Where can I find info about lockers for the C3's?

 

I'm not sure if there is any one good place to find info on lockers. It is basically an edge card setup that plugs onto the factory test plug on the bottom of your ecm that is now covered up in that nasty goo. It scans at close to real time, it's pretty cool, but I never had the time to put one together. The wiring schematics are over on the diyFTP site, but you'll still need a board to make it.

You might want to wait on the speed reader that is due out this fall some time. It will have all the features of the lockers plus the ability to run some really cool hacked out code that Rbob came up with, or your own code if you want to venture into that area of chip tuning.

 

Oh man the speed reader, can't wait, must have it now. Is there any thing I can do to speed it up from the 160 rate?

 

nope, I'm using the datalogger that came with my zietronix WBo2, it's working pretty good for AE and WOT stuff.

What are you having trouble tuning?

 

I'm just paroniod, its tbi 40 over 350 lt4 hotcam with some decent heads, the flow about 270 at .500 and a manual trans. I realy should have messed with the 305 first. I think I might fire it up this weekend.

 

Currently the only option is trying a P4 (1227749).

 

Yep.
But not for the reasons you might think. With a new engine it's easy to get excited, and who takes notes when they're excited.
Successful tuning is also about notes, and looking for trends. You have to be able to understand in part what the engine is telling you makes it happy.

 

Starting on my third note book tonight

 

Im using one of the outputs to transmit the ALDL data as standard RS232 serial data at 1280 bps. Its possible to go at twice the speed but it eats into the processor time since itll take 2x the time of the standard ALDL routine. Works great, only needs a 10k resistor, and if your romless it would jsut drop right in pretty much.

The down side is my computer software to generate teh data log sucks *** and it only does 20 bytes (18 of which are data) 8 times a second, unlike lockers which transmits all teh memory + WB O2 14 something times a second. Id definatly try to get lockers first. But if your romless and desperate for a faster datarate I can send you some stuff.

 

ftp://ftp.diy-efi.org/uploads/
Lockers0.zip and Lockers1.zip both contain some info.
BTW, Dim, lockers does more than just wideband, it's got 6 10-bit AIs so whatever else you want, you know, like a dual axis accelerometer maybe.
Oh, and right now it's 17Hz without any packet loss problems (was getting that often with 15Hz.
I've talked to RBob and asked him if it would be at all possible to go twice this speed. I think the limiting factor was the serial baud rate but most, if not all of the laptops I've come across support 115.2. I never tested them at the rate so I can't be certain it would work, I just think having 34fps would help even more so, not to mention the wow factor of going from 0.8fps to 34fps... that's one hell of an upgrade don't you think.
I also think a lockers for the p4's would be useful. Obviously it wouldn't be as impactful since right now the p4's have a decent aldl but it could work, doesn't look like it would be hard to adapt.
The speedreader is the answer to no more lockers.
Now if only we could get these p4's to double the RAM and control a CNP setup .

 

The only thing thats really kept me with the present system untill the speedreader comes out is the fact that its completly self contained, which means I dont have to worry about forgetting to put my computer back when it rains.

If the speed reader thing falls through then Ill consider switching over. I sure hope they get that thing done eventually. My system now can have a WB O2 in the stream and its jsut fast enough to make it useful but having everything in one neat package would be killer

 

JP, thanks for that link BTW. Think I had some of that before but I lost it in a HD crash.

 

What's the need for more RAM?.

 

I believe in overhead. Lots and lots of overhead. Do I NEED the extra RAM, probably not, do I need an emulator, probably not, do I like having all of my goodies, most definatly yes.
I've got a bunch of free time in the evenings now, might want to try putting a table in ram that is 16x16 to differentiate between my desired AFR table and the wideband actual AFR. I also have some accelerometers and a EGT thermocouple that might need some room.
Nitrous code maybe. As much as I appreciate the KISS I'm a scientist at heart. Give me lots of pressure transducers, coils, straing gauges, thermocouples, and solinoids... I'll be in heaven.

 

Not gonna find that RAM in a C3 or some other ECMs. Im jsut about out of RAM. Doesnt the 7749 have 512 bytes?

I also like lots of instrumentation and lots of extras but in a crappy problematic car like mine its just more to worry about. I try to keep things to a minimum wherever possible. If my car wasnt such a damn headache Id be more open to running lots of cool extras.

 

Thanks for the Info and links!!