weeebell

iTrader: (1)

I cant decide which turbo to get before my remap in January.

I.m looking for around 330-350bhp with

Full Decat exhaust from turbo back 2.5” bore
Decat uppipe Pre turbo
Walbro 255
K+N panel filter
550cc injectors
Uprated turbo to intercooler 'Y' pipe
NGK PFR 7B uprated spark plugs

I had a VF28 on my classic and it was great but would the other two make more power?

Whats the difference between the TD05 16g and VF35? Which is best???

G.Mac

iTrader: (2)

TD05 16G taken from Andy Forrests website

AFP5-16 - is based on the 90 degree inlet TD05 16G from the 93-96 cars and can also be converted to front entry to suit 97 onward cars. This turbo is very popular on installations aiming for up to 340bhp. It is available as a fully re-manufactured unit or new. This turbo will typically spool up to 1 bar boost by 3000rpm and full boost by 3300rpm.



£320 exchange or £600 new outright (includes 12 months warranty)


VF35I have a VF35 fitted as standard on my car (2005 STI UK) and with my mods (See My Scooby) I am on 1 bar of boost by about 2700 - 2800 rpm with full boost of 1.55 bar by 3000 - 3100 rpm, the car with 10% methanol was running 370BHP and 360 lbs- ft torque. Bearing in mind that my car has AVCS heads and different crank my car is worth approx an extra 20 bhp over say a bugeye STI I was told by AndyF at time of mapping.

I will be trying to push the limits of the turbo early next year to try get 400BHP or over out of the car with the VF35 before changing up to a larger turbo (As I have a bet on that it cant be done!!!)

Either Turbo should see you comfortably arround the 330 bhp mark

hope this helps somewhat

Graeme

sy.

iTrader: (8)

bang for £££s i would say the vf35 as can be had for good money also consider a vf34 like a vf35 but with ball bearing design so improved spool, over all though a tdo5 16g is going to be stronger than any ihi turbo long term

movi-star

iTrader: (1)

You've got that the wrong way round, VF35 has the quicker spool up and the VF34 has better top end power.

Both great Turbos for decent money.

Tidgy

afraid your wrong mate lol

the spool is very similar or slightly better on vf34 (but not alot)

they are both based on a vf30 turbo, the vf35 has a smaller exhaust housing to increase spool up, but this reduces top end, the vf34 is roller bearing to increase spool without reducing top end.

in real world terms ratehr than on paper spools pretty much the same but you get 5-10bhp ish max extra.

is it worht the extra cost though is the question? depends on your budget and rest of the spec.

weeebell

iTrader: (1)

I thought all VF's were ball bearing?

99greenwagon

iTrader: (39)

vf35 had divided thrust bearing,and vf34 roller bearing.they are more less identical mate.

Joe2000

iTrader: (-1)

I was told by jollygreen monster that on my00 uk classic with
Vf35
panel filter
Full de-cat and 2.5inch turbo back exhaust
Walbro 225 fuel pump
ecutek remap
i was looking at around 310bhp max this figure seems a little low compared to what other people on here have achieved

Tidgy

tbh it varies from car to car, but if he said you get 330 and it made 300 you'd be gutted, by saying 310 then i think he's somewhere near the mark, but if it makes a few extra over that then i wouldn't be surprised, but on same note i wouldn't be surprised if it ran that either.

does that make any sence? lol

IainMilford

iTrader: (15)

347 horsies on a vf35 (newage though)

Joe2000

iTrader: (-1)

Makes perfect sense mate lol

New_scooby_04

iTrader: (4)

VF35 spools quicker than the VF34 mate, due to the VF35 utilising a p15 exhaust housing. Not much in it though. Deciding factor is often that the VF35 can be had significantly cheaper.

I'm running my VF35 without a DV with no ill effects so far. Latter VFs are much tougher than the earlier ones. TD05s are tough as old boots though.

Ns04

New_scooby_04

iTrader: (4)

He's probably erring on the side of caution mate.

Get some ported and wrapped headers and 550 injectors and I'd be very surprised if you weren't in the 330s

IainMilford

iTrader: (15)

you may want to think about investing in a larger intercooler than the stock one of you havn't already, makes a good difference and will help to increase power

movi-star

iTrader: (1)

Standard top mount IC will take up to 340bhp, so not really needed if aiming for 340bhp or under. Im on standard IC at 1.55bar of boost on a VF35, 18 months on and no probs.

One good mod which costs nothing is to remove the air box resonator inside the front drivers wing, I found boost increased, airflow intake increased and it makes a nice swoosh sound on acceleration.

Andy Hobson

This is great info as I'm planning a similar upgrade to my MY00 classic for next year. I already have ECUTEK and full decat giving around 265bhp and I'm looking for 330 with these mods:

VF35
Ported, wrapped headers & upipe
Walbro 225
Cold air kit
Uprated TMIC (if necessary)

weeebell - who is doing your fitting and mapping ?

Andy.

Pete

I have the VF34 on my Type R and i think it,s a great turbo tbh, good spool up, car pulls really well too, made 330bhp/331ft/lb too, probably has alittle more in it tbh if i had a FMIC and mapped again...

RB5Caterham

I've got a TD05 16G from Andy Forrest on my RB5.

Its made 341.9BHP and 310lbs on an ECUTEK3 mapping by Bob Rawle.

Standard internals but full-decat, ported headers, FMIC, induction kit and 550 injectors.

Not much you can do with a VF35 once its hit its limit but a TD06 16G can be rebuilt into a 20G. Which means more power once you've got used to the 16G.

New_scooby_04

iTrader: (4)

Very good point - totally forgot about that. If the car is new age, stick and STi 8 one on there, if it's a classic go for a good FMIC like the Hybrid. I put one on mine, made a very big difference after the remap!

Ns04

New_scooby_04

iTrader: (4)

See my profile, mate

Ns04

Andy Hobson

Wow that's a mighty impressive output. It's very similar to my plans besides the FMIC. Did you notice a significant increase in lag with the VF35+FMIC ? The torque curve suggests you're seeing plenty of boost by 3,000rpm. I wonder how long your gearbox will last ?

Ami

iTrader: (5)

Just a quick question - could anyone tell me when exactly vf35 start blowing 1bar, when the full boost (and how much) and how long it lasts through the revs... I've heard it's getting weak before the end (7500rpms?)
The best in 2litres setup.

cheers

New_scooby_04

iTrader: (4)

Had the VF35 in there for 2 years now and box still fine (touchwood)

FMICs generating significant lag is an SN myth.

Get a good one like the hybrid, get it mapped properly and you'll be smiling.

My boost came in much more aggressively when I had mine mapped with the FMIC. IIRCC the car took an extra 5 degrees of ignition when the FMIC fitted over the std TMIC.

Ns04

joz8968

iTrader: (13)

From NASIOC...

IHI VF35
(425cfm, 250-325whp, Bolt-On)
- This is the standard equipment turbocharger used on the JDM Subaru Impreza WRX.
- The VF35 is similar to the VF34. It utilizes the same compressor housing and the same compressor inducer size. The differences are in the divided thrust-bearing design and the P15 exhaust housing. This allows the VF35 to spool slightly quicker than the VF34 at the cost of less top-end performance.
- Expect to achieve full boost with the proper mods and a quality tune between 2800-3300rpms.
- 2002-2005 WRX owners will need fuel upgrades for this turbocharger and proper engine management is highly recommended for all vehicles.

IainMilford

iTrader: (15)

I cant give you the exact figures but mine tops out at about 1.5 bar and holds boost well

Ami

iTrader: (5)

joz8968 - I know this theory.
But what means full boost - 1bar? 1.3? 1.5? and still don't know what can I expect before the redline

cheers anyway

dunx

iTrader: (3)

Mine max'd at 1.6 bar and kicked like a mule, bug-eye STI + FMIC on Std. VF35 to give 340 bhp.

DunxC

99greenwagon

iTrader: (39)

im about to fit vf35,,ive already got my99 with ninja sports cat,magnex mid section,h&s backbox with ecutek remap,running 238.6bhp,280lb ft,im leaving the standard 440 injectors in,and gonna fit walbro pump and the vf35 and some denso plugs,what figures will i be looking at? bearing in mind everything else is standard and i wont be going front mount. anyone???

joz8968

iTrader: (13)

Well, I assume as much as the compressor and housing is able to push through before starting to stall. What this boost figure is; who knows . For example, if it's capable of, say, 2bar of relative boost, then it would be capable of achieving that boost between the stated 2800-3300rpm band. Whether it's subsequently capable for it to hold that max boost to the redline, once again, don't know.

I know this obviously doesn't answer your question though

Perhaps there is some outfit out there that has flow-tested this turbo under controlled conditions and recorded the results ...

There must be others out there who have pushed this turbo to the limits and observed the boost? Anyone?

Ami

iTrader: (5)

joz8968 - yeah, indeed I hope for some experiences from people using this turbo, to find out its limits...

cheers anyway - and we'll maybe see few more answers.

thanks all