fuel pump for nitrous

bones · Post by **bones** » Sat Feb 20, 2010 5:52 pm

Hi all, looking for a decent but cheapish fuel pump to supply the nos side. which is a fogger system??? all advice welcome

rich

gelmonkey · Post by **gelmonkey** » Sat Feb 20, 2010 6:41 pm

Rich
I think you will need a pump that gives you a maximum of 7psi when the solenoid is open.
Facet do a competition pump with this flow.
Perry will be able to give you a definative on this.
Cheers
P

mgbv8 · Post by **mgbv8** » Sat Feb 20, 2010 9:03 pm

As Paul say's Rich.
Any pump that will deliver a constant 5-9 psi will do you for your system.

The thing is "constant pressure" from launch to the finish line....

I use a holley red pump on mine via a regulator and bypass line.
The holley pump was ok when I was running small shots. But as I upped the power I found the bigger pump did not like being dead headed via the regulator and I got fluctuations in the fuel pressure on launch as the regulator struggled to keep up.

So I fitted a small tee piece in the petrol line just before the solenoids. I fitted a 2mm carb jet in the return connection and ran this line back to my tank.

Now when I arm the nitrous fuel pump it purges the line back to the tank and still maintains a steady 6psi at idle or full throttle.

bones · Post by **bones** » Sat Feb 20, 2010 9:12 pm

thanks for the replies guys, i will let my bruv know as this is for his motor

rich

topcatcustom · Post by **topcatcustom** » Sat Feb 20, 2010 9:32 pm

Pel, would it have helped if you used a holley type regulator with 2 outlets and piped 1 back to the tank? That way when the pump is ticking but solenoid still closed it still flows to keep the pressure steady- or still no good? If sounds ok it might be a solution for you Rich!

bones · Post by **bones** » Sun Feb 21, 2010 8:36 pm

how does this pump sound, webcom in-line, pump flow 92 to 130 litres an hour, 5.5 to 9.0 psi. using 5/16" feed pipe can the return pipe be smaller.???

rich

mgbv8 · Post by **mgbv8** » Sun Feb 21, 2010 8:44 pm

topcatproduction wrote:Pel, would it have helped if you used a holley type regulator with 2 outlets and piped 1 back to the tank? That way when the pump is ticking but solenoid still closed it still flows to keep the pressure steady- or still no good? If sounds ok it might be a solution for you Rich!

I wondered what the second tapping on the regulator was for Tom

Eliot · Post by **Eliot** » Mon Feb 22, 2010 7:01 am

mgbv8 wrote:So I fitted a small tee piece in the petrol line just before the solenoids. I fitted a 2mm carb jet in the return connection and ran this line back to my tank.
.

I used to do the same with the normal fuel feed for my carb - which ensured there was a constant supply of cool fuel to the carb.

bones · Post by **bones** » Mon Feb 22, 2010 11:03 pm

so how can i get a return line back to tank that hasnt got a return fitting, just a breather and overflow ??? on a sd1 tank and its got fuel in and i dont want to take tank out or drill holes in it. ???

rich

kiwicar · Post by **kiwicar** » Tue Feb 23, 2010 7:09 am

can you use a RR plastic in tank pump, it has teh return and overflow pipes in the top of the pump mounting bezzel. otherwise you will have to put one into the tank, which will be tank out ane either make one up to bolt in or electric braze one in, either way you will have to empty the tank and fill it with water (even drilling into a tank with petrol vapour in is very risky

Best regards
Mike

topcatcustom · Post by **topcatcustom** » Tue Feb 23, 2010 11:30 am

Stick an empty bucket in the boot with the return line going to that! Just remember to empty it back into the fuel tank every so often

bones · Post by **bones** » Tue Feb 23, 2010 1:20 pm

well it looks easier to fit a 2 gallon tank in for the fuel side of the nitrous instead, i better start looking for one i suppose

rich like this as its the only one with a feed at the bottom. http://cgi.ebay.co.uk/2-GALLON-ALLOY-FU ... 27a934ed4a .

mgbv8 · Post by **mgbv8** » Tue Feb 23, 2010 7:42 pm

This one would be better Rich!!

http://cgi.ebay.co.uk/ALLOY-FUEL-TANK-S ... 2a04fe2d54

bones · Post by **bones** » Tue Feb 23, 2010 8:12 pm

i did see that one Pel, but didnt want the feed at the top, thought it would be better at the bottom

rich

topcatcustom · Post by **topcatcustom** » Tue Feb 23, 2010 8:46 pm

Its easy enough to weld on another outlet Rich, you might get a better tank for less money