In our latest dyno test we had this 2021 Vauxhall Astra 1.5 CDTI in for tuning and testing. We’ve already conducted extensive development on these, so already know what that 1.5 CDTI engine is capable of. So after a quick installation of our diesel module, it was up on the rollers to see what gains had been made.
Dyno testing before and after shows healthy gains across the rev range, with a significant increase in power and torque, really transforming how it feels to drive.
Peak power was increased, as we were able to lift it from 121hp at stock, up to 147hp with the box. If you take a look at the dyno graph below you can see how we change that curve (dotted red and blue lines). We give real consistency here, bringing that extra power in as soon as possible, whilst holding it for as long as possible throughout the entire rev range. We really open up that mid-section, right up to that +26hp at its peak, really transforming how it feels out on the road.
Torque also saw some really impressive improvements. At stock the engine produced 325Nm and now 387Nm with the box. If you take another look at the graph (solid lines), you can really see where we have applied those gains. Again looking across that whole portion of the mid-range, you can really see exactly where its lifted, adding the +62Nm extra at its peak, delivering that increase exactly where it’s needed.
Check out the full dyno test here:
For more information on tuning for your Vauxhall, please visit: https://bluesparkautomotive.com/vauxhall-tuning
The chip tuning box featured in this blog can be found here:
