The Saab Viggen has a 2.3L turbocharged motor as many of you know, and the maximum boost is 20 psi, an awfully big number for an unmodified car. The compression ratio is 9.3:1. This brings me to my question: why is the hp so low on this car? Max HP of 230 with 20 psi boost? That's only 100 hp/L, a rather low number in this case. I wonder if you can chip this thing and slap on an exhaust for 70 hp like the Porsche 944 turbo...

First post... yeah baby!

 

Off the top of my head I can't remember exactly, but you have to take into account the size of the turbo. A smaller turbo can be used in order to avoid longer spool up time. This will of course limit the hp gain but could account for the high lbs of boost. For what it's worth a Viggen is a very capable car. Handles pretty well (it's no S2000) but for the size and design it can haul ass.

 

sabb is currently in development with garrett to develop a delayless turbo, the proposed solution is that a seperate electric motor will spool the turbo up, they said it would be ready for 2003-2004 MY

 

Maybe it makes 20psi at very low revs, and backs it off at higher engine speeds. That thing has a heap of torque.

 

Base Engine Size: 2.3 liters
Horsepower: 230 hp @ 5500 rpm
Torque: 258 ft-lbs. @ 2500 rpm

The torque is a giveaway - the turbo is a small unit to boost torque. 258 ft-lbs is medium sized V6 range, and is 100 ft-lbs more then we have!