I'm going to get some injectors off of a 89 Z turbo. They will fit in my VG engine right. Just want to make sure first.

 

They probably won't work with your ECU.

 

will they not enhance the performanceor do you think they will not work with my car period. i would think the fuel injectors would definetely have higher circulation since its a turbo.

 

i think the only way you're gona get more flow is if the resistance value is different. At least thats how it is on my friends toyota MR2..hes getting celica injectors that have a different resistance value so they flow more(thats what i was told)

 

They'll fit but they won't work correctly. The engine still thinks its squirting in XX amount of fuel when its really putting in XXX amount of fuel. And no, there will be *no* gain in performance, as a matter of fact, they'll probably make you lose performance without redoing the ECU or getting an Air/Fuel Controller(Apex'i AFC, Fields SFC, etc)

 

Well this is an iffy question. Let's examine this a bit. There is two modes for the ecu open and closed loop.

Now in closed loop the ecu is using readings from the various sensors ie.. o2 to determine the correct pulsewidth to get the correct a/f ratio. In this mode, as long as the injectors are not too much larger than stock, I think the ecu can accomodate different injectors.

Now in open loop, ie.. cold start and wot, the ecu is not using sensors to determine the correct injector pulsewidth, the ecu is using pre-determined fuel/timing maps. So for whatever injector you have in the car, it will pulse xxx amount no matter if the car is running rich, lean or whatever. Now since you are using bigger injectors, they will injector more fuel per pulsewidth. So you might run REAL rich during warm up and wot conditions.

I might be backwards on the open/closed loop terms though but that's the basic story.

 

That doesn't sound so bad. On a long trip after the exhaust gets a little hot, you could rev it out on the freeway and blow some nice flames out the exhaust LOL

 

When I get the JWT ECU can they program the chip to work with the new injestors. I also need to know If I need a new computer for my max when I convert it to a 5-speed. We are going to convert it and use the stock ECU but I have A feeling that the 5-speed uses a different ECU. For the couple of guys who have done this swap please let me know. I'm sure there are other guys who know too. Thanks

 

The auto ECU has a tranny controller. Not sure if that effects the way the 5 spd will work since its not computerized. You'd probably get an error code. And the JWT injector upgrade is $100 added to the price of the ECU

 

Alright thanks Mike that answered my questions. I'll probably just get a new ECU to play it safe after the conversion. Anyone know what the prices run for a used ECU from an junkyard for a VG 5-speed? Thanks

 

I think DanNY was selling a ECU that you could use as a core..