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Model specific boards => Golf mk4 => Topic started by: madhead1987 on 30 August 2012, 21:09

Title: cossie yellows in agu ??
Post by: madhead1987 on 30 August 2012, 21:09

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

Title: Re: cossie yellows in agu ??
Post by: Wazzzer on 30 August 2012, 21:59

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

Title: Re: cossie yellows in agu ??
Post by: Chris. on 31 August 2012, 00:28

Bosch part number?

Same chubby fitment as AGU ones?

Title: Re: cossie yellows in agu ??
Post by: madhead1987 on 31 August 2012, 13:25

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

Title: Re: cossie yellows in agu ??
Post by: Wazzzer on 31 August 2012, 13:34

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

Title: Re: cossie yellows in agu ??
Post by: Wazzzer on 31 August 2012, 13:40

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

Title: Re: cossie yellows in agu ??
Post by: madhead1987 on 31 August 2012, 14:53

Does that mean no good ? Or ok ?

Title: Re: cossie yellows in agu ??
Post by: Wazzzer on 31 August 2012, 14:57

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.

Title: Re: cossie yellows in agu ??
Post by: madhead1987 on 31 August 2012, 15:05

Is there a way I could make them work ?

Title: Re: cossie yellows in agu ??
Post by: Chris. on 01 September 2012, 20:37

doubt it

calibra yellows can be had for £30-40

Title: Re: cossie yellows in agu ??
Post by: simon_709 on 02 September 2012, 12:51

Sorry to steal the thread, but are calibra injectors definatley the ones to go for when upgrading? Or are S3 ones better etc??

Title: Re: cossie yellows in agu ??
Post by: Wazzzer on 02 September 2012, 15:39

Depends if you have an AGU or AUM/AUQ

Title: Re: cossie yellows in agu ??
Post by: simon_709 on 03 September 2012, 06:18

I've got a agu.. And u need to uprate them when you go for stage 2 don't you?

Title: Re: cossie yellows in agu ??
Post by: Wazzzer on 03 September 2012, 09:23

No not for stage 2, standard will do up to around 225bhp. S3 injectors don't fit the AGU. If you do fit bigger injectors you'll need a bigger MAF too

Title: Re: cossie yellows in agu ??
Post by: simon_709 on 03 September 2012, 10:05

Ohh ok glad u told me that lol. So the calibra ones are the ones to go for then..?

Title: Re: cossie yellows in agu ??
Post by: Wazzzer on 03 September 2012, 11:06

Yes unless you go for a K04, then you'd need Saab reds

Title: Re: cossie yellows in agu ??
Post by: madhead1987 on 03 September 2012, 16:14

Can you get Saab reds even if not gettin ko4 ? Can't find yellows anywhere ??