Alky tuning with WB correction in the 6.0

[TurboBuRick]

I wanted to see if the stumble/miss would go away in batch fire mode.

AFR in the mid 10's with alky is not bad.

BLM of 115 at wot is still pulling max fuel. You could further lower wot cell.

 

[WS6]

I wanted to see if the stumble/miss would go away in batch fire mode.

You still thinking ignition module or crank sensor?

 

[TurboBuRick]

You still thinking ignition module or crank sensor?

Took me a long time to finally nail down the same condition on my car. I replaced the entire ignition system and still had the problem. Coil pack, module, crank sensor, cam sensor, plugs, wires, everything. The one thing that made a difference for me was adjusting the crank sensor. Others will say I'm nuts but it worked. Seemed like I could move the miss to a different rpm by re-gapping the sensor to a different tolerance. The book calls for .025 I think. The tighter I would go the better it would run. Thought maybe the reluctor ring was messed up so I replaced that then slightly modding the sensor bracket so the sensor would ride more flat on the blades. I gapped to a tight .010. My car now doesn't miss a beat.

If your confident your ignition system is up to par then I would look into this.

Good luck Rich!

 

[WS6]

I changed parameter #4 to 107.But before that I went through and re-adjusted the crank sensor and spent more than an hour getting it just right. I also went ahead and gapped my plugs down to .029 from .032. Those are the two things that seem to keep coming up as successful fixes for the high RPM break up. And I see what you mean about fitting the cam sensor bracket,it's slightly cocked. I don't know what you mean by gapping it tight at .010,it's a fixed width reluctor ring riding inside a fixed width sensor?

I turned the alky knob back to 4 which is half way. And this is my log. I got some knock up top but it appears that I'm still too fat

But the better news is that the high speed break up is all but gone, there is something happening at the upper boost levels but I'm starting to think I'm at the limit of the stock actuator's ability to control boost over 20lbs.
The long and short of it is that I'm able to drive through it,per say, rather then hitting up against it and I seem to have gotten some MPH up top that wasn't there before.

After the laptop's battery died I made some un logged runs and on the same stretch of road I was able to get up to 115 whereas before 105 was a wall.

Anyways...here's the log



....

 

[Razor]

Alky is to suppress knock, turn the knob up. Dont turn the alky down to lean it out.

 

[WS6]

Alky is to suppress knock, turn the knob up. Dont turn the alky down to lean it out.

See,that's where I'm fuzzy on the application of alky. I read and read and get conflicting info,so maybe you can clear this up for me.

Is methanol suppressing knock by adding octane? or is it lowering combustion temperatures? or both??

I read people saying it's like adding a 7th injector of fuel,true? And I thought it was to run the knob as low as no knock or very little would show and then trim the fuel up or down.

And I read other people's thoughts that too much alky makes the car lay down on the big end of the run?

 

[Razor]

If you start to turn the knob way down you can make the system lazy. That in itself can lead to in-consistent pressure delivery from the kit. If you want to run way less alcohol, it is better to run on a smaller nozzle and higher GAIN setting than lower GAIN setting on a larger nozzle.

Too much would be position 7-8 on a car running 18 PSI with a stock turbo and an M15 nozzle. And.. too much while it can possibly make a car lazy wont make it knock. That riding the crest of knock on a street car is the wrong thing to do. Crest=borderline knock.

Put the alky Gain knob on 6. Tune the fuel. Thats all you need to do. If it gets knock.. go to 6.5-7. And work on it from there.

Yes to octane, yes to cooling. So both... YES

Dont run it on 4. It wont prime properly every single time.. and will lead to inconsistency. If you want to drop it to 4, please call and order an M10 nozzle and run it on a higher setting.. like 6-7.

HTH

 

[WS6]

Put the alky Gain knob on 6. Tune the fuel. Thats all you need to do. If it gets knock.. go to 6.5-7. And work on it from there.

I will do this first and work the chip....thanks!