Lean Burn Success

[rmay635703]

Originally Posted by 19bonestock88

Dual EFIE? I don’t follow...

Not sure what your asking

Modern cars have 2 o2 sensors a decent EFIE on each allows you to trick the car into thinking you are running rich and lean out.

A decent EFIE is variable and allows you to intercept your o2 sensor signal and set your AFR after you are up to cruising speed.

However a narrow band car looses resolution slightly above 15:1 AFR so you can’t normally get a car to run AFRs much above 15.2:1 with an EFIE

And no I’m not advertising, you can build an EFIE with less than $5 of parts there isn’t much to one.

[YukonCornelius]

Very Cool! I had lean burn setup on my 05 Cadillac CTS-V. It landed me about a 10% improvement at speed. I could watch my live MPG read out while it was switched on and off with the tuning software. Mine didn't kick on until the engine was over 180 degrees. I also had some extremely aggressive DFCO settings on.

[YukonCornelius]

Originally Posted by rmay635703

Not sure what your asking

Modern cars have 2 o2 sensors a decent EFIE on each allows you to trick the car into thinking you are running rich and lean out.

A decent EFIE is variable and allows you to intercept your o2 sensor signal and set your AFR after you are up to cruising speed.

However a narrow band car looses resolution slightly above 15:1 AFR so you can’t normally get a car to run AFRs much above 15.2:1 with an EFIE

And no I’m not advertising, you can build an EFIE with less than $5 of parts there isn’t much to one.

This is not true in my experience. GM put lean cruise into the Australian LS1 Manaro that wore standard o2 sensors and with a simple click of a button in tuning software you can turn the feature on in U.S. sold LS1 GTO. 16.3:1

[YukonCornelius]

Originally Posted by 19bonestock88

I’m just a little envious of you guys which have aftermarket tuning support on factory PCM, lol... I want lean burn so bad, because the engine is at relatively low load at a decent cruising speed, so I imagine lean burn would help lots, but the only thing I can do is use a SAFC or go standalone...

HP Tuners should support your GM cars. My 98 Cavalier was able to be tuned with it, so has every other OBD II GM I own.

[19bonestock88]

From everything I’ve ever read, HPT doesn’t support the E16a PCM in my Saturn, nor its application in the 05-06 Cobalt... only 07+ 2.2(L61) gets support

[YukonCornelius]

Originally Posted by 19bonestock88

From everything I’ve ever read, HPT doesn’t support the E16a PCM in my Saturn, nor its application in the 05-06 Cobalt... only 07+ 2.2(L61) gets support

Might be worth going sideways on a car sale to get into a supported platform.

[19bonestock88]

When I bought my 04 Ion, I passed up a black 07 sedan, equally equipped, with around 150k on it, for $500 less than my 04 was because I had no ride out to where the 07 was... I was a little concerned with rust with it being an OH car, but it was mostly the 180 mi drive that dissuaded me... my 04 was rust free, but ended up needing a full suspension rebuild... I think I got burned a little lol