Eco Block from crawford performance

The math our Eco Block changes in the computer is similar to what is changed with a CAI so you cannot / should not do both.

Did your vehicle come from the factory with the supercharger?

 

Tacoma's do not come from factory with a Supercharger. Most of us have the TRD supercharger which is a Toyota TRD part that comes with Toyota blessing that is installed on the truck once it's at the dealer or in private hands. It has it's own tune, that is flashed onto the factory ECU, that is usually a bit rich.

 

well poo

definitely rich.. trying to get mine into that perfect sweet spot.. i believe it needs to be leaned out just a tad. although.. i should probably spend some money and time doing some dyno runs to see whats really goin on instead of just the butt dyno and my AFR gauge.

 

You should be more seriously considering the MAF Cali, to get the flexibility you need to fine tune it. There is no ability to tune this MAF spacer, and getting AFR wrong on an SC could be quite painful/expensive.

 

Being slightly rich is safe on a boosted application. That's why the TRD S/C flash is rich. Being lean is what can cause a very high repair bill.

I've looked into the MAF calibrator from URD. It's nice but I'm not ready to start cutting into my factory harness quite yet.

 

In that case it should work then.

 

They make harnesses.

 

Not for the newer 2nd gens .

 

Mine still stumbles on take off but gets going real well around 35mph and continues strong through 75mph.
I'm still looking to improve that elusive low end torque

 

Being to lean can cause a very high repair bill. But that's the whole goal as a tuner essentially to see how lean you can get it with out being detrimental to the engine. Engines make the most power running lean.

Atleast this is what I recall from my Hondata and AEM days. But maybe boosted cars are a different story and make more power being leaned out because of the air coming in being denser.

 

The goal is to have 14.7 a/f ratio thoughout the engine rpm, load, etc. That is the perfect amount of air and to completely burn all the fuel. If you not burning the fuel you are wasting it, or using as a heat soak.

Running to lean will cause it to run hot as more oxygen will burn hotter, which can lessen or end the life of an engine.

 

Gotcha. I remember 14.7 being idea at ideal and guess getting everything as close to that as possible throughout the rpm range was the ultimate goal. Granted I feel like my turbo cars always ran a little lean in 15-16 range. But always made respectable power and I never had any internal engine issues.

 

Running too rich as well as too lean hurts power and the engine. Too lean causes pistons to burn and to rich washes down the cylinder walls.

 

14.7 to 1 is the ideal Stoichiometric or Theoretical air fuel ratio... but if you try to run that lean at full load then you can kiss your power and engine goodbye.

 

I recall WOT afr's in the 12-13's

 

Yes mid 12's to the very low 13's depending on the engine for an N/A application.

 

Running 14.7 throughout the entire rpm range and load range is not safe.

1GR factory programming runs ~ 14.7 for most of closed loop. Depending on the load, rpm, and TPS, IAT, & coolant temps, open loop AFR's are usually in the mid to low 10's. N/A and TRD reflash for the s/c. At 100% load, mine sees 10.0-10.2 AFR. Still way to rich for optimum N/A power.

Here is a short video demonstrating the OEM ECU 's control of Open and Closed Loops.

https://www.youtube.com/watch?v=ErPJEn2TmSY

 

This.. I'm at a consistent 14.7 via the AFR gauge. I would like to just dial it in perfectly.. which.. ultimately is the goal for all of us.. Just trying to get there like the rest of us. At WOT.. I'm around 11-12.. I believe.. keeping an eye in it while driving always proves to be difficult.

Maybe the URD MAF Cal is in fact the way to go. It would be the best time to get it since everything else is done now prior to it.

 

Yes at full engine load 14.7 is too lean. Needs to richen up

 

There in lays the problem WOT requires more fuel to make the power it is not a lean mix. A lean mix increases emissions (HC) it is not something the EPA likes and it does not increase power or for that matter economy what any gas engine wants is a perfect mix of fuel and air (14.7:1) and the designers try their best to achieve that.