vf28

[Guest sleeperfoz]

just brought a vf28 to into the forester ;D

the tdo4 has developed a big scream

what sort of gain am i looking at with the 28?

car has v3 sti ecu,yellows,afm and a straight 2,half inch exhaust one muffler at the rear.

still has cat in down pipe.

thanks

[nt_a_foz]

Heh heh heh dollers in my poket :D

your going to love it over the tdo4

[Guest sleeperfoz]

well i will start nicely at 16 psi and go from there ;D

just a nice easy boost level

ryan are you saying my seats will need strengthning to hold my fat old arse in ;D

[nztintin]

will turbo not add performance untill your running the small turbo out of its efficiancy ie td04 vs vf28 @ 11psi same power just different spool time?

[Guest sleeperfoz]

 QUIKGT said:

Nope. You should have driven my car before and after the VF10 - TD05H swap. It felt faster with the TD05 on 8psi than the VF10 did on 13psi!!

Basically for the same boost it flowed more air. Yeah I know, I'm still trying to get my head around that one too...

i understand what you are saying

the tdo4 has been losing a bit of its puff over the month and a half and the whistle is now a solid scream

so i am looking forward to the 28 ;D

[Guest sleeperfoz]

i am going to use the waste gate actuator from nt a foz,

the 28 and actuator come together so should be 15/16 psi.

will not use the tap at the moment,unless i have to

[Pappu1]

the 28 and td04 have very similar spool times with a nice TBE exhaust - not too many rpm in difference..

essentially a big bang almost the time the 04 came in play - only harder and lasts longer..

how i knoiw

done the exact some swap and my reaction was:

similar spool rate

more power at lower rpm and not running outta puff at 5g..

only ran the 28 at 15psi so well within its safety range and fair bit more headroom to go..

i say anything between 16-18 will give a fairly HARD whack of power and not run outta puff till in the 7g rpm range..

although best to upshift by 6.5-7 if on standard internals lol..when pushing it that is..

you will find the 28 really responsive and have a decent power curve for standard motors with simple bolt on mods etc..

i prefer the 28 over the 30 for street driving..

the combinations i have used so far are

td04, tdo5,tdo6 hybrid

vf23,28,24,30,22

best for street aka daily driver with a PUNCH when needed was the 28..

some other turbos will give more punch at higher rpm but then depenmds what are your preferences as to where you want your power..

personally i like a fair bit of low end with some reserve in the top end when i feel like a blat down some back road but since mostly i need to get to work on time everyday through traffic, i prefer the 28's low end and top end compromise

[Guest sleeperfoz]

thanks pappu

so how much kw did you make at 15 psi and on what setup?

i will be interested to see what the forester makes once the 28 is on

[Pappu1]

dont think i wud make much pwr bro..

more reliability around a track wud be my thig then to force all the kw i can.. for now anyway...

i dont have figures but i think at 15-16 psi the 28 wud be in the region of 160-170kw@w or ther abouts..

maybe when i get my ecu retuned then will push to 17-18 psi and most likely fet 200kw - thats what my old sti did when it had the 28...

think ran like 196kw@w on 18psi ...