drft_n_sc

iTrader: (3)

Are the LS400 injectors 440cc and high imp?

Thank you all and thank you for your time

billydpowe

iTrader: (1)

WILL THIS HELP???
The stock Lexus SC400 and LS400 1UZFE injectors are top feed high impedance 13.8 ohm with 251 cc/min and estimated around 50.2 bhp each injector or 401.6 bhp total. If you plan to have any type of forced induction like turbo, supercharged or NOS, larger injector will be needed. Stock injector is max out around 6-7 psi. Anything higher than that will require larger injectors. Upgrade to 440 cc/min will yield around 86.0 bhp each that is around 688 bhp total.

If you are thinking about getting the Supra MKIII Turbo injectors. They are 440cc top feed, however, they are low impedance. They would not work on our cars unless you do some modifications on the ignition system to change it to low impedance. Therefore, you have two choices for upgrading fuel injectors in the 1UZFE engine.
1. The easiest way is to get the proper size injector for your setup in top feed and high impedance.

2. The cheapest way is to get the Supra 7MGTE injectors and modify your ignition driver.

If you want to know how many horse power is your injector good for. Just use the injector size, usually its in cc/min. time 5. That will give you bhp.

good luck, what are you trying to do?

drft_n_sc

iTrader: (3)

Yeah I found that info on lextreme shortly after posting this message, I'm trying to find some 440cc injectors that are high impedance and I read somewhere on sf that the ls400 fit that description. I just wanted to verify and make sure that it was true, but sadly it's not

3UZFTE

I'm not sure if your talking about a MKIII Supra, but what you probably read is that you can take the 440cc injectors, and match them with the LS400 Air Flow Meter, and the reason for using the AFM is because it basically commands more fuel from the Supra ECU than the stock MKIII AFM. And I believe that the MK3 Supra has the 440cc Hi-imp injectors, for what it's worth(fwiw).

Is it the Injector that is maxed out? Or is it the fuel trim that is maxed out?

e57820

Cressida 7M injectors will drop right in, they are 315cc and you don't have to fool with resistor banks to run them. I have them in my car. Just pop them in and you are ready to go.