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Oh, and if the hood is mint I might also take it if I can somehow transport it safely.. re amemiya ecu also looks tempting as do the injectors :p and maybe some other misc parts

Do you have a bit more info about the engine? do you think the front rotor/housing would have survived? I am picking up a car this sunday in conventry, so if the the engine is still somewhat useable for parts I could drive by to pick it up

What are the effects of negative split at idle? I will be mapping my first rotary soon, it\'s a renesis 6port we put into a miata for circuit racing.. it\'s is running on a MS2, and I will try to keep the "3 stage" inlet manifold operational to maximize area under the curve.. I have a good idea about a starting point for afr\'s, but little about what timing/split I should run..
 
I plan on running around 12:1 at WOT, and around 13:1 or a little leaner at light load, but the engine will spend 90% of the time on full load or no load..

lower CR and more boost is the way to go, this will give lower PCP\'s (peak cilinder pressure in pistonlanuage) this pcp\'s going over xxxbar will lift you head, bent rods and induce detonation
 
I\'ll give an example, as I\'m a dieselman, I run lets say 17:1 CR and 2.4 bar of boost, this will give a pressure before combution of approx 180 bar, now lets say I run stock CR of 19.5:1 and run 1.8 bar of boost I get also a pressure before combustion of 180bar the difference whne going from 19.5 to 17:1 CR is relative small, but the amount of more toque I can make running .6 bar more boost (assuming rest of engine etc is all capable) is huge
 
in rotarylanguage this pressure means risk on detonation and risk to blow a waterseal
 
also the arguments being made that bigger ports : more torque are vague, especially for NA engines, as huge port NA engine will have less troque down low, and probaly only at high revs a little more, but this little more at higer rpm give the typical plenty of increase in HP, this is because bigger ports: lower gas speed, less %VE at low rpm\'s and worse scanvenging, same with a piston engine, big cams  and ports : less torque at lowe rpm\'s
 
just my 2c

you don\'t need to idssabemtle the file, it works like this
 
you look at the file, you\'ll find most of the mapping as I showed in some pics, then you mark those in the file, then you load the file in the emulator, then when an adress is read by the ecu it is marked in the hexdump, so where you marked the maps in, this way you can easily find the axis value etc
 
I once used an OLS300 emulator from a friend with winols, you can trace live in the maps/file where data is being read, and make on the fly adjustments with engine running

is there any software in which you can see which parts of the bin are actually used by the ecu?

Isn\'t it the easiest for a low modded car to use stock fuel ecu and a sort of direct port piggyback ecu to control the lpg injectors? I\'ve seen some of these setups, works real easy, ignition is done by the stock ecu, when driving on lpg, the stock injector pulses are intercepted and used as a baseline for the lpg ecu, in the lpg you have 3d maps available to finetune the lpg injector duration versus the pertrol injector duration based on some inputs, like rpm, temp.. this way closed loop operation etc all works, the lpg delivery is independant on lpg "rail pressure", as there is a sensor on the rail and the lpg ecu also has a map signal so the total quantity of lpg is unaffected when running boost/vacum
 
In school we have a project with hydrogen fueling a normal petrol engine, and it seems they\'re using just a motec ecu and lpg injectors (2 per cilminder), high pressure hydrogen tank (so gaseous storage), but liquid or chemical storage are also possibilities

I wonder if it\'s possible to make a daughter board using a surface mount pic that would replace the processor and ROM, as long it has the same inputs/outputs to the logic board, you can then provide facilities like USB connection or serial port direct to the board, so you\'ve got programmability. I presume some of the ROM space is just tables, and some is code - might have another look at my spare ECU and see what\'s possible to achieve.
 
The other posibility is to replace the digital board outright - as all the ECU sockets are on the analog board This would make the choice for processors quite wide.
 
I like what that guy\'s done with the ECU tester - that was something else :Thumbs-up
 
Give the A to D chip is 16 channels but 8 bit (256 values), the tables can not be bigger than 256 cells. Quite likely they are smaller.
 
Just out of interest Ruben, what was that software that displays the mapping tables. I presume were are looking at timing, but what\'s the other table ?

I think those 2 upper ones are timing, trailing/leading, and the others are probaly fueling related.., problem are the factors/offset with these 8 bit ecu\'s, this is much less of a problem with 16bit ecu\'s and when you have to possibility to log every in/output
 
I use winols to work with the bin\'s..
 
a good way to learn things is when you have a emulator, so you can view in realtime the places where the data is being read, like for instance you can do with motec ecu\'s and probaly most of the standalone\'s, and have the possibility to change data in realtime
 
anyone has a 27(c)256. emulator.. prof..?

I tried to read it thru the backside of the board, so I slided a socket on there and that in the eprom reader but the file doesn\'t seemed like correct at all :/ can it be that it\'s corrupt because of reading it on the board? a bad connection is also a ....bility as it used to be covered in epoxy too on that side

I got also a N374 RE-Amemiya C-type ecu, when you plug it in car with oem boost control system it settles nice at .8 bar midrange and tapering off towards redline, this is a feature the other remapped ecu I have doesn\'t do, so with those you need to run a separate boostcontroller..
 
Altough it seems the RE-Ameiya ecu is the superior ecu, it is much more responsive off boost, and seems to have more torque with equal boost..
 
Too bad the eprom is epoxied on the board :/

Anyone already tried to remap the stock ecu.? maybe if we gather knowledge we can find the correct maps/value in the bin and then the need for a piggyback or standalone is gone..
 
I\'ve readout a tuned ROM, and asked Prof for a original file, so I can spot the differences..
 
the main problem is I do not have experience with these 8 bit FC ecu\'s, so I do not know the factors used in these maps and the axis locations, as I usally map 16 bit Bosch diesel ecu\'s for VAG TDI\'s (msa15, edc15 & edc16), and I have little experience with petrol ecu\'s, altough I know the principles of the working of these engines quite well..
 

 
Here you see some of the changes made in the maps..

if you look on the site at the projects tab, it seems like it\'s a rotor without cooling passage (unlike the old sachs aircooled engines) so it seems the rotor gets no cooling? also the rotor bearing is not lubricated by premix oil/fuel as in most of these small engines, so this means cool intake charge... but very hot rotor/bearing