parteepro

hi guys I'm after your valuable knowledge again

I really want to upgrade my turbo I have a 2008 sti with a vf48 turbo, I've had a forge engine rebuild, and the turbo has a crack near waste gate, the subaru specialist has had it on the dyno and its only making 310 bhp, he said its down to the crack.

Quoted £1600 for a sc46 which I've heard are brilliant, but just cannot afford that at present.

Would the td05 be a good replacement or am I wasting my time.

Should I do any other mods before going down turbo route as in getting an induction kit.

All answers to my questions are much appreciated

boosted

Hi, TD05 is the cartridge/footprint size. There are many options of TD05-
16g, 18g, 20g available in 7cm and 8cm housings and the like

gazney101

iTrader: (5)

You could try a subaru specific gtx28r which will be in the same league as a sc46 but a lot cheaper

parteepro

Td05 20g would be the one

boosted

Cool, that's a 7cm exhaust

parteepro

So will a gtx28 r be better than the td 05 are they as reliable etc, does anyone know are they both just direct bolt on

gazney101

iTrader: (5)

Gtx28r is a 450hp turbo with a dual ball bearing core and billet wheel, its light years ahead of a 20g.

There are bolt on versions of this turbo but you will need to shop around to find them, as for reliability the tdo5 20g and all garrett ball bearing turbo's are very reliable

fez the plodder

I'd give Alan or Martyn at engine tuner a call about a turbo technics T36

96sti

Was you at surrey rolling road on friday

harrisard

iTrader: (6)

I was

MartynJ

Quite right, the T36 Billet sounds like just what the man is after.
450bhp capable and only £900 + vat inc the fitting kit.
It's only available through us so feel free to give Alan a call on 01752 345880 or email alan@enginetuner.co.uk

96sti

I was there to had mine mapped contact stu at tfs racing mate hes onli
round the corner from the rollers

parteepro

Hi guys no wasn't at rolling road, great info as usual, t36 who makes it, I will indeed give the guy a call to discuss many thanks again guys.

Did some more research today and it also seems that a Garrett turbo may suit.

parteepro

Should I go ahead and get an induction kit fitted before hand either a cosworth or Perrin

MartynJ

The T36 is made in the UK by Turbo Technics. It's a custom unit available in two sizes. 2 litre and 2.1 strokers are taken care of with a small exhaust housing, 2.3 or 2.5 engines with a larger exhaust housing.
We've been heavily involved with the development of them and we have fitted them on lots of our engines.

MartynJ

Perrin is a very nice piece of kit.

MrNoisy

iTrader: (28)

Before you do any of this, you say the engine has been forged, but what about the block itself - have you had inserts to make it CDB, or had it pinned?

Many say the 2.5's, forged or not, start to run into trouble much above the 400 mark, with 450 being about the max "safe" level which is around where you're saying you're planning to take this. Might be worth a further discussion with some tuners before putting your money down, or room for thought at any rate.

The other thing is - where is the crack in your turbo? Have you seen it?
The vf series are known for having cracks around the penny valve, but these don't typically prevent the car making power unless they're very bad.

MartynJ

We've ran plenty of stock blocks to 450+ without issue.
Whilst I agree the CDB modification has it's place, I'm not sure it's reqd in this particular case.

MrNoisy

iTrader: (28)

Interesting to hear Martyn - when you say the CDB mod has its place, do you mean more for high stress applications like drag or track cars?
Is the main limitation the amount of boost you can safely run on the 2.5 versus the 2.0?
TBH if that is the case I'd be interested in seeing what my SC42 would do mated to a forged 2.5 as I'd expect it to remove virtually all lag!

MartynJ

Yes that's exactly the case.
The SC42 might be a little small on a 2.5 in terms of having a nice long curve but it'll certainly spool well.

MrNoisy

iTrader: (28)

Haha, the spool was what I was thinking about .
So what sort of boost can would you typically run safely through a 2.5 then?
On my 2.0 STI, it peaks at 1.65 bar tailing off to 1.6 on the graph.
Could you run more than that on a forged 2.5 block (I'm guessing uprated pistons rods and headgasket?) without any other mods to it?

parteepro

I have decided not to go above 400 bhp and have been looking at a Garrett turbo, do you guys know which one I should be shopping around for.

Also how easy is a perrin induction kit to fit on my 2008 hatch, would I need to get it mapped after or could it wait until the turbo is fitted, as I want to get the induction kit this side of Xmas then turbo after

MartynJ

You'll be lucky to get a genuine Billet Garrett unit from anyone in the UK for less than SC quoted you for the 46.
A direct fit GTX2871 hybrid would do you but it won't be cheap.

MartynJ

I'd wait till you get it mapped before fitting the induction kit as it'll need the airflow meter rescaling.

MrNoisy

iTrader: (28)

Sorry to hijack the thread a little but any chance you'd offer a thought on this Martyn?
I'd be interested in the answer as I prefer V Power 100% of the time instead of running meth mixes

MartynJ

I'd normally cap a stock linered car at 1.7 bar for daily use which should see you make some really nice torque on a 42.

p1junkie

iTrader: (5)

just had a drive in chris.s t36 and it spools mega early and pulls fantastic
dont know what happens after 80 as i rarely venture above this but i checked the defis and 1.5bar came up in a blink of an eye
tbh that was with moderate right foot application certainly if you had a heavy foot a neckbrace might come in handy its that good
makes my old sc46 on a 2.5 seem like a slug