tmellott89

So I ditched the $32B and went $6E ARAP for now. Changed all I needed for it to start (i think i have fan n\o switch right)and read a thread on here about hard starts so I changed crank pw where they said to. It fires right up cold but warm or hot it keeps cranking and I have to hold butterflies open for it to start. Idk if its flooding it when warm or not though. I've only ran it at idle but at idle Im lean at 129 ints and 149 blms. I went to MAF TABLE 1 raised the g\sec a little at a time while emulating and after awhile it went 132/136 and started surging then so i put back to factory settings for now. I understand how to change the tables for rich or leaner but how's it know an RPM or load. It don't seem like a very good way of fueling. Unless I'm missing something. I understand PE MODE completely though and timing is easy. Just fueling I'm not understanding and it's like I hit a rock. If anyone has tips or advice for fueling that'd be great. So far tuning wise I've changed injector constant the whole timing table bc it's too aggressive desired rpm idle and Max airflow vs. Rpm. Just need to figure out fueling yet. HELP.

RBob

iTrader: (1)

Fueling is rather straight forward, for X amount of air need Y amount of fuel. The MAF tables translate the airflow reported as a voltage into an airflow in grams per second. It is the gm/sec value that is used to calculate the require volume of fuel.

There is quite a bit of MAF information in the Tuning Guide Book sticky.

RBob.

tmellott89

Ive read the Stickies. I understand that it uses G/sec to calculate a pulsewidth but when changing the values in table, that's all there is, is G/sec. I just thought it should be VS. rpm or LV8. so your saying it don't matter what LV8 or what RPM its at, it will fuel the same at a given G/sec? I messed with the car again today. and at IDLE I got my ints and blms down to 124/126 and right before that it was 126/130 but id rather it be a tad rich, and also its idleing at 21.?? degrees. So I think ive figured out how to use the table now, just need more time on my hands and more datalogging.

RBob

iTrader: (1)

LV8 is derived from the airflow and engine RPM. And the RPM is taken into account in the injector PW calculation. As the injector firing rate is relative to RPM.

RBob.

tmellott89

I have another question I lowered my fan temps and also changed the mph for the duty cycle to 0 mph and fan comes on but don't stay on at idle. I would think that it should stay on when it's above the temp threshold but doesn't. Temps are set to come on at 180 off at 173 but temp will rise well over 200 and won't stay on at idle. I want it to stay on all the time once up to 180. Car runs horrible at the track when it's warm.

tmellott89

Got my wide band (LC-2) all hooked up this weekend to my APU1.Seems to work alright but the AFR in Tunerpro is about .5 higher compared to innovates Logworks3 software. Tunerpro reads it so fast it's kinda rapid and jumps around alot also. I'm pretty sure I have everything set up correctly in my adx file. Im not sure about how to fix that? I recorded a 20 min drive in tunerpro while watching the AFR in Logworks and seems to be off everywhere. Made one pull in 2nd and part of 3rdgear @wot it starts at 11.7 leaning out to 12.5 @5500 then 3rd starts the same slowly leaning out so I added more PE in upper Rpms. Driving around its a little lean everywhere. I've tried setting injector constant to correct injector but it seems like MAF tables aren't adjustable enough to raise them high enough. How bad is it to use injector constant to get blms in order? I keep getting to a dead end with MAF tables,then they don't look right. Also using crank pw vs.coolant I've added more fuel at start up and it didn't help start up when warm still won't start without opening throttle blades. I've already added to the crank pw multiplier vs. Ref pulse. Starts fine when cold just has trouble once warm.

Fred SS

iTrader: (3)

I had a weird problem with my fans. Using ARAP bin, my fans would come on at too low of a temp, way lower than what was set in the bin. I have a TPI swap in my Monte Carlo SS. So I unchecked the check box in the bin for "fan n/o . . . . ". The fans work perfectly now, come on at the bin set temp and go off at the bin off temp. Hope this helps in some way.


Fred

tmellott89

alright thanks for the reply, took me a little bit but changing the n/o switch did work but I found out that it kicks on when engine running, not just key on. but I got my fans figured out atleast so far thanks.im still trying to figure out my MAF Tables. I good at idle. but part throttle isn't very good yet. I got my BLMS down to 140 and INTs stay right around 128. which is better to go by? my wideband reads mid to high 14s cruising around. Idle is low 14s. I did add a good bit to PE, just haven't ran it anymore yet.also think ive figured out my cranking issue, haha I think I was flooding it when its warm. I lowered the constant in crank vs. coolant tables and it fires up first crank now. I loosened up my grounds today for WB and APU1 cleaned it really well but it still seems like there off a little between tunerpro and Logworks software.