Factory boost/max boost

[Enervated]

Would anyone be able to tell me what the factory boost is on a 02 b4 and the maximun boost I can run on a factory engine set up?

[Guest S T E Y E]

more than likely the factory boost lol...dont think they handle too much more boost

[Enervated]

Any idea what the factory boost is set at?

[soobie spinner]

Yeah one of my friends who did his mechanical apprenticeship pretty much all on Soobies said that for a '00 B4 RSK its round 15Psi factory. So for an 02, id imagine itd be the same.

[subaru-mania]

Not to sure about the twin turbos bro, as my legacys a single bf5 But pretty sure they run a standard 14psi on secondary, personalty I wouldn't Touch The boost on yours as yur likley to run into trouble Leaning out/det etc

What mods Are you running? as If its completely standard I would be looking at changing exhaust right through 1st off even with that you would notice it, and someone correct me if im wrong but that would raise your boost somewhat neway..

[Guest vf20/21bg5]

 Enervated said:

Would anyone be able to tell me what the factory boost is on a 02 b4 and the maximun boost I can run on a factory engine set up?

i had my tt set up with my primary vf20 tapped right out as far as it would go boosting at 20psi with a zs controller....you do have one dont you? every tt should

[Enervated]

Mine is just completely standard, probably will look at full exhaust before looking at turbo's.

[Guest]

Boost is around 9.9bar/14.5psi stock. The engines have the same compression as the wrx engines (not sti) and as such can probably handle similar boost levels. Ive been told 16 psi is probably a safe figure.

 

i had my tt set up with my primary vf20 tapped right out as far as it would go boosting at 20psi with a zs controller....you do have one dont you? every tt should

I never realised you could use the zs sequestial controller as a boost contoller? I though it was just used to control the switch over point?

[Guest]

lol i would run more than 14psi.there rwin turbo for 1 and the engine probly wont be ablt to handle to abuse of 16psi+

better to be safe than sorry lol

[ODB]

TBH if you are wanting to feck around with stuff like this go buy an WRX or fork out for single turbo conversion.

The twin turbos are meant to be a grand tourer and arent really designed for that sorta tinkering.

You will just piss yourself off with the complexity and the frequency of sh1t breaking.

[Guest]

 ODB said:

TBH if you are wanting to feck around with stuff like this go buy an WRX or fork out for single turbo conversion.

The twin turbos are meant to be a grand tourer and arent really designed for that sorta tinkering.

You will just piss yourself off with the complexity and the frequency of sh1t breaking.

hes right,but on the other hand the tt subarus were always guna be set on low psi from the start,turning the boost up a few psi wnt damage anything.you have to rember if your turning the boost up you have to have supporting mods.fuel pump upgrade ect.

you may benifit from other mods like intake,mayb a tt front mount kit,ecu upgrade,or single turbo conversion.

[Enervated]

Been considering a single turbo though. probably look at a T3 T4 single. I can get one with piping and intercooler for just under 1000$ + installation. Any idea how much extra kw a t3 t4 turbo would add or any recommendations for specific turbo?

[funkytown]

before your factory engine lunches itself? not much, before your gearbox then shits itself? not much

and how much boost will you want to run?

[Guest vf20/21bg5]

i think what funkytown is trying to say is with a big turbo you have to support it with big mods to the short block and drivetrain.......but with a moderate turbo upgrade like a TD05 or a vf22/23 you can go places for now on your standard long block.....then if you are feelin horny and have lots of muny then forged is the way to go for power over the 300kw/400hp range

[Enervated]

ha, I'm not looking for that much power.. Preferable around the 250kw mark. I was quoted a VF23 turbo from mag & turbo for 5500$ and I've just had to upgrade to a wrx gearbox because the current b$ gearbox shat itself already lol.

[funkytown]

asdk;lfajdskadsnfasdfjasd a vf23 for $5500.. HOLY :

mag and turbo at their best right there. Where do i even start....

FYI the WRX box isnt an upgrade.. its probably the same gearbox or even something of lesser quality.

[Guest]

il pull my vf23 turbo off tnyt for 1k.heaps better deal haha