Well...they have cars running around on it, while no one else does. They must be doing something right.

 

your expert explanation sure didn't save Mike's or your reputation on this one

thanks for proving you don't understand how your equipment works....

 

the point is : They don't understand how their wideband works

you may not understand this but Ryphile does

 

Ok smart guy, what's the pump current level at 0.76 lambda? How about at 2.50 lambda? How does the PWM heater circuit knows when the sensor is at operating temperature? What is the operating PWM Frequency for a Bosch LSU4 sensor or NTK sensor's heater? What's the conversion in converting gasoline AFR to Methanol AFR?

Always trying to start something.... geez!

 

You are a smart man Ryan . Great questions.

Looking forward to Mikes answer.

Longboard

 

Looking foward to RMW's answer

 

Looking forward to E85 in my tank

 

Ryan, I'm sure you will understand my explanation, it's just unfortunate we spend more time filtering thru ignorant comments than educating the community. Experienced tuners like Jason and myself, understand the chemistry of combustion and stoichiometric amounts of air and fuel as it relates to Lambda. For gasoline, the stoich AFR value is 14.7:1 which is Lambda 1.0. Understanding how this concept relates clearly defines ones experience or lack of in proper engine tuning. Stoich AFR for E85 is approximately 9.8:1 and you have accurately mentioned that peak torque is produced around 0.82 Lambda. I'm sure you will agree that 0.82 Lambda is equivalent to 12.05 AFR for gasoline. Mike mentioned the MYNES MINI is tuned to 11.9-12.1 AFR running on E85. The wideband on their dyno is calibrated for gasoline AFR. Comparing the equivalent ratios and converting those values to Lambda results in 0.81-0.82 on E85, exactly the number you so stated. The reason their MINI makes horsepower and torque is because it is properly tuned.

Hope this helps clearify things....

 

Glad to see at LEAST ONE PERSON OVER THERE KNOWS HOW TO READ A WIDEBAND CORRECTLY

I think I'm going to call you the "sweeper" as you always have to come in clean up the mess that Mike and Jay get into....

 

Steering this back to the OP's original question...

I have an '05 MCS and my MPG prior to just the 15% pulley, was in the 25-27 range mostly city driving. With all the mods in my sig, I'm averaging the same although I've dropped to 10mpg when I run at Pacific Raceways. Long highway drives, I get around 30-31 mpg.

The pulley is your best bang for the buck. If you look at cost/performance gain, an intake or exhaust will not give you good returns. I am running the stock airbox and paper filter along with the OEM catback. The addition of the RMW header really woke up the car. I'd spend my money there next. Then a custom ECU tune will really make your car fly!

As far as shops in the Seattle area, I've heard good things about Zahntech in Redmond, Speedware Motorsports in Redmond and have had good experience with Group 2 Motorsports in Ballard. You can also post on psmini.org for other recommendations.

Good luck!

 

Me too haha

 

Thanks Hubie, I had a feeling this was the case. My concern was AFR is an absolute ratio [like making an adult beverage, 1 part fuel and 9 parts air], not a relativism like he was presenting it as [as a conversion of measured Lambda]. Perhaps it would've been better to offer the actual Lambda measurement instead of making himself look bad by quoting the wrong representative AFR.

I think the vendor bashing needs to quiet down. Perhaps some of them can offer way to help the original post....and remember E85 is not a good solution for maintaining fuel economy while increasing power.

Regards,
Ryan

 

still want teh E85 conversion!!! lucky Brunei still pumps it in abundance..cheap too...

 

10% power gain for 40% loss in economy, hardly makes sense to these pragmatic eyes.

 

Lastest tank of E85: 234 miles (all city driving)

mods: 06 MCS - Cam; 15%; MegaMynes Header; Invidia exhaust; Bosch 550cc OE Injectors; Mynes custom tune (248whp/198wtqe on E85)

 

See below.

Seems normal to me. Thats pretty much what I get "all city driving".

 

Eh, sorry, I'm thinking NA motors. They're all going to be a little different but peak power will be in the 12-13:1 range on pump gas. With the MINI being force fed, it needs to be a little lower.

Still, an 'economy tune' is going to be done at part throttle. I can almost guarantee that we're running at or over 1 lambda when cruising. With low combustion pressures, high advance and A/F ratio can be used to boost economy.

 

And at least in California, E85 is 13.3% cheaper than regular gas ($1.97/gal. vs $2.28/gal) so for premium the price would be roughly $2.48/gal for a difference of 20.6% which does not offset the loss in economy. Perhaps there is an E85 sweet spot for more or the same power with improved fuel economy.

 

No way would I live with that kind of mileage. Even after a tune. 215 hp with 350 mile tanks are fine by me.

 

350 mile tanks!? The only way I see that kind of mileage is if I do mainly highway which never happens. I get about 250-270 miles on average depending on my driving, but it's mainly city driving and the very little bit of highway driving is in traffic anyways, so it still sucks. When I'm lucky and there isn't traffic on the highway and I drive with gas mileage in mind I get about 300 miles (again with mainly city driving).

For me, I know I have to fill up about once a week. As long as I can control my right foot enough to make a tank of E85 last me that full week it's fine by me.

 

your car gets 350 miles per tank in the City? for you.

 

sorry.....that is my highway mileage......

I get about 300 with city driving.

 

That's about a 22% difference from Mike's car on E85, E85 is about 20% cheaper than 93 Octane and provides about 10% more power. Worth it to these pragmatic eyes.

 

You guys comparing your "miles per tank" is absurd. I could say I'm getting 121 miles per tank but it wouldn't mention at all that I only filled up with 3.9 gallons of gas. Bring the data or it doesn't exist. Oh, my percentages from above are based on the chemical difference between E10 and E85 and their respective stoich differences, not just picking that out of thin air.

If you're looking for outright power, E85 WILL gain power If you want to also keep fuel economy, you'd be fooling yourself to think E85 is a good solution.

 

City driving on E85: 18.1MPG (this is achieved by dividing the miles on my Trip meter by the # of gallons before the pump clicks off on its own).