420a injectors

[Slow_Rs]

what are some good aftermarket injectors for the 420a? i’m not sure what cc to run on the car considering it’s a stock ecu atm, i am going to be getting a walbro 255l pump as well to pair with aftermarket injectors.

any help or feedback is appreciated.

 

[VelocitàPaola]

There's not much of an advantage to running aftermarket injectors if the rest of the fuel system is stock. I'd go for an aftermarket fuel controller/EMS or even an FMU/S-FMU before getting new injectors.

 

[Slow_Rs]

There's not much of an advantage to running aftermarket injectors if the rest of the fuel system is stock. I'd go for an aftermarket fuel controller/EMS or even an FMU/S-FMU before getting new injectors.

alright, what’s a good brand to go through? any recommendations? i’m trying to do little things at a time to the car so in a good bit i’ll be able to turbo it with no issues on decent boost

 

[Sjd6795]

So first things you need are a boost and wideband gauge, will only read vacuum until you turbo it. Then from there you need a way to tune the car I'm not sure what the 420a guys use. You cant install a 255 and larger injectors without having an adjustable fuel pressure regulator and a tuner to adjust for larger injectors.

 

[BLACK'98DSM]

Wideband first, before anything else. Don't give the car more fuel unless it needs it.

You may also want to consider replacing your fuel filter. It doesn't flow very well once it's old and clogged.

FIC (Fuel Injector Clinic) makes a few injectors for the 420a. I think the smallest they make are 350cc, which are good for low boost.

As stated, the Walbro 255lph is a good pump. I read somewhere that the stock pump flows 215lph, so that's a pretty good increase.

There's no need to "upgrade" the fuel rail. There's not many options, and the aftermarket ones don't have the pressure checking fitting.