Power estimates

[Slidesector]

So i've got a GTB legacy 1997 but not the facelift. it started off standard with the twin turbo engine. Soon after it kindly got dropped 4 1/2 inches on some 18" wheels. Then i had the idea of seeing the power output i could get from the twin turbo engine, so i got a set of extractors and a polished vf22 turbo and a front mount.

I fitted these making it single turbo and came into that annoying engine check light when labouring the engine. So took out crappy 5 speed and threw in a sti v6 5speed changed the clutch to a kevlar race clutch.

Then threw in a link g4 external mounted ECU, yay no more light! Puta 38mm waistegate out of the turbo housing and ran the car at 14.4psi.

On its run in tune it got 194.8kw with 690nm of torque.

This was quite good but ristricted by the exhast. So fabricatored a 3" straight off the turbo. Got a nice figure of 199.8kw

Now im wanting a bit more so picked up a sti v7 engine, just done a cambelt waterpump and tentioners. I've been told i can put this in and run 20psi happily does anyone k ow what is safe but strong? And also a power estimate? Picked up a 5 puck clutch and taking it. Next week for fitting and a dyno ( also got a radiator and wAlbrou fuel pump)

So does anyone have ideas of power estimates?

[WRXONP]

lol not much point guessing what It could make . . better to just get It done so you know . . .

for the price you paid for the ver7 motor you could have got more power from your old setup

[Slidesector]

Yes but wanting to know the boost safely reccommened?

How could you get more out of a twin turbo open block engine? Theres nothing more to to to that engne without cams and forging.

The v7 engne comes stock with a semi closed deck and forged crank, pistons and conrods, not to mention a shitload more power and vct to help it hammer along. I'm hoping to obtain 280kw at 20psi

[WRXONP]

a Vf22 won't get 280kw.i run 20Pound on a open deck at 235kw ! supporting boost is all about having the fueling to match. but just remember . boost pressure isn't every thing :-p

[Slidesector]

Psi isnt evrything, 20psi from any turbo will create the same power at the end of the day. A vf22 will sustain 20psi with no pressure drop. Injectors are factory purple so can handle 280kw and walbrough 500hp fuel pump will support, link g4 will safely control without the AFM to worry about.

Extractors will help with power and direct intake will create smooth flow. So i am struggling to see what other mods will gain ,e more power

[wrx_lou]

 Slidesector said:

Psi isnt evrything, 20psi from any turbo will create the same power at the end of the day. A vf22 will sustain 20psi with no pressure drop. Injectors are factory purple so can handle 280kw and walbrough 500hp fuel pump will support, link g4 will safely control without the AFM to worry about.

Extractors will help with power and direct intake will create smooth flow. So i am struggling to see what other mods will gain ,e more power

Untrue. A larger turbo will have a higher flow at the same psi as a smaller turbo.

[Slidesector]

But a vf22 turbo is the biggest ihi turbo subaru made and will sustain without drop

[caspros]

You won't get 280kw from a VF22. And fueling isn't a reason why. The smarter guys who know about flow blah blah blah will explain why.

Ninja edit : As far as I know I have the highest kw on here from a VF22, and have all supporting mods. Including a G4.

[madmike]

*madmike invites vorigan to come educate a newbie

[Koom]

You will be struggling to make 280kw at just 20psi on a EJ20 for a start. Unless you're planning on sustaining it to +9000rpm? Or doing some magic headwork?

I'd make an uninformed guess of somewhere around 230-240kw atw.

[Scoobydoo]

Oh god.. I wouldn't waste my time LOL

[Kiwi_Fozze]

 madmike said:

*madmike invites vorigan to come educate a newbie

+1

[slystiguy]

Koom knows best

its all about supporting mods.

At a guess I would say it will put much more than 600 million hp at the wheels of course

[gotasuby]

I was running 24psi and still wasn't making 280wkw, well at least i dont think i was

[LAZLO]

good luck going against these guys lol

[WRXONP]

lol ! just bolting a Vf22 on a motor and running 20 Pound won't give you xxx kw . there's so many things to think about to make the power . . then you need to support that power !

what was the highest kw on Vf22 ?

Psi and Cfm are 2 totally different things. . .

and as for how much Psi can my motor handle bro ? it all comes down to tune . air fuel ratio . detonation etc etc sooo many things to think about not just Vf22 on 20 Pound !

and pressure drop as in the boost tappering down at higher rpm isn't just the turbo . . . its other factors too . . members on here have Vf22s tapering down

[Kiwi_Fozze]

im sure you could get a vf41 to hold stable with a welded internal gate and a well set up external...

[sultan]

 Scoobydoo']

Oh god.. I wouldn't waste my time LOL

Oh god.. I wouldn't waste my time LOL

Oh god.. I wouldn't waste my time LOL

Oh god.. I wouldn't waste my time LOL

Oh god.. I wouldn't waste my time LOL

Oh god.. I wouldn't waste my time LOL

Oh god.. I wouldn't waste my time LOL

Oh god.. I wouldn't waste my time LOL

Oh god.. I wouldn't waste my time LOL

Oh god.. I wouldn't waste my time LOL

[quote name='Scoobydoo said:

Oh god.. I wouldn't waste my time LOL

/quote]

[gotasuby]

if you buy my turbo you should get pretty close to your goal with supporting mods

[slystiguy]

so the answer to your question is ..., 280 kw no unfortunately it wont make that sorta power. How ever with supporting mods (ecu+tune split fuel rails, bigger intake an exhaust) you will get the most out of your setup an best bang for buck. plus when in 50,000 kms when it goes pop you can build a stroker or something an have all the gear to go with it already to go.... personally I think 20psi is to much but if you can afford the repairs then by all means go for it. others will tell you different stories I calls em hows i sees em

Also have you considered the other aspects of running a 400hp engine? for examples brakes an suspension ? not saying you will need it but there no point having a car that car go like the clappers but can't stop/turn when you need it to

[Slidesector]

Well if 14 psi on an engine that was 180kmz and just really shit created 199kw and 700nm, then i thought a semi closed, forged vct STI engine would give a fair bit more considering its also going to have 20psi, a friend got his v7 sti dyno tuned to 211kw 380nm and that was COMPLETELY stockrunning 16psi. so throw a link in 4 more psi a freeflow exhast, bigger turbo, freeflow intake and extractors and a killer tune, i thought high numbers would be expected

[WRXONP]

vf30 is better than Vf22 in my opinion

[funkytown]

Listen m0r.. 230-40 on a vf22 end of story.

for comparison i am making 295kw at 25psi on a garrett 3071r which is substantially bigger than an vf22.

fwiw weare talking wheel kw..not engine kw

[rex-leggy]

 Koom said:

You will be struggling to make 280kw at just 20psi on a EJ20 for a start. Unless you're planning on sustaining it to +9000rpm? Or doing some magic headwork?

I'd make an uninformed guess of somewhere around 230-240kw atw.

i would agree but more around 220-230kw.

if you got a bigger turbo or gotasuby's setup which is bolt on you would get more, and on a v7 engine it would be safe.

from all the info ive seen the vf22 has trouble keeping the boost at 20psi (starts to drop getting to the end of the rev range)

all set ups are different tho.

bigger turbo is what you need worth getting one before getting it tuned.

vf30 ....... yea right

[Dv8er - FSTWRX]

When you say you have a v7 engine now, do you mean just the block out of a v7 or heads etc as well?