TURBOTUNE 2B DEVELOPMENT NOW COMPLETE

We've completed our RAV4 tuning and testing and have released the 
final version of the Turbotune 2B, which is now available from our 
dealers.

I have to say that I am extremely pleased with the way the Rav drives 
(& I'm not easy to please when it comes to engine tuning!)

It is very, very responsive, has minimal turbo lag, pulls well from 
1500rpm but will trundle along at just over 1000rpm in top gear and 
yet returns 40mpg (49 on the computer) on a day to day basis (short 
journeys) and 45 on longer ones (& I do use the extra performance ). High 40s is doubtless very possible driven in a more restrained manner. This 
compares favourably with a Synergy 2 equipped Freelander Td4 2L and 
puts the Landrover Discovery 2.5L TD5 to shame (28mpg is typical I'm 
told and hard to improve on, although its not a fair comparison:  
Shoguns and Navarras are about the same )

I particularly like its new found willingness and free revving feel - 
its definitely a sporty Rav even if it is a diesel. There's no way you'd 
believe it originally had just 115bhp!

I suspect the 2.2L 177bhp model would be embarrassed by it, although 
the shorter gearing does contribute to the acceleration at the expense 
of top speed (who cares about this? I don't?)

Incidentally the handling is fantastic for this type of vehicle (on 
dry roads) thanks to the fixed 4 wheel drive on this '55 reg model 
(pre 2006 facelift). Its easy to have at least two  tyres howling in 
protest but it is totally predictable and holds the chosen line well. 
If you do 'bottle out' and stupidly dab the brakes mid bend the back 
will slide but the ESP takes over, bleeping indignantly at you, and 
saves your bacon. (how do I know this...!)

Needless to say there have been no problems of any sort, and with this 
final version, no warning lights or cutting out. I do however use 
Millers Oils and swear by their Diesel Sport fuel additive, as well as 
using ZX1 in the engine, power steering, gearbox, and transfer box 
(didn't get round to putting it in the rear diff) as well as the fuel 
once every couple of months.

Fitting is very straightforward since it is 100% plug-in with 
absolutely no wiring mods or battery connections needed.

As you can see from the photos, there are 2 on/off switches, one for 
the tuning section and one for the boost pressure alteration, with a 
3rd rotary switch allowing selection of the actual degree of 
performance boost. (Some drivers may want it biased towards economy 
rather than maximum performance).

The boost pressure is only increased by 2-3 psi on full throttle  - enough to give a worthwhile boost in torque but also keeps the exhaust clean. On part throttle the increase is upto 4psi but as the pressure is much lower than on full throtttle, the actual pressure remains well below the normal maximum. (Most remaps increase the boost pressure so we are not doing anything these don't do, not that you can get one for most Japanese vehicles.)