Cosworth supercharger for the NC

Sailor · Postby **Sailor** » Sun Jan 30, 2011 11:23 am

Hi Matt, Don´t quite get how the mixture is being controlled without feedback from the O2 sensors. Is your addon ECU actually a piggyback type with the std ECU nowrunning in closed loop?
If so you´ll need the sensors installed in the exhaust before you try running the engine hard or you´ll end up with schrapnel even with the most desirable internals.

zombie · Postby **zombie** » Sun Jan 30, 2011 1:49 pm

Hi Rob

The Adaptronic runs open loop only, ie using maps of throttle position vs RPM vs load vs temperature etc

The factory Mazda ECU runs open loop when under full throttle - and even the XEDE forces the Mazda ECU to go into open loop sooner so that it is more predictable - and using a single map, so I'm not sure what you mean.

Closed loop is normally used only to fine tune at part throttle and cruise, mostly to minimise emissions and maximise economy. At open throttle things are happening too fast for any ECU to keep up.

Perhaps in a few more years we will see more powerful ECUs that can keep the perfect mixture settings at all times by using all the sensors, until that happens all ECUs use lookup tables.

Sailor · Postby **Sailor** » Fri Feb 04, 2011 8:56 pm

Awwwww....me bad....Too many margheritas before posting.
Still I'm home now..back to the grind..

Sailor · Postby **Sailor** » Fri Mar 04, 2011 5:06 pm

Had that thing tuned yet Matt?

zombie · Postby **zombie** » Sat Mar 05, 2011 1:30 am

Hell Yes!

and I am stoked with the result.

Finally got some new tyres yesterday so I can actually get the power to the ground in every gear now. The old tyres were fairly shagged and first gear was smoke gear...

Looking forward to the MX-5 Club Sprint on Monday...

Sailor · Postby **Sailor** » Sat Mar 05, 2011 2:26 pm

Whoa!!!!
That IS impressive....

zombie · Postby **zombie** » Mon Mar 07, 2011 11:06 pm

And... I got video :mrgreen:

See this thread for details

Is this giving you inspiration to get yours installed?

Sailor · Postby **Sailor** » Thu Mar 10, 2011 11:15 am

Inspired I am...though I need to complete our bathroom and front verandah renovation first.
BTW, some discussion here
http://forum.miata.net/vb/showthread.php?t=411974
re installing a catch can to reduce oiling of the intercooler.

Postby **orx626** » Mon Mar 21, 2011 6:50 pm

Hi Zombie, did you change out the standard crankshaft for Cosworth's forged item with a keyway machined for the crankshaft pulley and drive sprocket (rather than the friction joint)?

Cheers,
Danny

zombie · Postby **zombie** » Tue Mar 22, 2011 1:08 am

Hi Danny

We did not change the crankshaft - used the forged one as supplied by Mazda ('09 engine)

- Matt

greenMachine · Postby **greenMachine** » Tue Mar 22, 2011 8:33 am

Have you guys seen this? Apparently swallowed a bolt ...

http://www.miphotoboothpics.com/Cars/su ... 7502_AxqJd

:mrgreen:

CoffeeBoss · Postby **CoffeeBoss** » Fri Apr 01, 2011 6:39 pm

BBR NC review

Adrianvh · Postby **Adrianvh** » Fri Apr 01, 2011 7:24 pm

I'm on target to have mine installed by Sept-October

Lucky_Luke · Postby **Lucky_Luke** » Mon May 09, 2011 11:05 pm

Apparently there's another kit fully installed on one of the MX5 Club NC 's over here in SA a month or two ago but am yet to see it out on a club day.

I will eagerly await its meeting

L.