Another 900Hirsch 1994 Saab 900 post...
Mitsubishi TD04HL-15T-5. This turbo has slightly more lag than the stock Garrett T25. The T25 runs out of breath at high revs. The TD04 keeps pulling until the redline. It makes the B204L engine very powerfull.
Difference between T5 and T7 intakepipe.
The turbo was intended for a Trionic 7 equipped Saab. The way the turbo intakepipe is fitted to the turbo is different from a turbo on a Trionic 5 car, so a Viggen/Aero intakepipe had to be fitted. Crankcase ventilation, oillines and coolantlines also had to be adapted to the new turbo setup. Fitting a hybrid T25/28 is easier since it uses the same turbohousing as the stock T25.
The enginebay with T7 airbox on the left and Forge atmospheric dumpvalve on the right.
The stock setup with the Bosch bypassvalve and T5 airintake.
Bosch bypassvalve and Forge dumpvalve.
A T7 airbox has a big intake, the intakepipe on a T5 airbox is much smaller, but can be improved by replacing it with a 3" tube.
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