With 335 HP, the small Audi S1, whose name recalls the legendary rally car of the 1980s, has the potential to be a fun and fast compact, a pretty good treat!It is still an S1, with the strengths and weaknesses of an Audi, but it holds the 335 HP very well, but perhaps some intervention is needed for the chronic understeer, beyond the four-wheel drive system.Engine and transmission - The approximately 100 hp extra was pulled out of the Audi 2-liter TFSI, thanks to the Revo stage 2 software. Of course, the intercooler was also replaced, but not the turbine.In the future, however, the owner intends to install the larger one derived from Golf R. An operation that will also force the cutting of the front crosspiece to place another intercooler, larger than the one just fitted.Suspension and brakes - The tuner made only small but effective tweaks.At the front and rear he added 22mm differentials, which greatly affected stability.Then he replaced the original shock absorbers (remember that the S1 has multilink suspension at the rear as standard) and mounted some KW V3 adjustable in height, compression and rebound.Tuning sheet Audi S1 Software Stg 2 Revo Technik performance B 915 € Turbo Muffler Delete Revo Technik 125 € Intake Revo Technik Kit 209 € BRS Motorsport specific single-mass clutch kit 1.290 € Lightened BRS Motorsport service pulley 160 € Complete custom exhaust system full 76 scat with silenced silencer BRS Motorsport 1,750 € BRS Motorsport gear lever bushings 70 € GFB blow off modification 209 € NGK spark plugs 85 € Coil suspension KW V3 with spring modification on request 2.099 € Airtec stg 1 intercooler 599 € TBF silicone sleeves 190 € Compound front braking system from caliper RS3 334 mm disc Tar-Ox Ferodo DS3000 pads 1.690 € OZ Superturismo GT 17 7.5 ET35 rim 1.100 € 22 mm front spacer kit16 mm post.€ 149Total cost of the tuning intervention 10,640 EurosThe complete article with all the secrets, the track test and the instrumental data of the Audi S1 is on Elaborare 227.BUY PROCESS n ° 227 May 2017 HERE SUBSCRIBE to the monthly magazine PROCESS HERE (different options 3/6/11 issues) BUY DIGITAL VERSION for € 2.99 PC, iOS, Android single access HERE ANNUAL DIGITAL SUBSCRIPTION for only € 22.99