Fuel pulse dampers

[Loren]

Who has installed one in a car that didn't have one originally (90s Subarus to my knowledge) when upgrading their fuel system? 

[Andy_Mac]

Not really the situation you're talking but I originally didn't have any when I did aftermarket rails and lines along with deleting the factory ones. Found pressure fluctuations in logs was considerable so chucked some rail mounted ones in which smoothed things up heaps

[Loren]

Thanks.

 

How big were the fluctuations, if you remember?  I am seeing +/- 0.25 psi at idle.

 

Were they a problem for the tuner, or you just judged them as warranting the dampers before it got to the tuner?

 

 

[Andy_Mac]

Can't remember off the top of my head but it was probably something like that or more. I could clearly see it constantly moving around on the display which was what lead me down the track in the first place. Driveability was never an issue. 

 

The tuner didn't really care. I just did it for my peace of mind, easy to justify when you can see an actual difference in logs.