Cosworth Injectors
Turbo Mini Forums

So most people have heard of the Cosworth injectors being referred to by colour, blue injectors, yellow injectors, grey injectors etc etc

From my dad messing with them quite a few years ago I can remember that grey ones are the large flow injectors for high boost applications.

But does anyone know what the standard injector colour (and flow rate?) is?

Colour Name / code Flow Rate

Yellow Standard for 2WD/3 Door 311cc / min
Dark Blue Standard on 4WD 325cc / min
Dark Green 803 382cc / min
Light Blue 400 437cc / min
Dark Grey 403 503cc / min

Si

But part numbers are best to go of. If you have them.

Edited by Si P on 6th Mar, 2008.

I drill holes in everything..!

Thats great, I spent ages searching on Google trying to find that info.

That’s from an old Cosworth chart I had.
Please use as a guide only.

Part numbers are more important than colour Tom.

Due to ford and Bosch messing about with colours. Some same colour injectors flow more - some less but same colour. But part number different.!

Hence the reason I ask if you have the part numbers?

I hope that makes sense.

Si

I drill holes in everything..!

I don't yet, TBH I'm looking for some 300cc-ish injectors for a possible project, and it struck me that with all the Cossie boys upgrading, there must be plenty of standard ones to be had for little ££.

yellows were standard in 3dr and 2wd sapp's the blues were standard in the 4x4

All the injectors are also old-school technology...

You'll find that injectors off any car over 2litres, made in the last 8 years of so (ie fully sequential) will be of a 300cc+ flow rating, and have a far superior response.

Even the mini MPi had 460cc units. :)

Not sure Id agree with you Dave.

Even a Nissan 200sx turbo, only has 280cc injectors.
Id be very surprised if most n/a engines used injectors even close to 300cc....why on earth would they ???

Tom, Im fairly sure I have some 4x4 dark blues here. All the Cossie injectors are low impedance too.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Becuase if they are fully sequential - not semi-sequential, then they only have a 'theoretical' 180 crank degrees to get all the fuel in...

In theory yes....but pretty sure its rare this actually happens.....although I dont know to be honest.

here is some injector info

http://users.erols.com/srweiss/tableifc.htm

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

i thought at one time that the sequentialnosity of the engines only lasted till mid range than became batch , dont know if thats true or ever was though.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Hi,
That would be a cheap way for manufacturer to get the emissions down and use smaller injectors....
Cheers,
Gavin :)

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