or vf35.

vf34's tend to be overrated and overpriced but they frequently deliver similar power to vf35's so I never bothered and went from a TD04 to a '35 on my last car. I have to say it wasn't the massive increase in power I was hoping for, although it did go well.

16g's are great turbos and many make far better power and torque figures than their IHI equivalents, but you'll need a front entry one, or someone competent enough to modify a top entry one for you.

One of the best mods I did to improve spool and torque though was a Harvey 2 bolt up pipe.
They're no longer available new as the poor guy has passed away, but if you see a second hand one they're well worth an investment.
Back to back testing on mine with STI up pipe Vs Harvey up pipe, the car gained something around 8-9bhp and about 12ft/lbs IIRC, with full boost arriving around 400RPM earlier.

Would also recommend JGM over others mapping wise - and he travels btw.

djwa

This seems like a good bundle of parts considering its ebay http://www.ebay.co.uk/itm/newage-imp...21038784649%26

jura11

iTrader: (7)

Hi there

I can only recommend VF34 if you can hold,this turbo respond well on the WRX or STi.I never tried VF35 or VF43/48 those two 43 or 48 are best suited for 2.5L and what I've seen them on 2.0L WRX they're making good power(but never close as on 2.5L),but they're laggier than VF34 or VF35.

16G is great turbo too and you can hold this turbo for little money,some are already converted to front entry and conversion kit cost £70-£90 from Andy F

3-port boost solenoid people/mappers recommend,but this usually help mappers better control boost,if you can get hold off the Classic 3-port which can be best option

FPR,depends on injectors what you will be running,,but still if you will be running STi Pink injectors you don't need FPR

Fuel pump yes would suggest HRC,I've run this fuel pump at 490bhp without the problem

TGV delete,depends what Inlet manifold you are running,if you are still running WRX inlet manifold I would suggest to do DIY TGV delete,but some STi has been equipped with TGV too

If you are running STi engine,assume you have AVCS blanked off or you are just running yours existing(WRX) heads on yours,just due yours WRX ECU can't control AVCS

If you are running AVCS,its different story



Jura

MrNoisy

iTrader: (28)

Not bad, but:
1. The top mount from a Hawkeye STI doesn't fit blob or bug models as it's wider, as a mate found out recently.
2. I'm not 100% on this, but I'm fairly certain the EJ25 engines take different spark plugs to the EJ20's.

The turbo would work though

MrNoisy

iTrader: (28)

Jura I'm running 650's and Simon said the standard FPR will be fine.
Unless they're different between WRX and STI I'd leave it alone.

I'd also recommend the HRC's - got one on mine too
Unless it's 2.5 (or foreign) engine he shouldn't have TGV's - according to most none of the EJ20 STI UK engines had them.

Your questions re AVCS are a good point though - it would be interesting to hear how the STI unit has been wired in and mapped...

the shreksta

iTrader: (20)

cheers guys for the help-i dont think ive been clear enough

its not a full fat sti engine its just the bottom end,basically the bottom end went on the standard engine so it was taken to powerstation who fitted a brand new sti crate engine bottom end,they fitted it with a high flow cosworth oil pump and subaru metal head gaskets @ a cost of £3700

a quick breakdown of the spec so far is this

2004 wrx with sti bottom end (done around 34k)
de-cat downpipe (miltek)
de-cat center section with resonator removed-3" bore
jap-speed backbox
sti top mount intercooler with no bent fins,fed by larger sti scoop
cosworth panel filter
hks ssqv dump valve
pf6 plugs (i am getting pf7 plugs soon)
standard td04 turbo
ecutek remap @ powerstation @ 1.3 bar boost 270bhp

regarding up-pipes,mine is standard but is it 2 or 3 bolt? i dont want to buy the wrong one then have to change the stuff it fits to

brake wise i have powerstation porsche 6 pot calipers with new ap rotors and brembo sport hp pads with new fluid and uprated rear discs with ebc ultimax pads so stopping is not an issue

the shreksta

iTrader: (20)

also regarding the tgv deletes i will use a full manifold to do this

Infected by sti

iTrader: (6)

Uk Sti DO have tgv's, maybe not all of them but can assure you they do run them as they are on the uk blob Sti of mine

And I'm pretty sure you will find the hawk intercooler fits other models too, just removed a hawk Sti tmic from a 98 type r v limited in favour of fmic

And I'm also running 800cc injectors along with an lm450 and that needed a fpr as advised by the mapper as it was leaning out top end even on the 800's and is marked on the rolling road printout where the lean spot was and written on the sheet it states fpr needed

All on standard engine running 453/446

MrNoisy

iTrader: (28)

Yours will be a 2 bolt up pipe mate.
Personally, I'd recommend removing the dump valve and going back to recirc as I've seen so many cars being mapped at SRR have stalling issues with the HKS valves; seems to make the engine hunt more when it's idling

Brakes - LOVELY very envious lol.

In that case, I'd say yes go for an STI manifold to get rid of the TGV's, good panel filter and 7's, and then perhaps a VF35, or like Jura says, a 16g - they're good little turbos from what I hear.

If you have a bit of cash to spend, SC36 billet would be great on your car I'd imagine and should see at least 360bhp on vpower

MrNoisy

iTrader: (28)

Well mate, I don't know what to tell you - I hear from JGM that Bug and blob STI's do NOT run TGV's.
Personally, and this is of course no offence intended to you, but I take his word for it and have no reason to doubt him and he probably sees a lot more of these cars on a weekly basis than either of us do in a lifetime

Hawk intercooler didn't fit my mate's blob WRX, they're slightly more narrow but longer. I've got a side by side shot of a bug STI and Hawk STI one if you don't believe me. You're comparing a classic and a Hawk which are very different cars indeed!

Lastly - who was the mapper as I'd be interested in hearing more there on the FPR....
Don't forget - this guy is going to be running about 350/360 due to his gearbox so he will absolutely not need an FPR; BUT he will need injectors - which most of us have forgotten! LOL

Shreksta - 550 pink injectors - add to the list

I'm running 382 on 650'S on mine and fuelling is spot on.

If it comes to mapping my SC42 and Simon says it's leaning out, fine I'll look at an FPR, but as you said yourself you're into the mid-high 400's, which is another step up again, and I'd probably need bigger injectors for that anyway.

the shreksta

iTrader: (20)

mine runs fine with the hks valve mate

so i need to find a 2 bolt up-pipe.............sti one maybe?

yes the brakes are awesome

im liking the idea of a 16g,can get one from here

http://www.andyforrestperformance.co.uk/16307.html

Infected by sti

iTrader: (6)

Jgm mapped it bud according to last owner, I bought it in current state and i am adding my own bits to it along the way

I'm not sure of the intercooler problem tbh, first I have read that case scenario but aint been on the forum long so perhaps someone has had a similar experience, only commented on the ic as it came from a hawk and went on a classic so from that I would imagine it to fit a blob as there is not a lot of difference between the bug Sti tmic through to the hawk, from what I can gather they are slightly larger but fitting wise all is the same

And the tgv manifold is on my uk Sti blob as I was gonna do the removal mod before I changed cars, the jdm cars don't have the tgv's I believe they are all 1 piece manifolds, is that perhaps what your thinking?

the shreksta

iTrader: (20)

yes i will be looking for a cheap set of injectors,how much to get them flow matched/tested? some 650cc ones have just come up for sale on here nice and cheap

MrNoisy

iTrader: (28)

No probs if you want to keep it mate, just bear in mind if following the map you get problems like that, putting your old recirc one may resolve it for you

Yes the Andy Forrest ones will be good, and normally make good power.

the shreksta

iTrader: (20)

what about sti up-pipes? all i can find is 3 bolt up-pipes

Infected by sti

iTrader: (6)

And I agree with the fpr at that level of tune, had my old uk Sti as far as it would go with the stock turbo at 345 an everything was sweet on that side of things, 550's will see you circa 400hp give or take a few ponies, would defo need to step up further with a sc42 like your going for to unleash the full potential of it , and even a fmic as your on the limits of use much after 420 give or take on a tmic

Sti up pipe is a good upgrade for a wrx to remove the cat an Is a direct fit

MrNoisy

iTrader: (28)

I'm virtually positive UK STI's don't have em.
I have a Euro (same spec as Type UK) and it has no TGV's.
Steve (The Gimp)'s 2002 bug STI has no TGV's, and two of my mates on a local forum with Type UK's don't have them either.

My mate who bought my old WRX went TGV-less and he just put an STI Type UK manifold on to get rid of them!
Where are you getting the idea yours has TGV's from? Can you see the harness for the motors on your manifold?

Fitment for the Hawk intercooler hoses etc IS the same, but the cooler itself is too big and fouls on the turbo heatshield.

Infected by sti

iTrader: (6)

I've seen them advertised, worth a punt at that price IMO
Just a bugger about the flow charts, just ask for as much info and pics as poss and make a decision from there

the shreksta

iTrader: (20)

would they fit my car tho? ive no idea if my car is side or top feed

Infected by sti

iTrader: (6)

Honest mate it has them, can clearly see the motors and the separate part of the manifold with the wires

MrNoisy

iTrader: (28)

3 bolt up pipes are for GT Spec headers mate and won't fit yours.

As said above, a standard STI one will do, or a Harvey one if you can hold of one.
Hayward and Scott also do slip jointed ones, but tbh I'd say the standard STI one would be alright if it's in decent nick.

You'll get a CEL when you remove the EGT sensor in the WRX up pipe, which you can either do a resistor fix with or get your mapper to get rid of it.

Injector-wise, 650's would be OK - overkill but should work alright.
If they came as a set from the same car I'd just fit them, but that's just me.
Otherwise, STI pinks are going for as little as £80 at the moment.

MrNoisy

iTrader: (28)

I'd speak to Simon if he mapped the car, but I'd be surprised if it's running that power with TGV's!

Funnily enough, I wondered the same a few months ago and asked the question:
http://www.surreyscoobies.co.uk/foru...d.php?p=468932

Posted by James @ Greenwood Racing Developments: