Correcting an E85 Tune

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Apr 13, 2010 | 06:17 AM

#16

skiracer

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Hey old man, time for you to take another couple hundred mile trip to socal again:

2010 Evo X MR Touring
MSRP $41,735
Socal Evo X $36,999
EXCEPT WHITE AND BLACK

http://www.socalevo.net/index.php?op...&topic=95726.0

Apr 13, 2010 | 07:41 PM

#17

GST Motorsports

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From: Hayward

Quote:

Originally Posted by skiracer

Ya i'm getting old too :P Tranny shifts like a dream. Only problem is you can forget running E85 on the X MR as the tranny can only handle 320 lbs/torque... which can be achieved on pump gas and just a tune with no bolt on parts...

If you hold 320 wtq out to 7000 rpm you can make 426 whp.

I will be running E85 on my RA Sportback with SST btw.

- bryan

Apr 17, 2010 | 10:08 PM

#18

Jim in Tucson

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Here is a log from earlier today. I think I have pretty much eradicated the last remnants of lean spool.

EDIT: The boost was at 20psi. It spools up at approx 2,800 rpm. Stays reasonably flat to redline.

I'm open to comments and suggestions.

Code:

 RPM 	 TimAdv 	InjDuty	 W/Band 	Knock	 MAPafr 	 1Bite 
 1,688 	 21 	6.8	 15.0 	0 	 13.6 	 102.0 
 1,719 	 22 	7.5	 14.4 	0 	 13.5 	 102.0 
 1,750 	 21 	7.6	 14.1 	0 	 13.3 	 104.4 
 1,781 	 21 	8.1	 13.7 	0 	 13.3 	 108.0 
 1,844 	 21 	8.7	 13.1 	0 	 13.2 	 110.4 
 1,875 	 21 	9.4	 12.6 	0 	 13.1 	 112.8 
 1,938 	 21 	9.5	 12.4 	0 	 13.0 	 116.4 
 1,969 	 23 	10.2	 12.1 	0 	 12.9 	 118.8 
 2,000 	 21 	10.4	 12.1 	0 	 12.8 	 121.2 
 2,031 	 20 	11.0	 12.1 	0 	 12.8 	 122.4 
 2,094 	 19 	11.6	 12.0 	0 	 12.7 	 126.0 
 2,125 	 19 	11.8	 12.0 	0 	 12.6 	 128.4 
 2,156 	 17 	12.4	 11.9 	0 	 12.5 	 132.0 
 2,188 	 16 	13.3	 11.8 	0 	 12.5 	 134.4 
 2,219 	 16 	13.4	 11.8 	0 	 12.5 	 139.2 
 2,281 	 14 	14.1	 11.9 	0 	 12.5 	 141.6 
 2,313 	 13 	14.8	 11.9 	0 	 12.5 	 146.4 
 2,344 	 11 	16.2	 11.8 	0 	 12.4 	 152.4 
 2,406 	 9 	17.7	 12.0 	0 	 12.3 	 157.2 
 2,438 	 8 	18.4	 12.0 	0 	 12.1 	 163.2 
 2,500 	 7 	20.0	 12.0 	0 	 11.8 	 171.6 
 2,531 	 6 	21.1	 11.7 	0 	 11.7 	 180.0 
 2,594 	 5 	22.7	 11.7 	0 	 11.5 	 190.8 
 2,625 	 4 	24.9	 11.4 	0 	 11.5 	 202.8 
 2,688 	 2 	26.7	 11.5 	0 	 11.5 	 214.8 
 2,750 	 1 	29.7	 11.5 	0 	 11.3 	 228.0 
 2,813 	 - 	32.4	 11.6 	0 	 11.2 	 243.6 
 2,875 	 - 	36.0	 11.6 	0 	 11.2 	 258.0 
 2,969 	 1 	38.8	 11.8 	0 	 11.2 	 259.2 
 3,063 	 1 	40.1	 11.9 	0 	 11.1 	 259.2 
 3,125 	 2 	40.6	 11.7 	0 	 11.1 	 259.2 
 3,281 	 2 	41.7	 12.3 	1 	 11.1 	 255.6 
 3,406 	 3 	43.3	 12.3 	0 	 11.1 	 258.0 
 3,438 	 3 	44.1	 12.4 	0 	 11.1 	 256.8 
 3,563 	 3 	44.8	 12.3 	0 	 11.1 	 260.4 
 3,625 	 4 	47.2	 12.3 	0 	 11.2 	 264.0 
 3,719 	 4 	48.0	 12.1 	0 	 11.2 	 266.4 
 3,813 	 4 	49.2	 11.9 	0 	 11.3 	 268.8 
 3,906 	 5 	50.4	 11.9 	0 	 11.3 	 268.8 
 3,969 	 5 	51.2	 11.8 	0 	 11.3 	 268.8 
 4,063 	 5 	52.8	 11.6 	0 	 11.3 	 270.0 
 4,156 	 5 	53.6	 11.6 	0 	 11.3 	 271.2 
 4,313 	 5 	56.0	 11.7 	0 	 11.3 	 272.4 
 4,469 	 6 	58.0	 11.7 	0 	 11.3 	 273.6 
 4,594 	 6 	59.6	 11.7 	0 	 11.3 	 277.2 
 4,750 	 6 	62.2	 11.7 	0 	 11.3 	 279.6 
 4,875 	 7 	63.8	 11.8 	0 	 11.4 	 284.4 
 4,969 	 6 	64.4	 11.7 	0 	 11.3 	 289.2 
 5,125 	 7 	66.0	 11.6 	0 	 11.4 	 290.4 
 5,250 	 8 	68.3	 11.8 	0 	 11.4 	 292.8 
 5,313 	 8 	69.9	 11.8 	0 	 11.4 	 291.6 
 5,406 	 9 	70.8	 11.8 	0 	 11.5 	 291.6 
 5,500 	 9 	70.8	 11.8 	0 	 11.5 	 291.6 
 5,531 	 9 	71.6	 11.8 	0 	 11.5 	 290.4 
 5,656 	 10 	71.6	 11.8 	0 	 11.5 	 288.0 
 5,719 	 10 	72.8	 12.0 	0 	 11.5 	 286.8 
 5,844 	 10 	72.7	 12.0 	0 	 11.5 	 284.4 
 5,906 	 11 	72.6	 11.9 	0 	 11.7 	 280.8 
 6,000 	 11 	73.3	 12.0 	0 	 11.6 	 278.4 
 6,094 	 11 	73.5	 12.0 	0 	 11.6 	 274.8 
 6,188 	 11 	74.3	 12.1 	0 	 11.6 	 272.4 
 6,250 	 12 	74.1	 11.9 	0 	 11.6 	 268.8 
 6,344 	 12 	73.8	 11.9 	0 	 11.6 	 266.4 
 6,438 	 12 	74.5	 12.0 	0 	 11.7 	 264.0 
 6,500 	 13 	73.8	 11.9 	0 	 11.7 	 260.4 
 6,594 	 13 	74.6	 11.9 	0 	 11.7 	 258.0 
 6,656 	 13 	74.2	 11.9 	0 	 11.7 	 255.6 
 6,719 	 13 	75.2	 11.8 	0 	 11.7 	 250.8 
 6,875 	 14 	74.8	 12.0 	0 	 11.7 	 248.4 
 6,938 	 14 	74.3	 11.8 	0 	 11.8 	 246.0 
 7,000 	 14 	73.5	 11.8 	0 	 11.8 	 243.6 
 7,094 	 14 	74.2	 12.0 	0 	 11.8 	 241.2 
 7,156 	 15 	73.6	 11.8 	0 	 11.8 	 238.8 
 7,219 	 15 	74.2	 11.9 	0 	 11.8 	 237.6

Last edited by Jim in Tucson; Apr 20, 2010 at 06:08 AM.

Apr 17, 2010 | 10:28 PM

#19

tscompusa2

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fuel maps ussually tend up ending up something like this. this is a stock evo 8 turbo 9.8 on 100 pump that did about 360whp evom at 20psi i did with lean spool enabled.

lean spool on/off dont make a difference from what ive seen. some prefer it some dont. its off on my personal evo, but its easy to do on other peoples cars with it enabled.

but you see what is happening, the map is becoming leaned out at the spoolup area and then its being blocked down the line to control the a/f.. and it will always look flat on a v7 big map. of course every fuel map is going to differ per car tho, so you cant just copy someones fuel map.... you could blow your car up that way.

E85 isnt safe to tune mbt off a dyno because you can pass it without knock. so id recommend renting a dyno to tune your timing on e85 safely.

edit: title of the map says 27psi and timing2 because we were playing with higher boost, lol but the car was just not having it. we ended up staying at 20psi.
Im so used to big turbos, i figured 27 was nothing, then i realized how tiny a evo8 turbo is, and the guy was still on stock front mount so surely he was heatsoaking
it.

Last edited by tscompusa2; Apr 18, 2010 at 07:55 AM.

Apr 17, 2010 | 10:42 PM

#20

tscompusa2

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Quote:

Originally Posted by Jim in Tucson

Here is a log from earlier today. I think I have pretty much eradicated the last remnants of lean spool.

I'm open to comments and suggestions.

Code:

 RPM 	 TimAdv 	InjDuty	 W/B 	Knock	 AFR 	 1Bite 
 1,688 	 21 	6.8	 15.0 	0 	 13.6 	 102.0 
 1,719 	 22 	7.5	 14.4 	0 	 13.5 	 102.0 
 1,750 	 21 	7.6	 14.1 	0 	 13.3 	 104.4 
 1,781 	 21 	8.1	 13.7 	0 	 13.3 	 108.0 
 1,844 	 21 	8.7	 13.1 	0 	 13.2 	 110.4 
 1,875 	 21 	9.4	 12.6 	0 	 13.1 	 112.8 
 1,938 	 21 	9.5	 12.4 	0 	 13.0 	 116.4 
 1,969 	 23 	10.2	 12.1 	0 	 12.9 	 118.8 
 2,000 	 21 	10.4	 12.1 	0 	 12.8 	 121.2 
 2,031 	 20 	11.0	 12.1 	0 	 12.8 	 122.4 
 2,094 	 19 	11.6	 12.0 	0 	 12.7 	 126.0 
 2,125 	 19 	11.8	 12.0 	0 	 12.6 	 128.4 
 2,156 	 17 	12.4	 11.9 	0 	 12.5 	 132.0 
 2,188 	 16 	13.3	 11.8 	0 	 12.5 	 134.4 
 2,219 	 16 	13.4	 11.8 	0 	 12.5 	 139.2 
 2,281 	 14 	14.1	 11.9 	0 	 12.5 	 141.6 
 2,313 	 13 	14.8	 11.9 	0 	 12.5 	 146.4 
 2,344 	 11 	16.2	 11.8 	0 	 12.4 	 152.4 
 2,406 	 9 	17.7	 12.0 	0 	 12.3 	 157.2 
 2,438 	 8 	18.4	 12.0 	0 	 12.1 	 163.2 
 2,500 	 7 	20.0	 12.0 	0 	 11.8 	 171.6 
 2,531 	 6 	21.1	 11.7 	0 	 11.7 	 180.0 
 2,594 	 5 	22.7	 11.7 	0 	 11.5 	 190.8 
 2,625 	 4 	24.9	 11.4 	0 	 11.5 	 202.8 
 2,688 	 2 	26.7	 11.5 	0 	 11.5 	 214.8 
 2,750 	 1 	29.7	 11.5 	0 	 11.3 	 228.0 
 2,813 	 - 	32.4	 11.6 	0 	 11.2 	 243.6 
 2,875 	 - 	36.0	 11.6 	0 	 11.2 	 258.0 
 2,969 	 1 	38.8	 11.8 	0 	 11.2 	 259.2 
 3,063 	 1 	40.1	 11.9 	0 	 11.1 	 259.2 
 3,125 	 2 	40.6	 11.7 	0 	 11.1 	 259.2 
 3,281 	 2 	41.7	 12.3 	1 	 11.1 	 255.6 
 3,406 	 3 	43.3	 12.3 	0 	 11.1 	 258.0 
 3,438 	 3 	44.1	 12.4 	0 	 11.1 	 256.8 
 3,563 	 3 	44.8	 12.3 	0 	 11.1 	 260.4 
 3,625 	 4 	47.2	 12.3 	0 	 11.2 	 264.0 
 3,719 	 4 	48.0	 12.1 	0 	 11.2 	 266.4 
 3,813 	 4 	49.2	 11.9 	0 	 11.3 	 268.8 
 3,906 	 5 	50.4	 11.9 	0 	 11.3 	 268.8 
 3,969 	 5 	51.2	 11.8 	0 	 11.3 	 268.8 
 4,063 	 5 	52.8	 11.6 	0 	 11.3 	 270.0 
 4,156 	 5 	53.6	 11.6 	0 	 11.3 	 271.2 
 4,313 	 5 	56.0	 11.7 	0 	 11.3 	 272.4 
 4,469 	 6 	58.0	 11.7 	0 	 11.3 	 273.6 
 4,594 	 6 	59.6	 11.7 	0 	 11.3 	 277.2 
 4,750 	 6 	62.2	 11.7 	0 	 11.3 	 279.6 
 4,875 	 7 	63.8	 11.8 	0 	 11.4 	 284.4 
 4,969 	 6 	64.4	 11.7 	0 	 11.3 	 289.2 
 5,125 	 7 	66.0	 11.6 	0 	 11.4 	 290.4 
 5,250 	 8 	68.3	 11.8 	0 	 11.4 	 292.8 
 5,313 	 8 	69.9	 11.8 	0 	 11.4 	 291.6 
 5,406 	 9 	70.8	 11.8 	0 	 11.5 	 291.6 
 5,500 	 9 	70.8	 11.8 	0 	 11.5 	 291.6 
 5,531 	 9 	71.6	 11.8 	0 	 11.5 	 290.4 
 5,656 	 10 	71.6	 11.8 	0 	 11.5 	 288.0 
 5,719 	 10 	72.8	 12.0 	0 	 11.5 	 286.8 
 5,844 	 10 	72.7	 12.0 	0 	 11.5 	 284.4 
 5,906 	 11 	72.6	 11.9 	0 	 11.7 	 280.8 
 6,000 	 11 	73.3	 12.0 	0 	 11.6 	 278.4 
 6,094 	 11 	73.5	 12.0 	0 	 11.6 	 274.8 
 6,188 	 11 	74.3	 12.1 	0 	 11.6 	 272.4 
 6,250 	 12 	74.1	 11.9 	0 	 11.6 	 268.8 
 6,344 	 12 	73.8	 11.9 	0 	 11.6 	 266.4 
 6,438 	 12 	74.5	 12.0 	0 	 11.7 	 264.0 
 6,500 	 13 	73.8	 11.9 	0 	 11.7 	 260.4 
 6,594 	 13 	74.6	 11.9 	0 	 11.7 	 258.0 
 6,656 	 13 	74.2	 11.9 	0 	 11.7 	 255.6 
 6,719 	 13 	75.2	 11.8 	0 	 11.7 	 250.8 
 6,875 	 14 	74.8	 12.0 	0 	 11.7 	 248.4 
 6,938 	 14 	74.3	 11.8 	0 	 11.8 	 246.0 
 7,000 	 14 	73.5	 11.8 	0 	 11.8 	 243.6 
 7,094 	 14 	74.2	 12.0 	0 	 11.8 	 241.2 
 7,156 	 15 	73.6	 11.8 	0 	 11.8 	 238.8 
 7,219 	 15 	74.2	 11.9 	0 	 11.8 	 237.6

your max load isnt being achieved until over 5000rpm, that is not ok.
your spoolup needs lots of work or you have a boost leak.
on my fp black and 2.3 i see peak load by 3800rpm on a much bigger turbo

Last edited by tscompusa2; Apr 17, 2010 at 10:50 PM.

Apr 18, 2010 | 06:23 AM

#21

Jim in Tucson

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^^^^^^^^^
The boost was at 20psi. It spools up at approx 2,800 rpm. Stays reasonably flat to redline. I'm pretty sure there is no boost leak.

Last edited by Jim in Tucson; Apr 18, 2010 at 06:25 AM.

Apr 18, 2010 | 06:33 AM

#22

tscompusa2

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its not starting to spool until 2800? if you try saying you hit full boost at 2800 its not possible.... especially not with a evo 9 turbo, a 14b cant even achieve that. set your a/f to 12.8 during spool for fastest spool on e85.. also either your logger is laggy or you have a older version of evoscan or something, but you should see on your log a peak LOAD number right after the turbo is fully spooled, and in your case should be about 3500 territory.

Apr 18, 2010 | 07:36 AM

#23

Jim in Tucson

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Quote:

Originally Posted by tscompusa

EvoScan is v2.7 Beta5.

Boost is actually set at 19psi. It creeps to about 21psi and back to 19psi at redline. I just call it 20 'cause I'm too lazy to type all the above.

Yes, as near as I can eye-ball it, I'm hitting 19psi at approx. 2,800 RPM. This is by eye-ball of boost gauge and in-car tach, so margin for error is prolly 5% at least. If I don't have my glasses on, margin for error is +10%.

I may need to lean out spool up, I'm not sure. I come from a turbo background, but not DSM. I had never heard of lean spool up till I got on Evom. I had always been taught to enrich the spool up. I have searched for dyno data on these boards showing that lean spool does in fact improve spool, but I've not found it. If it really is fact, it should not be that difficult to find the documentation.

Apr 18, 2010 | 07:47 AM

#24

tscompusa2

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if you have rich afr with e85 at spoolup the car will feel like a 1.8L trying to spool a t67 lol. it will make a air noise and not do ****.

tune your spool for 12.8. if you have an aftermarket map sensor u can log with, stop your lean spool tuning at approx 10-12psi.

lots of timing and lean afr will give max spool. - the timing thing changes based on what tuner you speak to, but i believe in more timing myself.

and 11.8 a/f throughout the rest is safe

the only reason i suggest you have a boost leak is because there is no max load in your log at all near the peak tq area of that turbo which is typically about 4000 id say. its way higher like 5000+ which is odd.

either that or you may be logging to many things in evoscan and slowing it down.

Apr 18, 2010 | 11:28 AM

#25

Jim in Tucson

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Quote:

Originally Posted by tscompusa

the only reason i suggest you have a boost leak is because there is no max load in your log at all near the peak tq area of that turbo which is typically about 4000 id say. its way higher like 5000+ which is odd.

I agree that is odd. I can't explain it...yet.

Speaking of odd, I have never seen a fuel map like the one you posted above. I think I understand what it is supposed to accomplish, with the extreme lean spool and then a sudden 21% increase in fuel from 3,000 to 3,250. Does that much change between adjacent cells feel smooth at WOT?

Apr 18, 2010 | 05:02 PM

#26

tscompusa2

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its a fuel map not a timing map. its not going to change how smooth the car runs, but no you wont feel it. that map gives the vehicle solid a/f from spool to redline. that is all that matters with the fuel map. this particular car only sees up to 230~ load

Apr 19, 2010 | 08:18 PM

#27

Jim in Tucson

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To further the lean spool correction, I'm enleaning the spool up area of the fuel map. To point me in the right direction I inserted a target column in the log along with plus and minus variance columns to help me zero in on the subject. It is showing me where to pull fuel by flagging anything greater than 5% variance.

Do these AFR targets look good? Bad? Just OK? Suggestions?

Code:

 RPM 	 W/Band 	 Target 	 MAP+ 	 MAP- 	 MAPafr 	 1Bite 
 1,688 	 15.0 				 13.6 	 102.0 
 1,719 	 14.4 				 13.5 	 102.0 
 1,750 	 14.1 				 13.3 	 104.4 
 1,781 	 13.7 				 13.3 	 108.0 
 1,844 	 13.1 	 13.0 			 13.2 	 110.4 
 1,875 	 12.6 	 13.0 			 13.1 	 112.8 
 1,938 	 12.4 	 13.0 			 13.0 	 116.4 
 1,969 	 12.1 	 13.0 	7%		 12.9 	 118.8 
 2,000 	 12.1 	 13.0 	7%		 12.8 	 121.2 
 2,031 	 12.1 	 13.0 	7%		 12.8 	 122.4 
 2,094 	 12.0 	 13.0 	8%		 12.7 	 126.0 
 2,125 	 12.0 	 13.0 	8%		 12.6 	 128.4 
 2,156 	 11.9 	 13.0 	9%		 12.5 	 132.0 
 2,188 	 11.8 	 13.0 	10%		 12.5 	 134.4 
 2,219 	 11.8 	 13.0 	10%		 12.5 	 139.2 
 2,281 	 11.9 	 13.0 	9%		 12.5 	 141.6 
 2,313 	 11.9 	 13.0 	9%		 12.5 	 146.4 
 2,344 	 11.8 	 13.0 	10%		 12.4 	 152.4 
 2,406 	 12.0 	 13.0 	8%		 12.3 	 157.2 
 2,438 	 12.0 	 13.0 	8%		 12.1 	 163.2 
 2,500 	 12.0 	 12.5 			 11.8 	 171.6 
 2,531 	 11.7 	 12.5 	7%		 11.7 	 180.0 
 2,594 	 11.7 	 12.5 	7%		 11.5 	 190.8 
 2,625 	 11.4 	 12.5 	10%		 11.5 	 202.8 
 2,688 	 11.5 	 12.5 	9%		 11.5 	 214.8 
 2,750 	 11.5 	 12.5 	9%		 11.3 	 228.0 
 2,813 	 11.6 	 12.5 	8%		 11.2 	 243.6 
 2,875 	 11.6 	 12.5 	8%		 11.2 	 258.0 
 2,969 	 11.8 	 12.5 	6%		 11.2 	 259.2 
 3,063 	 11.9 	 12.5 	5%		 11.1 	 259.2 
 3,125 	 11.7 	 12.5 	7%		 11.1 	 259.2 
 3,281 	 12.3 	 12.5 			 11.1 	 255.6 
 3,406 	 12.3 	 12.5 			 11.1 	 258.0 
 3,438 	 12.4 	 12.5 			 11.1 	 256.8 
 3,563 	 12.3 	 12.0 			 11.1 	 260.4 
 3,625 	 12.3 	 12.0 			 11.2 	 264.0 
 3,719 	 12.1 	 12.0 			 11.2 	 266.4 
 3,813 	 11.9 	 12.0 			 11.3 	 268.8 
 3,906 	 11.9 	 12.0 			 11.3 	 268.8 
 3,969 	 11.8 	 12.0 			 11.3 	 268.8 
 4,063 	 11.6 	 12.0 			 11.3 	 270.0 
 4,156 	 11.6 	 12.0 			 11.3 	 271.2 
 4,313 	 11.7 	 12.0 			 11.3 	 272.4 
 4,469 	 11.7 	 12.0 			 11.3 	 273.6 
 4,594 	 11.7 	 12.0 			 11.3 	 277.2 
 4,750 	 11.7 	 12.0 			 11.3 	 279.6 
 4,875 	 11.8 	 12.0 			 11.4 	 284.4 
 4,969 	 11.7 	 12.0 			 11.3 	 289.2 
 5,125 	 11.6 	 12.0 			 11.4 	 290.4 
 5,250 	 11.8 	 12.0 			 11.4 	 292.8 
 5,313 	 11.8 	 12.0 			 11.4 	 291.6 
 5,406 	 11.8 	 12.0 			 11.5 	 291.6 
 5,500 	 11.8 	 12.0 			 11.5 	 291.6 
 5,531 	 11.8 	 12.0 			 11.5 	 290.4 
 5,656 	 11.8 	 12.0 			 11.5 	 288.0 
 5,719 	 12.0 	 12.0 			 11.5 	 286.8 
 5,844 	 12.0 	 12.0 			 11.5 	 284.4 
 5,906 	 11.9 	 12.0 			 11.7 	 280.8 
 6,000 	 12.0 	 12.0 			 11.6 	 278.4 
 6,094 	 12.0 	 12.0 			 11.6 	 274.8 
 6,188 	 12.1 	 12.0 			 11.6 	 272.4 
 6,250 	 11.9 	 12.0 			 11.6 	 268.8 
 6,344 	 11.9 	 12.0 			 11.6 	 266.4 
 6,438 	 12.0 	 12.0 			 11.7 	 264.0 
 6,500 	 11.9 	 12.0 			 11.7 	 260.4 
 6,594 	 11.9 	 12.0 			 11.7 	 258.0 
 6,656 	 11.9 	 12.0 			 11.7 	 255.6 
 6,719 	 11.8 	 12.0 			 11.7 	 250.8 
 6,875 	 12.0 	 12.0 			 11.7 	 248.4 
 6,938 	 11.8 	 12.0 			 11.8 	 246.0 
 7,000 	 11.8 	 12.0 			 11.8 	 243.6 
 7,094 	 12.0 	 12.0 			 11.8 	 241.2 
 7,156 	 11.8 	 12.0 			 11.8 	 238.8 
 7,219 	 11.9 	 12.0 			 11.8 	 237.6

Last edited by Jim in Tucson; Apr 20, 2010 at 06:04 AM.

Apr 19, 2010 | 08:23 PM

#28

tscompusa2

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From: pa

overall target a/f 11.8-12 is good for e85 . just lean the spoolup for 12.8 and you should be good to go with the fuel map. the timing map is another story. you can blow your motor with e85 by passing mbt without even knocking so be careful.

Apr 19, 2010 | 09:03 PM

#29

oldevodude

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Jim,

Only thing I wanted to say is that from 3kto6k on your log you are low 11's AFR . as other have stated target 11.8 to 12.2 measured. Even going from 11.5 to 12 removed some 1-3 counts of knock I was having way back when.

Mr. fred has documented this as well FWIW.

PS I would make small changes incrementally so you can see the affects the changes have and not get any more overwhelmed in the process