# Thread: B3601 value for E10

1. ## B3601 value for E10

i have it set for 14.12 afr.... so it changes my B3647 accordingly...

*NOTE* I RUN IN OLSD....NO MAF

question is....

should i leave my crusing and part throttle @ 14.39 afr and my wot @ 12.07 ( changed to this automaticly when i entered 14.12 (stoich for E10) afr in B3601 )

OR

leave my crusing and part throttle afr @ 14.91 and my wot afr @ 12.50 while still maintaining 14.12 afr in B3601 ( B3601 set to 14.63 afr )

remember E10 is roughly 1/2 point fatter in AFR....

ALSO, E10 is at every gas station now as far as i know

THOUGHTS????

THANKS

2. The percentage increase for PE or WOT should be a constant, so I would leave it as is.

3. leave WOT @ 12.07 AFR....????

4. Originally Posted by WHYTRYZ06
leave WOT @ 12.07 AFR....????
12.07 x 1.035 = 12.49AFR

12.07AFR on E10 is equivalent to about 12.49AFR on E0 (regular fuel).

Source: http://forum.efilive.com/showpost.ph...&postcount=169

5. Originally Posted by Epox4life
12.07 x 1.035 = 12.49AFR

12.07AFR on E10 is equivalent to about 12.49AFR on E0 (regular fuel).

Source: http://forum.efilive.com/showpost.ph...&postcount=169
rite so leave it at 12.07 afr... for E10

6. I know this is an old thread, but I encourage anyone who's tuning for E10 to actually test the fuel they use. A chemist at a racing gasoline blender told me a couple of years ago that most of the ethanol blended gasoline on the retail market is actually somewhere between 7 and 8% ethanol rather than 10%. I've also tested several samples of ethanol blended gasoline from premium gas pumps in my area and sure enough, they all were about 7-8%.

As a result I assume it's all E7 and set my stoic value at 14.2:1 = lambda 1.0.

7. Originally Posted by Hib Halverson
I know this is an old thread, but I encourage anyone who's tuning for E10 to actually test the fuel they use. A chemist at a racing gasoline blender told me a couple of years ago that most of the ethanol blended gasoline on the retail market is actually somewhere between 7 and 8% ethanol rather than 10%. I've also tested several samples of ethanol blended gasoline from premium gas pumps in my area and sure enough, they all were about 7-8%.

As a result I assume it's all E7 and set my stoic value at 14.2:1 = lambda 1.0.
+1

I agree...

and the test kits are cheap.

8. "Test kit"? I didn't realize there was such a thing.

I guess I made my own test kit. I bought a graduated cylinder from Amazon. I put 100 ml of pump gas in it then add 10ml of water. Shake it up then let it sit. After a while the ethanol and water "settle out" at the bottom. Say you have 100 ml of gasoline "floating" on 18-ml of ethanol and water that's about "E8".

9. Yep, that's what the test kits are for about \$5, some include a water soluble dye to better see.

10. I'm about to start Tuning my 03 sierra and am wondering... do I need to change my B3601 to 14.12 - 14.2(depending on alcohol content) before I start tuning? I'm assuming yes.

If yes, do I then need to change the information in the software for my dual LC-1 Widebands pertaining to lambda?

Thanks

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