Harley Davidson

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1979custom
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Buell EFI for 2000 Sportster

Post by 1979custom »

I just bought the EFI setup from a '99 Buell S3 to put on my 2000 XL1200C. Got the complete intake, O2, Air temp, and head temp sensors with it. Just have to find a fuel pump and get an MS unit. I plan on putting MSnS-e housed underneath my luggage rack on the sissy bar. Any thoughts, comments, suggestions, etc.???
newtyres1
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Post by newtyres1 »

Yes, good on ya! Hope it turns out well. Have a couple of suggestions.

1. When you wire it all up, fit a small toggle switch that will supply power to the MS from either the switched ignition or directly from the battery via a small fuse. That way you can power up the MS without the ignition and headlight etc on to conserve battery power when you just want to load in a new msq or play with the settings etc.
2. Most people are using 2 squirts simultaneous for best power and smooth low-rpm running. I can email you my settings for an XB Buell as a starting point if you want, should be reasonably close (MSnS-E).
3. Buy a stim so you can test the MS, load the MSnS-E code and sort any issues before fitting MS to the bike.
4. Try to mount the MS so it can be easily removed if necessary.
5. Get hold of an old Palm (see the Palm forum on this site for compatible ones) and set it up with PalmTune and connect to the MS on the stim so you can learn how it all works. You will need this to tune the bike, unless you'd rather use a laptop? Buy or make up a mount for the Palm to attach it to the bike (LHS handlebar or mirror stem is a good place).
6. You'll need a WB O2 sensor installed in the exhaust to tune the bike properly. After that you can leave it in or remove it.

There's a hundred ways to skin a cat, this is how I eventually went about it on the Buell.

I was looking at some earlier posts in this thread, I think the MicroSquirt will require 2 sensors on the cam for H-D, each with just one trigger in the right spot. We will find out for sure very soon. I am about to start experimenting with an MLX90217 hall effect sensor on the rotor cup of a Buell engine. These sensors are TO92 size and may be adaptable for the larger Harley motors to run MicroSquirt. It is also very likely that the 36-1 crank sensor on the larger Harley motors would drive MSnS-E in oddfire mode with good dwell control, the conditions are that two coils would be needed and each coil would be firing every crank revolution, a bit like a wasted spark setup but not the same thing. Have a look at the MSnS-E "oddfire ignition support" thread for a bit more info.

Ian.
FIntruder
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Post by FIntruder »

I acquired a Buell Lightning throttle body with injectors, rail and TPS. The number on the injectors is 103501 01F008A 04191. It also has a symbol that looks like an "S" or an eye.
What is the flowrate of these injectors? I looked on a website but no numbers matched. I guess it would help if I knew who made them.
formerSlimJim
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Post by formerSlimJim »

Buells use a Bosch EV6 injector. There are two different types of connectors for these but I can't remember which name goes with which type so I am speculating when I say that they have the Jetronic connector. These are a Ford style injector if you are looking for a higher flow rate. I wish I had an interchange part number, flow rates, or something more to offer you but I don't. I do know that at 49psi these will flow enough fuel for a 1200cc motor that puts out 100 hp at the crank. Newtyres1 (above) and I have been working on some custom EFI for Buells so he may have the flowrate handy. If he doesn't, flow testing them may be the simplest way to get the info you want.
FIntruder
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Post by FIntruder »

My concern is that they are too big as I wanna use them on an engine that only makes about 70hp at the crank, maybe more since this throttle body is 45mm and the stock carbs are 36mm. I perused a table on a link from another thread but didn't see the injector number listed there.
The tip of the injector has 4 little holes or dots. Its black in color.
Thanks for your help.
newtyres1
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Post by newtyres1 »

I don't have any flow rates either. I wouldn't be too worried about them being too big at this stage, what engine are you going to fit it to?

Ian.
FIntruder
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Post by FIntruder »

A 1987 Suzuki 1400 Intruder, air-cooled sohc V-twin, made like 62hp and 84ftlb at the rear wheel at 4500rpm. Stock carbulators are 36mm Mikuni CV.
The TB I won on Ebay is from a 2000 Buell X1 Lightning. I hope to be able to modify the manifold to fit or may have to make one from scratch and just use the TB with TPS and injectors. Any idea where I can get fittings like they used to make the fuel supply/rail that clips on to each injector? Most likely I'll have to have some kinda independent fuel hose to each injector since they won't likely line up just right for a traditional fuel rail.
formerSlimJim
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Post by formerSlimJim »

The injectors should work just fine for what you are doing. I'm not aware of a source for individual fuel supply clips like what the Buell has. You could always remove the hold down bracket and cut the small metal line that runs between them, bore them out, and fab up a new line and hold down bracket once you get the new injector bungs located. It sounds to me like the manifold is going to be the fun part since the stock setup uses dual cv's.
newtyres1
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Post by newtyres1 »

Couldn't the fuel line fittings be sourced from Buell? I think the injector sizes will be a good match for your motor.

Ian.
FIntruder
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Post by FIntruder »

I'm glad to hear you think these may be in the ballpark as far as size. How low can I run the fuel pressure without effecting atomization? At idle with strong vacuum pulling on the FPR diaphragm, what does the fuel pressure drop to usually? I have a Mallory 4309 FPR. I ASSume I am supposed to connect a hose from the manifold to the fitting on the regulator so fuel pressure will drop with high vacuum like at idle or cruise.
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