i dont know if its necessarily true, and i dont understand it myself, but alot of people are telling me i need to change my fuel regulator since i put in a boost controller...my car isnt used to getting alot of gas or some crap he was saying..i know alot of people who put boost controllers in...rx-7, 300zx, even a lexus IS 300...lol...and noNe of them did nething to their regulator...i know fuel systems r different...so if u know nething, lemme know...thanx

 

an adjustable regulator might be a good idea, itll let u control the amount of fuel a little better..........

 

thats an option and ive thought of it, but i need to know if its inevitabe to change it

 

if the car is runnin ok now i dont see why you would NEED one, but if your gonna mod the car anymore you will probly eventually need one.........

 

Basically, if you change the fuel pump it might be a good idea, but the stock fuel system is ok for a stock turbo. DSM's have a "scavenge" type fuel system, what this means is the fuel pump sends more than enough fuel to the fuel rail so that there won't ever be a lean condition(in stock trim atleast). All the extra fuel that's unused is scavenged by the fuel return line and sent back to the tank. Most factory turbo cars have this setup as a safeguard, while NA cars have a non-return type system. On a Civic for instance, they have a regular system that sends just the amount of fuel needed to the fuel rail, Nothing more and nothing less, there is no return line to the tank. So when you turbocharge a civic, you'll need a bigger fuel pump to compensate for the extra air coming. Now, since the amount of fuel coming in is dependant on the fuel pump, you'd have to properly match a fuel pump to the amount of power you want to make. This is where the fuel regulator comes in handy. For the turbo civic, you can just get a big pump and stick the regulator in between the pump and rail and dial in the amount a fuel you want going to engine. You *can* just go get a Supra fuel pump and a regulator right now and get used to how the system works, just in case you plan on making big power later on

 

you do not have to change your fpr, just because you put a mbc on. just dont turn the boost up to high so that you over boost your turbo. you will only have to change the fpr when you change fuel pump. if you put a 255 walbro or something like that then it will over run the fpr.

 

its not a mbc..its an electronic...i just heard im gonna get ****ty gas mileage if i dont change it

 

Naw, you won't have any problems if you don't change it. Whether it's manual or electronic, they both do the same thing and neither will interefere too much with the concept of gas mileage.