bashman40

Hi guys I知 new to this forum just want to in introduce myself and ask a question on behalf of a friend.
I own a R34 GTR V-SPEC which will be hopefully be running about 600 BHP, finger crossed after my engine build.
A friends of mine has just brought a UK 2litre turbo (i think you call them 2000) impreza, I think its a 1998? aprox, he wants to mod it to gain more performance I知 not sure what sort of power they run standard??
What injectors cc are standard on this car? What sort of power can the standard fuel pump run? (Or litres per minute) what is the max boost the standard turbo run and what power does it achieve? , can someone recommend a few different types of turbos (direct bolt on) to gain different power levels (some sort of turbo power chat). What are the typical routes owners take to gain power (stage 1, 2, 3)
I知 sorry that I知 asking loads of questions and don稚 know anything about the imprezas just need to know what to advice him. Look forward to the replys.

bashman

dnc

std power for my98 is 215 bhp with 214 lb ft on a td04 turbo at maybe 1.1 bar. full decat and remap would see perhaps 280/280, pretty good with a quick spooling tdo4 and the light weight. This would be 227 bhp/tonne and should see a sub 5 sec 0-60.

Popular turbo upgrade is a vf35, capable of 350 ish bhp and quite quick spooling, though not certain the internals would be up for this for long periods. There will be plenty of threads on your questions, do a search. As a pointer a user on here, New Sccoby 04, did an excellent write-upof his experiences in getting a classic up to IIRC 330 ish bhp - try to find this thread, will give you lots of ideas.

You could also contact 1 of the many tuners on here e.g. Jolly Green Monster, who gives sound advice.

HTH

dnc

TonyBurns

iTrader: (3)

dnc I think youmean MY99 onwards there
The MY98 is 208bhp, ecu would need replacing for any major mods, top end is about 270bhp, some get 280 but its rare on these turbo's, as dnc has said, the vf35 is a common upgrade for turbos, you would require new injectors (380's standard so 440's or 550's would be required), brakes are really crappy as are the engine internals, with the engines good for about 350bhp max (and even then they can put pistons through the block).
Fairly expensive to get good power out of them, much cheaper buying a new age STI which has all the uprated parts you could imagine

Things that go wrong when tuning these:-
Clutches suck, torque kills em.
Gearboxes suck (5 speed), torque kills em
Brakes suck (my astra has better standard brakes)
handling can be a little.... well they grip well just dont handle quite as good.

Its an expensive base to tune unless you only want about 300bhp.
New age STI's are much improved as ive stated

Tony

dnc

Hey Tony I put that one in there as a 'tempter' for you .

To the OP, the above is sound advice regarding potential problems etc

Cheers,
dnc

TonyBurns

iTrader: (3)

Its late my brain doesnt work at this time of night

Tony

bashman40

Jolly Green Monster

iTrader: (4)

standard ecu on the 98 is not mappable

aftermarket ecu needed

Steve Whitehorn

iTrader: (13)

The P1 turbo is a VF28 - can get about 300hp -350hp out of it max
I ran one at 300/340

On the MY98 most have a TY752 box - these are the weaker box. Very late MY98s can have the TY754 box on which is far stronger and is a bit of a must upgrade. (I will have a TY754 with matching diff sat about at APi in a few weeks time as mine is coming out as a 6 speed is going in mine - so PM me if he wants it cheapo)

The MY98 was a bit of a cross over year from the old phase one classic to the newer phase two classic (even in the way it looked with its facelift bonnet but old style front bumper)

As has been mentioned the MY98 UK classic is not the best start point. And if I had my time again I would have bought another car as the platform from which to start my build. I should know better having been into classics for a long old while now.

ECU upgrade - Solaris and SimTek seem to be flavour of the month. But any of the mappers on here such as Jolly Green Monster or Bob Rawle will be able to give him sound advice.

In order my ugrades would be
Brakes - Godspeed or Ksport seem to be good value and work well
Suspension - The usual ARBs. droplinks ect

Ported headers - Harvey
Full decat
New turbo VF28 - VF35
3 port boost solinod
440 injectors
ECU - say SimTek
Walbro 255 fuel pump

Personaly I would stick in oil pressure and temp guages
SimTek detects knock through the check engine light
The oil pumps have screws that work their way loose - so a real pain but def worth replacing on a car of this age


Then Remap

And aim for a safe 300hp - I know people running more of standard internals but its an unkown as to when or if it will let go

In crude terms think of alot of that stuff maxing out at 350 and to be safe 300 is the target.
Over that it gets expensive - new internals, front mounts ect.

MY98 has a MAF - SimTek does not use the MAF so it becomes redundant.
Not too sure what the standard top mount will achieve though not certain it will make 300. So the front mount would be a good idea Autobahn is OK but Hybrid is the better bit of kit.

but not sure at what level the TD04 maxs out at (as it is all about quick spool) around 280hp ish I think.

hope this helps
Steve

bashman40

Thanks for the replies guys just a little update the cars actually a 1999 not a 1998 can the ECU be remapped? Does the 1999 have TY754 box on it?
Will be changing the-

• Turbo to a P1 turbo
• 440 Injector
• De-cat exhaust system
• Have the standard ECU re-mapped or changed to a Solaris and SimTek ECU
• 3 port boost solinod
• And a upgraded fuel pump will a Bosch 044 do the trick or will we need a Walbro 255?

Will these MODS achieve 300BHP??

Jolly Green Monster

iTrader: (4)

Bonus then.
Standard injectors are 440cc already.
Walbro 255 pump more than man enough.
Yes 300 no probs
Simon

Steve Whitehorn

iTrader: (13)

Yes it should have
TY754VN for a Uk car. Check on the plate under the bonnet.

bashman40

thanks steve i will check the plate when i see his car next.

so will the MODS listed achieve 300 BHP?

Aztec Performance Ltd

iTrader: (234)

Wouldn't choose a VF28 myself, look at a TD04 Hybrid from Andy.F if 300 is your target, the others VF35, TD05-16g will breeze 300bhp but are more like 330-350bhp turbos.

bashman40

Simon just seen your post thanks also for the reply yeah it痴 a bonus it痴 a 1999 and doesn稚 require injectors.
IL find out what turbo he has acquired and post back up here I知 not sure if he has been shafted?
As it痴 a 1999 it should have the TY754 box on it il check the plate under the bonnet.
So the questions i still have is can a 1999 ECU be remapped?

Splitpin

Yes, the '99 ECU can be remapped. Find your nearest EcuTeK mapper.

bashman40

Cool so all it needs is
Up graded Turbo, exhaust system including de-cat, cone filter, upgraded fuel pump and a remap and we are good to go for 300 BHP. Il post back with gearbox type and turbo model and see what the experts on here have to say.

Aztec Performance Ltd

iTrader: (234)

Cone filter isn't required, but I would probably fit a later TMIC on.

Splitpin

As has been said you don't need a cone filter and would actually be better off without one at that power level on a 99MY car. A good panel filter is the best option.

You may be alright without a fuel pump too, as the item used on the UK cars is as per STi5/6. However I would replace the pump, purely on the basis that the one you have is 10 years old and, aside from any capability gap, is likely to be nearer the end of its working life than the beginning.

If it's a 99MY it will have a 754 box, unless it has been changed. Turbo will be a TD04. As above, at 300bhp or thereabouts Andy F's TD04 hybrid makes a very, very, nice car.

bashman40

Just received a txt saying it痴 a TY754 turbo do these numbers make sense? Sorry I知 doing these blindly haven稚 got the car or stuff in front of me.
so whats the TY754 turbo all about his been told its off a P1?

Splitpin

Lol, I think you've got the text a bit mixed up (or your mate has). As above, TY754 is a transmission code, not a turbo type/part number.

Steve Whitehorn

iTrader: (13)

lol
Splitpin is right
That is the box code.
That box well I ran 300/340 through one no problem
300 is no problem on it
As you edge towards 350 you are begining to really push it
Over 350..you are probably on borrowed time.
All this is general rule of thumb stuff - as I know some that have run fairly big power through these boxes and have been ok - each box is different

Torque destroys boxes not hp. But on 300hp with the associated torque should be fine.

bashman40

Opps i should have spotted that, I think his txt was trying to say that it’s just me a bit slow 2day need some sleep was driving my skyline engine in knackered now. He has the TY754 box, waiting on a reply on type of turbo he has brought?

bashman40

i better slep i mite end up with more blunders on here lol

bashman40

These are the numbers my mates has found on the turbo he has brought
VE289810
RHFS 14171B 14411AA291
Do these numbers make any sense?

Splitpin

There are a number of misspells but enough to make some sense of.

That's a VF28 made in late 1998. RHF5 is the cartridge type.

That's the STi5/P1 standard turbo, good for 320bhp +/- a bit. Worth making sure it's in tidy nick before installing as it's obviously aged, and by way of example someone on here recently bought one only to find it was knackered.

bashman40

Thanks for that Splitpin i guess he couldn稚 read the small writing on the plate due to rust or dirt. I know what to advice him now.
I really appreciate the advice i got from everyone on this forum many thanks


I will let everyone know how we got on later on in the New Year.

TonyBurns

iTrader: (3)

Splitpin, does that mean for the turbo the vf28 then year and month of manufacture?

Tony

Splitpin

Yes, same as the MHI units.