05-12-2011, 10:12 PM
As far as I know the standard gov starts to cut fuel at 3k and massively reduces the fuelling past 4.5k, making it hard to rev any further than that. Shimming the gov means that (depending on the level of shimming, usually around 5mm) fueling wont start being reduced until much later in the rev range and if you have a large enough turbo (Bigger than T2 kinda territory) you can run the engine round to ~7k.
If your planning on having a small turbo (GT15/K03) for more torque/faster spool then you wont see massive gains from a gov mod as the smaller turbos are out of puff by about 4k anyway, but if you have anything larger then its a mut have tbh, totally changes the way the car drives imo.
If your planning on having a small turbo (GT15/K03) for more torque/faster spool then you wont see massive gains from a gov mod as the smaller turbos are out of puff by about 4k anyway, but if you have anything larger then its a mut have tbh, totally changes the way the car drives imo.