vf43 or vf48
 

im taking my impreza up in power again,currently running 354bhp with a vf35 and want around 380 bhp,which would spool the quickest and which is the more reliable unit? i think i read somewhere that the vf43 is one of the weaker vf turbos but unsure how true it is

its a blob wrx with sti8 engine,rcm headers/up-pipe,650cc injectors,sti top mount,rcm induction kit,rcm fuel pump etc

Ran a vf48 great turbo very smooth delivery all over the range

I had a vf43 on my uk and it made 352 and was a little bit laggy but when it came on boost it used to go well

running what you are on the road i dont believe you be gaining much more than a figure , what you got is probably a near perfect all rounder for the road .

You have already 354bhp there and really VF43 or VF48 can be spool slower on yours,those turbo works better on 2.5L or on 2.0L with AVCS

Jura

what Jura said, I have previously run a vf48 on a 2.0L and was good, probably the smoothest power delivery I have had out of any turbo but it is better suited to the 2.5 engine and can be near 400lbs on the 2.5 probably realistically around the 350-380 on a 2.0L dependant on mods and so on, as all the vf's though can be prone to cracks around the wastegate, mine had a very small hairline crack but during mapping Duncan it said it held boost better than he had seen on any.
have to say though I do like a 35

maybe a td0518g then or s sc38 would be better for me

I have a vf43 with no cracks as i found a brand new p18 housing for it quite rare i was told done about 2k since looking to swop for a md or a sc series plus cash or £400 delivered

Cheers

you would be better off spending the money on getting your avcs working as it will make the car more driveable than an extra 20 ish bhp changing to a slightly bigger more laggy turbo.

thing is the vf35 i have is causing cavitation and im not happy with it so the turbo needs to be changed