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Performance is our passion and we work to get more out of your engine. Optimise your petrol engine today for more power, torque and fuel economy.
The Tunit Optimum is easy to fit to any petrol vehicle by simply plugging in to the OBD port. The standard Optimum comes pre-set in one of three performance settings from Eco to Sport Plus.
By using Eco mode on your Tunit Optimum you can make drastic improvements to your fuel economy and save money by filling up less often.
Ray ,Nissan Navara 2.5 dCi 171BH
Jeremy Davies of Bernard Davies Commercials was very efficient at fitting the Tunit. I have just returned from a trip of around 800 miles. I have only checked the fuel consumption by means of the vehicle computer- not brimming the tank. This, however, shows an improvement in fuel consumption of marginally over 9%. The power/torque improvement is somewhat more difficult to quantify but on the only occasion I really booted it to try it out (not towing) it really seemed to be an improvement. When towing the torque is more obvious low down in the rev range. On main roads I seem to use around 1500-2250 revs an aweful lot. It is surprising how well I can hold top with no loss of roadspeed (measured by my Tomtom) on uphill inclines compared to previously. Also I can get into top gear much easier than previously and acceleration seems much improved. I hope this feedback is useful to you. Thanks again to you and Jeremy
I Love their service.