550CC injectors

[roadboy]

hey im going to install my injectors and i was wondering if i needed anything else?
im going to use the 440cc rubber parts on the bottom and top, am i suppose to?

my injectors are RC 550CC dsoent have the rubber parts like the stock 440cc has

 

[radiod]

I'd by new o-rings just to be safe, but that's me. Fuel's not something worth messing with for seals, one small leak and your engine bay turns in to a BBQ. I can't remember if you have to do anything with the pigtails, but I'm sure someone else can chime in on that.

Otherwise, assuming you have the other supporting mods (AFPR, pump, J-tube mod, and electronics), you should be good to go and get tuning

 

[TurboStreetCar]

Better supporting mods would be a LEXUS AFM and Tuning device.

Get new seals, there cheap and can save a car fire.

 

[radiod]

Better supporting mods would be a LEXUS AFM and Tuning device.

That's one way, and that's what I meant by electronics. Other options can be the MAFT setup, or doing a full ECU replacement using the AEM system or some sort of equivelent.

You still need the AFPR, fuel pump, and J-tube mod done to support the larger injectors. You could possibly get away with just doing the AFPR and J-tube mod, and I've seen it run that way before, but you do run the risk of starving fuel, which means detonation, which means a very unhappy engine.

None the less still, new seals = no leaks = no BBQ under the hood.

 

[TurboStreetCar]

Injector size has nothing to do with pump, regulator or j-tube. Higher power output requires the larger pump, the larger pump out flows the stock regulator and the j-tube. Injector size will have no effect on this system as larger injectors will open for a shorter amount of time passing the same amount of fuel as the smaller injectors that are open for a longer period of time.

 

[roadboy]

okok i got it, i was just asking because i installed my injectors like 2 times, it was leaking. installed upper and lower rubber parts. so i wasnt sure why its leaking

 

[TurboStreetCar]

Prolly cause there 20 years old and worn out. Definitely invest in new seals, fuel is the last thing you want leaking.

 

[roadboy]

hmm, thats weird i installed my injectors and a lex amf but when i start it its showing its too lean!! put the stocker afm and its at stoich. am i missing something here?

 

[87M-GTE]

You're gonna have to adjust the LEX afm, theres an adjustment screw on the bottom of it.
Did you drive it with the LEX yet, or just start it?

Sam

 

[Koenigturbo]

I'd by new o-rings just to be safe, but that's me. Fuel's not something worth messing with for seals, one small leak and your engine bay turns in to a BBQ. I can't remember if you have to do anything with the pigtails, but I'm sure someone else can chime in on that.

Otherwise, assuming you have the other supporting mods (AFPR, pump, J-tube mod, and electronics), you should be good to go and get tuning

chimming in: You'll need the pig tail adaptors.

 

[TurboStreetCar]

hmm, thats weird i installed my injectors and a lex amf but when i start it its showing its too lean!! put the stocker afm and its at stoich. am i missing something here?

This is why the AFPR is useful as you can make a broad change to the mixture that pertains to your situation without effecting the curve of the tune.

New injectors or used? brand?

 

[roadboy]

Brand is RC
couldent even run properly with the lex, its always at lean, ran with stock afm its at 14.x never goes rich or lean but just around 14

used but flow tested