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Fuel system question for you EFI guys

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I'm looking at some EFi systems for my m10 finally, but Im going through to replace all my fuel system components from my current 5 psi weber electric fuel pump, to the hosing and such.

Question is-- what sort of fuel pump are you guys running? Any particular brands? Its totally dependant on what pressure is needed by the efi and such, but I wanted to see who has what to get some ideas.

thanks!

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Guest Anonymous

you are quite right about some systems needing other pressures. MOST dont have a pressure setup at the engine so you need high pressure system. At the shop we use the e30 fuel pumps in the tank of the 02. you want to use the later setup that doesnt require a prepump (single main I think its a 90 325i but double check I dont have my books with me). you have to new lines as the stocker 02 system will explode due to the pressure. As for systems we are fans of the 318i setup, its rock solid and VERY reliable. They can fuel a full range of pistons and cams and parts are easy to get. Figure 200-400 for a used setup and rock and roll.

Sam

Lavale's Import Restorations

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yeah, I thought about a stock system. Can't beat the price. The 318i might work, but how about for ITB injection, or is it TBI?

Interesting that you brought up the 325 intank fuel pump....never thought of that. I was going to hardline the system also, so my stock vinyl hose is outta there. Time to sort through the summit/atl catalog for all those fittings!!

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not sure if true but.. ive heard of racers having starvation problems with the in-tank because the 02 tank is unbaffled. it makes more sense performance wise i guess then to use a pre-pump and reservoir. me myself, i just used a 318is in-tank and havent had a problem yet. but ive never ran the tank below half-ways.

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i'm also in the process of rounding up parts for an ITB EFI setup as well. My thought was to get a decent high pressure pump (now i'll probably get the e30 like sam said) and run an adjustable fuel pressure regulator. I think that the (could be wrong) e30 in tank pump is slightly short but has a provision for a fuel warning light. good news is you know when you are going to run out of gas - bad news is that when the light turns on (you have to install a light in the dash) you'll still have 1/4 to 1/3 of a tank left.

share what system you end up going with and what pump you choose. (I'm thinking about megasquirt or SDS EFI with an ITB setup from Jenvy)

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Definetly,

I was leaning towards electromotive but am looking at 034efi.com's system. They are local and provide good support and its a sequential system with DFI. I had the SDS on my 240, and it was running about 50psi from an external beefy pump. Im in contact with a person at 034 right now, so once I get in touch with some specs, I'll let y'all know.

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I used a 318i pump (external) along with an early E30 in tank pre-pump/level indicator. The in tank pre-pump is the correct length which reaches to the bottom of the tank (and it also includes the fuel light connection which I wired up). This setup has worked for the past 8 years without an issue.

Check my writeup in the FAQ on this subject for more info.

http://www.bmw2002faq.com/content/view/16/32/[/url]

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034efi is a good system. Helped a friend who is a good friend of the ecu developer partially tune one on a blowered flathead Ford engine. The Audi guys are big on it.

Same unit is sold by Redline and Panteraefi. (The developer has Pantera. He also worked for Electromotive for 11 years and broke off on his own.)

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