I've put one of these pumps and matching throttle bodies on my engine.

More recently I added staged injection.

I am now running at a flow rate that is equivalent to 100% on the original injectors, so I am starting to wonder whether the fuel pump is up to the job.

I also noted that the Busa of the same year uses the same injectors, but a different pump. Those Suzuki boys don't normally change parts for the sake of it so presumably the gsxr1000 pump is inadequate for the busa.

Anyway, I am rambling. Anyone got any idea of the limits of this pump?

Matt

Usually, the difference between pumps is not to do with pump capacity but with fitment to the tank. as far as i am aware there is no difference in pump volume as they all run the same pressure.
the old Hayabusa however used to run an external pump which was unregulated with a return to the tank. the later Busa runs an in tank item.
for your interest, I run a GSX R1000K7 fuel pump on a 1340 Megabusa and have no problem at all.

thanks for the reply.

I was looking at the 2002 model years. They all fit in the tank in that year. All the injectors are the same.

A little more hunting (downloading workshop manuals) turns up

168ml/10s (1.008 litres/min) from the early gsxr1000 pumps (k5-6)

220ml/10s from the k7-k8 (1.320litres/min)

222ml/10s (1.332litres/min) from the later k9 gsxr1000 pump.

The big increase corresponds to the arrival of secondary injection in these bikes.


Then I found the k1-3 manual, and it claims 1.2litres/30seconds (or 2.4litres/min). I don't know what to think, but they have a typo in the units (for the oz vs quarts) so I am suspect of this number.



If I run 270cc/min injectors (supposedly the standard gsxr k1-k3 injectors although some claim 240cc/min) at 100% then this would be 1.080litre/min.

Your later k7 pump sounds good. Do you log the AFR, or just look at the plugs?

Matt