Scottish Elises

I wonder if any one can help me?
Some of you already know I'm getting Lawrence Hoy's Ex super 7 back on the road for track days . Now I have it up and running and absolutely flying down the road .I was trying to obtain a Map for a standardish 1.8 on plenum and not throttle bodies so I can compare it with my own Ideas . See if there is a difference . As it is it passed an MOT with IACV set on manual and no enrichment . Got that map saved and now I want it right at low throttle . Its very close but need to know if I may have gone in the wrong direction Hope someone can help.
Best regards Martin

Hi Martin,

Been a while since I played with an Emerald... What spec is the engine and how are you doing the mapping? Are you using closed loop fuelling via the O2 sensor at low loads and do you have a wideband O2 available? If you just want a peek at some other maps available, there's a few at the site below.

http://tripleeracing.co.uk/academy2004/emeraldmaps/

It should be very possible to get the IACV setup and working right.

Cheers,

Steve

Hi Steve already seen that site, they are all on TB . Mines works with narrow band lambda not tried closed loop yet ,My Iacv settings working quite well . But unfortunately for me I need every bodies elses idea to settle on the right one . In motor racing I've always listened to what the others are saying but always made my own mind up .... sometimes totally different to others . In reality , I've got an ECU that I have tweaked myself its cost nothing and I want to confirm to myself that I am on the right lines . I have E-mailed emerald and D Andrews and never got a reply ,yet they did reply to other questions though . I think it may be a Closed shop Situation . Anyway thanks for the reply ,nice to know are people out there who will help if they can . Cheers Martin .

I suggest you get a decent wide band lambda sensor and hook that up to the ECU, then use auto-learn mode to correct the fuelling. It will be easier in the long run ...

Thanks Robin will investigate going down those lines

As Robin states, mapping a car without a wideband sensor is going to be challenging - get the air/fuel ratio for open loop fueling right first, then start looking at the ignition tables. Once you're sorted here, then start refining by introducing closed loop fueling, throttle enrichment, open to closed loop transition and injector phasing tweaks (if required). The limits will change radically with engine temperature, air temperature and air pressure, so there's going to be a lot of work involved in the warmup maps also, which you've got a short window to work on in real time.

Does the Emerald software have datalogging facilities? There's no substitute for having real data in front of you and wiring the wideband into one of the analogue inputs of the emerald will be one of the best things you can do. I have an Innovate LM-2 wideband exactly for this purpose and wouldn't consider mapping a car without it. Also, while mapping on a dyno is great, gathering data while driving in the real world can be just as effective, if not more so for part throttle drivability tests. If you can rig up a datalogger and a wideband sensor, there's nothing to stop you sharing your logs here if you've got specific questions or issues to work through during the mapping process.

With a bit of work, you can have a car that will run very well indeed

Note that the ignition tables distributed in the standard 1.8K map (there is one that comes with the emerald software, I believe) should be pretty much correct and I wouldn't go meddling with them too much.

On the EU3 the injectors can be run fully sequentially, but not sure if the Caterham loom has wiring for this - more likely it runs the injectors in batch mode (two pairs, kind of like wasted spark). In any case there is little to be gained anywhere other than at idle - sequential injection in EU3 is there to improve emissions at idle, not performance.

The emerald does have logging, but it also has an automatic adaptive fuel trim map that you can then apply to the main fuel map if you think it's correct (can also be done in zones - i.e. only push the 1K-4K, 0-50% throttle zone.

The way to do warm up map is certainly to get engine running hot first. Then turn off adaptive mapping/closed loop fuelling and leave the engine to warm up unmolested, logging the data (RPM, fuelling, lambda). From that you can work out a set of changes to the warm up map apply them, then repeat tomorrow when it's cold again.

Cheers,
Robin

sorry, late to this thread, but I've got the std 1.8 map from Emerald if you want plus a couple of generic maps also. Not sure what happened to your email to Dave Walker but I picked up a 2nd hard K3 at the end of August and they provided a couple of maps to get me up and running. Having been down for a mapping session, it appears to be crazy busy with phone calls from all over the world via-ing for Dave Walkers time.