Hi guys currently in process of having a waste gate flange made on to a stainless uppipe its 38mm but wondering what spring rate I need here are the option's its a 2004 wrxsti and aiming for 360 380 bhp when finished with mods and remap cheers


Available in choice of pressure:0.3 bar [MVS.3BK]*0.4 bar [MVS.4BK]*0.5 bar [MVS.5BK]*0.6 bar [MVS.6BK]*0.7 bar [MVS.7BK]*0.8 bar [MVS.8BK]*0.9 bar [MVS.9BK]*1.0 bar [MVS1.0BK]*1.1 bar [MVS1.1BK]*1.2 bar [MVS1.2BK]*1.3 bar [MVS1.3BK]*1.4 bar [MVS1.4BK]*1.5 bar [MVS1.5BK]*1.6 bar [MVS1.6BK]*1.7 bar [MVS1.7BK]

 

ive heard that 1 bar is okay for up to 600bhp. correct me if im wrong

 

Whats the bar on the wastegate on a vf35 any one know and some ppl say it will mess the car up cant understand why

 

Why would it mess up your car? Ive run EWG for years on my starlet.

Right, Wastegate pressure is your "base pressure" so this will be the lowest the car can ever run. What boost do you run on your map? and do you have two map settings?

If so set your wastegate to the lowest setting and use your boost solenoid to bring it up to your highest setting

 

And you have got a decent wastegate havent you? not some cheap ebay crap?

Tial, Sard, HKS, or similar?

 

Hi there

Depends on the turbo/boost what you will be running,but this has been great answer on one forum


Jura

 

Well im running a vf35 full decat exhaust from downpipe front mount airfilter fuel pump aiming for about 360 bhp and it will be single map setting just dont know what boost it will be at. I will be using tial wg and someone on here said it messes with lamba sensor dont know how true it is

 

And after its all done im having an engine built for the summer fully forged and then will have bigger turbo so later on I can change the spring in the wastegate

 

Running external wastegate on VF35 is what I wouldn't run/consider,just due cost and performance ratio

0.7bar spring should be enough too for bigger turbo

Jura

 

What you mean u wouldnt run\consider just due cost and performanceis the turbo no good ?

 

On such small turbo as VF35 running external wastgate setup is in my view pointless

Just EWG(External Wastegate) cost £220 at least,modifying pipework etc will cost extra money and you can end with price somewhere at region of the £500-£600 without the mapping and what you will gain,not sure,yes will have awesome noise

I will rather save money and think twice about the best option

Jura

 

When are you looking at getting car mapped brocksey?

 

I would beg to differ with Jura, EWG isnt "performance enhancing" as such, but works very well on smaller turbos. This is due to the boost creep been eliminated as the wastegate on the smaller turbos is too small and often requires "porting" to stop the boost creeping at high loads.

I have used EWG's on small turbos for a number of years to great effect, and can honestly say it is a worth while mod, personallly i would go with a plumbed in screamer pipe though as the noise does get on your **** after a while!

 

Well its gonna cost me 80 to have pipe and vband flange welded on 220 for ewg then im having car mapped any way and as I said in earlier post next year will have a forged engine built so will be opting a bugger turbo set up just asking if it will run okay on my set up now and what spring rate I need

toyney im off to tractive solutions had work done by him before awesome tuner goes all over world tuning cars and setting time attack cars up

 

well id say a 0.7/1 bar spring should be fine

 

Cheers matey

 

I'm selling Tial MV-S 38mm with 0.7bar spring

Here is the link

https://www.scoobynet.com/subaru-par...ate-175-a.html

Jura