steve0

Right, basically, as title says. Want to know peoples opinions on the different options, with regard to the best turbo for 340bhp.

VF34
VF35
TD05 16g (the 18G is too expensive!)

New_scooby_04

iTrader: (4)

18G overkill for 340bhp anyway!

VF35 if you want the quickest spool
VF34 if you're prepared to sacrifice a bit of spool for a bit more top end
Td05 if you want the toughest turbo

Pete

Forgive me for being daft, but what turbo is it on V6 RA`s?? is is V28? I an new so be gentle.....

steve0

Right, but; how does the TD05 compare - spool-up/top-end wise to the VF series turbo's?

New_scooby_04

iTrader: (4)

TD05 spools later than both. I'm lead to believe it's marginally superior to the VF34 (which is marginally superior to the VF35) at the top end. Other mods, your specific can can easily negate differences though.

I know of one person on here who went from a VF35 to a TD05 and felt is was a mistake as it did spool up appreciably later.

Ns04

steve0

Right, well im thinking along the lines of the VF34 then. So, am I right in thinking this should have a good top end; but still get on boost earlier than a TD05??

Also, what kind'a price do all of these retail at, and where's the best place to get them from?

Cheers

Maz

iTrader: (34)

VF29.

Pete

Thanks mate.....

steve0

Right, well im thinking along the lines of the VF34 then. So, am I right in thinking this should have a good top end; but still get on boost earlier than a TD05??

Also, what kind'a price do all of these retail at, and where's the best place to get them from?

Varboy

a TD05 16g or (larger) may lose a little in spool but what you will lose in spool you will more than make up for in mid range torque.

Varboy

plus 340 on a VF will be with lots of supporting mods where as a TD05 18g could make that figure with less 'add-ons'

steve0

Ah right, whats the maximum bhp a TD05 16g could make? As I need to do this for as cheaply as possible thats all.

The car already has all the necessary supporting add-ons anyway, so that is not a problem.

mickywrx

iTrader: (29)

I was told a while back that the 16g is good for 340bhp. Mine's making 330bhp currently, but I'm at the point of needing larger injectors and most likely a mappable ecu.

That may be of help, if not sorry.

Micky.

Varboy

^^^depends on the car

if you want to know what it will 'make' on yours, give us your spec list and I dare say someone will hazard a guess.

Good thread below for you as well:

http://forums.nasioc.com/forums/show....php?t=1141476

dazdavies

iTrader: (22)

V6 RA's had VF28's on.

My modded MY 1999 made 360bhp at scooby clinic at 6200 rpm with a VF28

The car had loads of supporting mods for that figure though.

It previously made 330 bhp with a TMIC, ECUTEK mapped by Andy Forrest, 440cc injectors and a 2.5 in exhaust, 92 mm pistons. STI Ver 5 heads

The 360 figure was with Front Mounted Intercooler, 740cc injectors. 3inch exhaust system, Apexi power FC, 93mm wiseco pistons with 8.35:1 comp ratio. The same STI Version 5 heads but they had been polished with all the valves reseated and re shimmed.

I also had a VF34 on my pervious scooby (RB5) and that made good figures and spooled really well.

IMHO the VF34 is the one to go for.

Daz

Pete

So fingers crossed after mines been mapped on Wednasday i should be around 320-330ish??
Thats turbo back exhaust/ fuel pump/tek3 map. knock link @ 1.3-4 bar by API Pat horbourn is mapping it, excuse the spelling of his name..

dazdavies

iTrader: (22)

what turbo?

Pat knows his onions too

Pete

VF28

dazdavies

iTrader: (22)

Then it should achieve that figure

Maz

iTrader: (34)

V6 Wrx Ra has the vf 29 not vf28. The vf28 can be found on the P1 the sti ra v6and sti typr r v6. They are pretty much the same but the 29 has subtle improvements over the 28, the compressor wheel is different allowing faster spool up. Above 1.3 bar is pushing it a little at high revs, go for 1.4 mid range tailing off to 1.3 in the upper rev range. The 29 is a great turbo suited to the ra gearing perfectly.

Pete

Hope so Daz..... should make it quite a lively road car, i know there`s bigger bhp cars out there, but these are SO light. I had a Tommi Mak before this with Autronic/ anti-lag etc dynod @ 378 bhp similar torque, yet the RA to 100-120mph seems faster mind you delivery is totally different on this aswell.... should be fun...


........Pete..........

Pete

Make your minds up you 2 i`m the newbie with little knowledge, is it the VF 28 OR VF 29???

Maz

iTrader: (34)

. Staffi if you look at your turbo there is an id plate on it. On it you will find the designation number, that will dispel any confusion.

Pete

Will do mate when i pick it up Thursday.....

scooby0809

iTrader: (11)

i am no expert but just removed and sold vf29 of my ra,so definately a vf29

cossie01

FFS pete, trust you to be on here causing trouble.

You defected to the "dark side" to then ???

dazdavies

iTrader: (22)

As usual with late spec Classics it would appear there are subtle differences in specs.

The VF29 came on WRX RA the VF28 on the STI RA.

looks like we're both right lol

Incedently my car has the six speed box so i have the low ratio 1st - 4th with long 5th and 6th best of both worlds lol

steve0

Right, well here is the spec of my engine, and the mods it has:-

Currently on 74k; but had a bottom-end rebuild at 58k with forged pistons and billet rods (imported from America; but not sure what make)
Full Ninja System and decat/downpipe
Green Panel Filter
EcuTek Tek 3
Uprated Oil Pump
Walbro Fuel Pump

And I have waiting to go on (before the turbo and re-map):-
Ported Headers
STi8 TMIC
4bar FPR

So can anyone hazard a guess as to what power I could achieve and with what turbo's??

steve0

Right, what injectors are you running then mate? Im on 440cc, and have been told by Andy Forrest that they will handle 360bhp with an adjusted 4bar FPR, so they're ok.

Pete

Hello mate, not causing trouble, just aquiring knowledge