So what do you think about this ECU?
Turbo Mini Forums

Hi,
I found this via a link from a post on here, I thought it strange no one had mentioned it on here....
http://www.canems.co.uk/index.htm
I've had a good look at the specs and instructions and it seems to have most of the bases covered. What do you think?
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

The owner will be on here shortly I understand...

He doesn't want to sound 'pushy' having recognised all the hard work that has gone into everything this far on the megasquirt - but equally is interested in selling his own kits.

Wait and see... :)

We have discussed it indirectly a couple of times.

He had a stand at MITP.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Hi,
I should get out more
The thing I'm thinking about, is what has already been mentioned on here about running W/B sensors pre turbo
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

I think that if we want to calibrate fuel injection on a 5 port turbo, then we have to forget about widebands and use EGT.

I'm planning on trialing the siamesed port code on my NA 1275 with dual widebands. Then measuring EGTs so that we understand the relationship between AFR and EGTs.

Hopefully we will be able to fully understand the temparture effects of the double flow on the centre port.

With this information, I can then setup the siamesed port code on my 998 turbo.

That's the plan anyway.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Hi,
That'll be interesting to see the results. However, it would rule out this ECU as it doesn't measure EGT.
Unless of course you buy another system to datalog EGTs
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

You cannot simply tune on EGT, there is not enough information

On 7th of Dec, 2007 at 10:15pm Bat said:
Hi,
That'll be interesting to see the results. However, it would rule out this ECU as it doesn't measure EGT.
Unless of course you buy another system to datalog EGTs
Cheers,
Gavin :)

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I think it looks a bit boxy to be honest. But if you're into square I guess you'd like it. Whatever floats your boat!

Hi,
I see where you're coming from Paul.
If you can prove a strong correlation between AFR and EGT, you'll know the cylinders are in balance, then tune the fuelling with the downstream W/B
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

looks blimmen good and cheap too!

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Hi,
The price did catch my eye Robert
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

im guna say this again as it got rubbished last time, but to my mind i still cant se why it wont work. for dual wideband on a turbo motor with the widebands before the turbo what you need to do is drill and tap a small take off in the centre and an outer runner, close to the port as possible, you then use (for example) a small legnth of brake line to feed the exhaust gasses into a chamber where the lambda sits, then vent the chamber useign a larger bore pipe downstream of the turbo.

this will get rid of the pressure issues. the downside is it will take a little longer to come on boost as its equivalent to a wastegate being cracked open a wee bit.

but by drillign and tapping the manifold and useign the correct fittings you can install this setup for tuning and rthen remove it, leaving EGT sensors in tehre to tell if anythign goes away from an ideal. or a wideband downstream of the turbo.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Hi,
It's a good point, I don't know enough about the subject to know whether it'll work though. :(
I'd also be interested to know if you could map the injection timing with the wastegate wide open (Dual WB by head), then switch to a downstream W/B sensor and map the fuelling from there?
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

wideband sensors are also pressure sensitive, so even if heat was not a problem, Pressure would be. sadly

getting a bit OT now, but if you have a divorced wastgate the sensor will beed to be before the pipe that rejoins the exhaust as they are cooled by boost pressure.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

I really like evo's idea... :)

I also like the idea. Also, even if there is still residual pressure, if it is used for tuning the injection timing then the main issue is getting the same AFR for inner and outer cylinders so even if the absolute calibration is off as long as relative calibration is correct, injection timing tuning can be done.

Once injection timing is set and the O2 sensor relocated downstream then precise AFR tuning can be done. And if it is found that calibration is not really affected with the bypass setup then it could be the permanent setup which would allow monitoring on a continuous basis.

Jean

http://www.jbperf.com/

It doesn't feel right to me. To get enough pressure drop and enough flow past the sensor you will be bleeding a lot of air.

Don't have any rules of thumb to hand though to know if it is a real concern or me being a berk.

i was always under the impression the sensor doesnt require any flow atall, simply that it is surrounded by the gas to be measured, the only need for flow would then be to provide the sensor with new gas to sample. but i could easily be wrong! cant seem to find any evidence online that can give me a clear cut answer either way.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

MM, a PWM idle valve is not ideal when the MPi manifold uses a stepper.

It has some good features but lacks others

why would a PWM valve not be ideal in this case. Is it simply a fitment issue? Operationally I can see no problems

Not doubting the operational abilities of the PWM valve, but if you have a stepper, would it not be better to be able to use it, theres everything else on this thing but no stepper chip? Even Megasquirt has one of those?

Sorry for being negative!