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Hi. Tuner is selling an adjustable fuel regulator.
Idea is that you can adjust for a higher fuel rail pressure for the same vacuum reading and thus get up to 15% performance increase.

Has anyone tried this?

It seems to me that the O2 sensor will see the richer mixture and shorten the pulse back anyway.
Is this correct?
 

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Hi. Tuner is selling an adjustable fuel regulator.
Idea is that you can adjust for a higher fuel rail pressure for the same vacuum reading and thus get up to 15% performance increase.

Has anyone tried this?

It seems to me that the O2 sensor will see the richer mixture and shorten the pulse back anyway.
Is this correct?
Just because the pressure is higher doesn't mean the car will run richer, so I will say no.

Some people say the car has much better throttle response from having one fitted though but it isn't something I can really comment on as valid or not as I've not played with them.
 
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