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We were asked by a customer to diagnose a misfire on his Vectra VXR, which had occurred at around the same time as a set of spark plugs had been replaced.

Initially we checked which plugs were fitted in the front bank (as these are easy to check) and also to check the plug gap, which is critical on mapped cars. At this point all seemed well as the plugs were iridium ones, and they were correctly gapped.

Running the car on the rolling road (with full datalogging facilities) the car did indeed have a misfire running the ecu remap that was installed. As the plugs seemed fine, wondering if software had anything to do with the misfire we mapped back to standard (as the customer had brought his hand held unit with him) and ran the car again. The misfire had gone.

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We have recently revised our Astra and Zafria VXR intercooler pipework, after requests from customers, to improve upon an already excellent design. From its existing design, the complete kit has been tested and proven to in excess of 420bhp (the intercooler core is good for 600bhp) with the intercooler utilising 60mm pipework from the turbo (the moment we can step it up from the OE 50mm turbo outlet we do) to the intercooler 60mm inlet. The intercooler outlet was 50mm, and stepped up to 60mm by the start of the OE map sensor pipe which we made use of in our original kit.
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A customer asked for his Astra VXR to have a run up on our rolling road the other day, as he had recently bought it and was curious about the power and torque output of the car which was running a full 2.5″ Milltek exhaust system and an off the shelf ecu flash.

The ecu reflash had been carried out by an authorised dealer however it had not been check on a rolling road (as the installer did not have one).
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We had a VX220 Turbo booked in the other week as the customer had reported that the car seemed to be holding back on track. He thought it might be a fuelling issue and asked us to carry out a health check on the rolling road, datalog the ecu to see what the current map was doing and report back.

The car was running a ‘Stage 2′ ecu remap and has a full 2.5″ exhaust system. After our initial datalogging rolling road session we received a bit of a shock when we plotted the results ……..
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Courtenay Sport Astra VXR Race Car

Welcome to Courtenay Sport’s new blog. This blog will serve as an additional resource alongside our main website to keep everyone updated on what we are up to on a daily basis. We hope you enjoy it.