Having your cake and eating it as well...

[nt_a_foz]

booommmm

[PhatRS]

Factor in the v7 being heavier and there will be stuff all difference in the real world Id say. The newer vfs (30,34,36,37 etc) do seem to make better area under the torque curve while making the sameish peak power even when chucked on a non-avcs engine, better compressor designs no doubt.

I always found the 23 had the worst of all worlds but thats my opinion and no one cares about that

[WRXONP]

Yeah im not trying to prove any thing just saying ive made good improvements since that dyno and im just trying to work out if a VF30 is going to give me gains and by the looks of things it will

[funkytown]

 WRXONP said:

Yeah im not trying to prove any thing just saying ive made good improvements since that dyno and im just trying to work out if a VF30 is going to give me gains and by the looks of things it will

correct - by gains we mean better power in the mid and low and yielding about the same if a touch less up top than your current turbo.. right but broad brush will be a 'faster' car.

[Scoobydoo]

I have a dyno plot kicking about somewhere of the VF30 I had in my wagon.. V4 STi-converted Legacy. Will see if I can dig it up and you can compare that one was well

[boon]

Get a VF34 if you can. I went VF30 -> 34 on my V7 and it was a night and day difference in terms of driveability. VF34 is well spooled at 3000rpm (motorway 109kph cruise RPM), you just squash the throttle and away you go. VF30 is still tieing its shoelaces at 3k.

[WRXONP]

Yeah I have been thinking VF34.... but is there any top end gain?

[wrx_lou]

The 34 is a ball bearing 30 which allows it to spool faster. I doubt there would be much if any difference between the two at top end.

[WRXONP]

oh sorry i meant is there a difference in the top end between a vf34 and vf23?

[wrx_lou]

should be. 34/30 have the larger p20 housing. How big the difference i wouldnt know.

[WRXONP]

Ya wrong bro . . 22 and 23 have p20. 30 and 34 have p18

[funkytown]

 WRXONP said:

Ya wrong bro . . 22 and 23 have p20. 30 and 34 have p18

correct its the turbine and compressor design that gives t more than the 23

[WRXONP]

So r ya saying a 34 will have more mid and top end ?

[wrx_lou]

oops sorry, yeah ya right lol.

[funkytown]

 WRXONP said:

So r ya saying a 34 will have more mid and top end ?

compared to a 23 it has more everywhere. Refer to qwertys first graphs. It has a 23, 34 and gt3071r on the same axis

[Guest]

 funkytown said:

here is the two 'power' curves overlaid. i need corrected figures to do the torque.

can you see the massive hole between the green and blue until over 100?

This is why it, all things being equal, the green one will be faster. Its making more at every point except right at the top - so its long gone by the time you hit peak kw. And they will just shift gears and be right back in the power again.

Altho i argree that a vf3x is a better turbo and also that the green car will be faster.

Its abit hard to make comparisions for the two turbos in these dynos as they have such different boost profiles. I would suspect that if you set the vf23 to make 20psi in the mid range then the difference would be much smaller.

[Guest]

As a general rule a vf3x turbo is capable of 5-10% more flow than a vf23/24

Flow = power.

In the real world on the same type of dyno best i have seen is 220kw for a vf23 and 246kw for a vf34.

Which seems to follow the flow figures.

[Pappu1]

 Qwerty said:

As a general rule a vf3x turbo is capable of 5-10% more flow than a vf23/24

Flow = power.

In the real world on the same type of dyno best i have seen is 220kw for a vf23 and 246kw for a vf34.

Which seems to follow the flow figures.

Outta curiosity what's the max u seen outta a vf22 bro

[Guest]

about 245kw but that was on a hub dyno - some say they read high.

There was on guy on here Mixja - got 300kw on a hub then could only muster 260kw on a rolling road a week later...

So I don't like comparing hub and rolling road results - be nice one day to do a real test to know one way or the other.

[Pappu1]

 Qwerty said:

about 245kw but that was on a hub dyno - some say they read high.

There was on guy on here Mixja - got 300kw on a hub then could only muster 260kw on a rolling road a week later...

So I don't like comparing hub and rolling road results - be nice one day to do a real test to know one way or the other.

hopefully i can get the 20psi tune done before the next dyno day

[Blake7]

Paps we need to organise a catch up with V mate...

.... I want my old map back

[Pappu1]

 Blake7 said:

Paps we need to organise a catch up with V mate...

.... I want my old map back

wat old map haha jokes

yea man an outing ay..

u going megameet?

[Blake7]

ha ha very funny..

Nah dude can't make that unfortunately

You got plans this weekend? I'm pretty flexible if there's a time for you

[Pappu1]

sunday perhaps ya?

hopefully meeting up with v as well

will update u k

(once i see when he is free etc as well)

PS. how are the seals now man?

any leaks ?

[Blake7]

Yep Sunday works for me so keep me posted

Seals are sweet mate, no leaks to speak of.

(I had a run in with an evo6 TM. Wasn't even close! haha)