matt_gsxr
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| posted on 28/6/10 at 07:01 PM |
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gsxr1000 k1-k3 fuel pump capacity?
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
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cosmick
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| posted on 28/6/10 at 08:31 PM |
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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.
If it can't be fixed with a hammer then its probably an electrical problem.
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matt_gsxr
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| posted on 28/6/10 at 09:29 PM |
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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
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