Resistor pack for low impedance injectors on 1JZ?

[skin]

Answer me mo fos

[stradlater]

Firstly - There are readily available resistor packs in Volvos @ wreckers. I bought 4 of them, for 2/5ths of fuck all. And they work a treat for the low impedence 440cc injectors.

Secondly - you are right. when you parallel the output like you said (with 3 resistors instead of 6) the resistor needs to be double the size.

Again, the volvo injector packs are the way to go. They are exactly what you need.

[CrUZida]

You won't need to double the size.

With 1 x 13.8ohm injector the ECU sees 13.8ohms
With 1 x 2.7ohm injector the ECU sees 2.7ohms
With 1 x 2.7ohm injector, and an 11.1ohm resistor the ECU sees 13.8ohms.


With 2 x 13.8ohm injectors in parallel the ECU sees 6.9ohms
With 2 x 2.7ohm injectors in parallel the ECU sees 1.35ohms
With 2 x 2.7ohm injectors in parallel, and a 5.5ohm resistor, the ECU will see 6.85ohms.


Hence the requirement for 5.5ohm resistors.
With 2 x 2.7ohm injectors

[stradlater]

Ah yes, he's right. Forgot my elementry electronics...
1/R, not R.

[nuk1ear]

Honestly, i would prefer to use a PEAK AND HOLD driver. Check out:
Peak&Hold Injector Driver Board v2.0 for Megasquirt
Unfortunately you need 2 as they can only drive 4 cyl each, but still, pretty cheap considering the price of alternatives

[nuk1ear]

RS electronics have the little resistors you want

RS have 'trade counters' where you can go and get them from...

$2.49+ ea, come in a wide range of values (10watt)

Edit: I'd prbly go with 25W ones tho, $3.59ea+... but then again I'd prbly use a resistor pack off something else as has already been suggestd!

e.g.


Buy High Power Resistor,metal cased,power,25W,5%,6R8 Arcol HS25 6R8 J online from RS for next day delivery.


Cheers
Wilbo

I wouldnt buy any resistor with such low resistance with anything worse than 1% tolerance. When you are talking about injectors, you need them to all be working as similarly as possible, 5% is too much IMO. 25W is good, but you want 1% tolerance.

[nuk1ear]

opps forget my post about peak and hold, your not using an EMS