OK... I know this has been done to death but...

I have searched on here and every other source/forum I can come across and yet i still cannot get a deffinative answer to a question that a LOT of perople must have faced!!!!
So please don't groan when you read the next bit - I know it's more repetative than the one about poly bushes but give it a go! and maybe if we get a deffinative answer it can become a sticky??


here Goes:

I have GSXR 750/1000 k2 throttle boddies. they are fitted with the standard injectors.

SO...

what is the flow rate of these? and are they high impedance?

I have found conflicting answers of 220, 240 and 270 for the flow rate (@3bar??) and no real answer on impedance...

I don't have any useful information like part numbers but here are some piccies:


Description

Description

Please only answer if you really do KNOW the answer.. the waters have been muddied enough already by people with only half a clue!

Cheers

[Edited on 20-2-08 by DaveFJ]

You don't say which size throttle bodies, are they from a 600, 750, or 1000cc bike?

The clue is in your avatar, I assume 1000cc !

[Edited on 20/2/08 by JohnN]

Well, the only way to resolve this is to find someone who has had one tested. My website quotes 270 for gsxr750 as that was the figure I dug out from somewhere or other on the web. My injectors run a 1.8 zetec using a 2.5bar regulator at about 85% max duty cycle, so should be fine on a 3bar regulator for a 2.0 zetec or similar.

They are definitely high impedance - my emerald ECU drives them directly with no issues.

[Edited on 20/2/08 by nre]

Ooops... corrected!

Are they KEIHIN ones? They are good for 190bhp and flowed well enough at 3bar for my 160hp Zetec.

The next upgrade is either S2000 or Blackbird injectors which I believe are pretty good upto around 350hpish

I think they are the same impedence as Zetec injectors.

Cheers,

Murray

600 GSXR are 230cc so should be higher than that.

I've managed to find a GSXR1000 workshop manual which should have this in it (I'm fitting the same tbs). I'll dig it out ( I think it's on my old laptop), and find the info for you.

Cheers


vince

I suspect it may be different for different vintages. Some of the Megasquirt firmware versions have a test mode so you can measure them yourself.

Have a look HERE for GSXR injector info

HTH

Neil

Only takes a few seconds to measure the impedance with a multimeter. Can't help with flow rate , sorry

DEFINATELY high impedance on the GSXR1000, I have used Flow Rate of 230cc/min in my calcs and it's mapped and racing now.