ScoobP1

iTrader: (1)

Looking for a turbo to take me to around 350bhp but not much higher. Might like the option of going to high 300's at some point but not over the 400 mark.

Looking for excellent spool and good mid range. What are the best options for a suitable turbo for my needs.

I was looking at a SC36 but is there anything else. Guess billet would be the way ahead as well?

Tidgy

sc36 billet, full stop.

Or if on a budget second hand vf35 or 34.

MrNoisy

iTrader: (28)

I wouldn't recommend a vf35 unless on a budget like Tidgy said; I've had two cars with them and found in both cases they were a bit gutless, lacking in both mid range and top end and not much notable improvement over a TD04. In short - disappointing.
vf34's tend to be overpriced given what they deliver IMHO and can usually at least be matched, or sometimes outperformed by a decent 18g for less money from my experience.

SC36 is a nice turbo but a lot of money for not huge power.
You can get billeted 18g's from alternative manufacturer for a lot less money, and with that you've got the option of a FMIC and more top end later if you fancy it.
A mate made 376bhp on his after his vf34 was delayed twice following an insurance pay out.
Companies like AET or Turbo Dynamics sometimes rebuild units with billet compressor wheels so might be worth a thought or two.

You could look at billet 20g turbos, but your username suggests you might be in a P1, so your gearbox might not like it too much...

ScoobyDoo69

iTrader: (17)

VF43 will be up to the job. Cheap enough too.

Comboflip

Sc36 would have to be brought brand new .vf35 we found them really awesome on a classic probably the best readily available turbo but don't think they make 350hp on average .18g if you want 350 and more

ScoobP1

iTrader: (1)

Was really thinking this turbo would be perfect and seen one 2nd hand that I nearly went for then was too slow and missed out.

MrNoisy - yes, it's a P1 on a standard box so not wanting to push too hard. Thanks for the input.

Are they ball or journal bearing? Quick spool?

Cheers mate.

MrNoisy

iTrader: (28)

Laggy and poor too given it's designed for the 2.5 engine.
18g will be better on a 2.0.

ScoobP1

iTrader: (1)

Any thoughts on a AFP5-20 billet?

Seems a good price at £1080 for a new billet turbo.

Tidgy

um, sc36 is 130 sheets cheaper lol

http://shop.scoobyclinic.com/index.p...product_id=127

ScoobP1

iTrader: (1)

But the AFP5-20 will not be at its top range making the power I want. Rated to over 400 so is in comparison with a SC42 or similar.

stonejedi

iTrader: (51)

What about a SC38.SJ.

Tidgy

but you dont want that, 42 will crack 420 and even up to 450 on meth. that will see off your gearbox and engine.

Think you need to take a step back and decide what you want mate, you want the smallest turbo that will do the power other wise you'll just build lag into the system.

I know it's nice to go for a big turbo , but wont make the car fun to drive if its massive and comes on boost late

the shreksta

iTrader: (20)

Vf48

maca1983

iTrader: (3)

VF35 with ported headers will see you to 350bhp and give that little bit extra torque you desire, then if and when you want to for more power source a better turbo. cheap and easy 350bhp

MrNoisy

iTrader: (28)

Vf35's as already mentioned hardly ever make 350 unless circumstances and dyno conditions are exceptional, and the power delivery is all bottom end with poor mid and top end in my opinion. Don't like em, the TD turbos are also more exciting to drive giving you more of a thump in the back.

I'd go for the 18g mate.
I doubt a billet 20g AFP turbo will make as much as an SC42. Mine is running 439bhp on V power only on an sc42 . It'll probably break 400, but break your 5 speed too...

ScoobP1

iTrader: (1)

Cheers again for the input.

A billet 18g from AFP is £995. I'll have a look around and see what the other option price up like such as the SC38 (cheers SJ).

I don't hear good things with journal bearing turbos for quick low down spool which is hat I want.

maca1983

iTrader: (3)

Ive seen a few VF35's make 350 with supporting mods (injectors, sti tmi intercooler etc..) , mine made 358bhp on my bugeye

ScoobyDoo69

iTrader: (17)

VF43 is not laggy at all. The exhaust housing is the same as the VF30 (P18.) Spool etc is similar to the VF35 and makes more power. The VF35 comes with a P15 which should make it spool quicker, but it spools too quick and gets surge in most cases and needs to be held back from boosting too much too soon.

My VF43 made more power everywhere compared to the VF35 I had previously.

MrNoisy

iTrader: (28)

Is that on digital dash or a proper rolling road with an experienced operator? If that's with TGV's I'd have to call BS I'm afraid.
Seen a lot of vf35's get mapped.
Saw one make 350 (my old one).
Most make about 320-330. That's at Surrey Rolling Road btw.
And regardless of what power it made they're still crap mid and top end lol

MrNoisy

iTrader: (28)

It'll make more power of course - it's a bigger turbo.
Spool will be the same - on the 2.5 it's designed for...
Asked JGM about one for a mate's WRX.
Response? It'll be laggy...don't forget the earlier cars and WRX engines don't have AVCS either

Most people get accustomed to their car.
I've run a TD04 and a vf35 on my old WRX bug (made 281 and 325 respectively...next owner got 350 on removing TGV's but EcuTek kept reigning it in), and a vf35, TD05-20g and now SC42 on my blob STI.
Even with AVCS the vf35 is a dull dull turbo I'm afraid. 20g was fun but the SC42 is mental. Don't need a faster road car at all.

the shreksta

iTrader: (20)

heres my vf35 graph @ rcm,mapped by duncan (race dynamix)

made 353.9bhp but more important is the 365+ ftLbs aswell @1.45 bar

brief spec

2004 wrx
sti 8 engine (avcs not connected)
vf35
rcm headers with venturi up-pipe
full de-cat 3"
rcm induction kit
rcm340 pump
650cc injectors
tgv delete sti inlet manifold
sti top mount
pfr7b plugs

MrNoisy

iTrader: (28)

Good result that; the torque will be from the headers, but regardless that's a very impressive result on a top mount. Your accompanying mods (fuel pump is overkill in particular) would suggest you're looking to take her further in future?

That's probably the best torque figure I've ever seen off a vf35. OEM ECU on open source or aftermarket?

the shreksta

iTrader: (20)

Yes I will be looking for more once my 2.1 gets built

Standard wrx ecu mate

MrNoisy

iTrader: (28)

Shame as you would probably see slightly more from Alcatek or Syvecs. The problem I always had with the OEM job is it makes great power but requires ECU resets to keep it performing at that level; the aftermarket ones don't.
To illustrate my car made 412 on EcuTek and literally a day later made 388 as the ECU was reigning it in.
My mate had the same problem when my old wrx made 350 - few months later was only around 325, yet ECU reset and back up to 348...!
If you're going 2.1 can't recommend an aftermarket ECU enough. And a better (bigger) turbo
Kenny on our forum is running over 500 on a 321V and a built 2.1

Henrik

iTrader: (5)

I used to have an sc36, and i found it to be a bit like a vw golf - capable, but SO boring. Great mid range, but ran out of puff from about 5k rpm onwards.

In contrast, my td05-20g (non billet) was way more fun with a huge thump in the back at about 3500rpm, and it kept pulling all the way to the red line.

TonyBurns

iTrader: (3)

Before we go any further, what has been done to the engine on your P1?

ScoobP1

iTrader: (1)

Original engine is fooked so new engine is a standard 2.0 sti8 short block and my P1 heads. I'll be using 550cc injectors and RCM 260kpsi head studs. Also have a newage sti TMIC that I'll be fitting.

Dmacnz

I love my billet td05-20G. on a 2L its amazing. still street able.. but getting scary

maca1983

iTrader: (3)

Unsure on the TGV front (it was an 01 bug wrx) and majority of mods were done just prior to me buying the car but it made 358bhp @ motorscope in north allerton when I was a member on tyne tees scoobies (club rolling road day), will be about 6 years ago now, wish I had the printout to put on but it went with the car.

scooblet

iTrader: (5)

SC36 on my type R, got to be honest its awesome! minimal lag and pulls hard... Bob said it was a quick car and i think its a good 350-360 power wise.