What is the max boost for the VF48?

Tuned200 · 02-16-2009, 09:56 AM

As it says, looking for solid #'s to figure out if my vf48 is being pushed. Im at 18 psi now and wanting more.

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Unabomber · 02-16-2009, 11:47 AM

What does your tuner say? Please don't say you are controlling it without engine management.

Badler · 02-16-2009, 03:40 PM

More boost doesn't always = more power FYI.

Tuned200 · 02-16-2009, 11:17 PM

I understand this. I am protuned with supporting mods and ap. I was just asking if there is anymore room to add more psi? I was told it was cut off since my 4eat was about at the limit. basically if there is more room i wouldl ike to get a racegas tune.

modaddict · 02-16-2009, 11:25 PM

I think the vf48 will make hella boost if you weld the wastegate shut or the shaft twists in half.

Tuned200 · 02-17-2009, 02:02 AM

Yeah. Thanks for the words of wisdom.

Unabomber · 02-17-2009, 07:49 AM

You can't add boost without tuning. Talk to your tuner as our words mean nothing without your tuner's advice.

testes1010 · 02-17-2009, 08:44 AM

Quote:

Originally Posted by Unabomber

You can't add boost without tuning.

Depends on how the map was originally tuned.

The VF48 on 93 should have another 3-4psi left in it if intercooling & fueling capacity are adequate.

Tuned200 · 02-17-2009, 08:52 AM

Quote:

Originally Posted by testes1010

Depends on how the map was originally tuned.

The VF48 on 93 should have another 3-4psi left in it if intercooling & fueling capacity are adequate.

This is the info im looking for. Lets assume I have pleanty of fuel and intercooler forthe job. I am happy with my 18psi tune for street and dd use. I would like a high boost map, as well as a low boost map. I will talk with my Jorge about my options as well. Im just gathering info.

Mr. Testes, you have a pm.

I have questions about your set up as im looking to upgrade my lgt too.

STi Mikey · 02-17-2009, 09:31 AM

Quote:

Originally Posted by Tuned200

This is the info im looking for. Lets assume I have pleanty of fuel and intercooler forthe job. I am happy with my 18psi tune for street and dd use. I would like a high boost map, as well as a low boost map. I will talk with my Jorge about my options as well. Im just gathering info.

Mr. Testes, you have a pm.

I have questions about your set up as im looking to upgrade my lgt too.

<<<<< Our turbos are pretty much identical. I have 40k miles on the car and between 4-5k are on the high boost map. 28psi yields only a few more whp than 23 psi, but in the midrange you get a crazy kick. Tuning and boost control is key, this will help determine how agressive you can go with timing.
On the high boost map I run the 28psi with 34-35 degrees of timing up top, and the car is reasonably quick for such a small turbo.

WagonGGA · 02-17-2009, 10:03 AM

STI Mikey- What engine management do you use?

modaddict · 02-17-2009, 10:13 AM

Quote:

Originally Posted by STi Mikey

On the high boost map I run the 28psi with 34-35 degrees of timing up top, and the car is reasonably quick for such a small turbo.

Holy crap I run half of that!

STi Mikey · 02-17-2009, 10:31 AM

Quote:

Originally Posted by WagonGGA

STI Mikey- What engine management do you use?

I use Ecutek w/ easy ecu. When I first purchased the car, I only wanted to spend top dolar on quality EM. My 04 sti was a 23psi pump gas monster and had the ecutek, so i figured I would stay consistant.

If I could go back and do it again, I could make the same power + have more options (ffs & lc) with open ecu. It was 1100 with all of my software and two tunes. It could have been free if I used open

Nonetheless, the car is performing as well as healthy through 40k.

Tuned200 · 02-17-2009, 04:25 PM

Mikey, you have a pm. This info is what I was wondering and looking for. the max air a vf48 can push before maxing out.

thanks a lot

B

Uncle Scotty · 02-17-2009, 04:59 PM

I run my td04 up to 21-22psi in the midrange and it is quite entertaining

02-16-2009, 09:56 AM	#1
Tuned200 Scooby Specialist Member#: 127740 Join Date: Oct 2006 Chapter/Region: MWSOC Location: Florence, KY Vehicle: 2015 WRX-Mine 2007 F-STI-Her's	What is the max boost for the VF48? As it says, looking for solid #'s to figure out if my vf48 is being pushed. Im at 18 psi now and wanting more. * Registered users of the site do not see these ads.

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02-16-2009, 11:47 AM	#2
Unabomber Big Ron Super Moderator Member#: 18062 Join Date: Apr 2002 Chapter/Region: MAIC Location: I can save you a ton of cash Vehicle: on car parts so PM me b4 j00 buy	What does your tuner say? Please don't say you are controlling it without engine management.

02-16-2009, 03:40 PM	#3
Badler Scooby Guru Member#: 133597 Join Date: Nov 2006 Chapter/Region: SCIC Location: Orange	More boost doesn't always = more power FYI.

02-16-2009, 11:17 PM	#4
Tuned200 Scooby Specialist Member#: 127740 Join Date: Oct 2006 Chapter/Region: MWSOC Location: Florence, KY Vehicle: 2015 WRX-Mine 2007 F-STI-Her's	I understand this. I am protuned with supporting mods and ap. I was just asking if there is anymore room to add more psi? I was told it was cut off since my 4eat was about at the limit. basically if there is more room i wouldl ike to get a racegas tune.

02-16-2009, 11:25 PM	#5
modaddict Scooby Guru Member#: 95840 Join Date: Sep 2005 Chapter/Region: NWIC Location: Pasco, WA Vehicle: sold to a good bud awaiting next car	I think the vf48 will make hella boost if you weld the wastegate shut or the shaft twists in half.

02-17-2009, 02:02 AM	#6
Tuned200 Scooby Specialist Member#: 127740 Join Date: Oct 2006 Chapter/Region: MWSOC Location: Florence, KY Vehicle: 2015 WRX-Mine 2007 F-STI-Her's	Yeah. Thanks for the words of wisdom.

02-17-2009, 07:49 AM	#7
Unabomber Big Ron Super Moderator Member#: 18062 Join Date: Apr 2002 Chapter/Region: MAIC Location: I can save you a ton of cash Vehicle: on car parts so PM me b4 j00 buy	You can't add boost without tuning. Talk to your tuner as our words mean nothing without your tuner's advice.

02-17-2009, 10:03 AM	#11
WagonGGA Scooby Specialist Member#: 134481 Join Date: Dec 2006 Chapter/Region: Tri-State Location: Yankee Stadium Vehicle: 08/4 Subaru Legacy Spec B/Forester XT	STI Mikey- What engine management do you use?

02-17-2009, 04:25 PM	#14
Tuned200 Scooby Specialist Member#: 127740 Join Date: Oct 2006 Chapter/Region: MWSOC Location: Florence, KY Vehicle: 2015 WRX-Mine 2007 F-STI-Her's	Mikey, you have a pm. This info is what I was wondering and looking for. the max air a vf48 can push before maxing out. thanks a lot B

02-17-2009, 04:59 PM	#15
Uncle Scotty * Banned * Member#: 16200 Join Date: Mar 2002 Vehicle: OK buy Nates beans westcoastroasting.com	I run my td04 up to 21-22psi in the midrange and it is quite entertaining