Very upgraded LPG Scimitar MV6 build

[owelly]

Fingers crossed matey.

[Renrut]

Hope its just that then! It's not possible to adjust the ECU to accept the other type?

[loz]

I don't know, the Canems Folk mentioned some adjustment early in the emails but depite asking about it when I sent the ECU back, they never mentioned adjusting it again.

I'll explore that avenue with them again if all else fails.

[danielo]

Nice one, it looks good.



Profile Cutting

[loz]

I've had about a day on the car in the last 5 weeks , but I had the opportunity to get a CRO on the sensor and have a look at the signal. I don't know what I'm looking for really, but its served a purpose, I've emailed it to the ECU manufacturer to see if its in spec (ish) for their ECU.

It looks pretty clean to me. I'm guessing the three "humps" are compressions (as its turning on the starter motor) and the spike is the gap of 2 teeth giving the ECU a possition as well as speed. The second photo is with the siemens sensor (thats another £40 down the pan then).




More to come (in another 6 months )

[majic79]

What kind of sensor is it? I was think it's odd for a hall effect sensor to look like that, but an eddy current sensor produces similar output. Looks clean though, so that's a good sign.

Assuming you're measuring the signal at the sensor, can you open up the ECU, plug the wiring in and make a measurement actually on the ECU's wiring (I'm not familiar with the Can-ems units, but the ECU's I've looked at have a plug at 90 degrees to the main board, so there's some easy to reach metal pins on the back of the ECU) - this will prove that the wiring is good up to the ECU and that it's getting that signal.

Also, there's usually two voltage supplies from the ignition key, have you got the ECU power on to the correct supply? One of them breaks when the key is the "start" the other stays made while the engine's cranking - it's important (for obvious reasons) that the ECU is powered/switched on, on the correct one

[loz]

I could give it a try but its a new (and tested) ecu so I'm reluctant to open the sealed unit.

The ECU has a perminant power from the battery, so its not that

Thanks for the suggestions.

Still waiting to hear from Canems with the latest email.

[loz]

A little update.

I've since tried it with the ECU connected, and its very much the same. I've measured the eccentricity of the trigger wheel too, and its less than 0.2mm out with a gap of about 1.5mm (not the 3mm I'd previously thought.

David at Canems kindly put another ECU together for me with "reduced sensitivty" I'm afraid the ECU bit is a little beyond me, but it should be more tolerant of a weak signal.

Got that through in the post the other day and tried it, Exactly the same thing happened

So I tried the loom they send through too, its just got the power wires and the CPS signal wires and thats its! Its completely free of anything on the car, and anything I've made, I even connected it to a different battery to the one that was cranking the negine, it still showed the problem! This is now far beyond my understanding, I'm hoping hte ECU fairy will fix it one night while I'm sleeping.

I'm waiting to hear back from David at Canems again now, I can see my only two options being, get a different ECU (different make) or fit another trigger wheel on the engines front pulley.

More to come

[Renrut]

Where abouts in the UK are you?

Might be worth a PPC forum get together to bang heads and point out the giant microwave ecu-death ray at the corner of your road

Or could you drag it to PPC in the park? Get some bods around it and try everything. Sometimes a second pair of eyes can see straight away what you've been looking straight past for weeks.

[loz]

I'd love to drag it to PPC in the park, I'll definately be there, but I've not got the means to bring the car unfortunately

Anyone is welcome to come and cast a fresh eye over it, I'm towards the worcester side of herefordshire.

I'll post when I get a reply from Canems

[Renrut]

Herefordshire is a bit far for me unfortunately, I'm in Merseyside. I don't often make it sound of Brummieland. Just thought a second pair of eyes might spot something.

[loz]

Hello again!! I've found a little time to mess about in the garage. I've mostly been cleaning up everyone elses s***, but its all sparkly now:



So I've started looking into the next idea to fix the engine running problem. I'm going to machine up the engine pulley to become the new trigger wheel and mount the sensor up front. Here are a few photos of the front end and pulley.






I really really really really can't wait to have this part of the project behind me, and get back on with finishing the car.

Next port of call for today is to find a new inverted to get the lathe running again.

More to come.

[loz]

I've ordered the recommended crank sensor for a machined front pulley , the 3rd one now!

Anyway when I had dropped the CRO off with my friend, we had time for this fun beforeI returned.......






So a few months back I went to see my good buddy pete, (we were at uni together) now most people would be happy to laze about and catch up but not pete, first thing saturday morning we were off to the scrappy to get the bits to make a jet engine.

We got did it, we made a jet engine in well under 48 hours and fired it up that weekend, its was a lot of fun. Pete did the research before I got there, he did lots of cutting and lateral thinking around problems, and sourcing the parts, I did the calculations for the flame tube and the welding.

When I turned up this time, he and another friend have mounted the jet in a BBQ!!!!

What an Amxing BBQ, we fired it up for the first time in its new home, and it cooked a sausage in no time!



Here's the bit me and pete made:


This is how to start it with the leave blower:


And antoehr vid of it running:


Cool or what (well maybe pointless)

[mitsuru]

OMFG Fireball XL5!!

Now that needs to be at party in the park
Cooking bangers of a different kind

[loz]

Thats a great point I'll try and get it to the next PPC in the Park






So I finally gave in and ordered another CPS, and a great opportunity presented itself. I needed the pulley machining to make a 36-1 trigger wheel to give this ECU its best chance of working.

A student at college, on a higher level course was looking to gain some experience in the workshop, so I asked him if he would like to machine the pulley for me....... The following photos are the amazing results that were achieved.

Initially the inner surface was cleaned up a bit to register correctly on the indexing head on the bed of the milling machine.


Then the pulley was mounted in the milling machine then Ben used a 7mm cutter to mill out the teeth before turning the pulley 10 degrees to cut the next.






He was even kind enough to clean up the part afterwards.


I owe Ben big time for his excellent work, and can’t wait to get the sensor through in the post and make the mount up.
More to come