Slow burn project- T1 Speeduino EFI

[Bruce.m]

Yes, those are very similar to the version I bought. Although at least on that website they do make it clear it needs cutting/ forming to fit properly.

I preferred my method though. Very easy to cut and fold the heat shield to enclose the sled tins. Also, a sheet of the double layer version, big enough to do both sides was £18 GBP delivered and I don’t need to buy/ use exhaust wrap too.

[Piledriver]

That stuff is pretty slick, can be had in aluminum, 304 or 321 SS, and lamination stacks with various ceramic/fabric inside fillings.
Some of the oem setups are slick, appear to be hydroformed or die pressed laminations with further reflective and heat barrier coatings optional.

The multilayer SS material may be sufficiently strong to fabricate "tins" from with perhaps some wire forms for edges.
Just search for embossed heat shield.

[Bruce.m]

Not much to update. Finished the ignition leads. Need to finalise a wiring diagram to figure out the routing of 12v, 5v & ground wires for set up. Also got my order of control cable parts from a motorbike supplier which I need to make up the throttle body linkage.

[Bruce.m]

Also. Waiting for a CB performance cam sync to arrive which will replace the distributor. Was looking at a DIY cam sync solution but with the CB Perf item being reasonably priced there wasn’t much point.

I also picked over the Honda bike wiring harness to check over the relays that it included. There were 3 in there and all of the same type, made by Omron. Looking up the data sheet, these look a nice quality item and they include a coil bypass resistor to short coil emf which is a safety measure to protect the ECU. So I’ll reuse these relays (main power & fuel pump)

[Bruce.m]

Cam sync arrived. Nicely machined part I have to say and made-in-USA I imagine. Doubt it would be any cheaper if made in PRC. No instructions but I’ll figure it out.

[Bruce.m]

Will replace the connector with a deutsch style item to be consistent.

[Piledriver]

That looks almost big enough to put a 36-1 wheel in.

[Bruce.m]

Might be possible, although the sensor might need replaced if the current item needs a magnet to trigger it.

[Bruce.m]

For future reference. The central rotor is approximately 22mm diameter and the bore in rotates within is 28mm. That’s too small for a module 1 spur gear with 36 teeth. Would probably need to be 24 teeth or use a smaller tooth size which might be difficult to read.

[Piledriver]

Alas I was thinking more of the od/form factor, the 36 tooth spur gear I run measures 38mm od.

The $6 ATS667 sensor I run has a built in magnet, and worked to ridiculous RPM on an ms3.
Weird: I had to fill in rather than remove a tooth or it basically didn't work at all, the internal AGC or something was baffled by the OD variation or such from a missing tooth... It might only care due to the small tooth size.
Thats how it became a 36-2 .

The sensor and the pair of caps and resistors it needs all easily fit in a 3/8" thin wall brass tube, wrapped with a little cello tape and then filled with epoxy.
(smd caps/resistors, wires out the end)

A tiny pcb would of course be better for production, but a metal cased epoxy filled sensor is probably more bulletproof in use.

I shold say 5/16" tube, the one in the car is actually a reamed out bit of 304 SS tubing...had to sand the corners of the sensor a touch... but I know the 3/8" brass is easy fit, cut and available at any hobby shop. I also used that for the shaft "adapter" for the gutted -009 as it fits snug in the gear, and a pair of orings centered things nicely.

[Bruce.m]

I’d previously screen grabbed your method & saved it. Have the same sensor chip & a steel spur gear in stock too. But I never got the distributor conversion done. Seems a good approach though & it’s last well for you.

[Bruce.m]

Also, I did notice that the sensor chip is directional. The gear needs to rotate the teeth past the chip face from pin1 to pin4. A reverse direction inverts the output signal polarity.

Also, the supporting components are potentially covered by the speeduino PCB which includes the supply rail cap and pull-up resistor plus cap on the signal feed.

[Piledriver]

...

Also, the supporting components are potentially covered by the speeduino PCB which includes the supply rail cap and pull-up resistor plus cap on the signal feed.

For noise reasons I would put the caps as close as possible to the sensor. Best practice and all, also use "chip" caps... better freq response.
(all the junk on mine is about 1mm off sensor case, directly soldered to the legs)
Pullup can work either way.

They make db connectors with ferrites built in on every pin... but a few big ones on the cable ends do the job well.

[Bruce.m]

Bit more progress today. Sorted exhaust with sealer on the clamps. Wiring for the IAT and CT sensors is done. Wasn’t very impressed with a clone EV1 connector parts, especially the terminals & seals. The genuine connector on the coil pack was very different. Will remember that for future purchases. Just the cam sync and crank sensor wiring left, I think. The ECU end will be done after the engine is fitted.

Throttle body linkage is next on the list but the laptop I run CAD on is not playing ball anymore. Will need to source another machine so I can design the brackets.

Did get the fuel rail clamps printed in Nylon CF & fitted so another item checked off.

[Bruce.m]

Refurbed thinkpad T490 i7 arrived yesterday & it’s partly set up now. Appears to be a well looked after machine during it previous corp life and the battery is also in good shape. Probably paid an extra 50 over the cheapest T490 on eBay but definitely worth it for the high spec processor, extra memory, genuine AC pack, good battery & condition. This is my 3rd “used” thinkpad purchase, the other two switched to Linux when windows performance wasn’t good enough but I need windows for Fusion360. I’m currently using an X Carbon for work & I noticed the AC chargers have nearly identical manufacturing dates. A new laptop at the same price would be a significant step down in build quality!