VF23 versus VF46 on 2.5T
Posted:
Sun Nov 10, 2013 11:30 amby Shaheenis
Hi guys, not sure whether this is the right place to post but if have been considering at some stage upgrading my turbo to a VF52 and at the same time I would probably upgrade the TMIC to a Hyperflow or similar. I am also in the process of trying to sell a spare VF23 from my other wagon when it occurred to me it may be a comparable upgrade to the VF52. Is this the case? I had it running on a 2.2ltr and thought it may be a little small for a 2.5.
If so, what is involved in fitting it as the VF46/52 has a 2 bolt flange?
Also, if I did this could I use a different more common aftermarket TMIC without flanged inlet?
Cheers in advance.
Re: VF23 versus VF46 on 2.5T
Posted:
Mon Nov 11, 2013 9:20 pmby Shaheenis
Has no one done this? It seems impossible to find anything on actual flow rates in CFM for the VF46 although I have learned that the compressor design in the VF46 is improved efficiency versus the older VFs. 5-arc scroll design or something. -->
http://legacygt.com/forums/attachment.p ... 1179245648IHI VF 23 ------------- 423 CFM at 14.7 PSI
========= 422 CFM max flow for a 2 Liter at .85 VE pressure ratio 2.0 (14.7 PSI) 7000 RPM =======
========= 526 CFM max flow for a 2.5 Liter at .85 VE pressure ratio 2.0 (14.7 PSI) 7000 RPM =======
Some useful info:
http://www.clubsub.org.nz/forum/index.p ... 859.0;wap2
Re: VF23 versus VF46 on 2.5T
Posted:
Mon Nov 11, 2013 11:02 pmby Newbie GT
Hi mate interesting thought
A vf52 will out run a vf46 they just run out of steam and the vf52 keeps pulling.
My mate had this upgrade and it really moves !! Tourque down low very punchy also
Re: VF23 versus VF46 on 2.5T
Posted:
Tue Nov 12, 2013 4:50 amby dr20t
VE for turbo EJ is over 1
Re: VF23 versus VF46 on 2.5T
Posted:
Tue Nov 12, 2013 7:38 amby Shaheenis
dr20t wrote:VE for turbo EJ is over 1
So does that reduce the max flow figures above? If so by what factor roughly?
Re: VF23 versus VF46 on 2.5T
Posted:
Tue Nov 12, 2013 10:14 amby dr20t
The airflow calculation is only to demonstrate what your airflow requirements will be
A vf23 would be a downgrade I believe.
Re: VF23 versus VF46 on 2.5T
Posted:
Tue Nov 12, 2013 5:15 pmby Shaheenis
The VF23 is definately bigger than a VF46, I am just not sure where it sits in comparison with a VF52 (which I would prefer but $$$). The VF23 has a P20 exhaust housing (versus I believe a P18 on VF52) and can pump out around 220kws on a 2ltr at 18psi with supporting mods. Not sure how this translates to a 2.5ltr or the complexity in fitting one (which could be quite simple) and hence why I started this thread. I would prefer if someone just sold me a VF52
.