I've got my 350 RamJet running on a '730 ECM with a modified LT4 BIN. I'm trying to learn so I thought I'd post some data of the engine running at idle and ask y'all if it looks ok. OR if something looks out of whack.
So, how does this look at idle? Should I move something around? I'm using AutoProm for data gathering. Timing moves around from ~17 to ~24.
GENERAL
0.65 volts..........Throttle position
0%....................TPS
203 F.................Coolant Temp
205.7 F..............Startup Coolant Temp
13.6...................Battery Volts
13.3...................Voltage @ fuel pump
0 mph................Vehicle Speed
725 rpm.............Engine Speed
255 RPM/MPG....NV Ratio
29.80.KPA..........MAP
287 seconds......Engine Running Time
FUEL TRIM/MIXTURE
14.73................Target AFR
723.72 mv.........O2 Sensor
239 crosses.......O2 Cross Counts
126....................Integrator (INT)
124....................Block Learn (BLM)
5........................Block Learn Cell
0.66 mSec..........Injector base pulse width
IDLE / IAC
700 RPM.............Desired Idle Speed
31 Steps.............IAC Motor Position
SPARK, ETC.
17.23 degrees....Spark Adv Rel to TDC
7.38....................Spark Adv Rel to Ref Pulse
0.........................Knock Count
0.000..................Knock Retard

 

battery voltage is a tad low and you're running slightly rich

 

I don’t have a 730 but on my GM specifications over the 165 the TPS should have 0.54v with a tolerance of +/- 0.075 that means that a max. of 0.615v and a min. of 0.465v and according your information is
0.65 volts..........Throttle position.
You can adjust that with a digital voltmeter.
Regards,
Cobra289

 

I was wondering about that TPS, I guess I should tweak it into the 0.54 range....hope it doesn't knock every out of whack.

The battery voltage varies between 13.6 at idle to 13.9 as it revs up...since it seems to do ok, I probably won't do too much there.

It's the first data I've logged since I started tweaking the VE tables.....geez! I thought it was gonna be easier.....I need to go for a long drive at different RPMs so I can gather more info before I adjust the table much. When I first loaded the BIN the BLMs was running at 108.

 

You dont have to worry much about where the TPS volts are so long as they arnt excessivly high with the throttle closed. The ecm automatically self calibrates the tps on startup and uses whatever voltage is present with the throttle closed as the baseline to get the %TPS.

 

the 730 should have the TPS non adjustable and around 62-64

 

and it says the TPS volts should be .70 to .80 at idle...I think I'll take it up to .70 volts.
Thanks everyone.

 

Isnt the ramjet manual for the computer that comes with the ramjet?

 

If you're using the GM ECM and GM sensors, I'd set it to GM spec.

 

Just to nit pick but they're both not GM ecm's, and then again they are... sort of . In anycase, what Dim said is about right, set it so it's within range, I don't touch it unless it's below .5 or above .8v.
Everything looks good to me. Your MAP looks really good at idle so I'd leave everything as is and start tuning spark.

 

Whatcha mean?

 

his manual is for a GM marine ECM thats atleast 2 gens away compared to the 730.


and dont move the TPS.. the 730 automaticly sets its lowest voltage as 0%... so as long as you're getting enough that it sees WOT as 100%, dont move it.

 

ANYONE NEEDING A WORKING 730 RAMJET BIN IS WELCOME TO EMAIL ME. I HAVE ONE ONE FROM A HT383 GM CRATE ENGINE .I STARTED WITH S&P'S "CUSTOM" BIN(A JOKE) AND HAVE IT WORKING WELL AFTER MAJOR CHANGES. REALLY REAN RICH FOR A WHILE.. SHOULD WORK FINE ON ANY 350 BUT WILL NEED TO CHANGE CYL. DISPLACEMENT NUMBERS IN CONSTANTS, BESIDES THAT IT IS A GREAT STARTING POINT FOR ANYONE NEEDING A RAMJET 730 BIN.

 

I think your caps lock *might* be on . On moates.net there is a file server where you can upload your bin and people can then download it to their hearts content.