OK so im sure all of you know that it is possible to adjust the air fuel ratio by removing the cover on the afm and moving the cog wheel clockwise or counterclockwise.
I have literally been online for a total of 4 hours trying to figure out what is better to run for specifically more power without damaging anything.
I know if i run lean i get better mpg but higher cylinder temps and maybe can destroy some pistons, nothing came up as far as power gains.
I know if i run rich i can get less mpgs lower cylinder temps cuz the gas cools it down, and some people did note some minor power gains.

So what i finally came up with was:
Run 2 clicks richer with my valves running a little tighter (to get a little more lift and minimal gains in top end power) due to the lower cylinder temps which means my valves expand less.

What do you guys think? and any more info would be awesome.

Also the current mods to the engine are battery intake swap with K&N cone filter and supra Afm And no catalytic converter(until i get my LC header)

 

Personally I would start out with, what does the engine need? is it running rich or lean now, whats the plugs look like, leaning it out will increase power, but can be hard on internals, rich will lower power and burn more fuel. But just to start tweaking the AFM is a hard way to tune.

 

Im not too sure what it needs ill pull a plug later today and ill see if i can take a pic but i really have no idea whether it needs to be leaner or richer. maybe i should just go a click or two leaner?

 

I think hes just doing it to get more power.

 

Exactly. And i really wanna do this cuz this is basically free power if i do it right.

 

Nothing is free when it comes to cars. Best power is neither rich or lean...if you could run a perfect 14:1 ratio through your entire rpm range that would net ya the best power. That's what pros do when they tune a car. Obviously there are times when pros run rich, but those are usually race only motors as far as I know

 

It may not be free but it does not cost me a cent when i do this.

 

I would say the amounts of power you get are so small its not worth doing to your truck. Do you have any other mods? Headers, etc, etc, etc? If you really want power save up all your money and open all your piggy banks and do a motor swap.

 

Don't worry, it'll cost you, lean it out enough and it'll really run good just before it self destructs.
be stoich, be happy

 

Yup like i said In the beginning im going to be getting some headers from lcengineering soon.
Nope no engine swap im happy with the 22re if i wanted to i could put something else in but i really dont I just wanna be able to make as much power from it (safely) as possible.

And yes I know if i run it too lean that s*** will blow up ive seen it already.
Im looking for a slight increase or decrease in a/f ratio nothing drastic, this will only cause minimal gains but if all it costs me is 0 dollars to get 1 hp Its plenty worth it to me.

 

I'd leave it alone.

You're running a stock 22RE right?

 

nope not stock it has a bat/intake swap, supra afm, KN cone filter.
I may just take it to get tuned on a dyno proffesionaly

 

I'd say I'd set it back to regular adjustment. not worth spending that extra bit of gas over .25 hp.


as for tuning on a dyno professionally... how do you plan on doing that?

 

Theres a place called evil genius racing near my apartment that has a 70,000 dollar mustang dyno and they tune miatas bmw's acuras evos and pretty much anythingh that goes in there shop. its 150 dollars an hour on the dyno so i may just do it when i get the headers to make the biggest difference.

 

you can tune anything you want but you can't do **** to your factory ECU, it's wayy to damn conservative. If you got some kind of engine management system, you can do that, and in the meantime, you'd drop the AFM and do much more to your motor.

If you can match your engine's timing to your rich adjustment, you can probably make it better that way.

 

Yeah i see no significant gains. Maybe the professionals know a few more tweaks they can get out of the truck, but with a stock ECU, i would have to agree with cin, not much options for fine tuning.

 

There really are no tweaks.

and what's this professional you speak of?


If this were a Subaru we're talking about, I'll be playing with air fuel ratio maps and stuff, but we can't do that right now. and on a Subaru, my friend doesn't even use a dyno. Putting down 400+ftlb of torque from 4800 til redline. and 375+hp.... gawd its a fast car.

 

I was refering to the people with the dyno he wanted to go see.

 

I'd spend the 150 on a cam instead.... But, that's just me....

Would be cool to see what they find while your at the dyno tho... I'll put some money down that it's already on the lean side with that supra afm...

 

Well as far as i know they tune off of the factory ecu.

They are called evil genius racing in sacramento google em they have a website.

They tune old miatas early 90s off of the afm and distributor and they note about a 5 hp increase regularly.

Also i will be getting a cam im just trying to squeeze every bit of horsepower out of it before i do major upgrades like that.

besides, its a process to me and i dont have a problem doing the little things first.