So what do you guys suggest to get more torque than power from the STI. Just like the Rally cars which has 300hp but tons of torque. :evil: I know with more torque, you will probaly need a stronger tranny, but what else?
To develop more torque the easiest way is with some better fuel management. We just have to wait for that, or go with a stand alone system (TECIII or other $$ system).
From my information the first thing that broke in a driveline abuse test was axles. The trans is very strong and will hold up well. Probably CV joints and axles. Possibly drive shaft universal joints too.
actually the WR cars generate the torque levels they do in part from EXTREME boost pressures at low RPM. Due to the fact that the maximum amount of airflow to the engine is limited through use of mandatory intake restrictors, additional performance gains are achieved by running elevated boost levels at lower RPM levels, so that the engine is seeing similar airflow at 3,000 RPM compared to when it's running at 7,000 RPM.
Their boost curves tend to peak VERY fast, and VERY high and then trail off dramatically as RPM increases. The boost/airflow levels into the engine have also been controlled ("mapped") in these cars for years now.
I saw a dyno curve of a Group A 3S-GTE motor (Toyota motor, from the WRC Celica and, later, Corolla) a few years back while building up my Celica All trac- the engine ran something insane like 42lbs of boost at 3,000RPM, but trailed off to just 18 or so psi at redline.
I also saw somewhere that the Escort Cosworth's developed close to 700lb/ft of torque in their heyday, although the commonly banted about figures were "just" 500 or so...