No rocket science required. 17v /14.2v = 1.197
Your 14.2 vdc pump will suck another 19.8% more current..when run on 17 vdc..at least on paper.
Good info, thanks.
Has anybody actually measured the V, right at the pump itself, with pump running normally ? If it's only like 11-12 vdc, increasing wire ga would be a big improvement.
We did not. The pump in question (Davies Craig EWP150) already had 12ga going to it. I did not set the V at the pump end of the harness though.
A bap would work...provided you don't get a huge V drop from undersized wire ga. Otherwise the increased current draw from the 17 vdc will be partially negated by the increased V drop from the oem small ga wire.
If I get to do this test I'll bump it to 10ga. I'm sure that will take care of business.
The Bosch /gt-500 pump will run all day at 14.4 vdc. I don't think it will burn up with another 19.8% more current flowing through it. It would be very easy to test..to see if the pump motor started cooking. What would be most interesting would be to measure increased actual flow rate, if any. I could see a 5 gpm pump increasing to 6 gpm with a 17vdc bap in use.
I'm not looking to over-spin the GT500/Bosch. But if I set up to over-spin the EWP150 I may as well do the GT500/Bosch at the same time. I also highly doubt that pump life would suffer that much either. Even if it gets cut in half it would still last forever in "play car" terms. And if they do burn up every 50K who cares, they're cheap.
As far as GPM increase we saw the GT500/Bosch go from 4.9 to 5.1gpm at 13.2 and 14.2v respectively. So not a huge jump. If you extrapolate that out you would be looking at about 5.7gpm at 17v. I don't think that little impeller is suited to being over-spun like some other pumps are.
On the other hand the EWP150 went from 7.5 to 8.5gpm at 13.2 and 14.2v respectively. Extrapolate that out and you could be looking at 11.5gpm. Now that would be cooking with gas.
The 13-14 GT-500 pump is supposed to be a substantial improvement over the 07-12 Bosch version.
It couldn't be worse! LOL! I would bet money it doesn't make more than 6.5gpm though. Things have to get flat out crazy to see the kind of improvements that are needed. The Lingenfelter gets the job done but that thing is the equivalent of a 13.5:1, 8,000rpm race motor.
That might make more sense vs a 07-12 pump + bap.
I'm not much interested in the OEM offerings. There is already stuff available that will outpace them. That said I would like to test a 13' GT500 pump so people can deal with actual facts, not speculation.
On paper, any 2 identical pumps plumbed in series, nose to tail should result in a higher flow rate with a given load restriction.
We did some goofing around with this. There were small improvements, but almost immeasurable. We didn't do a lot of goofing around though. I would like to do more, and maybe at some point I will. But really this was a IC test for us. That is the data we really wanted. The pump data was a bonus. We don't make pumps or sell pumps and probably never will. I posted this pump data as a "gift" for the board members so they can make better informed buying decisions. At the end of the day it doesn't matter to me what they buy/run though.