Hi mate awesome build so far, haven’t gone through and read it all yet but just came across an old video of my old GQ when I had the 25det in it..thought I’d share. good fun. It was originally an rd28.
So it kinda self learns in close loop? It has a knock sensor too? I like the look of the Haltech unit, kinda contemplating putting one in before going turbo and see if there is much difference in power and fuel economy, I recon you could get another 10kw and better low down torque with a better ecu with knock control
Yep it does self learn, to a point. It saves the short term trim values that it has to make to meet the lambda targets, as long term trims. Which you can then choose to apply to the base fuel table. Which resets the long term trims back to zero. Idea being that eventually the long term trims get really small.
No knock control in this one, would have to go to the elite 2000 or 2500 to get that. Or a 1500 (4cylinder) and use wasted spark and batch injection. I'm not too stressed though, I just use a little clipon wireless radio mic. Low-tech but it works ok. Still, not too keen to push the timing on it till I get it on a dyno.
I agree that it would be interesting to see what a modern ECU does on a NA motor. Way better economy I would say. Also just so well behaved compared to running a carby. I'm a full EFI convert now. I love it. Apart from the whole artifact that is an ECU, it's waay simpler.
That would be a good easy way to go about it. Gotta get the wideband controller to go with it regardless. Don't think any of the elite range have it built in.
Was thinking about the whole conversion, and having heard that even the old Nissan ECU gives better economy over the carby despite doing batch injection, I'm thinking the shift to sequential injection alone should be worth a bit of extra mileage.
When I changed from carby to efi I only got slightLy better fuel economy, I had my carby running sweet around 15-16L per hundred, which was what I got out of my VL turbo, my mates na Calais gets around 10L per hundred. The main reason I changed to efi was due to the carby running out of fuel on steep hills. I also thought that sequential injections and more timing with 98 and knock control and wide band would bring a bit more power and economy
Wooo, exciting times here today. Mucking around with new injectors and flooded it. Took plugs out and decided to risk a quick starter spin with extinguisher in hand. Whoompf. Was less than a second from turning the key to the spray of petrol and then the flames.
Turns out the OEM bonnet lining is anything but flame retardant. My gosh. That thing burnt fast. I had the whole lot out in less than 5 seconds but the liner is completely melted and wrecked.
No damage to anything else, just loads of melted liner bits to pick off everything.
Turns out the flooding was caused by a stuck on injector. Bit average as it was brand new, apparently flow-tested and matched. Calling bull on that one and going to get some from a brick and mortar shop.