Mapping - Who\'s tried it themselves?

[Prof]

I\'ve found a few schematics for emulators. None of them look hard to build, and all work off a parallel port.
I\'ve also found a few commercial products, but they\'re expensive and no smaller than the DIY versions, and all have a ribbon cable from the box to the \'chip\' connector. I can make up one of the circuits given time though.
If you want it really small it\'d have to be SMT, and that\'s no so easy though.

I remember seeing a device in one of the electronic magazines - it was about the same footprint as a 28 or 32 pin chip but a bit taller - and had a USB connector on it.  Can\'t seem to find it now.

[ianelvar]

This?: http://www.progshop.com/shop/epromemulator/emulator.html

[Rub87]

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

[Prof]

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

If you can find a dissassembler for the DSP that\'s used in the ECU - you can dissassemble it - some of the dissassemblers are able to work out which is code and what is probably tables (based on it not making sense as code) and will give you some assembler output with labels and such.
 
I didn\'t find much on it - and it\'s not the same as the S4 ECU\'s either - so that excellent link on 16 paws site doesn\'t give us much info - except perhaps the algorithms used for fuelling and timing.

[Rub87]

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

[12at]

What sort of RPM and AFR\'s have you got yours idleing at BlitzBoy and with what size injectors?

[rotaryheaven]

great thread ive been looking at tuning my car in the near future once ive got some more knowledge on it, i found this online if anybody is interested.
http://http://www.innovatemotorsports.com/resources/FCedit_tutorial.pdf

[RamoNZ]

I cant get your link to work, but i bought an innovate guage, and a DIYPNP for a S5 13bt.
 
I\'ll be using tunerstudio which has AFR/VE seek for fine tuning - will let you know how I get on.

[rotaryheaven]

ok, doesnt work my end neither, ill tell you how i found it instead on google search engine type in tuning with a power fc, should be the 4th one down ,pdf file

[philiwily]

http://www.innovatemotorsports.com/resources/FCedit_tutorial.pdf
Thats the link

[kompactor]

I haven\'t read through the whole thread but, I have always done my own mapping. Usually tune on the street, but have used dyno before. I prefer street tuning as it puts more load on the engine and allows you to tune cruise maps.

Right now I\'m running datalogit + PFC + lc1. I\'m tuned up to 24 psi with water injection on pump fuel. My general rules in tuning rotary is keep it conservative and let the boost make the power.

Leading timing should be under 15* at 15 psi (1 bar)

Split under boost is between 8-15* split depending on where in the map I\'m at. Vacuum is 0 split and idle is -12 split (negative)

AFR\'s are 10.8:1 - 11.3:1 from 24psi down to 15 psi, below 10 psi they are 12:1, vacuum cruise is 16:1 low speed cruise under 50 mph is 14.7:1 and idle is 13:1

I haven\'t had the car dynoed but it\'s in the 525-550 RWHP area, smokes the tires in 1st 2nd 3rd and 4th gear at over 120 mph.

[Rub87]

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..

[kompactor]

Just makes the idle smoother on some setups. I\'ve only tuned turbo rotaries so I have no ideal whats ideal for NA engines. The dyno is the best way to figure that out.

[Steve-A]

Anyone got any more insight into trailing split settings? Especially those at 100kpa / 0psi / WOT n/a kinda range.

I\'m fairly happy I\'ve got my leading timing fairly well sorted and my AFRs. I\'m running an n/a s4 FC engine on stock ports with full exhaust, basic throttle body mods and a megasquirt ECU.

Idling at ~16 BTDC & 14.7:1.

Light cruise/ high vaccum at ~20 BTDC from 1.5k through ~30 BTDC at 4k to redline & 16:1

Normal cruise at ~22 BTDC at 1.5k through ~28 BTDC at 4k to reline &14.7:1

WOT at ~22 BTDC at 1.5k, up to 25 BTDC at 3k through 5k, then leading up to 27 BTDC at 7k & ~13.3-13.0:1 across the range.

Can post screenshots of my maps, inc trailing split, later but thought that would give a vauge idea of my approach.

But I\'ve just used the megasquirt base settings for trailing split and not touched it. This is where my rotary knowledge fails me a little. How much do I stand to gain/loose with trailing split tuning? Any tips on the basics from which I can experiment? and finally how \'dangerous\' is tuning the trailing split? as in if I were to experiment with it, how likely am I to cause det/other problems and ruin my engine

[ianelvar]

Hello chap. Sounds like you\'re heading in the right direction. If I remember correctly, running with less split has a similar effect to advancing the lead timing. There\'s a massive write up on rx7club.com that gets really technical. It will answer all your questions if you can find it. Good luck! Will post if I do find it.