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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Aug-23-2018, 10:30:04 PM   #91
LemansM
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Default Re: Review of B spec tune + E85 (335 whp and 265 wheel torque - dyno charts included)

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Originally Posted by Dr M3an M3 View Post
Would be curious to see the gains on a full NA Build (CSL airbox, cams, stepped headers, 2.5in exhaust, custom tune).
I'll be posting my results shortly. If you can shoot me one of those SS 2.5in section 2's it would make it even sweeter
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Old Fri, Aug-24-2018, 07:23:15 PM   #92
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Default Re: Review of B spec tune + E85 (335 whp and 265 wheel torque - dyno charts included)

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I'll be posting my results shortly. If you can shoot me one of those SS 2.5in section 2's it would make it even sweeter
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Old Fri, Aug-24-2018, 07:30:08 PM   #93
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Default Re: Review of B spec tune + E85 (335 whp and 265 wheel torque - dyno charts included)

So not being savvy with E85, I decided to do a little more research on it. Are you all experiencing a decrease in fuel economy running on E85?

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Looked at another way, a tank of E85 ethanol will take you only about 80 percent as far as you could drive on a tank of gasoline. On E85 ethanol, you'll stop more to refuel, have to plan ahead to make sure the station carries E85 ethanol, and perhaps pay more per gallon once you get there.

The difference in miles per gallon between gasoline and E85 ethanol has to do with E85 ethanol's lower energy content per unit of volume. Measured in British Thermal Units (BTUs), a gallon of E85 ethanol has only 72 percent of the energy in a gallon of gasoline.
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Old Fri, Aug-24-2018, 08:09:48 PM   #94
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Default Re: Review of B spec tune + E85 (335 whp and 265 wheel torque - dyno charts included)

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So not being savvy with E85, I decided to do a little more research on it. Are you all experiencing a decrease in fuel economy running on E85?
Yes, decrease in mpg is about 10%, however $ savings are more like 25% since e85 is ~$2.89/gallon while 91 is clocking in close/over $4/gallon.

I will note an important difference. Huge difference between getting an e85 specific tune from a tuner (where it is statically tuned for a specific ratio of e85/91 and actual ethanol content to run properly/consistently) vs getting the AFD kit (which dynamically adjusts based on proportion of e85/ethanol in your tank via a sensor). With AFD kit you don't have to plan to refill with e85 at specific gas stations all the time, that is the beauty of it, you can throw in e85 or 91 whenever. With a static tune from tuner, definitely not the case, you have to try to keep an approx consistent proportion of ethanol (which gas station to gas station differs in actual ethanol content, so good luck).

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Last edited by mrgizmo04; Fri, Aug-24-2018 at 08:14:24 PM.
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Old Fri, Aug-24-2018, 08:10:43 PM   #95
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Default Re: Review of B spec tune + E85 (335 whp and 265 wheel torque - dyno charts included)

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Originally Posted by bimmerfan08 View Post
So not being savvy with E85, I decided to do a little more research on it. Are you all experiencing a decrease in fuel economy running on E85?
I think its given that you get less miles from e85 as you burn more of it compared to regular pump gas. but it is evened out by its lower price so overall you're not really spending more and sometimes some gas station do e85 days where its 85cents/gallon (at least in San diego they do).

The benefit of better power and running cooler is a good trade off as well I guess.
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Old Fri, Aug-24-2018, 08:11:23 PM   #96
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Default Re: Review of B spec tune + E85 (335 whp and 265 wheel torque - dyno charts included)

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So not being savvy with E85, I decided to do a little more research on it. Are you all experiencing a decrease in fuel economy running on E85?


There is a significant decrease in fuel economy and I’ve been getting 17-19 mpg which is fine since ethanol is $1 per gallon cheaper.

If you’re getting ethanol kit for fuel economy you’d be a little disappointed.
Power gains is the single reason I got it

I have put 3000 miles since install and no issues whatsoever


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Old Fri, Aug-24-2018, 10:42:36 PM   #97
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Default Re: Review of B spec tune + E85 (335 whp and 265 wheel torque - dyno charts included)

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Originally Posted by LemansM View Post
I'll be posting my results shortly. If you can shoot me one of those SS 2.5in section 2's it would make it even sweeter
Happy to order one for you! Just waiting for Supersprint to return from their summer vacation on Monday. Feel free to send me a PM and we can make it happen!
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Old Sat, Aug-25-2018, 03:40:07 PM   #98
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Default Re: Review of B spec tune + E85 (335 whp and 265 wheel torque - dyno charts included)

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Originally Posted by Dr M3an M3 View Post
Happy to order one for you! Just waiting for Supersprint to return from their summer vacation on Monday. Feel free to send me a PM and we can make it happen!
Great! PM incoming.
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Discussing Review of B spec tune + E85 (335 whp and 265 wheel torque - dyno charts included) in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)