Thanks for the data. That gives me a good idea of what I could expect if I switched to some sort of cold air setup. Would be nice to get a 0.5 psi drop with no increase in IAT.

 

Now that the temps are starting to drop around here, the car is having the typical cold starting difficulty. Its been about 60 deg F in the garage when I start the car in the morning and around 50 F when I start the car outside in the evening. By increasing the cranking IPW adder values corresponding to the temperatures mentioned, the motor now lights up on first crank, but after running briskly for about 2-3 seconds after light up, the rpms drop off and the engine dies. It seems that there is a fuel enrichment decay time that I need to find and adjust. Its probably one of the ones that Mattjin mentioned and have been working to define those tables correctly, but I'm not quite there yet. At any rate, once I get control over the decay values, it seems that the car should start up as easily on E85 as it does with gasoline, at least for mildly cool weather.

 

Mrfred, any updates on your cold start with E85 tuning?

 

So far, I've only had to deal with about 45F in my garage when I start the car in the morning. I was going to wait a bit for cooler temps, but its definitely safe to say that the startup IPW table is doing the trick at 45F. This became especially obvious to me last week when I reverted back to an older ROM that did not have higher IPW values at low coolant temps, and the car did not want to start. It actually took me a few days to realize what had happenend. Once I realized it, I flashed in the tuned values, and the next morning, the car started like a champ. Anyhow, here's my current table (keep in mind that the car hasn't seen startup temps much below 7 deg during cold start):

 

Appreciate the picture. I am having startup issues, multiple cranks to start, and stalling once started.

 

I forgot to mention that I also have the cold engine retard routine disabled. This may be helping with startup as well. The car does tend to shoot up to ~1900 rpm for a few seconds on startup. The high rpms bothered me at first, but I'm used to it now. I suspect that the initial high rpms are due to base ISCV values tuned for lots of retard, and lowering the relevant ISCV values in the base ISCV table will fix the issue. Haven't experimented with this yet though.

 

I've had some guys tuned on E85 that had startup issues as soon as it dropped below 50F here in Northern California. Adjusting the cranking IPW like mrfred posted above fixed the issue.

I have a guy that it cranks over on the first crank now in 38F temps with no stalling.

Obviously this is much warmer than the eastern and mid west will see but still cold enough to show a starting issue.

 

I started mine this morning in 28 degrees and the car fired one crank...adjusting the cranking ipw is def. the answer, still need to work on my mid/hot temp settings but the cold starting was more my key this time of year.

 

As Bryan knows we've tried quite a few things on my car with no luck but mine has an AEM in it.


Any other suggestions to try out?

 

With an AEM your first mod for starting should be the triggerdisc CAS setup.

 

MrFred: have you noticed any changes in driveability with the advanced timing in the cruising load cells? how does it feel? and how much timing are you up to now in the crusing cells?

 

My experience is that the car feels the same during cruise with a relatively wide range of timing advance in the cruise cells. In the 30-40 load column which covers around town cruising, I feel no difference between 38 and 42 deg of advance in the timing table. (The EGR advance algorithm will add several more degrees to push the actual timing something like 44 and 48 deg.) I haven't pushed beyond 42 degrees. I was going to try to do some testing with jcsbanks live tuning ROM, but I haven't taken the time to do it yet.

 

Well the temp being in the teens have made the cold starts extremely hard, last night I had to crank it multiple times in order for it to start but once it is warm or luke warm, the car starts fine.

 

mrfred youv'e probably covered this now but i did successfully lower the initial
starting rpm that was 1900 ish as you say to virtually what ever you want it to be with adjusting iscv settings using evoflash
i hated to see my motor scream upto 2k before the oil pressure really is all around the engine. not to mention the noise

 

Yeah, I figured that would do it. I need to do it as well. What cells did you change?