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914World.com _ 914World Garage _ Best fuel pump for a 1911
Posted by: jesse7flying Jul 30 2018, 08:21 AM
When I bought my roller 71 project, it came with the original 1.7 (which had developed a knock) with D-jet, and a 1911 which had been run on carbs. Unfortunately, the carbs had been removed. I have sourced a set of Weber 40 IDF carbs from a World member and have gone through them to replace and clean up any suspect parts. I'm now in search of a low pressure fuel pump to mate up with the carbs. What options have you carb folks gone through and what seems to work well? I'm also curious to know if folks have used pressure regulators in their setups. Any particular recommendations? I would love to fire up the 1911 and see how it runs!
Thanks--Jesse.
BTW, I did a search and found a great thread on tuning the carbs, but not a lot on the pump used FWIW
Posted by: r_towle Jul 30 2018, 08:23 AM
Redline Webber (google that)
Get the Weber IDF tuning book (Amazon)
Www.aircooled.net has the best info, guides, and known good setups.
Use their data, and buy from them so they stick around!!!
Posted by: Mark Henry Jul 30 2018, 08:42 AM
Do you have the FI fuel pump?
PMO has a regulator that uses any fuel pump including the FI pump, only thing different is it has to run a return fuel line just like an 914 FI system.
http://www.patrickmotorsports.com/part/fuel-pressure-regulator-pmo-barbed-fittings/[s]
Posted by: jesse7flying Jul 30 2018, 02:54 PM
Thanks for the responses gents. I've got the book, in fact a couple of them and they've been very helpful. I have what appears to be the original three port fuel pump. Aside from cleaning up the grime, is there a way to test it without causing any damage to it? Ideally, I could use the current pump with a regulator to get me down to the target 2.5 psi needed for the catbs.
Posted by: GeorgeRud Jul 30 2018, 03:36 PM
I’d choose and mount a Pierburg low pressure pump down by the steering rack. Correct pressure and corrects any vapor lock issues at the same time.
Posted by: dr914@autoatlanta.com Jul 30 2018, 04:09 PM
the 3 lb faucet pump has always worked well, and they are very inexpensive
When I bought my roller 71 project, it came with the original 1.7 (which had developed a knock) with D-jet, and a 1911 which had been run on carbs. Unfortunately, the carbs had been removed. I have sourced a set of Weber 40 IDF carbs from a World member and have gone through them to replace and clean up any suspect parts. I'm now in search of a low pressure fuel pump to mate up with the carbs. What options have you carb folks gone through and what seems to work well? I'm also curious to know if folks have used pressure regulators in their setups. Any particular recommendations? I would love to fire up the 1911 and see how it runs!
Thanks--Jesse.
BTW, I did a search and found a great thread on tuning the carbs, but not a lot on the pump used FWIW
Posted by: Mark Henry Jul 30 2018, 10:08 PM
Thanks for the responses gents. I've got the book, in fact a couple of them and they've been very helpful. I have what appears to be the original three port fuel pump. Aside from cleaning up the grime, is there a way to test it without causing any damage to it? Ideally, I could use the current pump with a regulator to get me down to the target 2.5 psi needed for the catbs.
The PMO regulator, Aeromotive 13301, etc, a by-pass or return style regulator is the only way to use the stock FI pump.
Any 600+hp carb fuel system would be required use a by-pass fuel system, so no problem with lower power engines.
Because the fuel by-passes, therefore cool fuel circulating all the time, there should be no vapor lock issues.
3 to 4 psi for webers.
Most naysayers to a bypass system don't understand how a fuel pump works.
Only time you would run into issue would be a huge flow oversized pump that would need a 3/8" return line. I'm talking way more than what a stock pump flows, like 400+gph.
To test the pump it must have gas (never run dry), but you can just run a couple jumper wires to the pump.
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