I'm looking for a BIN to start playing with the 730 ECM. I just wired my 730 ecm to my Ramjet 350 engine. I wired it in parallel with the MEFI controller...so I have it available in case I mess up the 730 too bad.

I've tested the wiring by plugging in the MEFI and the engine runs fine. So unless I cross connected something from the 730 it should be super. I've got an O2 sensor and MAT sensor wired up to the 730 ECM (Ramjet doesn't use them, runs stinky rich all the time...one reason why I'm doing this). I connected all the other sensors from the Ramjet to the 730, which really just consisted of the CTS, MAP, and Knock Sensor.

Anyway, any suggested bins?

Thanks,

jcj

AXCN is a manual vette bin, AXXD is manual f-body (305) bin. Either way you'll have to adjust ve and spark.

-- Joe

Thanks. I've got an Autoprom so I can emulate this bin. I set my initial timing to 6 degrees since that's what I could find concerning 730 ECMs. (It still starts fine on the MEFI even though it likes 10).
It's really just a standard GM 350 c.i., 9.4:1, Vortec headed engine. Stock specs are ~350 hp@5200 rpm and ~400 lb-ft @ 4200 rpm.
Any suggested setpoint changes in the bin just to get it started and idling?

I run 10d initial on my car, and in the bin. Car likes it better that way.

355 cid, 2.02/1.60 72cc heads, 8.96:1 compression ratio. Moderate (280/288 .502/.510) cam. blower.
All motor car ran low 13s. @ 3600 lbs. So I figure 350 or so w/out the blower??


-- Joe

Do you use a different bin when using the blower? If you do, can I get a copy of your naturally aspirated bin? thanks.

my n/a bin has waaay too much timing for your setup, so please don't try and run it without either importing a timing table from
AXXD, or lowering it.

it is located at:

http://members.cisdi.com/~anesthes/p...Current-8D.bin

I'm using $8D for boost right now. Using PE to add fuel under boost, have timing locked in at 1800, and no PE timing add.

I'm using the code from the wb_02 hack to add a second MAP to my car so I can log 2-baro stuff in aldl. I plan on, in the very near (perhaps this weekend) future to start by adding a timing reduction constant. Very very simple - remove 1d of timing per psi of both. There is TONS of extra room in the bin for this.

If that works, then I'll add a bpw multiplier, which i'll prolly just use a constant for fuel % increase.

My FMU i used (vortech) when I had it, increase fuel delivery by 7.16% per psi of boost. So what I'd prolly have is a constant for % increase that directly effects the BPW.

A lot of people might say that the while-in-boost fueling methods in $58 are more advanced than my idea (which is a software clone of aftermarket) but in my experience with $8D to $58, the part throttle (which we spend more time in) is a heck of a lot nicer in $8D.

-- Joe

Whoa, I think you can't share thermistor type temperature sesnsors i.e. CTS simultaneously with 2 ECUs. The way an ECU measures the resistance is by a voltage divider which has a resistance in the ECU that would be sensed by the other ECU thus changing the temperature measurement. We always use 1 temp sensor per ECU to avoid this when we have dual ECU control. One way around this is to completely disable and disconnect the opposing ECU (from the CTS) with the parallel wiring scheme. When I've done this, I don't completely disable either ECU, so I can do on the fly switching, but it requires another sensor.

Could you explain the wiring a little better? If you do have switches that disconnect the CTS from one ECU while on another, you would be OK (assuming total control is switched). But, if you have say one ECU doing fueling, and one doing spark and IAC at any time, then Temp sensors can't be shared.

Later,
Jeremy

I paralleled all the leads to the common sensors, added MAT and O2 sensors for the 7730. I only use one ECM at a time. It runs fine on the MEFI; it barely runs on the 7730 right now; I'm emulating using Autoprom and a 90L98manual bin I found on the net--barely runs and it's really rich...it won't even start on the stock bin.
I'm going to take readings tomorrow and check if I'm getting some weird commands from the 7730. I'm pretty sure I did something oddball with the injector drivers....