(Changing Title to:) VF8 info needed!

Imprezive · Post by **Imprezive** » Sun Jan 07, 2007 8:57 pm

Luckily you live in NZ, there must a slightly more vf8's over there considering they never came on a car sold in the US. Your buddie's car isnt running bad because of the turbo itself, unless the turbo is broken or the turbine blade is siezed up its not the turbo. Its something HE did.

i_c_the_light, thats great that you can get vf8's easily and for cheap. Thats not the case over here in america.

i_c_the_light · Post by **i_c_the_light** » Mon Jan 08, 2007 4:53 am

True, however, the major downside is these turbos have probably been given absolute death during their lifetime far more than the average VF-10 because lets face it, the GT wagon is a cruiser family ride, not something boy racers would love to get their hands on and beat the crap out of.

i_c_the_light · Post by **i_c_the_light** » Fri Jun 01, 2007 6:38 am

Right, after how many months!!! I got myself a VF-8! Getting one was actually harder than expected, mainly because the wrecker totally forgot he had a couple but managed to find one amongst a pile of TD04's and the odd VF-10. I asked him about any TD05's and he had ONE in, but it got snapped up real quick with an EJ20G out of a totally destroyed STi. It's going in tonight, provided my mate gets back to me on being able to use his garage for it.

napphappy · Post by **napphappy** » Fri Jul 20, 2007 9:11 pm

I have had a VF-8 for a couple years now.
First on my RS-RA motor (2.0) It had very little boost(or power) below 3K. But after that it pulled hard till 7k.

Now I have it on a 2.2 with JDM DOHC. My current heads have slightly smaller ports than the RS-RA(still very large). The turbo is at full boost by 3k now. I really like the way it feels.
At 15psi my EGTs tend to climb to 1600F on long pulls.
I have 440cc on a JDM EJ20g ECU with a VOS chip.

know1 · Post by **know1** » Sat Jul 21, 2007 3:17 am

Those aren't Ver.5 STi heads are they?

napphappy · Post by **napphappy** » Sun Jul 22, 2007 3:54 am

They are 1998 EJ20R Heads. Almost identical to EK20K heads except have water and oil ports for the 2nd turbo.

know1 · Post by **know1** » Sun Jul 22, 2007 7:29 am

nice!

22t block + ej20k heads = mmm

i_c_the_light · Post by **i_c_the_light** » Fri Oct 26, 2007 6:56 am

After having the VF-8 in my Legacy GT for some time, I am not going back! At stock 9psi it's a bit 'megh' but when upwards of 14-15psi the car becomes a horizontal rocket.

I am actually moving forward and got my eyes on a mates VF-24 which I'm hoping to get first dibs on when he upgrades to some wild hybrid setup on his V4 STi. I hope to upgrade soon anyways as the seals on the VF-8 aren't in the best shape.

Oh and the VF-8 in my GT has a 20-R turbine housing. VF-10 has a 15-R.

conrAWD · Post by **conrAWD** » Mon Nov 12, 2007 7:28 pm

What car did the VF8 come off of? I'm debating between the VF8 and TD04. Any ideas?

livestrong14 · Post by **livestrong14** » Wed Nov 14, 2007 2:25 am

The manual tranny Liberty/Legacy RS'

I've now had my VF8 up to 18-20 psi....... It sure is fun!! 425 cc greytops, no em.

555BCTurbo · Post by **555BCTurbo** » Wed Nov 14, 2007 4:15 am

livestrong14 wrote:
I've now had my VF8 up to 18-20 psi....... It sure is fun!! 425 cc greytops, no em.

You looking to pop a hole in a piston man?!

If you run that much boost without fuel correction, that is what is going to happen!

livestrong14 · Post by **livestrong14** » Thu Nov 15, 2007 1:23 am

It spiked! haha

BXSS · Post by **BXSS** » Fri Nov 16, 2007 6:00 pm

How long does it boost 18-20psi during the spike, & what does it level off at (? PSI) ?

livestrong14 · Post by **livestrong14** » Fri Nov 16, 2007 11:36 pm

1-2 seconds, then it tapers back off to 17

BXSS · Post by **BXSS** » Sat Nov 17, 2007 12:00 am

Sounds like you run that boost level all the time, is that thought correct?

My car also spikes for about the same amount of time, but the spike is exactly 2psi over the constant boost level so a 16psi spike = 14psi taper down.

I'm not sure if I want to fix the spiking as it does spool up quick this way & feels pretty "zippy".

livestrong14 · Post by **livestrong14** » Sat Nov 17, 2007 12:04 am

Yep, that would be correct. I have noticed the same thing. When it does that, I just turn down the MBC a turn, and it's fine.

555BCTurbo · Post by **555BCTurbo** » Sat Nov 17, 2007 3:06 am

Don't run anything more than 15 psi on a VF8...otherwise y'alls be askin' for trouble.

livestrong14 · Post by **livestrong14** » Sat Nov 17, 2007 5:52 pm

^^haha, this coming from Mr. 20 psi!!

n2x4 · Post by **n2x4** » Mon Nov 19, 2007 9:52 pm

555BCTurbo wrote:Don't run anything more than 15 psi on a VF8...otherwise y'alls be askin' for trouble.

Why do you say that?

555BCTurbo · Post by **555BCTurbo** » Tue Nov 20, 2007 6:13 am

livestrong14 wrote:^^haha, this coming from Mr. 20 psi!!

Yeah, because Mr. 20psi has a PP6, and is able to keep his AFRs rich enough to prevent detonation.

555BCTurbo · Post by **555BCTurbo** » Tue Nov 20, 2007 6:13 am

n2x4 wrote:
555BCTurbo wrote:Don't run anything more than 15 psi on a VF8...otherwise y'alls be askin' for trouble.
Why do you say that?

I have a VF8 in my car, and a wideband O2...and on a stock ECU and stock injectors, you run out of fuel at about 15 psi on a VF8.

n2x4 · Post by **n2x4** » Tue Nov 20, 2007 2:10 pm

555BCTurbo wrote:
n2x4 wrote:
555BCTurbo wrote:Don't run anything more than 15 psi on a VF8...otherwise y'alls be askin' for trouble.
Why do you say that?

I have a VF8 in my car, and a wideband O2...and on a stock ECU and stock injectors, you run out of fuel at about 15 psi on a VF8.

That's what I figured, thanks. I can tell the VF8 flows pretty well compared to the VF11 (stock PSI on both turbos).
Just wanted to make sure there wasn't any sort of "Danger to Manifold" floorpan flyin' voodoo to watch out for.

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(Changing Title to:) VF8 info needed!