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Installed Rb20det Injectors. Strange AFM operation?


stagefumer11

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Installing the injectors were a easy task and low imediance, This is on a l20et btw,

 

Now in theroy you detenion the AFm By 10 teeth or so, This leans the mixture out since you have more CC's in my example 270cc's over the factory 185's

 

Ran the standard tention and it idled fine smooth as. Suprising really

 

Detentiond the AFm, and when hitting any kind off boost it just broke down, Decided to detention it some more, And it got worse,.

 

After scrathing my head, I have to tighten it 50% or so to be able to run boost. Its not pinging ect runs great. Possible needs a little bit of leaning out. But in my method hasnt it been reversed ? Im am confused on this matter.

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My calculations tell me that you need to turn it down 31.5% or so.

 

185 x 270 = 18500 x 270X (cross multiply)

.X.... 100

 

270X / 270 = X

 

18500 / 270 = 68.5

 

Take 68.5 out of 100% to get your new injector duty: -31.5%

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ah. But if i back the AFM tention off anymore than it is, It will not rev when in boost, It just breaks down. Which is surprising.

 

I had similar problems with the factory injectors and installing a N/a Afm Off a l20e. I had to install my Airtemp sensor tho. The N/a tention was way off compared to the Turbo afm.

 

Came right with the Right tenstion.

 

MY question is. BAcking it off 30% or so. Whould induse overfuling missing. How can i over come this ?

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