STi Inlet manifold into UK turbo

[Otter]

Hey everyone :action-smiley-065:
Can someone please tell me whether a 1998 STi red top will simply swap for the inlet manifold of a 99/T uk turbo. Also, will the UK injectors swap into the red top..or does it require larger capacity jobbies? Any help appeciated.

Andy :biggrin:

[scoobyDAZZA]

check where the coil pack sits

on 97 sti they are in the middle
on 00 they are slightly to the right

not sure on 98 or 99 though
but if they are the same then it should fit no problems

[The Daddy]

97 is phase 1
98 is phase 1.5
99 on is phase 2

it will not fit as the head dimensions from one side to the other are different....it also uses a different tps.......

[Otter]

Thanks for the info dazza and daddy,i'll be leaving that one then :sad-smiley-046:

They don't surface very often do they:confused:

Andy

[The Daddy]

why change???

[Otter]

Mmm, good question. Don't they come with a larger throttle body and bigger injectors than the standard UK inlets? I presumed that this would be better for when I buy a turbo capable of holding more boost. Would it be a better option to simply put some bigger injectors into my current inlet manifold...or don't I need bigger injectors at all lol :smile:

[The Daddy]

you need to do the pump first.......no point having a big hole and no preassure to flush through it..........your tubo is capable of 300hp........

what is your spec????

[Otter]

Daddy, Already have an uprated fuel pump fitted + FCD. I run nur spec r system and a 3" decat downpipe. Profec boost controller at 1.1bar gave 258bhp but no extra mapping whatsoever (intepro said the fuelling was good, slightly rich at top end). The tmic is fine as i think you said before. Obviously the next step is a turbo unit but what one is the best to opt for? Some poeple say VF24/25 or TD05. I'm sure mine has a TD04 as standard. Do these uprated units require larger injectors or a different fuel pressure regulator?

Thanks for you're time and info.

Andy

[scoobyDAZZA]

it's the turbo that is holding you back
get a vf24/28/34 or td05 as you mentioned
550cc injectors and you'll see 340 ish bhp with a decent map

no need to change inlet manifold ,i didn't but did the above,i went for the vf34 , and i make just short of 350 on the rollers with the standard uk internals

[scoobyDAZZA]

to add , i haven't got a FPR

[The Daddy]

vf 22 for ultimate power.............

[scoobyDAZZA]

agreed but alot laggier than the other vf's
ok if you can keep it in the power band , 3800 rpm +

[Otter]

Thanks mates :) , so the list is a vf34?, 550's and mapping...are new headers required with this set up?
Also, any idea where the best value place to get the vf34 and injectors from? I heard that australia is really good for turbo units?!

Darren, you would recommend the vf34. Because of its drivability and ability to hold boost (340bhp @ ? bar). Is the vf22 just an undrivable beast with huge lag?

[The Daddy]

i had the vf 22....got just shy of 400hp without nos and there was naff all lag......boost came in at 3500rpm and pulled hard.........enough to do a 12.1 1/4 without nos.......

anyone who has been in the car will tell you it has minimal lag.....

but it depends what you want......if you are dragging.....vf 22

if you are looking at twisties then vf24........

wouldnt bother with headers, alot of cash for 8-10 bhp........would spend it on an apexi ecu........ 340 on a vf34 is pushing it to its limit.....the vf 22 will take 400hp......

[Otter]

good, i've been looking at turbo prices and can get a brand new vf22/24 from america for $795. The vf22 has roller bearings but the vf24 does not. Does this make a great deal of difference? Both of these turbo's are runnable (?) on the standard internals of my 99 UK? And are they both ok with the o/e TMIC?
Sorry Daddy but don't know your name, but thanks for the time and info:smile:

Andy

[The Daddy]

both will run on standard internals and will be ok with tm ic......but i would reccomend the pro alloy front mount as an upgrade.......

im not clued up on your make of boost controller.....is it electronic.....???

if so you wont need remapping but an adjustable fuel pressure regulator set to 3.2bar atmospheric...

hope this helps..

[Otter]

It helps alot thanks!

My boost controller is a GReddy PRofec b II, electronic job, bost being changed by an inline solenoid.



if so you wont need remapping but an adjustable fuel pressure regulator set to 3.2bar atmospheric...

Yeah, I was reading threads about these £600/£700 tek maps people are having done...but surely they only raise the rev limit and adjust/increase the fuelling accordingly, also iron out the power curve. They still have to confirm with the o/e ecu, MAF and lambda sensor readings don't they. A new ecu, completely removing the MAF etc would be a far better option than one of these remaps wouldn't it? The uprated fuel pump and pressure reg will be sufficient for the fuelling...only downside (?) being the rev limit is standard (not that you need more than 7k rpm anyhow).

I will get a FMIC with this set up for sure, just have to decide on which one. Money is not flowing too well at the mo. so i'll get the bits up together gradually..then fit em' all at once:biggrin:

Thanks for the help mate:smile:

Andy

[bob]

I had the Tec 3 on my Type R but was limited to 350 ish BHP was told by mapper the MAF was at its MAX. Olly also has about 350 bhp and he says his MAF is Maxed out. Yet I still hear storys of scoobs using Tec 3 with 400+ bhp I just do not know how they do this..:confused: I converted to an Ultronic ECU which does away with MAF and uses MAP, mapped conservatively at 380/380 for the mo.

[Otter]

Yet I still hear storys of scoobs using Tec 3 with 400+ bhp I just do not know how they do this..:confused: I converted to an Ultronic ECU which does away with MAF and uses MAP, mapped conservatively at 380/380 for the mo.

yeah its interesting about different peoples power. Rolling roads do vary somewhat, so this could be one of the various reasons for the differences?

Thanks Bob:smile:

[scoobyDAZZA]

exactly

my maf is maxed out at 348 bhp not the turbo(VF34)

i will be going for a td05/18g with Link ecu in the near future though
unless i get the 2.5 conversion,then i'll get the td05/20g :)
the Link ecu does away with the maf

[Otter]

Darren, whats the difference between the vf34 and the TD05 18g/20g? I take it the the 18/20g is the weight of something, a compressor wheel maybe? But, is the vf34 a smaller unit than the tdo5's?

[scoobyDAZZA]

it is smaller bud
they both spool around 3000 rpm

but the td05/18g is so much better built yes,it is the size of the compressor wheel
the 20g is very suited to a 2.5 , the 18 for a 2.0

the 18g on a 2 litre has made over 370 bhp :)

look here http://andyforrestperformance.co.uk/16307.html

[Otter]

Christ:eek: Didn't realise there was so much difference in the size of the actual turbo units i.e. td04 and td05.

Looking at these, i think my best option would either be a TD05 18g or the vf22. That means that I won't have to re-upgrade at a later date:wink:

Good info thanks:smile:

[bob]

Had the VF34 when I was 2.0 nice cheap turbo but what you call a throw away unit. (any probs chuck it) I now have the TD05/6 20g suited to the 2.5. I get 1 bar of boost at 2600rpm full boost at 3000rpm. I know a few lads with the TD05 18g and they all speak highly of it getting about the same boost times as the 2.5's.

[bob]

Darren, whats the difference between the vf34 and the TD05 18g/20g? I take it the the 18/20g is the weight of something, a compressor wheel maybe? But, is the vf34 a smaller unit than the tdo5's?

Have a look at turbo's here you can see differance in turbo's and BHP.

http://www.scoobyclinic.com/frameset.htm

[scoobyDAZZA]

you'd get more power with the vf22 but IMO driveability is what you want so go for the td05/18g
then its clutch,gearbox,fmic,induction,brakes,suspension etc etc etc , never ends
:lol:

[The Daddy]

just bought a gt45..........this is a big turbo.......

[Otter]

then its clutch,gearbox,fmic,induction,brakes,suspension etc etc etc , never end

Flippin heck, I thought that the standard gearbox would be fine, also the clutch:confused: . Already have coilovers and induction luckily, plus the brakes arn't too bad at the mo.

But as you said, it can be an ongoing list with modifications!!!

[The Daddy]

you'd get more power with the vf22 but IMO driveability is what you want so go for the td05/18g
then its clutch,gearbox,fmic,induction,brakes,suspension etc etc etc , never ends
:lol:


sorry but i dont agree........i have driven most models of impreza and it comes down to the driver......i managed to waste a type r on the twisties when i was only pushing out 290 hp, and i ****ed on a new age sti import on the strip with the same hp..............

compressor has nothing to do with it....it is measured by the size of the turbine......the a/r rating gives you its value......the bigger the a/r the more bosst the turbo will prodece at higher rpm, but will spool slower than a smaller a/r rating turbo...the vf 22 is .71 a/r...and is good for 400hp.....

the gt45 i have bought is 1.05a/r.........this is good for 1000hp.....

i never had a problem with my maf maxing out but i think that later ones sent a different signal but im not sure on this..........

[Otter]

Daddy, do all of these turbo's run off of the standard 5 bolt flange, and so, are direct bolt ons?

...and, do you run a different ecu with your set ups?

thanks

Andy

[The Daddy]

i dont run a different ecu as such that it is still a subaru ecu.....its from a type r....they are all 5 bolt flanges....