The ProMAX chip holds the base maps for ignition advance and fuel injection timing. ProMAX modify these maps up to the RPM limit (7100 or 7700). The data is merely smoothed beneath 2500 RPM.
All functions of the ECU (including knock sensing and closed loop lamda operation) are untouched and continue to operate as before.
The chip does require the use of 98 RON fuel. It is recommened that this fuel is always used. It will also return better fuel economy compared to 95 RON. If you have to use the occasional fill of 95 RON - this is OK.
When tested independently by Nine Magazine in California - the chip gave an average increase of 15bhp. However, the most noticable improvement will be increased torque spread and improved drivability.
When combined with a Cat Bypass / Sports Cat and K&N Panel Filter - the results are even more impressive.
For those thinking about the ProMAX upgrade - it
is just £99.95 from K300
Performance on 0161 355 1275 and can be fitted in about 30 minutes
(or less).
A 7700 version can make a little more power on
a fresh engine (with excellent compression).
Customer comment - I only put 98 Ron in
if im going to be doing any "spirited" driving be it on track
or otherwise.
Customer comment - I have run both fuel grades (unleaded and super-unleaded) with the Promax chip, 98 Ron is the best and Optimax is the preffered, the car runs better and more smoothly with the chip. When I have run 95 ron, if pushed I would say it was slightly less spirited.
The 7100R has a 7100 rpm limit. The 7700RT has a 7700 rpm limit but also has fuel and ignition delivery to 7700 rpm allowing higher maximum power on some engines.
The maps are identical to 7100 rpm on both chips. The 7700RT is generally chosen by track day users and those with fresh engines (with good compression and minimal leak down).
If you don't plan on hanging onto gears to 7700
rpm (as some corners demand on some circuits) and are road use only,
I would suggest the 7100R chip.
The 7700 was developed primarilly for the
USA market - but we sell just as many 7700 chips to users in the UK.
Main benefit is not hitting the rev limiter mid corner on a circuit.
We have now seen a few cars where a ProMAX chip has replaced a bespoke chip (created on a rolling road) and delivered better results.
The reason for this is that the open loop and closed loop maps are all developed on the ProMAX chip. What this means is that you feel the performance changes even under partial load driving (not just wide open throttle).
On a rolling road, the tuner is usually trying to obtain maximum power with the Wide Open Throttle (closed loop) map. This is where the ECU ignores all sensory input and uses the data on the chip only (85% more throttle). Very few people (other than track racers) drive their car at full throttle all the time - which is why sometimes a rolling road chip can feel no different.
The ProMAX chips are designed using sophisticated computer modelling techniques that simulate road use. We rework all the ignition and fuel maps (both open and closed loop) which results in not only more torque where you need it - but smoother running too. The data beneath 2500 RPM is left alone to enable cars to pass emissions and the RPM limit is raised to either 7100 or 7700 RPM.
So, in summary - it may be possible to extract a few additional BHP on a Dyno. However, this may be at the expense of all the other benefits the ProMAX chip offers. The ProMAX Chip delivers anything from 8 - 20 BHP on a 968. This is not what you feel though - what you feel is more torque at lower RPM and a greater torque spread (less throttle travel for more go when accelerating).