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| Bought halfcut, What fuel pump? https://www.ausmini.com/forums/viewtopic.php?f=23&t=20777 |
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| Author: | madmorrie [ Mon Jul 03, 2006 10:44 pm ] |
| Post subject: | Bought halfcut, What fuel pump? |
Hi Guys, Agreed to buy Starlet halfcut on ebay today. Going to get it on Saturday. Question is what sort of fuel pump are people running with the starlet motor? Going to keep it fairly stock initially, maybe just up the boost a bit. As I won't get the stock pump with it what is a good option? The fun will begin soon, will post pics when I learn how. The morrie is finally going to get whats coming to it... Cheers madmorrie 
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| Author: | miniza [ Mon Jul 03, 2006 11:18 pm ] |
| Post subject: | |
i'd go for one of the vl commodore fuel pumps, flow good, bulletproof bosch part and should look after you many years down the road whatever mods you gor for. a very overengineered pump! and its an inline pump too so you can install it on the subframe for example none of the stuffing about with intank pumps etc. |
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| Author: | borgy [ Tue Jul 04, 2006 10:14 am ] |
| Post subject: | |
VL bosch pump 1/2" in 1/4" out rated at 350 hp $170+ 910 bocsh pump 15mm in 12mm banjo out rated at 500hp $210+ i would recommend the 910 and both are aviable now off the shelf plus fittings and hoses....... Simon 0417 297 708 |
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| Author: | minstar [ Tue Jul 04, 2006 11:37 am ] |
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Yeah I had a Bosch 044 (500bhp rated?). Anyway that shat itself well the rust destroyed it and now I have a Pierberg rated to 500 bhp. Cheers Matt 
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| Author: | borgy [ Tue Jul 04, 2006 12:42 pm ] |
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yes it is very inportant that you dont suck crap thriugh these pumps as they are very accurate and cannot be stripped appart...... A $8 volvo filter infront of these pumps is what i would suggest........ May sound out of place but i have been using this set up for two years on a $100k drag bike that won this years ANDRA championship...... works a treat.......... 
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| Author: | minstar [ Tue Jul 04, 2006 1:51 pm ] |
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Borgy would that obviously be a low pressure filter before teh pump. Cheers Matt |
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| Author: | borgy [ Tue Jul 04, 2006 3:41 pm ] |
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yes thats right on the suction side but it is also important to put another filter on the pressure side so that you dont clog your injector filters..... |
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| Author: | Metalfab_101 [ Tue Jul 04, 2006 3:56 pm ] |
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Borgy, would you agree that these need plenty of fuel supplied? I was told that they are designed to be gravity fed and need a constant supply of fuel. On my setup I have 1/2" line from the tank, thru a 1/2" filter like Borgy described, then 1/2" line to the EFI pump, then 1/4" line to EFi filter, then 1/4" line to engine. |
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| Author: | borgy [ Tue Jul 04, 2006 7:17 pm ] |
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it all depends on the line of sight and head pressure on the hp pump.... on a road application where the fuel supply is only feeding an engine of lesser value then that of a race car then you might get away without having to fit a surge tank and lift pumps..... Some times it is personel prefference and other times it is just over engineering like my setup......there is no easy way of telling weather a fuel system needs lift pumps or surge tanks etc etc..... study the components and there mountings in the car and try to imagine every possible factor that may effect starving the engine of fuel......... good luck again 
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| Author: | minstar [ Tue Jul 04, 2006 7:31 pm ] |
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Metalfab, as stated I have a 500hp rated Pierberg and do have slight fuel starvation if I slam it around several roundabouts (plenty of those in Canberra!). The main problem is that the fuel outlet on the Mini tank is at the front exactly where you don't want it. The guy at InTune said that if the outlet was at the back then gravity/momentum would force the fuel under more pressure if the outlet was at the back obviously. Another trick if you don't want to put in a surge is to connect the return line into the feedline with a tee piece as the fuel obviously is coming back under much higher pressure. This is theory so Borgy etal might tell me I'm up the pole!
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| Author: | madmorrie [ Tue Jul 04, 2006 9:09 pm ] |
| Post subject: | |
ministar Wouldn't a tee-piece just equalise the pressure in the feed and return lines? Thanks for all the input guys. I assume the VL pump is a VL TURBO pump? Not just a run of the mill n/a VL? Can this be ordered from holden? Cheers madmorrie |
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| Author: | JC [ Tue Jul 04, 2006 10:06 pm ] |
| Post subject: | |
Just wonder down to your local wrecker and pick one up. Pump some 'cleansing fluid' through it before putting it anywhere near you car. For go fast bits look here .... http://ausrotary.dntinternet.com/forums ... um.php?f=6 and here http://www.austarletclub.com/forums/ind ... howforum=3 The Rotary forum is great for fueling bits and pieces. |
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| Author: | awdmoke [ Tue Jul 04, 2006 11:02 pm ] |
| Post subject: | |
The VL fuel filters are also big, cheap & available almost anywhere. I'm using one on the moke. Costs about $6 
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| Author: | minstar [ Wed Jul 05, 2006 12:26 pm ] |
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Madmorrie, theoretically you are plumbing the return line in front of the pump which theoretically you are sending fuel into the line at around 40-45psi which is obviously much higher than gravity. Yes you are right once the Fuel Reg opens up you would come close to equalising the pressure on either side of the pump. But that pressure would then be 45psi (or a proportion of that) which once again is better than gravity and would possible solve the fuel starvation issue. I guess I will suck it and see. Cheers Matt |
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| Author: | madmorrie [ Wed Jul 05, 2006 10:45 pm ] |
| Post subject: | in-tank fuel surge pot |
In an old edition of Zoom (before it turned to crap) the editor fitted a RB20 6 into an old Skyline. Instead of fitting an exterior surge tank he made up one that fitted inside the standard tank and used an in-tank pump. The theory should work with an external pump too. If I can find the mag i will scan it in but the design was like a 4inch tube mounted near the base with some small small holes around the bottom and the pickup in the centre so it stopped fuel flying away from the pickup when cornering. The tank return was arranged to fire straight into the pot to help keep it topped up with low fuel. Could be a good idea and keep the fuel system neat and tidy too. Cheers madmorrie |
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