ECU Flash/Tune Questions

2353 Views 6 Replies 5 Participants Last post by D.T., 9 mo ago

6fitty

Discussion Starter · 10 mo ago

Looking to raise the AFR from about 11 to 14/15, has anyone done the same with an ecu flash/tune?

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D.T.

· #2 · 10 mo ago

How do you know it's 11 to 1?

13 is best for power.

I'd try www.mooremafia.com for a flash.

Maybe a Power Commander 5 or 6 for a DIY solution.

Power Commander 6 for 2017-2021 Suzuki V-Strom 650

Tried, true and tested the Power Commander continues to evolve with the Power Commander 6. Developed to simplify the user experience, PC6 makes choosing and tuning a map easier for the end user. All the same benefits you have relied on for over 20 years remain to keep you at the front of the pack.

www.dynojet.com

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OCL

· #3 · 10 mo ago

6fitty said:
Looking to raise the AFR from about 11 to 14/15, has anyone done the same with an ecu flash/tune?

If your bike is stock, it already is running 14.xx most times. Except WOT. Then it may go as low as 13:5. Anything higher than 14.7 will probably just kill your engine in the long run.

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Hans471

· #4 · 10 mo ago

Lean mixes run hot and can damage parts. Rich mixtures run cooler but can carbon up parts and reduce fuel economy. A manufacturer balances many factors when setting the fuel mixture. Besides the ability to run smoothly they also have to meet air quality standards (exhaust emissions). One should exercise care and be thoughtful when changing the A/F mix on any vehicle.

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PeteW

· #5 · 10 mo ago

Compression ratio is ~11:1. not AFR.

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6fitty

Discussion Starter · #6 · 9 mo ago

OCL said:
If your bike is stock, it already is running 14.xx most times. Except WOT. Then it may go as low as 13:5. Anything higher than 14.7 will probably just kill your engine in the long run.

Thank you, I did not know this

Hans471 said:
Lean mixes run hot and can damage parts. Rich mixtures run cooler but can carbon up parts and reduce fuel economy. A manufacturer balances many factors when setting the fuel mixture. Besides the ability to run smoothly they also have to meet air quality standards (exhaust emissions). One should exercise care and be thoughtful when changing the A/F mix on any vehicle.

PeteW said:
Compression ratio is ~11:1. not AFR.

My bad, I believe I was reading an older thread claiming that V-stroms tend to run rich. They might have been referring to the older generations.

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D.T.

· #7 · 9 mo ago

Usually most get 50+ MPG. If it was running rich at cruise MPG would be less than this.

Looking at the exhaust pipe and spark plugs can tell you if they are running rich or lean. Usually dark and sooty is rich. White and light colored is lean.

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