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Old 06-05-2018, 04:31 PM   #16
Fishmasterdan
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Default Re: Your afr with e85

Thanks for the input. I need it. I am learning.
I think I under stand. Too hot of a plug. Back down to 8's (good I have tons of them). Pull 1 degree (that puts my at 26 WOT) and lean it out a tad to 12.6.
Test it. Check for a little color. Does this sound correct?
I do check weather every run these were runs were close 600 800 and 1000 DA dont have my log book in front of me but close enough.

I put a Mighty mouse catch can on and it really cleaned up the plugs. I had a crappy catch can on it before and the plugs would get a little color on them. Now I can tell it was oil on the plugs and not fuel. Reading plugs tell alot of whats going on.
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Old 06-05-2018, 10:37 PM   #17
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Default Re: Your afr with e85

Yes^^^ that's what I would try next.
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69 chevelle.637 pump gas 91/e15 ..
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Old 06-19-2018, 09:06 AM   #18
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Default Re: Your afr with e85

Back with an update.
Made a pass -8 projected plugs 12.4 afr 26 degrees. Didnt look like there was any heat in the plugs. Added 2 degrees made another pass. Still doesnt look like any heat in the plugs. MPH was down 3. I am thinking I need to run -7 12.2 at 28 degrees.




Last edited by Fishmasterdan; 06-19-2018 at 09:08 AM.
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Old 06-19-2018, 09:09 AM   #19
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Default Re: Your afr with e85

And a -6 projected for a reference.
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Old 06-19-2018, 11:11 PM   #20
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Default Re: Your afr with e85

are you guys reading lambda 1 as 14.63 or 9.80 (stoich for e85)
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Old 06-19-2018, 11:46 PM   #21
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Default Re: Your afr with e85

I just run gas scale.It seems people I race with all understand that easier.
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72 Chevelle 618bbc dart 20 heads and profiler t ram with enderle hat with efi.
3065lbs-8.12-166.32 e15 fuel
Nitrous plate we made under hat.102 nitrous 93 e85 @5.5 lbs &900 nitrous pressure.
[email protected]

69 chevelle.637 pump gas 91/e15 ..
Brodix2005 spread port heads.
3150 lbs. New for 18
7.96-169.67

Sons 69 Chevy truck.
369 LS -f1r charger e85
3 speed trans .4.71 gears
[email protected] 3985 lbs w driver.
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Old 06-19-2018, 11:49 PM   #22
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Default Re: Your afr with e85

Quote:
Originally Posted by Fishmasterdan View Post
Back with an update.
Made a pass -8 projected plugs 12.4 afr 26 degrees. Didnt look like there was any heat in the plugs. Added 2 degrees made another pass. Still doesnt look like any heat in the plugs. MPH was down 3. I am thinking I need to run -7 12.2 at 28 degrees.



That's all you can do is see what yours likes.You keeping good track of weather conds to know if you gain or lose on different days?Corr factor,wgs etc?
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Our junk

72 Chevelle 618bbc dart 20 heads and profiler t ram with enderle hat with efi.
3065lbs-8.12-166.32 e15 fuel
Nitrous plate we made under hat.102 nitrous 93 e85 @5.5 lbs &900 nitrous pressure.
[email protected]

69 chevelle.637 pump gas 91/e15 ..
Brodix2005 spread port heads.
3150 lbs. New for 18
7.96-169.67

Sons 69 Chevy truck.
369 LS -f1r charger e85
3 speed trans .4.71 gears
[email protected] 3985 lbs w driver.

Last edited by 1963 corvette; 06-19-2018 at 11:52 PM.
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Old 06-20-2018, 09:18 AM   #23
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Default Re: Your afr with e85

I do keep good record. It seems to not matter that much. DA swings 600 to 2300 so far. All MPH stays pretty consistant. And I dont see much change in plugs from 600 to 2300 DA. I do know the header are cooler after a pass on the 8 plugs.
Not sure if you should crank the timing up on colder plugs or run more reasonable timing with hotter plugs??
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Old 06-20-2018, 11:11 AM   #24
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Default Re: Your afr with e85

What type of pistons? Flat, Dome, Dish? Carb or EFI?

I would stay with the -7 non projected.

The newest picture the heat mark looks to cold. So either needs more timing with the 8 plug or 7 plug with same timing.
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Old 06-20-2018, 01:22 PM   #25
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Default Re: Your afr with e85

Quote:
Originally Posted by Fishmasterdan View Post
I do keep good record. It seems to not matter that much. DA swings 600 to 2300 so far. All MPH stays pretty consistant. And I dont see much change in plugs from 600 to 2300 DA. I do know the header are cooler after a pass on the 8 plugs.
Not sure if you should crank the timing up on colder plugs or run more reasonable timing with hotter plugs??
Colder plug will tolerate more timing ,your plug mark was showing that.Im sure that's why you slowed down.Again all combo related and needs tried.Pic you show of hot plug is on edge of disaster.Look at that timing mark.E85 doesn't detonate easy but will pre ignite easy.Thats why I don't want a hot glow plug laying in there.I always run coldest plug that doesn't foul.If something else goes wrong it mite survive.You flutter rings and oil gets in comb area you don't want hot plugs laying in there.I rather change a few plugs not pistons.
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Our junk

72 Chevelle 618bbc dart 20 heads and profiler t ram with enderle hat with efi.
3065lbs-8.12-166.32 e15 fuel
Nitrous plate we made under hat.102 nitrous 93 e85 @5.5 lbs &900 nitrous pressure.
[email protected]

69 chevelle.637 pump gas 91/e15 ..
Brodix2005 spread port heads.
3150 lbs. New for 18
7.96-169.67

Sons 69 Chevy truck.
369 LS -f1r charger e85
3 speed trans .4.71 gears
[email protected] 3985 lbs w driver.

Last edited by 1963 corvette; 06-20-2018 at 01:24 PM.
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Old 06-20-2018, 01:27 PM   #26
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Default Re: Your afr with e85

Plug marking and color is combo of correct plug and right fuel and timing.Any one of those wrong and power falls.
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Our junk

72 Chevelle 618bbc dart 20 heads and profiler t ram with enderle hat with efi.
3065lbs-8.12-166.32 e15 fuel
Nitrous plate we made under hat.102 nitrous 93 e85 @5.5 lbs &900 nitrous pressure.
[email protected]

69 chevelle.637 pump gas 91/e15 ..
Brodix2005 spread port heads.
3150 lbs. New for 18
7.96-169.67

Sons 69 Chevy truck.
369 LS -f1r charger e85
3 speed trans .4.71 gears
[email protected] 3985 lbs w driver.
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Old 06-20-2018, 03:28 PM   #27
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Default Re: Your afr with e85

Quote:
Originally Posted by 1963 corvette View Post
Plug marking and color is combo of correct plug and right fuel and timing.Any one of those wrong and power falls.

I am starting to see the light. Correct me if I am wrong.
You suggest adding some timing here and keep the colder plugs in. Less prone to denotation.

For fuel I think I need to add a little fuel. The plugs have NO fuel indication on them. The porcelain looks brand new. I will cut a few and double check.

I realize this is pretty much splitting hairs on a low HP motor but it sure is educating me on E85 plug reading.
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Old 06-20-2018, 03:31 PM   #28
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Default Re: Your afr with e85

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Originally Posted by awake1630 View Post
What type of pistons? Flat, Dome, Dish? Carb or EFI?

I would stay with the -7 non projected.

The newest picture the heat mark looks to cold. So either needs more timing with the 8 plug or 7 plug with same timing.
EFI,+6 dome.

The question is what is safer? hotter plugs lower timing, or colder plugs more timing.
One thing thats obvious to me is plugs make a huge difference with E85, like 4 degrees worth of timing per heat range.
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Old 06-20-2018, 04:23 PM   #29
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Default Re: Your afr with e85

We are at 26* and 12.0 on the gas scale, BR7EF (-7 heat range) plug, gapped to .026. ~13:1 LS3 (unported head), EFI, E85. We have tried TR6s, and settled on the colder plug. Made a bit more power on the dyno at 12.3 AFR but at the hillclimbs it leans out a bit under load so we left it there. Picked up about 8hp going from 12.8 AFR to 12.3, fatter than that it didn't lose more than 1hp down to 12.0. Tried timing in 1 degree increments from 25-30, similar power from 26-30 so we left it at 26. If it was a drag car we would get more aggressive with it.

Last edited by Mark Aubele; 06-20-2018 at 04:25 PM.
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Old 06-20-2018, 05:39 PM   #30
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Default Re: Your afr with e85

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Originally Posted by Mark Aubele View Post
We are at 26* and 12.0 on the gas scale, BR7EF (-7 heat range) plug, gapped to .026. ~13:1 LS3 (unported head), EFI, E85. We have tried TR6s, and settled on the colder plug. Made a bit more power on the dyno at 12.3 AFR but at the hillclimbs it leans out a bit under load so we left it there. Picked up about 8hp going from 12.8 AFR to 12.3, fatter than that it didn't lose more than 1hp down to 12.0. Tried timing in 1 degree increments from 25-30, similar power from 26-30 so we left it at 26. If it was a drag car we would get more aggressive with it.
Thanks a bunch for your input.
I think that is the exact tune I think I am settling on. 12.3 12.2 afr. -7 plugs. 26 to 28 degrees. I wish I had a Dyno close by.
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