Delphi T 11 Fuel pump

[toon2]

Does anyone have a source for purchasing this pump or something similar?

I'm looking for an inline pump with very low current draw and a minimum of 30psi.

Thanks, Keith

[EWflyer]

My project is a Kawasaki EX-250 motorcycle which has a very limited electrical system, so I feel your pain when it comes to needing a small, very low current draw pump. After much searching I settled on the fuel pump from the Suzuki LT-R450 Quadracer.

The Quadracer pump is an interesting little item. It has the lowest current draw of anything I could find. It is a small, external-mounted (i.e. not an in-tank) pump contained within a fuel-filled aluminum housing, so in that respect it's a lot like today's typical in tank pumps. It puts out about 50psi, or I should say that mine currently puts out about 50psi.

What I mean by that little disclaimer is this: I learned during my fuel pump search that fuel pump designers address the output PSI issue with the understanding that during the life of a pump (as it's parts wear) there will be some deterioration in its ability to deliver pressure. So on a given motorcycle or car application they'll specify a pump that starts out (brand-new) producing well over the needed pressure and they make an engineering prediction that the wear-induced pressure output decrease during the expected lifespan of the vehicle won't be enough to drop it below the intended/needed system operating pressure.

You can find plenty of used LT-R450 fuel pumps for sale on Ebay. That's where I found mine.

Here's a picture of the LT-R450 Quadracer pump, sorry there's nothing in the picture to give you a visual reference as far as it's size is concerned, but the whole thing will fit in the palm of your hand. Also, I've never taken mine apart to look at the actual pump inside of it, but it has to be a very small unit in there. I wouldn't be at all surprised to find out it contains of of those little Delphi T-11 Small Engine fuel pumps you're looking for.



Because the LT-R450 Quadracer pump is an external unit there's also an externally mounded fuel pressure regulator. I also used one of those in my project. Here's a picture of the LT-R450 Quadracer fuel pressure regulator (they reduce to 42psi).



Good luck with your project.

[toon2]

Thanks, Thats some great info. I am doing a FI conversion on a twin cylinder 992cc generac engine( think BIG briggs and stratton).

By chance, have you ever checked or found the specs. on the current draw of that pump?

Keith

[EWflyer]

So you're working on a backup power generator? Or is it an alternate use of a generac engine, is it in a vehicle of some sort?

No, I don't know the current draw of the pump, but it's very low.

I've got a Datel voltmeter installed on my bike's instrument cluster to monitor the electrical system. Before the entire fuel injection installation it used to show about 13.5 to 13.9 volts at engine idle speed (fully warmed up engine). After the fuel injection system installation the voltmeter now shows about 12.5 to 12.8 at engine idle speed (fully warmed up engine). I'm considering that a victory. I've got everything up and running and I didn't go "over budget" on the bike's charging system.

I guess I could hook up my multimeter to the pump while it's running to get that current draw reading for you. Only problem is I'm not actively working on the project right now, the weather is lousy here in Spokane and family and job needs are time-crunching me a bit. Thank goodness the holidays are over now and I'm beginning to get back to my normal life. I'll keep it in mind when I get to start back to work on my bike, but I have to say that this pump is probably about the best you'll find with respect to current draw.

I did find a fuel flow amount for the pump (I've got a PDF version of the LT-R450 maintenance manual). It will flow 498ml/minute (with no pressure load). Couldn't find any mention of the pump's current draw anywhere in the manual.

[toon2]

I wonder if it's the same pump Suzuki uses on other bikes? I was not able to find the pump for the LT -r450 on ebay right now but I found some other inline Suzuki M/C pumps, I'll do some digging.

This engine is for a huning boat. The engine drives a lower unit that is made for trashing through mud and weeds.

I've had the FI conversion on the "to do" list for awhile(two years) but am just now getting around to it. It will benefit greatly with an FI system. Timing advance and fuel mapping should get me in the 40hp range and make the engine MUCH more efficiant.

[EWflyer]

Yeah, that would make sense for the pump to be a Suzuki "parts bin" item. Buying in volume and using the same pump in multiple applications both in-tank and externally as in the LT-R450.

Wow, no LT-R450 fuel pumps available on Ebay? When I was looking they were easy to find. That's surprising.

[Matt Cramer]

Does anyone have a source for purchasing this pump or something similar?

I'm looking for an inline pump with very low current draw and a minimum of 30psi.

Thanks, Keith

Delphi refuses to sell them to anyone except OEMs.

We've been pondering how to twist their definition of OEM enough to qualify.

[toon2]

I called Delphi yesterday but never heard back. If they only seel to OEM, that's problably why.

[toon2]

I spoke with a rep. at Delphi today. He offered VERY limited info on this pump.

He said it was used on a scooter that was made or sold in India. He did not know a model number of make of the scooter.

It's a shame that they do not offer to the pulic. They make alot of parts that are perfect for small engine retrofits.

[mxrob]

For those of you considering using the Suzuki LT-R450 fuel pump I have info posted on my DR650 Dual Sport FI project over on Thumpertalk. The data you are looking for is on post #87. http://www.thumpertalk.com/forum/showpo ... ostcount=1