I want to lower boost

[sickmatesick]

Hello, car is a BC5 GT

My car has a group N chip which runs 98 octane, greys and 15psi. I really like the way it runs and idles with this ecu except I only have a vf10 turbo and want to lower the boost to about 8psi so I don't have to worry as much about the wee turbo taking a hiding

If I lower the boost with a boost tap am I going to get overfuelling problems?

I do have 2 tdo5 in the shed if thats anybodys answer but I don't really want to drive at 15psi anyway, just want the smooth running this ecu has

[Pappu1]

no mate if u lower it with a tap it wont do overfuel as the ecu will only fuel for that boost level only as set on the tap

[Guest]

are you running a pill inside one of the vacume lines on the turbo?if so remove that and run a straight line from the acutater and the turbo.you will then run your acuaters boost which will vairy to 7psi-10psi.

a standard sti runs about 1bar so 15psi isnt too bad.that is if your engine is a sti one or not.im not sure in 15psi would be healthy on a standrd wrx engine

[DRFVDR]

 sickmatesick said:

Hello, car is a BC5 GT

My car has a group N chip which runs 98 octane, greys and 15psi. I really like the way it runs and idles with this ecu except I only have a vf10 turbo and want to lower the boost to about 8psi so I don't have to worry as much about the wee turbo taking a hiding

If I lower the boost with a boost tap am I going to get overfuelling problems?

I do have 2 tdo5 in the shed if thats anybodys answer but I don't really want to drive at 15psi anyway, just want the smooth running this ecu has

not sure if a tap will lower boost by itself, u will need to disconnect the factory boost controller, so it will run wastegate pressure, then fit tap to up boost to 8 psi

[Pappu1]

boost tap will lower it only as low as the factory wastegate.. and 8psi is above that so a tap should be able to give u 8psi on a BC

[Guest S T E Y E]

yes ...

as said before

disconect factory boost solinoid and run a line from the turbo compressor to the actuator...this will give u 7-8 psi depending on spring pressure in actuator)

if u want say 10 psi fit a boost tap inside the line and adjust to suit

if u fit ur td05 and run 15psi it should be fine as thats what the ecus maped for

[sickmatesick]

Thanks for the quick replies. Yeah its a standard wrx engine and 15psi feels like too much it comes on very quick even with a fmic. Today I think I will run a line direct between the compressor and actuator as said above.

[Guest S T E Y E]

yea i bet 15 psi would come on quick with that little turbo haha

a wrx engine is fine on 15 though as the ecu would be maped to run 15psi...

but i dont know if the small turbo will last on 15psi... a td05 is fine on 15psi

[sickmatesick]

Just took it for a drive round the block and it reads 5psi, which will be fine until I either put my tdo5 and some stronger intercooler clamps on or sells first

[subaru-mania]

 sickmatesick said:

Just took it for a drive round the block and it reads 5psi, which will be fine until I either put my tdo5 and some stronger intercooler clamps on or sells first

Not looking to sell 1 of the tdo5? Cheers =)

[sickmatesick]

Not at this stage sorry dude, if my car sells with the vf10 on it then maybe

[subaru-mania]

 sickmatesick said:

Not at this stage sorry dude, if my car sells with the vf10 on it then maybe

Np man, Even if you put them on ill bee keen to buy the vf8 if your selling it , Cheers