What Turbo on a STi JDM (MY01) - VF30?
28 June 2004, 02:14 PM
#1
What Turbo on a STi JDM (MY01) - VF30?
What turbo is fitted to a Japanese Spec WRX STi MY01.
I think it's a VF30, if so how does this compare to a VF28 in terms of spool.
Drove a mates STi yesterday and the lag was quite alot compared to a TD04.
I have a VF28 to fit and don't want to experience this much lag
I think it's a VF30, if so how does this compare to a VF28 in terms of spool.
Drove a mates STi yesterday and the lag was quite alot compared to a TD04.
I have a VF28 to fit and don't want to experience this much lag
28 June 2004, 02:25 PM
#2
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Boost control and decat go a long way to improve on the spool up of the standard STis.
VF30 is similar to VF28 in spool up. VF35 is a bit earlier.
For instant response in 2nd gear, you'll need to be over 4000 RPM to have little lag with any decent 300+ BHP turbo commonly available on Subarus today, twin scrolls and big engines perhaps excepted.
VF30 is similar to VF28 in spool up. VF35 is a bit earlier.
For instant response in 2nd gear, you'll need to be over 4000 RPM to have little lag with any decent 300+ BHP turbo commonly available on Subarus today, twin scrolls and big engines perhaps excepted.
28 June 2004, 02:55 PM
#4
28 June 2004, 04:53 PM
#6
VF30: The VF30 has a bigger compressor than the VF23 at 47mm. It incorporates a 9 blade compressor wheel. The core is a divided thrust bearing and has a P18 exhaust housing. This is the standard turbo on the New Age Sti.
VF34: The VF34 is similar to the VF30 but has improved spool up due to roller bearing design. This is the standard turbo on the New Age Sti RA Spec C. This turbo yields good throttle response and mid and top range power. It also uses a ball-bearing center section, which reduces friction and positively locates the shaft-wheel assembly to improve spool up and avoid turbo failure.
VF35: The VF35 has identical internals as the VF30 and it uses divided thrust bearings. However, the exhaust housing is a P15 which means this turbo will have fantastic spool characteristics. This turbo is standard on the new WRX Type RA and is very difficult to source.
VF34: The VF34 is similar to the VF30 but has improved spool up due to roller bearing design. This is the standard turbo on the New Age Sti RA Spec C. This turbo yields good throttle response and mid and top range power. It also uses a ball-bearing center section, which reduces friction and positively locates the shaft-wheel assembly to improve spool up and avoid turbo failure.
VF35: The VF35 has identical internals as the VF30 and it uses divided thrust bearings. However, the exhaust housing is a P15 which means this turbo will have fantastic spool characteristics. This turbo is standard on the new WRX Type RA and is very difficult to source.
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