Im helping my friend upgrading his new MY03 STi. Im owner of STi 3 wagon but im not sure about the same upgrades on new Sti.

1) can I raise boost using bleed valve?
2) I found two lambdas on exhaust. Before and after cat. Which effect will be after replacing exhaust without cat?
3) Whiteline ALK and swaybar links. Can I get noticeably better handling?
4) Could mappers (on GEMS, LINK, ECUTEK etc.) use the variable timing on intake cam?

 

hello,

I'm not sure if this will help you but my bro's STI-8 is in the garage and we are picking it up tonight,

and he is getting fitted,

HKS Downpipe
HKS De-Cat with Lambda Sensor
HKS VTA BOV
DO-Luck IC Spray
HKS Boost Guage
HKS Racing Suction Kit (with HKS airflow Monitor)

Already on the car,

PPP ECU
PPP Fuel Pump
PPP Back Box,

And in the next couple of months,

Autronics ECU
Oil Catch Tank
Knocklink
& maybe SECS not to sure though
wastegate

but the I'll take some pics and tell you how it performs, and if your up foe it the car will be going to the kent meet at the wharf pub feel free to come over and we can show you whats been done

 

Thanks.

And any suspension upgrades in future?
Are you happy with standard suspension?

 

at the mo the suspension is very good it has a tendancy to go wide sometimes under pressure also the shortech kicks in if the tail snaps out to much, I think it is a good compromise for the road, probably look at changing the dampers and springs later on, and then move onto the brakes,

I think the first stage is getting nice reliable power through the rev range. it's a bit hit and miss at the mo as there aren't to many people who have tried modding with this paticular car at the mo so no mistakes to learn from.

 

Keep us all posted how the car gets on CTR. Very interested as i`m picking up my STi 8 PPP soon.

Cheers

 

I bet you can't wait, it's a real improvement with the PPP alone, it also sets you up for modding later with the Fuel pump and the like

 

sorry guys car isn't going to be ready for the Kent meet, having to source a Turbo Gasket for the scoob,