420a injector questions

[Brian O Conner]

Were do you buy some aftermarket injectors besides the Accel that Ci motorsports has I need some help finding some good sites. Just to throw this out parts for this car are getting more rare as the time flys by.

 

[dsmtnr]

have you checked Fuel Injector Clinic?

 

[Bud92gsx]

Or RC engeneering,fuel injector clinic..

Dsm parts catalog... DSM Fuel Injectors - DSMtuners.com

 

[bagged420a]

What size do you need? And whats wrong with Accels?

 

[Brian O Conner]

Hello I have been buying performance parts for my 420a for a good time now and I have a question I want to run 20 pounds of boost on my T3/T4 turbo T04E. What is a good size injectors to be running for this amount of fuel. Thanks for everything guys.

for this amount of boost

 

[GsXdSmKingGsX]

What are you tuning with?

 

[phunny]

750's

 

[sparky1987]

Id ###### go with 650 or 680

 

[Bud92gsx]

Where did you get 490 injectors from?
What pump do you have?
Do you have an aftermarket fuel pressure regulator?

 

[Brian O Conner]

Hello guys, sorry for posting very similar posts but I have to ask first off will these injectors fit the 420a?650cc Mitsubishi DSM Injector Set (Low-Z)IS125-0650Mitsubishi DSM Injector Set: 4 x 650cc Peak & Hold / Low Impedance Ball & Seat Injectors Price: $289.00. Also what is the max psi I can run with these injectors I looked up the max injector size for the SAFC 2 and it was 750(people have claimed to do 800) so I think 650 is fine on this but I went to the injector clinic I also cancelled my order on the 490cc Accel injectors for my 420a. Also How much boost can I run without going too lean with 650cc injectors with a 255 Walbro fuel pump? and the MSD Coil pack, MSD wires and the NGK sparkplugs(I realise the ignition plays I small role but a better ignition will help it not go too lean I hear very un noticeably). Thanks for everything dsm tuners community?

 

[tec_41]

The 420a needs high impedance injectors (or a resistor pack+low impedance injectors, search for that one). So those will not be a direct drop in.

The SAFC is a poor way to control fuel on the 420a...you will have a hell of a time tuning such large injectors. Megasquirt is the way to go, trust me I've tried the SAFC thing.

Max psi isn't really the best thing to base how maxed out your injectors are...Maybe a ballpark would be 18-20psi? Someone correct me if I'm wrong. Every setup is different and will put out different numbers even with the same psi. I would assume you have a build bottom end? Because you shouldn't run more than 8-10psi on a stock block.