i dont see how you are getting the .77 lamba math which is making your a/f 11.4 if your stoich is at 14.7 then your pe should be commanding 1.289 no?

 

The math is (commanded AFR)/stoich

So for example, if you wanted to run an equivalent of 11.5 on gasoline, and stoich is 14.7 then 11.5/14.7 = .78 (lambda)

^^in this case PE would be set to 1.278

14.7/14.7 = 1 (lambda)

 

So if he sets his pe to 1.278 or .77 the a/f is gonna be the s?ame

 

No.. You don't set .77 anywhere. You make a custom PID to read that. Something like [PID.6000]/14.7

where [PID.6000] is AFR Commanded Lo Res

If you are tuning based on Lambda, you need to read actual lambda, commanded lambda, and lambda err. You have to set this all up yourself in the scanner.

In my example, setting 1.278 in your PE table would be commanding 11.5 afr or .78 lambda. They mean the same thing.

 

k. thats what i was asking i think i read what they where saying wrong. because some of the guys are not reading lamba they just change stoich to 9.7 and just leave there guage to read gasoline which is the samething.

 

If you are doing this for E85 it's all wrong. First off you need to be careful when you say 11.5afr and .78 lambda mean the same thing. This only holds true for gasoline. .78 lambda on E85 would be 7.5afr and on E100 would be 7.0afr. Its much easier when you read everything in lambda as this is truly how a wideband reads it. If you want to display your E85 lamda from say an AEM wideband you would make a custom PID similar to ([AUX.50002]/1.49)/9.7. This would give you your actual E85 lambda in the scanner.

 

I'm aware of this.. I was speaking in terms of gasoline so that I could explain it to darkmanx. I started the sentance off with "In my example"

I actually configured a new user defined EIO port instead of using a PID to define Lambda. For example, for my LC-1, I configured the slope as follows: (Volts / 4.887) + .5 -- I set this to be a lambda sensor and display in units of lambda. This way it doesn't matter what fuel I have in the tank.

Bump?

 

the person who told me to set the afr to 10.4, is the one who builds the 1k injectors we both run. after some long talks with him on this subject, and the tests he has run on the fuel itself. id rather take his word for it. plus the variance of fuels month to month swing wildly in either direction. i am not going to retune my car every week i put gas in it.

 

^^ lol write it enough times?

anyone got a base ttune for e85. i need my car running today. anyone? pm me please

thanks


nvm u edited it lol

 

Your fuel trims should take care of fluctuations in mixtures.. at least the weekly ones (not the seasonal changes) that you're seeing. (I haven't noticed this problem in my area) Anyway, I guess I'll have to test on my own to get the answer I am looking for. Thank you though!

 

Hah. Hahaha. HAHAHAHAHAHA. Fuel trims. That's great lol. Trust me, 27 psi, 1000cc injectors, 40lb/min of air, fuel trims went out the door 100hp ago lol.

Also Area, I spoke to him today myself, expressing my concern for the trade off with these injectors as I could run the same top end fueling with the 79s as I could with these. The only thing these do different is idle like **** at 1.3ms. He said it sounds like I'm losing fuel pressure, which I may agree with, but mentioned nothing about raising the stoich to 10.4afr. While this makes sense to keep fueling in check and keep the ID1000s happy, the logic behind doing this is hard to grasp. Too lean on E85 kills power. .76 lambda on E85 configured for stoich at 10.4 would put the E85 afr at 7.9, which is pretty damn lean for E85 under power.

 

Sub'ed

 

Wowsers... lots of info to take in.

 

chea

 

Heh. Well ok whatever. I don't know anything about your car. I can only speak to my own experiences. Mine's running great. I'm looking forward to seeing your results as well as Area's with those 1000cc injectors.

 

my car idles way better on the id1k's vs the 79's. maybe it's because i am insane.

desired afr is all dependant on the car itself. it varies car to car. my car on meth loves 11.6 afr. any leaner it starts to lose power. i made the same power on 9.6 afr that i did on 11.0 afr. i tend to use a dyno for 6 hours at a time when i play on the rollers.

anytime i speak with paul, it's a 30-45 min conversation. there is a reason why i make the power i do


p.s. you're out of fuel pump.

i have put down 353/303 running out of pump at 6k rpms. traps 118 with severe boost limiting in first and second


when you get huge injectors. control of the trims is harder and harder to get to dial in. the edge of insanity on getting them perfect. i just deal with it. the trims do their thing. every could days i check em and make adjustments

 

subscribed

 

There are better E85 threads to be subscribed too.. jk

In my dyno testing with E85 I found little to no difference in hp going from 12 to 11.5 to 11 afr (converted to gasoline).

From my research I found most turbo convereted E85 guys like run right at 12. Personally I would Command 11 aft in PE and forget about it.

 

The car may idle smoother, agreed, but not as lean as it should. The ID1Ks stall below 1.3ms, unlike the 79s that can run at 1.0ms. I can't get closer than within 10% afr on E85 with the ID1Ks once the car is warm. Not sure how you are doing it without a return system, but it's just not physically possible to idle at even 9.0 afr on E85 with the ID1Ks idling at 1.3 ms and 58psi lol.

 

Well the M62 is gone....

This is only my review. Not an informational thread

 

since you're running e85 does that mean you need to run parkay instead of meth? hehe

 

I prefer real butter

:lmao:

 

but parkay is better than butter http://www.youtube.com/watch?v=5Z2_zOjF9ro

 

Real butter >>> fake wannabe butter

/end of thread jack.

 

Tom, you hush up yo face...that wadn't no thread jacking

~Mike~