View Single Post
      01-12-2013, 05:31 AM   #23
Sal@Evolve
BimmerPost Supporting Vendor
24
Rep
1,063
Posts


 
Drives: Slow
Join Date: Feb 2008
Location: Luton, Bedfordshire

iTrader: (0)

Cams.... We like those!

It is a time consuming process to generate a calibration for cams.
We have done lots of S62's with schrick cams and The results can be found on m5board. Be prepared to be surprised.
We tune a large number of road and race S54's with cams in the UK.
S65's follow the exact same principle. We did one car in Dubai some time back but who ever fitted the cams got the cam timing wrong.

With cams it is all about fuel and vanos timing.
The vanos tuning must be done on a dyno and that's after a well prepared initial calculated profile is created by the tuner.
Fuelling for partial load even on a target based dme is not as easy as it sounds.
there is the ignition timing and too often tuners use way too much with cams.

Finally, adjustment to torque maps, idle speed, fuel enrichment maps etc all need adjusting slightly and then you are done.
Datalogging is an absolute must during this type of process.

We have a very special s65 engine being delivered to us soon. Cams + modified cylinder heads + custom headers.
This is where things start getting real interesting.

Cams should be fitted by someone who knows what they are doing and has the correct tools.