Archive for September, 2009

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More Programming

Tuesday, September 29th, 2009

OK, well after a phone call to Motec, I have got the dash talking to the ECU, and got the sensors all calibrated. Getting the sensors calibrated was not the easiest thing, and in fact took the all day to do! The problem being that Motec didnt have them in their pre-defined list and the sensors were just effectively variable resistors. However the M400 can only read in a voltage, and not knowing the rest of the circuit I couldnt change from one to the other. I have sure there will just be either a pull up or down resistor and the voltage will come out between, or something similar.

It also turns out that the document I had from AIM had a typo on the CAN address, hence the inability to get them all talking. Pop in the right address and bingo, it all suddenly worked!

So, depending on time on Sunday after the Britcar 500, I will try to get the airbox, overflow bottle and/or GCU sorted. hmmmm looks doubtful!

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Programming

Monday, September 28th, 2009

The wiring is now at a state where the ECU, GCU and dash can all be programmed etc. Obviously the map is already in the ECU but some auxiliary sensors needed configuring aswell as inputs from the GCU and outputs to the dash. I first tried to install the software for the dash, this all went well until trying to install the usb drivers! This then took about six hours. I have now worked out how to do it (the documentation just assumes it works)! Then the GCU. Once the ash had been installed the GCU usb drivers suddenly started working aswell. I think the dash had just messed everything up! Now the ECU. There was an instant problem with this in that when I plugged in the download cable it would connect and the disconnect continuously! A thought struck me so I disconnected the loom and used the dyno loom and all was well. I then thought that perhaps the dash was messing up, as it had caused a few problems already! I disconnected it and suddenly everything started working!

Programming 

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New Isolator and Extinguisher Wiring

Monday, September 28th, 2009

Avid readers will notice the recent theme of all things wiring. And the saga continues! In a previous post I said I was using a really very nice small electronic isolator. However having tried to use them on the 935 a few things have come to light and we have decided to bin them and go for the more traditional type. This has caused a few wires to have to be extended and moved, but it should all now work! Yes it looks like the sort of thing you find in your fuse box but we have used these on the Lotus and they are really good! You can also see where the extinguisher control box is mounted.

Switch Panel 

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Air Ducting

Monday, September 28th, 2009

Now normally I would be VERY against deliberately making something that would have a negative effect on the aero, BUT engine life is more important. The current setup of the car means that the engine bay has no real moving air. If however there was some moving air causing the hot air off the headers to be blown out the back, and perhaps causing a little cool air to be blown over the engine, that would have to be a good thing! So, I have added a naca duct in front of the engine as seen below. This obviously removes some air from the floor but hopefully will help engine life and keep everything a little cooler!

Naca Duct  (more…)

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Door Catches/Hinges

Monday, September 21st, 2009

Whilst trying to assemble to doors I was stumped! I have no idea why, but it seems that the door hinges no longer line up?! In all honesty I was never happy with the door hinges as the door didnt open fully and it was going to be slightly difficult to get out. I also never liked the external hinges! So I scrapped them!

What I have decided to door now it to make the door removable. The idea being that the top of the door has a aluminium plate with a return that hooks under the door aperture and then the catch locates the door at the bottom at both the front and back.

The first component is the arm to operate the locking rod that runs along the door. This has to be slotted as the pin in the original locking rod would bind up as it would be forced to move through and arc.

Slotted Hinge  (more…)

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