Hi All,

I have a V6 STI with the standard VF28.

Would a change to a VF35 be a worthwhile change or a waste of time (eg little gain).

Cheers

Gavin

Waste of time, stick with the VF28 for sure!

Hmm, was wondering the same thing myself and been told differently. I was told that it would help spool and have slightly better top end.. however this is all here-say and not proven fact.

Darren

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When in doubt, Pull it out...

daz, do a before and after

I would change my turbo from vf30 to vf35 driven a mate car before and definetly less lag than vf30

Anyone out there running a VF23 on their car, there are a couple on ebay for a good price.

A VF34 would be my first choice but outa the price range.

Cheers in advance

28/29 was superceeded by the vf30/35/34

the vf35 is the most common, vf-34 if you want marginally more top end and a tiny bit more lag, vf30 if you want lag and not much more top end

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Long live the WRC

so vf30 suits cars with anti lag yeah ? i was told it's stronger than any other vf turbo coz of rally cars using it..... ehmm im very interested in vf35 now

After the TD04
+500rpm lag on VF24/28
+600rpm lag on VF29
+650~700rpm lag on VF34
+800rpm lag on VF23/30
+900rpm lag on VF22

all on the same 3" exhaust after removing the std TDO4

All the turbo's with P18 exhaust housing & BB has good off boost response (VF28/34), and top end power of the 34 is very impressive , only down 3 odd kw on the 22 and yet heap more down low .

The VF30 starts late and come on fast , it has poor ish off boost response and very strong mid and top end .

The 30/35 & 34 have very good compressor wheels that work very efficiently and run lower intake temps and this is where the good power comes from .

The power on the 23 & 22 come from the open exhaust housing being a P20 , better exhaust flow and scavenging up top and the cost of some low to mid range power .

VF35 has identical internals to the VF30 and it uses divided thrust bearings. However, the exhaust housing is a P15 which sacrifices top end performance compared to the VF28/30/34's P18 exhaust housing.

The gains from the P18 exhaust housing is of better scavenging of the exhaust stroke in the top end , down side is the loss of low rpm torque as it allows fresh charge to exit the exhaust valves on cam over lap , much the same as what bigger cams do.

Summing that lot all up changing from a VF28 to a VF35 will give slightly (if any) more lag, but you will gain mid range power due to the more efficient (and slightly bigger) 6+6 bladed compressor wheel giving a cooler intake charge.

J

aren't you selling your car ?

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