Author: Bodyart99uk
Subject: ALL tuning box/chip, ECU remap, code red, blue fin
Posted: 16 Jan 2014 at 8:24pm
Please please please DONT upgrade the fuel pump and expect to get more power and - steer well clear of any tuning house that tells you that's how to get more power from ANY forced induction engine - it's just plain nonsense!
I won't go into all the technical details(not enough time/space) but suffice to say the fuel demand is controlled by the MAP dependant upon a number of factors, not least of all boost pressure, controlled by the engine speed,turbo config and (let's not forget) the MAP - anyone starting to see a pattern yet?
Look at your fuel system- at the most basic you will see a feed line,injectors and a return line so please ask the tuning house how exactly the car will use more fuel for a specific injector opening (as specified by ... Uve guessed it -the MAP) ? All the extra fuel your shiney new (£250?) fuel pump will simply go straight by and come back to the return- only difference is it will come back to the tank at a faster rate, potentially causing (believe it or not, I don't mind) problems with fuelling as a result of excessive fuel swirl.
The only way to get the car to burn more fuel for a given injector opening (other than MAP modification) is to increase the fuel pressure - but what's the point? You will not make more power (well perhaps 1bhp) but you will burn significantly more fuel (e.g, 3bar increase to 4bar will burn say up to 33% more fuel but NOT make 33% more power) because the combustion conditions simply do not demand it - you are simply rich ending the mixture, taking it further away from the ideal stoichiometric
A fuel pump CAN be a limiting factor in making more power but only at the upper ends of a modified map not on its own - well not unless your car was designed, built and run sometime around 1973
But hey each to their own if anyone wants to upgrade their fuel pump, knock yourselves out, just don't expect big power hikes just from this mod on its own
Subject: ALL tuning box/chip, ECU remap, code red, blue fin
Posted: 16 Jan 2014 at 8:24pm
Please please please DONT upgrade the fuel pump and expect to get more power and - steer well clear of any tuning house that tells you that's how to get more power from ANY forced induction engine - it's just plain nonsense!
I won't go into all the technical details(not enough time/space) but suffice to say the fuel demand is controlled by the MAP dependant upon a number of factors, not least of all boost pressure, controlled by the engine speed,turbo config and (let's not forget) the MAP - anyone starting to see a pattern yet?
Look at your fuel system- at the most basic you will see a feed line,injectors and a return line so please ask the tuning house how exactly the car will use more fuel for a specific injector opening (as specified by ... Uve guessed it -the MAP) ? All the extra fuel your shiney new (£250?) fuel pump will simply go straight by and come back to the return- only difference is it will come back to the tank at a faster rate, potentially causing (believe it or not, I don't mind) problems with fuelling as a result of excessive fuel swirl.
The only way to get the car to burn more fuel for a given injector opening (other than MAP modification) is to increase the fuel pressure - but what's the point? You will not make more power (well perhaps 1bhp) but you will burn significantly more fuel (e.g, 3bar increase to 4bar will burn say up to 33% more fuel but NOT make 33% more power) because the combustion conditions simply do not demand it - you are simply rich ending the mixture, taking it further away from the ideal stoichiometric
A fuel pump CAN be a limiting factor in making more power but only at the upper ends of a modified map not on its own - well not unless your car was designed, built and run sometime around 1973
But hey each to their own if anyone wants to upgrade their fuel pump, knock yourselves out, just don't expect big power hikes just from this mod on its own