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fuel pump for nitrous
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bones
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PostPosted: Sat Feb 20, 2010 5:52 pm    Post subject: fuel pump for nitrous Reply with quote

Hi all, looking for a decent but cheapish fuel pump to supply the nos side. which is a fogger system??? all advice welcome Very Happy rich
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gelmonkey
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PostPosted: Sat Feb 20, 2010 6:41 pm    Post subject: Reply with quote

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
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mgbv8
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PostPosted: Sat Feb 20, 2010 9:03 pm    Post subject: Reply with quote

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.
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Perry Stephenson
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9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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bones
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PostPosted: Sat Feb 20, 2010 9:12 pm    Post subject: Reply with quote

thanks for the replies guys, i will let my bruv know as this is for his motor Smile rich
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topcatcustom
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PostPosted: Sat Feb 20, 2010 9:32 pm    Post subject: Reply with quote

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!
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bones
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PostPosted: Sun Feb 21, 2010 8:36 pm    Post subject: Reply with quote

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.??? Smile rich
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mgbv8
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PostPosted: Sun Feb 21, 2010 8:44 pm    Post subject: Reply with quote

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 Laughing
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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Eliot
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PostPosted: Mon Feb 22, 2010 7:01 am    Post subject: Reply with quote

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.
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bones
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PostPosted: Mon Feb 22, 2010 11:03 pm    Post subject: Reply with quote

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. ??? Confused rich
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kiwicar
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PostPosted: Tue Feb 23, 2010 7:09 am    Post subject: Reply with quote

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 Shocked
Best regards
Mike
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topcatcustom
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PostPosted: Tue Feb 23, 2010 11:30 am    Post subject: Reply with quote

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 Laughing
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bones
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PostPosted: Tue Feb 23, 2010 1:20 pm    Post subject: Reply with quote

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 Sad rich like this as its the only one with a feed at the bottom. http://cgi.ebay.co.uk/2-GALLON-ALLOY-FUEL-TANK-KIT-CAR-RACE-RALLY_W0QQitemZ170342542666QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item27a934ed4a .
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mgbv8
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PostPosted: Tue Feb 23, 2010 7:42 pm    Post subject: Reply with quote

This one would be better Rich!!

http://cgi.ebay.co.uk/ALLOY-FUEL-TANK-STOCK-HOT-ROD-RACE-AUTOGRASS-PETROL_W0QQitemZ180472393044QQcmdZViewItemQQptZUK_Cars_Parts_Vehicles_Other_Vehicle_Parts_Accessories_ET?hash=item2a04fe2d54
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Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw

https://www.youtube.com/watch?v=eg3avnsNKrc&index=2&list=FLqIlXfSAoiZ--GyG4tfRrjw
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bones
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PostPosted: Tue Feb 23, 2010 8:12 pm    Post subject: Reply with quote

i did see that one Pel, but didnt want the feed at the top, thought it would be better at the bottom Smile rich
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topcatcustom
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PostPosted: Tue Feb 23, 2010 8:46 pm    Post subject: Reply with quote

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