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Mikuni Carbs from an R1  Rating:  Rating
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 Posted: 12-08-2010 02:33 am
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StevenD57
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As for runner length I suggest you go read the following article:

http://77e21.info/mstunedintake.htm

It talks about directly measured results with short (9 inches) verses long runner lengths (19 inches). Since the 2.0L Lotus 907 motor does not develop much low end torque, I am definitely planning on adding some longer runners and venturi horns to my EFI setup.

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 Posted: 12-08-2010 02:35 am
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superk83
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Steven, I'd love that pdf...

suprakkmp@yahoo.com


Kurt,


Electronic ignition has come a long way thanks to the fellas at DIY autotune(not a plug, just sayin...) You can get the Megajolt ignition-only controller for $165 and the Ford bits from the junk yard(and ebay) for less than $60. The carbs I picked up on eBay really cheap... Guys seem to be swapping these out for EFI setups on the R1 and other Yamaha liter bikes. Finding these parts so cheap are what motivated me to move ahead with the engine purchase... A friend had been hanging it out in front of me for a while and finally, the price was right...lol!

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 Posted: 12-08-2010 02:53 am
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superk83
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Thanks for the email, Steve... I'll read over it on lunch...

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 Posted: 12-08-2010 02:55 am
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StevenD57
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Yeah, from a cheap junk-yard near here I think I paid less than $40 for all of my EDIS bits. This includes the toothed wheel, VR sensor, 4-cyl coil pack, and the 4-cyl EDIS ignition module.

I used the toothed wheel from a 1996-1997 Ford Taurus GL with the pushrod 6-cylinder V6. I found the quad cam Duratec motors had a completely different crank pulley arrangement so do not bother looking on those.

The VR sensor also came off of the Taurus but the same sensor is used on a LOT of the mid-1990's Ford.

The coil pack and EDIS4 module came from a Ford Escort or Mercury Tracer with the SOHC 1.9L engine. The Autosport Labs site (vendor for the Megajolt ECU) says 1990 to 1999. The same 4-cyl coil pack is used on the V8 engines though. The V8 engines just have two of them.

BTW, I ordered the plug wires from Rockauto.com for a 4-cyl Ford Escort with the 1.9L because they were dirt cheap too. I think the new plug wire set was $12 plus shipping. But if I had to do it again I would order the 6-cyl plug wire set for the Ford Taurus because the Escort wires were kind of short. This meant I was limited in how far away I could mount the coil pack. If I would have used the 6-cyl Taurus wire set I would have had longer wires to work with. It turns out the 6cyl wires were only $16 to $18 so the cost difference was not that much.

Another option I am still researching is to use the coil pack off of a 4-cyl Dodge Neon. The Neon coil pack has more normal plug wire connection when compared to the Ford EDIS coil packs. I know for a fact that the people doing EDIS conversions on 6-cyl cars have used Dodge coil packs for the same reason so I am guessing the Neon coil packs would work too. I just have to check the primary & secondary resistance to see if the Neon coil packs are compatible with the EDIS Ford coil pack values.

Last edited on 12-08-2010 03:01 am by StevenD57

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 Posted: 12-08-2010 09:13 pm
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superk83
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Great write up on the install, Steve!!! I do have a question regarding the wiring... What does it mean to have a shield on the wiring... From the diagrams, it looks like there's a 3rd wire looping around the main wires back to the edis module and grounded out? I'm more than likely wrong, I'm not quite in to circuits yet in my studies... Any chance I could get a template for that mounting bracket? A friend of mine owns a machine shop and would make short work of chopping a couple of those out.

Regarding the coils, could GM ignition coils work as well as the Dodge bits? I've incredibly easy access to a few Saturns...

Thanks for all the info and advice, I really appreciate it!!!

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 Posted: 12-08-2010 09:16 pm
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JodyKerr
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http://en.wikipedia.org/wiki/Shielded_cable

 

Shielded cable keeps the wiring from picking up interference.

 

Jody

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 Posted: 12-09-2010 10:40 am
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superk83
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Awesome, Jody! Thanks for the reference... I don't know if any of you have seen the classified on here today or not, but there is a FREE, COMPLETE Jensen up in Toledo right now...!!!!

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 Posted: 01-21-2011 01:44 pm
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superk83
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So my first set of carbs were a bit of a bust...lol! Turns out they're slightly more incomplete than I thought at first...

Monday, a chap on the locost forum posted a set of R1 carbs for sale from his local craigslist... He picked 'em up for me, gave me a break down on the bits:

throttle position sensor

kickstand/switch

exup valve actuator and guts(used to build back pressure in the exhaust system at low rpm...)

a small fuse block,

fuel pump/filter,

starter relay,

tilt switch,

igniter,

and complete wiring harness...!

Cost? $50... off of a recently laid over R1...

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 Posted: 01-21-2011 02:30 pm
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StevenD57
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I don't know what a kickstand switch, or a tilt switch or an igniter are going to do for you but you also have to be aware that the throttle position sensor has to be a potentiometer type. Some throttle position sensors only indicate when WOT is reached or perhaps when the throttle is closed so if it is this type then it is useless. The TPS you need has to be one where there is a variable resistance that changes as the throttle is opened or closed. Typically they have three wires, ground ref, signal out, and 5v supply voltage.

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 Posted: 01-21-2011 03:20 pm
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superk83
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The value in the other electro bits is in resale... I believe the tps is a potentiometer but will be doing some more research on p/'s as soon as parts are in hand...

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 Posted: 09-12-2011 03:13 pm
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superk83
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Little update...r1 carbs do have the potentiometer type tps, but ate spaced a little too close together... I'm having a look at Suzuki gsx-r carbs... seem to have better spacing, same size availability and potentiometer type tps...

Project has stalled due to focusing on my real estate license, will keep ya updated!

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