Dear BMW Tuners
We have started to tune-up BMW M5, 6 -cylinder engine about six years ago in Finland.
The engine was were started is normal factory make M5 3,6 litre ( S38B36 ) -engine, that delivered in a dynamometer 317 Hp and 369 Nm of torque. The same dyno has been used always and every time at all the tests below:
Orginal engine
Wetterauer Chip 331 Hp / 391 Hp
110,6 Nm / litre / 1000 cc
93,6 Hp / litre / 1000 cc
Stage 1. Race engine
-Schrick 280 Camsaft
-Unichips ECU
-Adjustable Camgears
-Whit orginal airbox and exhaust manifold
345 Hp / 6600 rpm
406 Nm / 5270 rpm
114,8 Nm / litre / 1000 cc
97,6 Hp / litre / 1000 cc
Stage 2. Race engine
-Schrick 280 Camsaft (inlet/Exhaust)
-Adjustable Camgears
-Whit orginal airbox and exhaust manifold
-Hestec ECU
352 Hp / 6650 rpm
415 Nm / 5200 rpm
117,4 Nm / litre / 1000 cc
99,6 Hp / litre / 1000 cc
Stage 3. Race engine
-Inlet camsaft 296 made by Mauri Virtanen, Finland
-Exhaust camsaft 280 Schrick
-Adjustable Camgears
-Cylinderhead works by Hannu Makkonen, Finland
-Throttle body M5 3.8 (S38B38) 50 mm
-Inlet valve 38 mm
-Wiseco Piston BMW M3 2.3 (3580 cc)
-Compression ratio ~ 11,2:1
-Stock cranksafth + conrods
-Whit out orginal airbox + ITG Megaflow special made air filter
-Orginal exhaust manifold
-Hestec ECU
390 Hp / 6900 rpm
424 Nm / ~6000 rpm
118,4 Nm / litre / 1000 cc
108.9 Hp / litre / 1000 cc
Stage 4. Race engine
-Inlet camsaft 296 by Mauri Virtanen, Finland
-Exhaust camsaft 280 Schrick
-Adjustable Camgears
-Cylinderhead works by Hannu Makkonen, Finland
-Throttle body M5 3.8 (S38B38) 50 mm
-Inlet valve 39 mm
-Wiseco Piston BMW M3 2.3 / 94 mm
-Compression ratio 12:1
-Stock S38B36 Cranksaft + stock conrods (3580 cc)
-Whit out airbox
-Stock air horns
-ITG Megaflow special made air filter
-Adjustable race exhaust 6-2-1 + exhaust pipe made by Marko Roni
-Hestec ECU
435 Nm / 6100 rpm
4000-7000 rpm + 410 Nm
121,5 Nm / litre / 1000 cc
417 Hp / 7000 rpm
116,4 Hp / litre / 1000 cc
Stage 5. Race engine
-Inlet camsaft 296 by Mauri Virtanen, Finland
-Exhaust camsaft 280 Schrick
-Adjustable Camgears
-Cylinderhead works Hannu Makkonen, Finland
-Inlet valve 39 mm
-Wiseco Piston special made (bore 94,5)
-Wiseco light weight piston pins
-BMW M5 3.8 stock cranksaft (3785 cc)
-BMW M5 3.8 stock conrods
-Compression ratio 12:1
-Steel flywheel 4 kg + Alcon 184 mm twinplate clutch
-Piston-, conrods-, cranksaft-, flywheel all balanced (single + together)
-Adjustable stainless steel Race exhaust 6-2-1+ stainless steel exhaust pipe made by Marko, Finland
-Whitout airbox
-Adjustable air horn
-Special made ITG Megaflow air filter
-Haltec E11v2 ECU
470,6 Nm / 6000 rpm
4000-7000 rpm + 420 Nm
124,3 Nm / litre / 1000 cc
436 Hp / 7000 rpm
115 Hp / litre / 1000 cc
I’m not selling engines or parts, because tuning (whitout owerchargin) engines is only my passion. I'm not even using the engine in a E34 body, we have fitted it to a BMW E30 M3 -model car that is fully equipped to race but fully legal to use in traffic.
With the last Stage 5. -engine, I'm also tuning a non-turbocharged engine M5 3.8 litre (S38B38) 3795cc race engine, that has experienced all the possible changes to get better. Our passion is to make the most powerfull non-turbocharged M5 3.8 (3795 cc) engine there is in the north side of the world.
The accomplishment is to achieve over 490 Nm of torque (+129,1 Nm / 1000 cc) and plus 475 Hp (+125,1 Hp / 1000 cc) of power.
Later, I can report more about the engine project…
Best Regards
Jari Valtti, Finland
Ps. Fotoalbum; http://Camber.kuvablogi.com/
http://www.youtube.com/watch?v=uz1v06_wbik
