Originally Posted by Jonlem
How much nitrous are you using and what type of rollers do they have ?
Personally I'd avoid using the gas on the rollers if its a braked type of setup and from LOTS of testing recently we have seen some extremely strange figures using widebands to tune nitrous.
Myself and Gaz'd with the Corsa have both lost engines due to trusting widebands, usually on gas they show rich when infact its running completely the opposite.
Feel free to drop me a PM, got plenty of experience in this and wouldn't want you to potentially ruin a good engine