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Forum: General Efficiency Discussion

05-09-2018, 02:04 PM

Replies: 130

Why no more lean burn??

Views: 53,938

Posted By towndrunk

I reviewed some old logs and it appears the gains...

I reviewed some old logs and it appears the gains are about 3 to 5 mpg at 60 to 65 mph, depending on rpm. In other words, about 8 mpg at 1400-1600 and about 3 mpg at 1800 rpm. At 2000 rpm, little to...

Forum: General Efficiency Discussion

05-08-2018, 09:29 PM

Replies: 130

Why no more lean burn??

Views: 53,938

Posted By towndrunk

The first gen Volt is knock happy. Stock runs a...

The first gen Volt is knock happy. Stock runs a lot of spark to get good mileage. We found out the hard way that reducing KR reduced mileage. We were over a year into tuning before we figured out to...

Forum: General Efficiency Discussion

05-04-2018, 04:44 PM

Replies: 130

Why no more lean burn??

Views: 53,938

Posted By towndrunk

Sorry, I can't tell you an exact number since I...

Sorry, I can't tell you an exact number since I traded the vehicle last December. But I was getting 42 mpg @ 70 mph before adding lean burn.

Again, the gains from lean burn were at lower rpm, due...

Forum: General Efficiency Discussion

04-29-2018, 01:56 PM

Replies: 130

Why no more lean burn??

Views: 53,938

Posted By towndrunk

We are running lean burn in first gen Chevy Volts...

We are running lean burn in first gen Chevy Volts with good results, but does require a custom tune and open loop.

We run leanest (~20:1) at 1400 rpm (idle speed) and normal AFR above 2200 rpm....

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