I have a chance to get some low imped bosch 1600cc top feed brown top injectors for my 88 rx7. I believe the 550cc primaries are high impedance.

First of all what do I need to do (smaller orings)? to make these fit in my fuel rail.
and what do I have to do in haltech to account for the high.low imped mix of injectors, and does this cause any problems?

 

Only pre-88 Turbo injectors are 550cc and low impedance. I would suggest you use all injectors of the same impedance.

After the first half of 88, till the S5 model year, the injectors where high impedance.

Make sure you messure them with a multimeter.

 

Uh... That was 87.5, not 88.5

Rat

 

i thought for a haltech, it doesnt matter what they are

 

We just answered this several threads down...


-Ted

 

It is always better to use the same impedance on a haltech so you don't stress out the injectors.

Use a drill press to enlarge the holes on the rail to make the fuel injectors fit, the 1600's that is.

If your main setup is for high impedance injectors and you want to add some low impedance injectors just use resistors to make them all match up

 

Bullshit.

Bullshit.

Bullshit.


-Ted

 

Please explain your reasoning for discrediting me for I am on a quest of knowledge here.
I have seen alot of guys at the shop hone out the stock rails for the larger 1600 injectors.
It makes sense to have matching impedance injectors on a single driver doesn't it?? I mean after all they have different characteristics given the ifferent resistence and power needed for them.
And for the resistor thing, thats exactly what you do to add GSL-se injectors on to a S5 TurboII so why not somewhere else??
???????

 

If that's the case then read more and stop posting wrong information.


Drill press?
You gotta be kidding me.
You just insulted all the serious machinist out there...

It does, except all the Haltech units I know of can drive one fuel injector per driver on a 13B.
Now you understand why it's not necessary?

You're trying to apply STOCK ECU application to a stand-alone EMS???
I HIGHLY recommend you go read the Haltech manual.
It's even DL-able from their website - http://www.haltech.com/


-Ted

 

You're right. I didn't litereally mean a rugged old drill press. I did mean for it to be machined. As for the haltech using one driver per injector I was under the impression that the injectors shared drivers from thje way it was explained to me or the way I understood it.
As for the injectors and using a resistor I still don't understand why you can't do that. It's an electrical circuit and all it sees is a resistance through it. So why can't it be tricked??
Anyhow I am actually printing out the haltech manual right now since I already have one awaiting installation.
Thanx for the info Ted.......

 

No, the Haltech uses at least 4 discrete drivers.
Normally, each fuel injector (for a 13B) gets its own driver.
It's in the Haltech manual.

You *can* do that, but it's really a waste of time.
There is a slightly advantage to running low-impedence fuel injectors.
But installing resistors, you just negated that small advantage.
Low-impedence fuel injectors "react faster", so if the driver can handle the current loads, why not let it run unmolested?
I didn't say you was wrong, I meant to imply it's unnecessary to do so.


-Ted