as i said an afpr has never really been considered a 'performance mod'. the factory fpr is also rising rate like most other cars just not adjustable.... it will richen/lean fuel mixtures across the entire A/F curve which is why it is labelled a "temporary band-aid fix" until a car is actually tuned by a proper ecu to richen/lean mixtures at different rpm points.Quote:
Originally Posted by Mr_will
you will gain power somewhere in the rpm range where you have a trouble spot at the cost of power somewhere else... kind of like putting high rpm aggressive cams in a non-vtec car.... they will lose power down low and have a lumpy idle as a price to get top end power and vice versa.
***EDIT***
as stated by this honda tuning dedicated site:
What he is talking about is a seperate rising rate unit on top of an fpr... the SARD unit is already an adjustable rising rate (or whatever the original poster has... looked like a SARD)Quote:
Originally Posted by http://www.phearable.net/tech/efibeginnerguide.html
The only thing he is wrong about is the "Flow rate" part as it technically doesn't increase flow.. just forces out more fuel through injectors for every pulse width.
That explanation with the boost is also why i said the above 10% formula isn't exactly correct and only applicable to the rising rate/vacuum operation... and again that 10% figure is skewed by boost pressure in the intake. The rise in rate of fuel pressure is controlled by intake vacuum as well as the fuel pump... each pump provides a certain pressure already which is why the Walbro + AFPR = ???psi shouldn't be taken as gospel either.
