Has anyone messed around with these maps for running E85? If so, what have you found that works well? Has this map made a huge difference in your cold starts or none at all? Just curious to see how people are approaching these maps. The same goes for the IPW adder map.

 

yes taking out a ton of the retarded ignition timing helps cold drivability ALOT, both on pump and E85. I think I made it 10%/10%/10%/5% instead of 100%/100%/100%/50%

IPW adder I have increased IPW at lower coolant temps and it has helped cold start on E85. This is exactly the same thing thing the E85 "cold start helper" kits do.

 

raxor is the 10/10/10/5 setup safe for 93 octane or would a more subtle approach be better?

 

Razor, you have numerically increased the ms from -8 to 20 or have you done something different? I have my baseline coolant trim map set pretty close to my high oct ign map and I didn't notice a difference between the "original" map or the one I put in.

 

I put 0% everywhere. Car became butter smooth to drive when cold. Who needs to light up a cat when they have none I don't think there's any other reason to have the timing retard.

I increased the IPW adder values for hotter temps, my 1000 injectors want a blip of gas when i start the car hot. It's a non-issue for me really, but maybe this table will improve this. I played with it a bit but as they say results are inconclusive for now

 

Yup pretty much

 

From -8 to 20 I have 49,27,20. Is that appropriate or should I go more or less.

 

The car fires right up on first crank and goes to about 1.6k(normal) and then it drops to about 500rpm- almost stalling, and then shoots back up to normal. It does this about 3 times or for the first 30 sec of start up. Any ideas what I need to do to keep it at 1.6k and stop the stall drop?

 

Cold start or warm start?

 

cold start- when it does start

 

I would venture to guess your injectors aren't dialed in really well yet.

At cold start it's open loop so if the scaling and latency isn't correct, the car will be grumpy as fuel trims aren't being used then.

 

I see. Any direction on which way to go on cold start? Awesome info once again. Thank you. Is the IPW function just a band aid for wrong latency values or does it really help once the correct values are dialed in?

 

get your 02feedback stft as close to 0 as possible and it should help the cold running weirdness.

The IPW map helps cranking start.

Everything works better usually when the injectors are dialed in well.

Thing about the tuning the cold cranking on E85 is you really only get one shot at it a day.

 

Tell me about it- so annoying. If front o2 is all over the place what should I do with the latency at 14v- raise or lower? From -8 to 20 I have 49,27,20. Is that close to what you have? Sorry for the obcious questions but the wideband is in the mail. I have .624 for 1000 fic's at 14v.

 

Even easier is just to disable it entirely using the periphery bit method. With morning temps in the low 50's in my garage, my car fires off like its running gasoline. Idle does shoot up to 2k rpm for a few seconds but then settles to 1500 rpm for warmup.