fueleconomy.gov says 22/27 for the 5sp and 21/26 for the 6sp stock miata.

i'm gonna say it again: MBT means maximizing torque. more torque means more fuel. this is for power tuning.

in cruise you want to tune your AFR first and use timing to keep the burn in the cylinder. so what if you're beyond MBT in cruise? you've already changed the game by reducing fuel.

just raise all your timing into the low 40s
and raise your AFR targets below 70kPa to 15.5:1
stay off the gas on the highway.

you wont destroy your car.

 

MBT is determined independantly from AFR, unless limited by detonation. So running less MBT, with constant AFR does not reduce mbg...because AFR is constant per load cell. I'm sorry, but running lower KPA, with constant AFR means more fuel efficiency. This is irrefutable. Equal AFR with lower kpa = mpg increase.

Its not for power tuning, its for max efficiency in every cell, in every scenario.

 

You also might look at how you are driving the car on the street when you calculate your mpg. I'm tuned for 14.7:1 at cruise and I have no problem getting around 30 mpg. It doesn't take much to bring that number down.

 

Please lock this thread. This is ridiculous. Every thread this tool makes goes from him asking how something is done, us giving him advice, to him telling us we are wrong, and then tell us his "version" of the answer to his own question. Its a total joke....

 

The man drives a Miata, and calls everyone else gay, and you are just now figuring that out?!

 

I didn't just figure out anything. I'm just ******* tired of these fail threads. I feel more dumb every time after reading them just from the shear idiocy.

 

I really like you, and Ima let you finish. But I think this A/F target is too rich. Remember, we're talking about a non-EGR application.

Anyway it does seem this whole thing is pointless.

Trey, you can't get better than 22mpg with an 8:1 compression motor.

/end

 

That VW of yours had:
- stock computer running closed loop everywhere?
- electronic throttle?
- EGR?

/thread

 

1991 corrado had
Haltech e6k
cable throttle
no egr

lol

 

Then don't open them. The rest of us seem to enjoy the discussion that's produced - feel free to click your "back" button.

 

I'm sure y8s and Ben really get a ton of enjoyment out of repeating the same information over and over until Hustler finally gets the ******* clue.

 

He's had a clue?

 

15.5 is the hustler value. for you, pick any value you want.

 

I'm getting such a clue right now

 

Thanks bro

My clue's pointing this way.

 

I have a clue. lol