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Timing with e85

r1lovin

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What are you guys running for timing on e85? And a stupid question but on my ngauge datalogs is total timing just listed as spark?
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dubster99

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It is listed as spark. Timing will be dependent on the quality of E85, and your boost level...among other things. At 10ish psi, I run about 22* on E50, and at redline it's 21ish.
 
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r1lovin

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On e70 im only getting 17* or 18*. And knock is still showing - 2* seems very low on the timing. Pretty sure i was getting 17* on pump gas.
 

15GTPP

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-2 is good. It means it's still adding 2 degrees so your at 19*. Just as long as it's not positive.
 

whatsup62

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ON good E85 I am seeing 23.5 in the 4500-5500 rpm range with a -4.2 knock. 5500-7500 I am at 22.5 with a -4.998 knock.
 

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On e70 im only getting 17* or 18*. And knock is still showing - 2* seems very low on the timing. Pretty sure i was getting 17* on pump gas.
Make sure your looking at saft. Spark advance final total. Not just spark advance cylinder one. Saft includes knock sensor corrections.
 
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r1lovin

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Make sure your looking at saft. Spark advance final total. Not just spark advance cylinder one. Saft includes knock sensor corrections.
Ill take a look. Thanks
 

olaosunt

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Here is a log of my KB car.
E85 tested at E85.
20 psi of boost per gauge.It made 955 rwhp on the dyno but boost read higher.

24*
Knock is -6.5








Never got to make a pass at this power level and try for that 9 second pass with the MT 82 but block did not cooperate.:mad:- crack in valley
waiting to swap in sleeved 5.2,upgrade cams.springs in GT 350 heads and try with the Tremec that will be swapped at the same time.
 
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dubster99

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Damn thats a shitload of timing for that boost. I like it!
 

olaosunt

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I liked it too!!
... till my blocked cracked!!
Lund sr saw log once(went to the wrong Lund) and was not thrilled either .lol

Jr said as long as I knew the risks.lol

I was good as was not seeing knock.
 

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dubster99

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From what I have heard from a few tuners, on E85 you won't see much knock until it goes boom.
 

olaosunt

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Boom as in detonation?
Dont think related to block failure.
Pistons all look great.

for some reason photo bucket is not allowing to post the pics of knock log.
It was -6.5 from peak timing.
 

dubster99

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Yes as in detonation. Not sure if that's correct or not, just what I've heard from a few. Once it knocks on E85, it's too late.
 

beefcake

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24 :)

built engine!
 

olaosunt

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Lol
Yes ,non sleeved .
This was the block that cracked in the valley:mad:
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