Vf30 vs Vf23

[Pappu1]

On a front mount setup and tuned to suit say running 20psi

What Wud u prefer?

The vf23 wu have better low end and mid and should match the vf30 almost for top end?

[greatdanz]

Ive just swaped a vf23 for vf30 in my gtb single. An its running the stock Sti ra v4 ecu, an i can say that its huge improvement got more down low power now all the way to the redline

[tydon]

what about vf35? Vs vf23 and vf30

[greatdanz]

 tydon said:

what about vf35? Vs vf23 and vf30

i orignally had that turbo but swaped it out for the VF23, its basically a VF30 with a td04L rear housing, made for really quick spool. I chose against it as the ecu wouldnt have been tuned for the 35. in some ways I regret it but happier now with the VF30

[funkytown]

neither VF will like 20psi dayindayout.

optimal will be somewhere in the 18-19psi space. probly the 30 having the marginal benefits. $ per kw probly not overly worth it imo

[Pappu1]

 greatdanz said:

Ive just swaped a vf23 for vf30 in my gtb single. An its running the stock Sti ra v4 ecu, an i can say that its huge improvement got more down low power now all the way to the redline

really

i wud have imagined the 23 having better low end than the 30....

never compared them back to back unfortunately but ur insight points as the vf30 being better than a vf23 ??

maybe more into quicker spool and mid range rather than outright top end..

max 210kw@w on whichever it ends up to be...

[greatdanz]

 SP00N']

[quote name='greatdanz said:

Ive just swaped a vf23 for vf30 in my gtb single. An its running the stock Sti ra v4 ecu, an i can say that its huge improvement got more down low power now all the way to the redline

/quote]

really

i wud have imagined the 23 having better low end than the 30....

never compared them back to back unfortunately but ur insight points as the vf30 being better than a vf23 ??

maybe more into quicker spool and mid range rather than outright top end..

max 210kw@w on whichever it ends up to be...

yup they were both running the same boost setting @16.7psi and I just felt the VF23 didnt offer the punch that the VF30 now offers. mind you the VF30 proberly suits the heavier car more than the VF23

[Pappu1]

did the vf30 really offer better lo end than the vf23?

[greatdanz]

yup I think it does, based on the "grin" factor

[Guest]

My vf23 was quicker to spool than td04 both untuned. Try both back to back and use virtual dyno so we can see the diff. Im betting theres not a lot in it if its even noticeable. Journal vs BB but all the vf are so close all depends on tuner/dyno. Ive seen a sheet where vf28 made mid 230kw atw mind you 850cc injectors. Just get a vf24/28/29 you will see the result youre after. With tuning which Im guessing you will be you can run any turbo and have 20psi @ 3500ish with a fmic. AVCS and tmic would make that even quicker Id be guessing.

[Timmah]

 evowrx said:

My vf23 was quicker to spool than td04 both untuned.

Any other supporting mods?? My little TD04 comes to live arond 3200~3500 then it feels out of puff by 4500Rpm.

[Guest]

Nope stock V5 non sti, pod filter and 2.5" cat back. I was running 14.*psi with an ebc tap style so no d/c adjustment or anything purely an electronic bleed and external wastegate. More over the whole rev range and earlier imo. Ran pig rich on boost though well sucked a lot of gas.

[Timmah]

 evowrx said:

Nope stock V5 non sti, pod filter and 2.5" cat back. I was running 14.*psi with an ebc tap style so no d/c adjustment or anything purely an electronic bleed and external wastegate. More over the whole rev range and earlier imo. Ran pig rich on boost though well sucked a lot of gas.

Was sounding good until the sucking gas part Cool to know!

[Guest]

Depends how hard you drive I guess I only got it as I was getting a tuneable ecu. I wouldnt recommend a change in turbo if you cant tune it for obvious reasons. Actually thinking back I cant remember but I think I ran it with stock reg on VF23 then split rails and went to 1.7:1 reg later with same setup. That definitely had an effect on how rich it ran I thought it was a 1:1 when i put it on.

[Timmah]

 evowrx said:

Depends how hard you drive I guess I only got it as I was getting a tuneable ecu. I wouldnt recommend a change in turbo if you cant tune it for obvious reasons. Actually thinking back I cant remember but I think I ran it with stock reg on VF23 then split rails and went to 1.7:1 reg later with same setup. That definitely had an effect on how rich it ran I thought it was a 1:1 when i put it on.

I don\'t have any plans of changing turbos on this car. Just thought it was really interesting to hear a bigger/better turbo being quicker to spool than the mighty, tiny TD04.