jacky4566 Posted August 21, 2016 Share Posted August 21, 2016 Inspired by madkaw's idea I went and build a cam angle sensor for Megasquirt 3x. So here is a quick write up on how I did it. Please verify all dimensions for yourself as this is only just what worked in my case using the stock dizzy riser thing. Use a modern Jeep 4.0 Cam angle sensor. It fits directly into the L series dizzy hole. Can be had at wreckers for cheap. This one: http://dgzmd7u6z2by7.cloudfront.net/partimage/CPS/1ACPS00024/large.JPG alt: http://images.oreillyauto.com/parts/img/medium/a1c/30s4601-fro.jpg Cut shaft to length. 60.3mm from the mounting face to the cut worked for me. Could be a smidge more as an afterthought. Cut slot for pump shaft. I did this by hand with an angle grinder but you can be a little more professional. *The slot is offset! so measure each side with calipers and keep cutting until its perfect. It helps to have an extra pump shaft for test fitting or pull yours. As measured on the Jeep shaft one side will be 5.85mm at the thickest point and the other will be 4.45mm for a 3.2mm slot. Use the Jeep oil pump gear as a retainer. Flip it around and drill a hole (with a drill press! unlike this idiot) for the spring pin. Make sure to keep a small gap of 0.1mm between the gear and the washer so it doesn't bind. This will only work with a non-turbo since the turbo have a funky star shape instead of the simple slot. Wiring is simple: Orange - 5vref Black w/ Yellow - agnd Tan w/Yellow - MS3X cam input. Use internal pullup and set for open collector. 5.2.14.2 in the manual. I still need to scope it out for the correct voltage. So far 300km and it works great. no sync loss. Quote Link to comment Share on other sites More sharing options...
clear2me Posted August 22, 2016 Share Posted August 22, 2016 Great jop Thank you Quote Link to comment Share on other sites More sharing options...
NewZed Posted August 22, 2016 Share Posted August 22, 2016 Use a modern Jeep 4.0 Cam angle sensor. It fits directly into the L series dizzy hole. Nice find, nice work, and odd that it's a direct fit. How did you figure that out? Maybe we should start a list of CAS mount dimensions. Quote Link to comment Share on other sites More sharing options...
madkaw Posted August 22, 2016 Share Posted August 22, 2016 I figured it out a long time ago. Glad to see someone carried the torch on this. Good work!! Quote Link to comment Share on other sites More sharing options...
madkaw Posted August 22, 2016 Share Posted August 22, 2016 You can buy them new all day long for cheap also Quote Link to comment Share on other sites More sharing options...
HowlerMonkey Posted September 11, 2016 Share Posted September 11, 2016 I looked for the signal waveform and had not much luck. Any idea what the tooth count is? Quote Link to comment Share on other sites More sharing options...
jacky4566 Posted September 12, 2016 Author Share Posted September 12, 2016 (edited) I looked for the signal waveform and had not much luck. Any idea what the tooth count is? Not sure why you need this? Im almost certain its hall sensor with a square wave signal. Just use a pullup and set your voltage cutoff to 2.5v. Its a halfmoon wheel soo... 1? http://www.cherokeeforum.com/attachments/f67/80652d1323055504t-camshaft-position-sensor-out-alignment-img_1615.jpg Edited September 12, 2016 by jacky4566 Quote Link to comment Share on other sites More sharing options...
Leskinen Posted September 13, 2016 Share Posted September 13, 2016 Could be a stupid question but: does the key cut need to be in specific (correct) angle for tdc? Or can you program it to ms3? Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted September 13, 2016 Share Posted September 13, 2016 Could be a stupid question but: does the key cut need to be in specific (correct) angle for tdc? Or can you program it to ms3? Normally this would be used in combination with a missing tooth crank wheel to determine engine phase. The sensor can trigger just about anywhere except lined up with the missing tooth. Quote Link to comment Share on other sites More sharing options...
jacky4566 Posted September 13, 2016 Author Share Posted September 13, 2016 Yup, Matt already got it. There is a two different modes you can work in. Duel Wheel w/ missing tooth on main > The main wheel gets crank angle and TDC. The cam wheel is only used for phasing. Duel Wheel > The main wheel gets crank angle. Cam wheel gets TDC and phasing. Quote Link to comment Share on other sites More sharing options...
Leskinen Posted September 15, 2016 Share Posted September 15, 2016 Ok. Thanks for the info. Im looking for options how to ms my ignition and injection. This on its own is obviously not the solution (would have been a cheap one). Im thinking of going ms3 with expansion board (induvidual ignition with "smart coil" and sequential ignition. Wideband afr adjustments)... I guess I just have to try and find a turbo dizzy with optical cas or buy a cranck pulley with toothing. Are there any other possibilities? There are unfortunately few 280zx turbo dizzies/toothed cranck wheels in Europe. Quote Link to comment Share on other sites More sharing options...
madkaw Posted September 15, 2016 Share Posted September 15, 2016 "Cheap one" is to drill your flywheel and use it with a gear tooth sensor. 30$ and your time . Of course this does mean pulling your trans , but the benefit is a very stable signal Quote Link to comment Share on other sites More sharing options...
jacky4566 Posted September 15, 2016 Author Share Posted September 15, 2016 How much is a turbo dizzy now $120? Not really worth it for an inaccurate sensor. The shaft wobbles and can be off several degrees when load changes occur. IMO the best value solution is a 36-1 wheel mounted to the crank with a long bolt (10.9 grade) and a VR/ Hall sensor $70? Best value for a solid trigger. madkaw i dont really see the advantage to a flywheel setup, wouldn't you have to balance the wheel after drilling. Unless you have absolute precision in your drill holes. Then you have to muck about with making sure the holes are big enough to detect and the space and how do you handle TDC/ missing tooth? Quote Link to comment Share on other sites More sharing options...
NewZed Posted September 15, 2016 Share Posted September 15, 2016 I guess I just have to try and find a turbo dizzy with optical cas or buy a cranck pulley with toothing. Are there any other possibilities? There are unfortunately few 280zx turbo dizzies/toothed cranck wheels in Europe. This guy has moved on to bigger stuff, like complete cylinder heads, but he might still have some of these. http://forums.hybridz.org/topic/121177-just-finished-a-new-run-of-edis-mounting-kits/ Quote Link to comment Share on other sites More sharing options...
NewZed Posted September 15, 2016 Share Posted September 15, 2016 A late 80's Pathfinder/Maxima CAS and distributor can be made to work, kind of like this Jeep sensor swap, but with a little more work on the L6 mounting stand, the hole is 1mm too small, and the stand is 5mm too tall. Then you could use DIYAutotune's replacement trigger wheels. https://www.diyautotune.com/product/54-mm-optical-trigger-wheel-for-nissan-l28et-or-vg30e/ Quote Link to comment Share on other sites More sharing options...
Leskinen Posted September 15, 2016 Share Posted September 15, 2016 (edited) This guy has moved on to bigger stuff, like complete cylinder heads, but he might still have some of these. http://forums.hybridz.org/topic/121177-just-finished-a-new-run-of-edis-mounting-kits/ Thanks! Great info! I just contacted Derek. Jacky I couldn't agree more . Edited September 15, 2016 by Leskinen Quote Link to comment Share on other sites More sharing options...
HuD 91gt Posted September 17, 2016 Share Posted September 17, 2016 You could always use ms with your stock dizzy, as long as it's not a points system. Quote Link to comment Share on other sites More sharing options...
Leskinen Posted September 26, 2016 Share Posted September 26, 2016 Hi again. More questions... Could you guys confirm that if I want sequential injection I will need camshaft angle for MS III&MS3x (Can do this with the jeep CAS). But with only (NO cam angle sensor) the 36-1 trigger wheel I can use batch injection and still use the ms3x board injection outputs? But they just won't inject sequentially. What I would like to have is a system that would control my fuel and spark (and air to fuel ratio). I would like to use the ms3x outputs for injection and induvitual ignition (ls2 coils). Im buying the needed parts little by little: - I have bought the 36-1 trigger wheel kit from derek (with edis vr sensor) - I have wideband O2 - I will need (240sx 2.4?) throttlebody (TPS). Will euro 200sx (sr20det) throttle body do the trick too? Can the L28e tb be used? - I will need ls2 coilpacks - I will need ms III and the ms3x with suitable wiring - What sensors can be used from L28e or do they all need to be replaced with newer sensors (water temp, tps...)? Have people installed knock sensors? Thanks -Juho Quote Link to comment Share on other sites More sharing options...
jacky4566 Posted September 26, 2016 Author Share Posted September 26, 2016 Hi again. More questions... Could you guys confirm that if I want sequential injection I will need camshaft angle for MS III&MS3x (Can do this with the jeep CAS). But with only (NO cam angle sensor) the 36-1 trigger wheel I can use batch injection and still use the ms3x board injection outputs? But they just won't inject sequentially. What I would like to have is a system that would control my fuel and spark (and air to fuel ratio). I would like to use the ms3x outputs for injection and induvitual ignition (ls2 coils). Im buying the needed parts little by little: - I have bought the 36-1 trigger wheel kit from derek (with edis vr sensor) - I have wideband O2 - I will need (240sx 2.4?) throttlebody (TPS). Will euro 200sx (sr20det) throttle body do the trick too? Can the L28e tb be used? - I will need ls2 coilpacks - I will need ms III and the ms3x with suitable wiring - What sensors can be used from L28e or do they all need to be replaced with newer sensors (water temp, tps...)? Have people installed knock sensors? Thanks -Juho I think your post gave me cancer...Please make your own thread instead of hijacking mine. You need to know the cam phase if you want FULL sequential. You need either the sensor discussed here, the Turbo dizzy, or some device of your own creation. You can do Semi-sequential with just a 36-1 crank which i would suggest if you're not possessed like many of us here. - Throttle body is not required. I use the stock TB with a 90s nissan TPS grafted onto it. Just butcher the stock TPS for a mounting plate. - I will need ls2 coilpacks. Or Toyota coil packs, i think they look much nicer than Coil near plug. - What sensors can be used from L28e or do they all need to be replaced with newer sensors (water temp, tps...)? Have people installed knock sensors? New sensors are recommended. Someone here has all the bias information. Do a search. -You will need MS3x or mspro for full sequential none of the others have enough I/O. Quote Link to comment Share on other sites More sharing options...
Leskinen Posted September 26, 2016 Share Posted September 26, 2016 Sorry Jacky! Didn't mean to hijack your thread... I got carried away as I sometimes unfortunatelly do. Thanks for the answers however. I'll continue this shomewhere else or make a new one (and read more). Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.