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According to the guys at Hirsch Performance the Viggen T7 intake pipe connected to the TD04 turbo is the most restrictive part in the current set-up on my car. Most tuners use a bigger intake at comparable powerlevels. This can be either a big intake pipe like Hirsch, Maptun, Abbott, etc. offer, or a set-up like Abbott offers for their TD04 kit. The restrictive last bend before the air enters the turbo is replaced by a silicone hose.
After checking out the intake on the Belgian Maptun/Speedparts importer's 9-3, we came up with this idea. A 70mm silicone hose will fit the T5 airbox outlet and the T7 spec turbo inlet. The 90 degree bend silicone hoses are a smoother design than on the picture. I've never been good at drawing
I've been thinking about possible problems I might encounter and came up with this:
The silicone hose connecting to the turbo will be a tight fit. A coolant line is situated very closely.
Another problem might be the crankcase ventilation. It has to be welded/fitted to the intake somehow.
ERP ported and polished the intake on his TD04. I'll probably do this after the new intake proved to be working. A big T7 intake pipe won't fit anymore after porting the turbo intake, so it's irreversible.
The custom ECU I'm using was written for the Viggen intake pipe. Will Trionic be smart enough to compensate for the different airflow?
Any thoughts on how to improve the 70mm set-up before I start working on it?

After checking out the intake on the Belgian Maptun/Speedparts importer's 9-3, we came up with this idea. A 70mm silicone hose will fit the T5 airbox outlet and the T7 spec turbo inlet. The 90 degree bend silicone hoses are a smoother design than on the picture. I've never been good at drawing


I've been thinking about possible problems I might encounter and came up with this:
The silicone hose connecting to the turbo will be a tight fit. A coolant line is situated very closely.
Another problem might be the crankcase ventilation. It has to be welded/fitted to the intake somehow.
ERP ported and polished the intake on his TD04. I'll probably do this after the new intake proved to be working. A big T7 intake pipe won't fit anymore after porting the turbo intake, so it's irreversible.
The custom ECU I'm using was written for the Viggen intake pipe. Will Trionic be smart enough to compensate for the different airflow?
Any thoughts on how to improve the 70mm set-up before I start working on it?