ukimpreza

iTrader: (9)

well im a bit stuck on which charger to get, ive got a 96 impreza 2000 currently with full cat back exhaust, induction kit. im in the process of buying tubular headers and uppipe, front mount intercooler, yellow injectors, decat downpipe, 255 fuel pump, and if cash will allow apexi or similar ecu. need advice on turbo been told a td05 or a af but seems alot of different af ones about. any advice would be appreciated

joz8968

iTrader: (13)

Don't need tubular headers if only using 440cc yellows. A set of harvey's OEM ported ones and matched uppipe are proven to give good spool for anything under 400bhp.

Out of your mods listed - and assuming you have a quality, proven FMIC - then those 440cc inj. are indeed the limiting factor i.e. will give about 320-340. I'd opt for a 2nd hand VF35 - great value for money, quick spooling turbo and should easily give 320-330bhp; but 340+ if you get lucky...

Billet

iTrader: (60)

td05 is also a good turbo and has the same properties as the vf35, ie, same spool, power etc, is also a cheaper option than the vf35, however i don't know whether you would have to get it converted to front entry or not. not a 100% sure but i don't think you have to get it converted for a 96, as front entry started 97 onwards.

jameswrx

iTrader: (4)

I'd check what turbo you have on there, don't the early Uk turbos run td05's STD?

ukimpreza

iTrader: (9)

been told it a td04 on it, i still gona go with tubular headers so they are on for any future engine mods, and was thinking harveys gt2? fmic

joz8968

iTrader: (13)

If it's a MY96 UK car then it should have a top entry TD05H 16g, whether saloon or wagon.

If a MY97 UK then, yes, the std turbo is a front entry TD04L.

Post a pic of your engine and VIN plate, and we'll tell you for sure. Also take a photo of the turbo's comp cover with the model info on it, if you can....

If a MY96, in that case, may as well keep the top-entry TD05 (or replace your 'wrong' TD04 with one ), as it's a 330-350bhp turbo - similar to the VF35 in performance, anyway.

If a MY97, then easiest fitment is the front-entry VF35 (although, if you went for a TD05, it's not hard to create a 'top entry' 90deg feed with silicone/joiner...)

joz8968

iTrader: (13)

harvey's Hybrid GT Spec2 is a proven choice, yes.

ukimpreza

iTrader: (9)

ukimpreza

iTrader: (9)

will post pic of turbo later after took some pipework off. couldnt get a clear one of vin plate

joz8968

iTrader: (13)

Don't worry about the VIN plate - that's a phase 1 engine, so you do have a MY96 then.

As said, the MY93-96 UK saloons and wagons were fitted with a TD05H 16g, so you'd really need to try and get a pic of the comp cover info - to see if it is one - or if someone has replaced it with the smaller TD04L at some point....

ukimpreza

iTrader: (9)

yep you guys were right took some pipes off and turbo plate says td05h on it. good job i asked the question as almost just bought one anyway. thanks guys.

joz8968

iTrader: (13)

That's brilliant! Means you don't have to get a different turbo, for your supp mods. Cash in the back pocket and all that...

krisando

iTrader: (2)

Sorry for the hijack, would a vf28 or vf34 be better, with 550 injectors, hybrid top mount and JGM simtek remap? Looking for 300-350 bhp.

joz8968

iTrader: (13)

VF34 all the way. Assuming the Hybrid TMIC can flow enough for well over >330, then get the VF34, as it can do more than that: up to 360!

If the TMIC is limited to c.<330, prob best to save cash and get VF28.

Both turbos spool really good. The 34 has roller bearings, so despite being bigger, is not far off the VF28's spool time.

krisando

iTrader: (2)

Thanks joz, cleared that up!

ukimpreza

iTrader: (9)

means money saved for more mods :-), poss 550 injectors then,

joz8968

iTrader: (13)

I would, yes. Give the turbo the chance to make the 340+ it can. 440cc won't.

Of course, it won't mean that you're guaranteed to get 340+, but at least the 550cc won't be a source of a bottleneck. Plus you'll have some great headroom re the fuelling on 550s for your mods, so won't have to worry about transient leaning issues...

harvey

iTrader: (48)

Hybrid TMIC. I havn't come across one of these so they may be a little bit like hens teeth.

You have a TD05 with 90 degree entry and with the right mods you will get this to around 330 bhp, maybe a bit more and both the turbo and yellow 440 injectors will max out about the same place.
Tubular headers would not be a good choice for this application and if you did go tubular headers you would need the special 3 bolt uppipe to get reasonable bottom end response but it would future proof you if you were going to take your standard engine to the limit of an 05 20G turbo but my experience is you would be better with ported headers and matched uppipe for what you are trying to do. For a start it is a lot less money.
If you are going to change from your existing turbo because you want to go beyond the 330 bhp target you will have to go to a front entry turbo and the work that entails along with 550cc injectors or bigger perhaps if you are going for an 05 20G.
You have to decide whether you want to get the best out of what you have or spend a bit of money to go to the next level. If the latter then you need to lift your inlet manifold to fit an inlet tract or accept a 90 degree entry on to one of the following turbos. Second hand VF34, not always easy to find a good one, new TD05 18G. Good power, good value for money and hardy all round turbo. £675 at present or an 05 20G which will take you in the direction of 400 bhp.
Unless you are going for the 05 20G I would not bother with tubular headers.
FMIC for your application depending on which kit you want £290 or £335, ie Hybrid GT or Hybrid GT2.

joz8968

iTrader: (13)

lol Well, that's what I thought too.


But member did post this:-

I'm assuming it's a typo, though...?

krisando

iTrader: (2)

Did find a hybrid tmic, however im not paying over £1000 for it, so may be hyperflow top mount or japspeed, we will see!

joz8968

iTrader: (13)

Hyperflow considered one of the best I think...

ukimpreza

iTrader: (9)

my plan is to get around 330bhp but keep it future proof so i dont end up buying everything twice.