400HP is always a good target in a power sense , having a fuel system that has some extra capacity in it fuelling wise will also do no harm. Beyond the 315 HP area the VXR Astra standard injectors are really running too high. We have some a little better at the higher end but some certainly start to get unpredictable beyond this power. Bigger injectors are really the best option , increasing the fuel pressure too much with standard plastic fuel lines is not such a great idea.
The ASNU direct fit pump has proved to far out perform all the other pumps we have used . Running one totally flat we have had near 600 hp one a single unit , more when running a pair.
The Deka injectors are a very well made injector , the variance across a very large number of these is very small and they always map well too. We have used hundreds of these injectors without a single failure and they will make 400HP comfortably.
Paired up , these two components pretty much sort your build for 400HP barring filters , if your seeking more power then they will both stretch to a little bit more than the 400. If wanting a lot more than the 400 then its probably time to think about some 1000CCs
This setup can be fitted and mapped to a standard car or a stage 3 car without issue , in preparation for having the right hardware for more power. We can fit these on the day prior to ECU calibration sessions.
These parts do not necessarily mean you will make more power , if something else is holding you back then these will not mask the issue.