Injector flow variance

[hung_lo]

I just had my injectors cleaned and flow tested, and was wondering what would be the most efficient way to compensate for the variance in flow.

 Would it be using the “Individual Cyl Fuel Trim Table”?

I was thinking of using the “Single” mode, and assuming that I put the injectors in the order of the printout:

-3.12%
3.96%
-5.09%
5.02%
*based on the average static flow # of 512.50cc/min

does this sound correct?

[neil brown]

Turbo charged car ?

 

if change fuel trim for each injector how do you know if it’s richer on that cylinder 

 

individual lambdas on each exhaust port 

[hung_lo]

12 minutes ago, neil brown said:

Turbo charged car ?

 

if change fuel trim for each injector how do you know if it’s richer on that cylinder 

 

individual lambdas on each exhaust port 

I’ve included the flow test on the injectors.

there is quite a large variance between the injectors that i’d like to compensate for

[neil brown]

There is a 10% difference between injectors one the flow 

 

for me I would not be happy using them, would try to get other injectors and get the 4 close matching injectors 

[hung_lo]

I agree, I will be changing the injectors down the road when it gets a retune. 

I’d like to compensate for the flow variance for now.

[neil brown]

Can you measure each cylinder for  afm 

 

if not it’s a guessing game

[Adamw]

Yes, single mode with your proposed corrections would work.  To be honest they are pretty typical for those injectors I wouldnt be too concerned.

[Electredge]

I recently did an EVO 9 using and AEM 4 channel wideband and logged each cylinders AFR.... the unit isn't too expensive and with a Link I'm sure you could even send the CAN data into it and log directly to the ecu.  granted adding 4 bungs to a header/manifold might be a bit on the pricey side but it was good learning experience.