Importance of ECU remaps: discussion and results

[DaFlake]

Great post Matt! Welcome to this side of the pond...

[Paul@1320]

On the JCW plot he's dyno it in 5th 130mph / 209kmh @ 7200

On the latest session he's dyno in 4th 104mph / 167kmh @ 7123rpm

[Dr Obnxs]

Quote: Originally Posted by sam_a156 (original)

Ok, now let me first understand myself what Roland, 1320autos and DrObnxs said...and then translate all that into Polish...

More seriously, very interesting. I will be better equipped for my next visit.THX.

When you're there, see if they'll tell you who's software they use for tuning. Over here, most are using DimSport from Italy, but I ran into another European company that does this kind of stuff when I went to SEMA (a big aftermarket automotive supply show held each year in Las Vegas).

Thanks,

Matt

[roland2003]

As you can see guys there is a minefield of possibilities for getting false results (either of your tuning or power running ) on the RR. We found that the wideband AF ratios are not quite the same on the RR as real roads either. With turbos theres even more problems either with insufficient load to produce boost or wheelspin coming on boost (we found that out!)
If your going on a RR the most important things are:-
-Monitor the intake temps as if these are too high even with computerised correction through OBD2 communication to adjust the figures , timing will retard, & AF ratio will richen. With too much correction the 'corrected' figure may still not exactly equate to what you get on the road .
-Ensure the rundown losses are measured and added onto the wheels figure to get a meaningful flywheel BHP. The actual WHP figure and the losses of that RR cannot be compared to another brand of RR ..its the final flywheel figure thats important. If you like 200+30=230 but 190+40=230 aswell !
-Ensure the rpm to roller speed is correct.
-Get a scanguage 2 so you know what your intake temps in say 4th gear will be on the road beforehand.

[sam_a156]

Quote: Originally Posted by 1320autos (original)

On the JCW plot he's dyno it in 5th 130mph / 209kmh @ 7200
On the latest session he's dyno in 4th 104mph / 167kmh @ 7123rpm

Yup, so apart from the different size & type of tyres, also this makes the numbers less comparable.

Quote: Originally Posted by Dr Obnxs (original)

When you're there, see if they'll tell you who's software they use for tuning. Over here, most are using DimSport from Italy, but I ran into another European company that does this kind of stuff when I went to SEMA (a big aftermarket automotive supply show held each year in Las Vegas).

I was spying on them when they started They used CMD - also from Italy (CMD Technologies srl).

Quote: Originally Posted by roland2003 (original)

As you can see guys there is a minefield of possibilities for getting false results (either of your tuning or power running ) on the RR
:
-Get a scanguage 2 so you know what your intake temps in say 4th gear will be on the road beforehand.

Right...and this gadget will go to my (rapidly growing) shopping wish list...

I did some test driving yesterday in dry conditions and the car really felt quite good indeed. TBH, I would struggle to say that there was any noticeable difference from my last summer's top condition after GTT visit especially that there is several months in between.

It is possible the the latest figures are conservative, beats me. But the before/after ECU tune difference I can tell: the car is now much more lively and responsive.

Edit: Scan Gauge II ordered