Corsa VXR Racing fuel injector upgrade

On 19 January 2010 the Corsa was taken to Thorney Motorsport for a stage 3 engine remap. In order to run this more aggressive remap it was neccessary to fit larger capacity fuel injectors.

The larger capacity injectors were fitted and the engine remapped.

The reasoning behind the decision to fit these new injectors is given below.

19 January 2010 - the need for larger capacity fuel injectors

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schematic diagram of the fuel injector - Corsa VXR Racing

Extract from report produced by Thorney Motorsport as to why Corsa VXR engines were failing ...

Thorney Motorsport is unique in being the only Vauxhall tuning company to be an authorized Vauxhall outlet, ie this means that we hear of information through other dealers, GM themselves and the grapevine more than some others and during the course of last year we heard of more and more failures of Corsa VXR engines. The damage reported was consistent - number 4 piston failure leading to varying levels of engine failure. Over the last 6 months we personally have inspected 9 Corsa VXR engines with engine failure and on every single one the failure was on the number 4 piston. On every single failure the car had been remapped by a particular tuning company or via one of this company's hand held ECU remapping devices. stage 3 fuel injector fitted to my Corsa VXR Racing There was also another engine failure (again on number 4 piston) we inspected that had been remapped by another tuning company but this company used the same software supplier for their ECU remaps, and this was repaired under its own warranty. Had all these failures been handled by the tuning company themselves then we (or anyone else) would have had no knowledge of the issue, however the advice being given to the owners of these cars was to "put the car back to standard and take it to a dealer" and as such these cars were entering the dealership network with "unexplained" failures - all on number 4 piston - in other words the dealership network (and TMS) were handed an issue to repair, this is not a case of trying to score points on a competitor, if the problems had been repaired by the supplier then it has nothing to do with us, Vauxhall or the dealership network.

Hang on though we can hear you say, why are you so sure that it is the mapping of the cars that is causing the problem? The answers:

  1. All the cars inspected had number 4 piston crown failure
  2. The damage is consistent with excess heat from the piston running too lean
  3. Nine cars were running this particular company's software and the 10th software from the same supplier
  4. There have been no reported failures in the UK on standard cars
  5. Our evidence shows that the injectors are exceeding their maximum flow rate which would explain the cause of the damage

Download the complete article written by Thorney Motorsport.