cossie yellows in agu ??

[madhead1987]

hi ,all i was on the serch for some yellow calibra injectors and eneded up with cossie yellows , my question is will they work better or worse than the calibra ones ?i did some reserch on then there flow rate is 311cc per min any help would appreciated
reece

[Wazzzer]

I think they are different impedance mate so won't be any good

Give me a part number and I'll look it up after work tomorrow

[Chris.]

Bosch part number?

Same chubby fitment as AGU ones?

[madhead1987]

There not Bosch there weber did some research last night this Is what I found

Weber Iw-025/02 injectors flowing around 300cc @3 bar 2.4 ohm
Believe to be same as Bosch light green 280 150 355 don't quoted on that tho

[Wazzzer]

Cossie yellows were only used in the RWD Cosworths. They changed to blues in the 4x4. Should be the same fitment but not sure on impedance yet, bear with me

[Wazzzer]

Cossie injectors are very low impedance, 2.4ohms. Calibra yellows are 14.5ohms

[madhead1987]

Does that mean no good ? Or ok ?

[Wazzzer]

no good mate. The impedance needs to be close or exactly the same

Low impedance injectors are peak and hold type, they are designed to work with an injector signal that has an initial peak voltage to get the injector open as fast as possible (this is good) and then a maintenance voltage to hold the injector open for as long as desired (about half as much as the open signal). This system allows for a high initial peak current that would other wise damage the injector if used continuously.

High impedance injectors are saturation type injectors, they are designed to use a simple square wave signal to open and close the injector.

[madhead1987]

Is there a way I could make them work ?

[Chris.]

doubt it

calibra yellows can be had for £30-40