hi,

am thinking of a turbo upgrade, for my MY99 uk turbo. i presume i have a TD04, was lokking at either TD05, VF24 or VF28, which of these will be any good as an upgrade??

thanks
steve

 

Hi there,
I have a brand new vf39 turbo in the for sale section, if this is any good to you, straight bolt-on.

 

whats the VF39s peak power ability? spool up etc?

 

This from the APS website.....

"Most of the VF Series turbochargers are airflow limited to approximately 350 flywheel horsepower. In an optimum configuration, the VF 39 fitted to the US Spec STI will support approximately 370 horsepower."

Spool is similar to the VF30/34 turbo's.

 

VF39 is sleeve bearing, P17 exhaust housing (from small to large VF 35 is P15, VF24/28/29/30/34 is P18, VF22/23 is P20), same compressor as VF30/34/35. So it flows a little less than a VF34 because of the smaller exhaust housing, and a little more than a VF35. I would rate the VF35 on Optimax at about 320 BHP and the VF34 at 330 BHP, with a TD05-16G at 340 BHP. Some would suggest up to 10% more than this but I would rather be conservative when you see how many claims are not reproducible across different cars on different rollers. You can get up to 10% more by tuning hard with octane boosters.

Any of the turbos mentioned in this thread would be nice upgrades on a TD04 on a 2.0 with not a huge amount to choose between them except I would say the VF22 of which some examples were fragile.

 

VF22 BB, PZ20 ex.h/48.5mm c.h/5b c.w/0.71 A/R - JDM MY96 V2 STi / 1998
VF23 BB, PZ20 ex.h/46.7mm c.h/7b c.w/0.71 A/R - JDM MY97 V3 STi / 1998
VF24 BB, PZ18 ex.h/46.7mm c.h/7b c.w/0.63 A/R - JDM MY98 V4 STi
VF28 BB, PZ18 ex.h/46.7mm c.h/7b c.w/0.63 A/R - JDM/OZ MY99/00 V5/V6 STi
VF29 BB, PZ18 ex.h/46.7mm c.h/7b c.w/0.63 A/R - JDM MY00 V6 STi
VF30 TB, PZ18 ex.h/47.9mm c.h/9b c.w/0.63 A/R - JDM MY01 V7 STi
VF34 BB, PZ18 ex.h/47.9mm c.h/9b c.w/0.63 A/R - JDM V7 STi RA Spec C
VF35 TB, PZ15 ex.h/47.9mm c.h/9b c.w/0.51 A/R - OZ/UK MY03-05 STi
VF36 BB twin-scroll - JDM MY03 V8 STi RA Spec C
VF37 TB twin-scroll - JDM MY03 V8 STi
VF39 TB, PZ18 ex.h - US MY04 2.5L STi

BB = Ball bearing
TB = Thrust bearing
ex.h = Exhaust housing
c.h = Compressor housing
(x)b = (x) bladed compressor wheel
c.w = Compressor wheel
A/R = Area to Radius turbine housing ratio
JDM = Japanese Domestic Model

 

so should i look out for a TD05, as an upgrade for MY99 uk. turbo???? or would i not notice much difference??, it will be with walbro 160L/hr fuel pump,scorpion full exhuast decat(i think as i cant see any cats) and standard ecu(for now)

thanks

 

If you want low lag then on the TD05 then careful planning and supporting mods are required. Where abouts are you in Bucks?

F

 

in a good place where they have 99ron @ tescos !!!!
(Aylesbury)

 

YHPM

F