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Easiest way to increase HP is a new ECU...
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Posted by REM in Seattle (more from REM in Seattle) on Wed, 17 Mar 2010 22:50:19 Share Post by Email
In Reply to: OG 9-3 T5 performance mods path? vs C900, TSR, Wed, 17 Mar 2010 15:46:00
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A reprogrammed Engine Control Unit (ECU) can generate about 220-230 WHP. Based on what you have done so far, you will end up with a Stage 2/Stage 3 set-up (reprogrammed ECU, larger exhaust, improved airbox).

A better intercooler (Viggen or aftermarket) will help, especially in hot weather. Smoothing throttle body transition casting also helps. The T-5 engine can handle up to 250 WHP without injector or fuel pressure reg. changes.

REM in Seattle
1998 Saab 900SET; Silver metallic; 5-door; Automatic; 112,000 miles
Dyno tested at 193 hp and 215 lb-ft at the wheels; or approx. 230 hp and 250 lb-ft at the crankshaft.

ENGINE
* SpeedParts ‘Stage 2’ Engine Control Unit (ECU).
* Saab stainless steel sport exhaust with added center resonator.
* Forge piston type boost pressure by-pass/diverter valve (FM CL-007P).
* 3” inlet tube to factory airbox with ITG performance foam air filter.
* Smoothed/ported throttle body transition casting and removed turbocharger outlet tube ‘silencer’.
* Thermo-Tec ‘Thermo Shield’ insulated intercooler inlet and outlet tubes.
SUSPENSION
* Swedish Auto Specialties 22mm (7/8”) rear anti-sway bar.
* Koni Sport adjustable front struts and rear shock absorbers.
* Abbot Racing steering rack brace & polyurethane tracking control arm bushings.
* MP Performance sub-frame brace.
LIGHTING
* European E-code headlights with Philips ‘VisionPlus’ halogen 60/55 watt H4 bulbs.
AUDIO
* Infinity Kappa speakers – Model 32.1cf 3.5” 2-way speakers in the dash, Model 693.1i 6”x9” 3-way speakers in the rear parcel shelf, and Model 65.1mb 6.5” mid-bass speakers in the front doors.
* Dynamat ‘Super’ & Dynamat ‘Premium’ sound deadening material in doors and rear cargo area.

SMOOTHING/PORTING THE THROTTLE BODY TRANSITION CASTING ON THE NG900

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