Gtr Pump Amps

[GTR32]

Does anyone happen know how much current an R32 GTR pump draws @ full noise? Looked in the Nissan workshop manual but can't find a spec.

Thanks

[DAN00H]

only way I can think of is to actually test it. you might get lucky doing a google search - some times the american sites have stuff like that.

[Sydneykid]

Does anyone happen know how much current an R32 GTR pump draws @ full noise? Looked in the Nissan workshop manual but can't find a spec.

Thanks

Hi GTR32, easy question, not so simple answer. The current actually varies according to the fuel pressure. Of course the fuel pressure varies with the amount of boost.

So I have a little rule of thumb, that the electronics guru's will no doubt tell me is wrong, but it has worked for me so far. The standard GTR pumps is rated at 190 litres per hour, and I say that's about 190 watts of power. Divide that by 14 volts and you end up at 13.5 amps. Walbro rate their 190 litre per hour pump at 12.5 amps max current, so the "rule of thumb" is not too bad.

When we use a Bosch 044 rated at 330 litres per hour, divided by 14 = 24 amps. So I use a 30 amp fuse, relay and appropriately rated wiring.

Hope that helps

[Merli]

So current draw is linked directly to flow capacity of the pump?? Interesting!

[GTR32]

Hi GTR32, easy question, not so simple answer.  The current actually varies according to the fuel pressure.  Of course the fuel pressure varies with the amount of boost.

So I have a little rule of thumb, that the electronics guru's will no doubt tell me is wrong, but it has worked for me so far.  The standard GTR pumps is rated at  190 litres per hour, and I say that's about 190 watts of power.  Divide that by 14 volts and you end up at 13.5 amps.  Walbro rate their 190 litre per hour pump at 12.5 amps max current, so the "rule of thumb" is not too bad.

When we use a Bosch 044 rated at 330 litres per hour, divided by 14 = 24 amps.  So I use a 30 amp fuse, relay and appropriately rated wiring.

Hope that helps

If only the answers were simple. But then we wouldn't want to engage in the masochistic pastime of messing with cars would we? Heh heh.

How is the relationship between pressure and current established? I thought that (apart from the low voltage idle of Skyline pumps) once a pump was connected to 12v DC it ran at a constant rate, simply with less fuel returned as demand under boost and therefore pressure increased. Might have exposed my ignorance here!

Your rule of thumb seems to work pretty darn well, with some overhead for safety. Bosch rate the 044 @ 15.5 amps and the 'others' at 10.5.