hi guys got a facelift uk classic an had car mapped to 324bhp earlier this year with the vf23 an just wondering is it worth switching to a vf35. with the uk box the vf23 dont make full boost till about 3600rpm an wondering if it worth swapping to spool up quicker if there is a difference. any help is appreciated. thanks

 

i would like to know aswell as im getting mine mapped with a vf35 in

 

I had a VF35 which boosted similar to the oe TD04 and gave me 313/300

 

Out of curiosity my previous TD04 started hitting boost at 2200/2300 rpm when does the boost start on a vf 35

 

what other mobs did you have, AS IF this is the case i dont want to go the route of a vf34 as 300 hp is plenty really for me

 

i think the vf35 will start to boost around 2800rpm but want to know for sure before i buy 1.

 

this may help http://www.imprezatypera.com/imprezaturbospecs.htm

 

Mods were:
Hybrid FMIC,
Remap,
k&n 57i (only there because of fmic)
Full decat 2.5"
Walbro 255 fuel pump
3 port boost solenoid.

It's 3 years since i sold the car but iirc boost started picking up around 2500rpm with full boost (1.3bar) being achieved around 3200rpm. Like i say - it's a while back. Again however - the car was totally fine to drive and was was not hugely different to drive after fitting the 35 other than having more bang when the loud pedal was pushed

 

or andy forrest td05 16g fronty entry,fits all 1997 onwards.

This turbo is very popular on installations aiming for up to 340bhp.

This turbo will typically spool up to 1 bar boost by 3000rpm and full boost by 3300rpm.

 

..........but runs a std gearbox close to it's limit! - having said that, chatter city possible as a TD05 is strong enough to run without a dump valve and even if you do break a gearbox it's a good excuse to mod some more

 

my VF35 used to be on full 1.6 bar of boost by 2800 rpm but that was on a 2005 2L sti with AVCS heads

 

would the heads make that boost so quickly. the vf23 takes forever

 

VF23 to VF35 is not a big difference. TD04 to VF35 is a good difference.
VF23 to TD05 18G is a good difference.

 

would love a 18g but not forged in my uk classic. would the turbo be more reliable if to get mapped to what my vf23 is putting out now an what is th comparison in spool up if u know please on the 2.0
thanks

 

Does your car have a fmic as my vf28 starts hitting boost at 2800 rpm,which is about 500 rpm later than my tdo4.Full boost at 3600 rpm seems quite high ,unless you were running a vf 22. My mate has an sti version 3 with a vf 23 fitted,81,000 miles and that starts hitting boost pretty much the same as mine.

 

yea mate i have a fmic too but bcause of the uk box it takes along time to get up the rev range. mine starts to work about 3k then all full boost at about 3600rpm.

 

You don't need forged internals for a TD05 18G.
Spool will depend on gearing and modifications but generally full boost by 3500 in 4th gear on a level road or before

 

thank harvey thats about hat my vf23 does at the moment. i do no the consequences abouthigh bhp an stress on gearboxes but think im gonna go for 1 of these an get it mapped. cheers harvey