Dyno estimates...

gt347mustang said:

Something else changed too. A plug change isn't going to gain that much mph.

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I was thinking the same, in my experience if the plug fires it makes power, if not you have other symptoms and issues.

I have checked the plugs on the old setup which was similar to this and the line in the ground strap was near the bend as it’s supposed to be on E85.


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gt347mustang said:

Something else changed too. A plug change isn't going to gain that much mph.

Click to expand...

Nothing else changed, period! The only thing I could have figured is the I was blowing out spark at the top end....I have "plenty" of time slips, with the TR-6's I was picking up 22 to 26 mph in the back-half, BR7EF's picked up a solid 4 mph (with a headwind)!

timspony said:

Nothing else changed, period! The only thing I could have figured is the I was blowing out spark at the top end....I have "plenty" of time slips, with the TR-6's I was picking up 22 to 26 mph in the back-half, BR7EF's picked up a solid 4 mph (with a headwind)!

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Glad you figured that out. My ported eaton picked up 27mph in the back half with TR6's, first time ever out at the track

timspony said:

Nothing else changed, period! The only thing I could have figured is the I was blowing out spark at the top end....I have "plenty" of time slips, with the TR-6's I was picking up 22 to 26 mph in the back-half, BR7EF's a solid 4 mph (with a headwind)!

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I know one thing, for the cost of a set of spark plugs it’s worth me trying it out!


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I ran br7’s on e85 and it ran great. 22psi.


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Subn for results!

Well I had my car dyno’d today. Of course my IAT2 decided to take a shit so the computer defaulted to 120 as the temp so timing was held to about 21 degrees. Car was a little rich (we left previous tune due to issues) as it dropped to around 11 over 5500. Tried swapping to a 3.25 pulley to increase boost to 22-23 but the damn belt was too long and slipped. Due to issues I decided to just leave the current tune which runs and drives great. In any case, even with all aforementioned issues car made 685/643, so once I get some things ironed out I’ll be heading back.


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Weather Man said:

680

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Well there’s more left in her but you win closest to without going over lol


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Great start!! Good luck when you head back!

What's with that afr? It's all over the place and you're not getting under 12.0 until after 5300rpm.

blownstang4.6 said:

What's with that afr? You're not getting under 12.0 until 5300rpm.

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Not sure but Lidio said the fuel curve was good, tiny bit fat toward the end at around 11, but he said bringing back to 11.5-12 range wouldn’t give enough power to warrant the cost of a retune.

I think he aims to get the AF around 12 or just under.


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jony51999 said:

Not sure but Lidio said the fuel curve was good, tiny bit fat toward the end at around 11, but he said bringing back to 11.5-12 range wouldn’t give enough power to warrant the cost of a retune.

I think he aims to get the AF around 12 or just under.


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It should be a solid line throughout. If he's shooting for 12.0 then I'd expect it to run within a few points of that through the entire pull. Your at mid to high 12's and then fall to low 11's. Huge swings. I'd be very concerned with that entire rpm range that is above 12.0.

blownstang4.6 said:

It should be a solid line throughout. If he's shooting for 12.0 then I'd expect it to run within a few points of that through the entire pull. Your at mid to high 12's and then fall to low 11's. Huge swings. I'd be very concerned with that entire rpm range that is above 12.0.

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This was with the tune that was in the car and he told me since it runs, starts and drives great it’s not worth the cost of a custom retune. He said maybe 5 or so HP to get the AF back to 12 the whole way. But, since I’m also planning on putting a smaller pulley to run 22-23psi, so he said with the AF like it is I’ll be good to do that.

Being that he’s been tuning/building mustangs since ‘92 and was one of the first adopters of E85 on blown cars around here along with having a stellar reputation, I was ok taking his word for it.



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blownstang4.6 said:

It should be a solid line throughout. If he's shooting for 12.0 then I'd expect it to run within a few points of that through the entire pull. Your at mid to high 12's and then fall to low 11's. Huge swings. I'd be very concerned with that entire rpm range that is above 12.0.

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I think with E85 the target A/F is a little different than pump gas.

whitedevil95 said:

I think with E85 the target A/F is a little different than pump gas.

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I don't think so. You make the stoich adjustment in the tune an boost cars should still be tuned to 11.8. You have a little more safety margin with E85 so can lean it out a bit more, but 12.7afr in the midrange is way lean. If he adds more boost that will just get leaner on the same tune. Mine is a solid 11.4-11.8 on 93 and E85.

You will not detonate at gas scale 12.7 afr on E85. Not even close, the safety margin on ethanol is massive. But having said that....I do agree, I'd not be happy with that curve. I'd pay to get it smoothed out personally. Flat 11.8

c6zhombre said:

You will not detonate at gas scale 12.7 afr on E85. Not even close, the safety margin on ethanol is massive. But having said that....I do agree, I'd not be happy with that curve. I'd pay to get it smoothed out personally. Flat 11.8

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Yeah I just emailed him to inquire. Appreciate the feedback fellas.


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whitedevil95 said:

I think with E85 the target A/F is a little different than pump gas.

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The stoichiometric ratio of E85 is different from gasoline but you still shoot for the same lambda.

--Joe

Soap said:

The stoichiometric ratio of E85 is different from gasoline but you still shoot for the same lambda.

--Joe

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Joe your from around here and know or know of Lidio I’m sure, you agree it’s worth a retune even if he said he’s fine with it as is?


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Yes I'm familiar, Lid tuned my car when I had my ported Eaton setup. I'm not going to question his recommendation, he has forgot more about tuning than I'll ever know.

If you plan to run this setup next year then I'd get it retuned. As others have said, your AF should be a pretty flat line. With the kind of power you are making I'd want to be around 11.5 AF, you're quite a bit leaner for most of the pull. It's not a matter of making more or less power, it's about keeping the engine in one piece.

--Joe