Gazzar Posted February 9, 2020 Author Share Posted February 9, 2020 How focused is a crank sensor "field of view"? If I stuck a trigger wheel on the back of this flywheel, would the sensor be distracted by the ring gear? Just asking. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 9, 2020 Share Posted February 9, 2020 Well the ideal gap for EDIS is about 1mm, I'd imagine if the sensor isn't pointed directly at the ring gear you'd be OK. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 9, 2020 Author Share Posted February 9, 2020 Thanks. I'll see if I can put a trigger wheel on the back of this flywheel. If I can get it to fit, then it would give me cam and crank, if I ever go fancy MPI. Once I've the engine built I'll see if I've got clearance. How thin are these sensors? 5mm, 10mm? Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 9, 2020 Share Posted February 9, 2020 The Ford ones are ~10mm diameter, there's others that are bigger but have a little "pin" about 3mm wide sticking out that runs in a groove, ISTR the P38 flywheel one is like that. You could use ABS sensors too, they're the same thing. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 9, 2020 Author Share Posted February 9, 2020 Thanks. I was hoping to just use the inspection holder in the flywheel housing, I think that's not going to work. I'll look again when I get the engine assembled. I'm picking up the head tomorrow, it's been cleaned and the valves set up. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 13, 2020 Author Share Posted February 13, 2020 Total topic change. How fast do lambda sensors react? If the mixture is too rich, will the sensor know instantly? Assuming the ECU knows what it is doing, of course. Just curious. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 13, 2020 Share Posted February 13, 2020 Pretty much instant, otherwise you wouldn't be able to use them for tuning while accelerating. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 13, 2020 Share Posted February 13, 2020 32 minutes ago, Gazzar said: How fast do lambda sensors react? If the mixture is too rich, will the sensor know instantly? Assuming the ECU knows what it is doing, of course. Pretty damn quick - basically the delay is the time taken for the exhaust to get from the cylinder, along the pipe to hit the sensor. The caveat is that the sensors are relatively easily damaged or "blinded" by knocks or contamination - if you run rich enough, the sensor ends up coated in unburnt fuel and registers nothing (low volts) which looks "lean". Likewise burning oil or coolant. Physical impact can crack the element, and splashing through puddles / wading can cool it down below the operating temperature. Once you've got the thing running, reduce the lambda sensor's authority to +/-5% or so, just enough for it to achieve fine-tuning on cruise without letting it tweak the whole lot off into the weeds if the sensor fails. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 13, 2020 Author Share Posted February 13, 2020 thanks all, I'm learning, slowly. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 I think there's space for the trigger on the flywheel. If so, I'll do that. The crank and flywheel housing are in a set position, with the crank protruding by about 5mm above the seal flange. Mirroring this to the flywheeli think I've 8 to 10mm between the flywheel and the housing. Which is plenty. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 So I'll get a good friend to cad up a trigger wheel for me, and get it water cut. I think geometry will be required. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 The housing will have to be drilled for the sensor, I think I'll put it near the old timing indicator location. I can use the existing bung to locate the sensor mount. The flywheel is all clean now. I've a cold, so am only cleaning and thinking, to avoid messing stuff up! Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 Should I paint the housing? The Ali will get scabby. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 And the head is back! Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 I'm polishing my crank. 1 Quote Link to comment Share on other sites More sharing options...
Bigj66 Posted February 15, 2020 Share Posted February 15, 2020 Enjoying this thread 👍 No harm in painting the housing even though you don’t really see too much of it but it shows the MOT man that you care and pay attention to detail 😉 I’m no expert on painting but I’d imagine an etch primer of some sort would be enquired first as it’s cast ali? It’s great when the shiny bits start to arrive and you can look towards reassembly again. Looking forward to more progress. Do you have a final spec in mind for this engine? Will it be mapped fuel and ignition and if so will you use a MS or something else? What sort of power and torque would you be expecting to see at the end? Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 Final spec? Ahhhhhh, sort of. Single point injection, probably, with a series manifold. Exhaust is ACR system throughout, with ACR cam. I think it's an ACR stage 2 head, not 100% on that, it's at least 20 years old so Roland at ACR isn't certain, but the number matches his records. As to the ECU I'm between microsquirt and speedaudrino, probably microsquirt, as it's a more mature platform, and might be more robust. I've a friend who is adamant that a SU carb is better, but I want to play with injection, so I'm sticking with that. Power? No idea? 90+hp? Torque? 150 lb ft? As long as it can push the RRC diffs, and 7.50 tyres, I'm happy. I like spritely performance, and torque, so am focusing on grunt. 1 Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 I've finally painted the oil cooler, the oil adapters were sods to remove. Etch primer followed by zinc rich. I know I said Matt black. But....... 2 Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 Shiny........ 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 15, 2020 Share Posted February 15, 2020 Shiny and lovely 😎 Quote Link to comment Share on other sites More sharing options...
landroversforever Posted February 15, 2020 Share Posted February 15, 2020 That’s come up like new! Quote Link to comment Share on other sites More sharing options...
landroversforever Posted February 15, 2020 Share Posted February 15, 2020 6 hours ago, Gazzar said: Should I paint the housing? The Ali will get scabby. If you want to keep it looking nicer for longer, anodising it would be good if you’ve got somewhere near that does it. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 16 minutes ago, landroversforever said: That’s come up like new! So, matt black? Or stay silver? Quote Link to comment Share on other sites More sharing options...
Gazzar Posted February 15, 2020 Author Share Posted February 15, 2020 8 minutes ago, landroversforever said: If you want to keep it looking nicer for longer, anodising it would be good if you’ve got somewhere near that does it. I think I'll give it a coat of etch, then it will be duck egg blue with the rest of the power plant. Quote Link to comment Share on other sites More sharing options...
landroversforever Posted February 15, 2020 Share Posted February 15, 2020 4 minutes ago, Gazzar said: So, matt black? Or stay silver? Whichever is the most subtle when fitted? Quote Link to comment Share on other sites More sharing options...
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