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PostPosted: Sat Apr 14, 2012 7:00 am 
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Joined: Sat Apr 14, 2012 6:32 am
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Location: CHAPARRAL NM
Hi I,m new to this Forum and curious if anybody can help me with my project I'm about to start. I have a wrecked 93 geo 3 cylinder 1.0 5 speed that I want to make a rear engine trike out of, I would like to know if it is possible to simplify the build by using a regular vacuum advance distributor and a regular carb so I could eliminate alot of wires and sensors to make the build a lot simpler


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PostPosted: Sat Apr 14, 2012 9:03 am 
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Location: sidney, nebraska
Well it is possible. I'm going to do the same thing. For the ignition you can use a couple different methods. The expensive route would be to use a full after market ignition. the cheap is to use a GM 4-pin HEI ignition module it plug rught in to the GEO distributor and will work just fine. But you have to make sure you heat sink the module or it WILL burn out prematurely.I connected a small 4-pin module to a spare dizzy hooked it up and gae it a spin and got bit. I f you need more info let me know.

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1990 geo metro 1.0 5 speed 3-door hatchback "herbie"
1990 geo metro 1.0 5 speed convertible "sportie"


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PostPosted: Sat Apr 14, 2012 11:52 am 
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Joined: Mon Mar 01, 2010 8:09 pm
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Location: ontario
Maybe a set of carbs from a 3cyl yamaha snowmobile could be made to work.


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PostPosted: Sat Apr 14, 2012 11:59 am 
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Location: End of days ranch Bouse az
i have a set of carbs from a 750 yamaha if needed

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PostPosted: Sun Apr 15, 2012 5:06 am 
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Joined: Sat Apr 14, 2012 6:32 am
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Location: CHAPARRAL NM
aqqus wrote:
Well it is possible. I'm going to do the same thing. For the ignition you can use a couple different methods. The expensive route would be to use a full after market ignition. the cheap is to use a GM 4-pin HEI ignition module it plug rught in to the GEO distributor and will work just fine. But you have to make sure you heat sink the module or it WILL burn out prematurely.I connected a small 4-pin module to a spare dizzy hooked it up and gae it a spin and got bit. I f you need more info let me know.


Sorry only experience I have is with older point systems What do you mean by (heat sinking the module)? also would I have to change any of the wires to the dist?


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PostPosted: Sun Apr 15, 2012 6:34 am 
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Location: sidney, nebraska
The only thing you have to do to the original distributor is remove the black "sleave" over the wires and twist them. The twisting helps prevent electrical noise. Its very simple to set up. Heat sinking is the process of using a plate and thermal transfer grease to draw the heat out of the module. Plus the mounting screws and plate will serve as a ground for the module. When you buy new modules they usually come with a small tube of thermal grease or you can get it seperate at most part stores or radio shack. I will try to get one set up and take some pics and give you a diagram.

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1990 geo metro 1.0 5 speed 3-door hatchback "herbie"
1990 geo metro 1.0 5 speed convertible "sportie"


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PostPosted: Sun Apr 15, 2012 9:19 am 
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Joined: Tue Oct 19, 2010 9:16 am
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Location: sidney, nebraska
I went out to garage and tinkered a little, so here we go.

parts.jpg[/attachment]Left to right, old coil, 1984 chevy 2.8 v6 dizzy, geo dizzy.

Attachment:
parts.jpg
parts.jpg [ 405.59 KIB | Viewed 2788 times ]


Attachment:
File comment: this yellow connector is where you will connect white connector from geo dizzy
chevy dizzy connector.jpg
chevy dizzy connector.jpg [ 354.27 KIB | Viewed 2788 times ]


Attachment:
File comment: here is the module. The lead on left will be reused/modified
module.jpg
module.jpg [ 355.69 KIB | Viewed 2788 times ]


Attachment:
File comment: I made mounting plate out af aluminum. Use plenty thermal transfer grease. Bolt to location in reach of dizzy lead. The aluminum plated will dispers the heat, provide ground path and mount
module plate 4.jpg
module plate 4.jpg [ 330.43 KIB | Viewed 2788 times ]


Attachment:
File comment: connect geo dizzy to right side of module marked "P" "N"
module with goe dizzy.jpg
module with goe dizzy.jpg [ 371.26 KIB | Viewed 2788 times ]


Attachment:
File comment: The left side is marked "+" and "C". The "+" or pink wire connects to coil "+" and 12 volt switched power. The "C" or brown wire connects to coil "-".
complete system.jpg
complete system.jpg [ 382.77 KIB | Viewed 2788 times ]


This does work. In fact you can use a Ford Duraspark module also but it is much larger. The one I used is 84 chevy 2.8l v6 s-10 blazer (just what I had laying around) but is very common and universal. Autozone part number DR127. cost $30.00.

You might think about a volkswagon carb rejetted on an adaptor. One carb is easier to set than 3.


Attachments:
File comment: very carefully remove the black cover over wiring, avoid nicking wires
geo dizzy.jpg
geo dizzy.jpg [ 372.72 KIB | Viewed 2788 times ]
File comment: twist leads
twisted leads.jpg
twisted leads.jpg [ 358.33 KIB | Viewed 2788 times ]

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"If you think education is expensive, try ignorance." - Derek Bok


1990 geo metro 1.0 5 speed 3-door hatchback "herbie"
1990 geo metro 1.0 5 speed convertible "sportie"
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PostPosted: Sun Apr 15, 2012 2:26 pm 
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Joined: Sat Apr 14, 2012 6:32 am
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Location: CHAPARRAL NM
Thanks that's alot of help!!! I'm kind of a dummy when it comes to the electrical part only one question were do I apply the thermal grease? carbs and jetting is not a problem thats one of my strong points
when I get paid on the first I'll pick up a module and a coil and hook them up the car is still drivable it just happens to be a convertible noticed you have one. I'm going to part out whats left when I get through the top is pretty much trashed out. it also just so happens I have a chevy fwd 2.8 computer engine I'm going to do the same thing get a older dizzy put a carb on and build a trike out of it later on


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PostPosted: Sun Apr 15, 2012 5:00 pm 
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Joined: Mon Nov 23, 2009 12:37 am
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CHOPPERKZ wrote:
Thanks that's alot of help!!! I'm kind of a dummy when it comes to the electrical part only one question were do I apply the thermal grease? carbs and jetting is not a problem thats one of my strong points
when I get paid on the first I'll pick up a module and a coil and hook them up the car is still drivable it just happens to be a convertible noticed you have one. I'm going to part out whats left when I get through the top is pretty much trashed out. it also just so happens I have a chevy fwd 2.8 computer engine I'm going to do the same thing get a older dizzy put a carb on and build a trike out of it later on


you apply thermal grease on the metal part on the rear face of the spark module. It is meant to be a sandwhich between the module and the aluminum block, which acts as a heatsink. in fact you can ask for a small 5g tube of 'thermal paste' from any computer shop. Apply in a thin layer with a flat razor. Wear gloves and don't get it on your shirt.

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PostPosted: Sun Apr 15, 2012 6:57 pm 
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Joined: Tue Oct 19, 2010 9:16 am
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Location: sidney, nebraska
Like silverbullet said put the thermal paste/grease on the metal plate on the back of module. And yes I could use a lot of vert parts so just let me know when your ready to strip.

What are you using for tranny are you going to use? The metro 5 speed will have the shift linkage on the wrong side unless you use a cable shift.

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"If you think education is expensive, try ignorance." - Derek Bok


1990 geo metro 1.0 5 speed 3-door hatchback "herbie"
1990 geo metro 1.0 5 speed convertible "sportie"


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PostPosted: Sun Apr 15, 2012 10:50 pm 
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Joined: Sat Apr 14, 2012 6:32 am
Posts: 5
Location: CHAPARRAL NM
I'm going to use the 5 speed haven't figured out how I'm going to do the shifter yet I might copy the semi cabovers I've seen them with linkage and cable shift.
Let me know what parts you might need I'm going to keep all the drivetrain e-brake rear suspension and hubs, dash I have another geo hatchback that I drive so whatever parts that will fit my hatchback. Right front fender and rear bumper is trashed hood has repairs.


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PostPosted: Thu Apr 19, 2012 4:49 pm 
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Joined: Tue Oct 19, 2010 9:16 am
Posts: 412
Location: sidney, nebraska
I will be needing all three mirrors with all trims and screws and a few other parts. I will get a list together and pm you later.

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"If you think education is expensive, try ignorance." - Derek Bok


1990 geo metro 1.0 5 speed 3-door hatchback "herbie"
1990 geo metro 1.0 5 speed convertible "sportie"


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