Arachnid Build, ... or is it! (Highly Modified)

[The_Machine]

https://www.surpluscenter.com/item.asp?item=1-3470&catname= for 20 bucks bill, we need to find a way to use these.

http://cgi.ebay.com/ebaymotors/1979...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories check these babies out.

 

[Bill CNC]

I sure like those $20.00 ones. The price is excellent to say the least.

These are the ones I was eyeballing for $60.00 each.

I would then use the front steering knuckles and modify them or make an adapter to mount them to the A-arms.

If I went with the $20.00 parts, ... how will they be mounted to the hub? With the Metro shafts, I could use the disc brake rotors and that would also give me front disc brakes.

The wheels might be a problem, although I haven't checked whats available for kart parts. The Metro wheel bolt pattern is 4 X 4.5 or also known as 4 X 114MM.

Have you a plan?

Bill

 

[theo]

Are they the same shafts as the GM Cavalier? What are you using for a engine?

 

[Bill CNC]

Theo,

I am not 100% sure, but I believe so. It is an A body GM part. I would be using (2) drivers side half shafts if I went this route. They are the short ones, the long ones are on the passenger-side (engine on the passenger-side and transmission on the driver side).

As for the engine, I am trying to work out a couple of deals. I am not sure which one I want. One is an older Yamaha TT500 engine that's air cooled for $around $250.00. and the other is a Triumph 955i for just under $1,000. with all the electronics.

TT500 has lots of torque but it's air cooled. They spec at around 30hp at 5,800 rpm and 38.2 Nm @ 5400 RPM. The 955i, is also a torque monster and water cooled, but it is heavier, but it has 149hp at 10,700 rpm and100 N·m (73.8 lb·ft) @ 8200 rpm.

 

[theo]

On my buggy I used the short axle from a cavalier and with this there is little machining. I'm using 1" shafting for the center section but I'm also using a smaller engine. I would say that your spindles are to light for either of those enignes.

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[Bill CNC]

What machining was involved and what is that hub you have on their.

It looks like something that could work. I don't think the engine size is of any importance for the half shafts. My Metro is a 1.3L and I couldn't harm them in any way if I tried, although, ... I will go with a 1.250" center section.

What size engine are you going with?

 

[theo]

The axles are ok it' the center section I'm meaning it's 1" with a 1/4" key way.

The hub is Cavalier, easy to work with. You have to lath off the wheel flange, because finding a rim to fit I found hard to do. They are front wheel drive and the rims are reversed. I used a 4 bolt 4" center flange.

On the inner CV I machined off the female spline and welded on a weldable 1" hub

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The outer.

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[The_Machine]

holy ****. use the tt500. it'll be plenty of power

 

[Bill CNC]

Theo,

Do you have a picture of just the half shaft so I can see both ends?

 

[Bill CNC]

holy ****. use the tt500. it'll be plenty of power

Whats wrong, the 955i seems a bit much? The only thing I dont like about the TT is it being air cooled. I had a TT and I know the fun it will provide, but I want a bit more than the average go kart. I want some FUN!

 

[fowler]

i think the tt will be best
the 955i is realy too big
i mean modelengineer put 600cc (or was it 500cc) on his sidewinder and that is a bit bigger than this
also by the look of the ads on the site it is designed for a 10hp industrial motor
so 30 hp will be great on that and well 149 will just rip it apart

 

[The_Machine]

yeah, buy both engines, just save the other for your next project

 

[fowler]

i like your thinking

 

[r97]

im on vacation and missed much of pages 5,6, but couldent bill youse his fancy lathe and machene a key into the shaft of the cv axles, just a guesse

 

[The_Machine]

with that much power i'd be scared to even use anything but a splined shaft, well, the 900 anyway

 

[Bill CNC]

Hi Guy's,

A mechanic friend of mine gave me the idea to use a differential from a car to use for the rear drive to go along with using CV halfshafts.

Last night, he gave me a small differential from a 1985 Toyota Tercel. I think it might be possible to use this, if I can find a sprocket to fit on this, or if I can find a sprocket that hasn't been drilled and do the drilling myself for the center boar and the bolt holes. I would also need to weld all the spider gears together to lock it up like a spool and swap out the beveled bearings with regular sealed bearings.

I can use the stock CV, that match the car and I should be good all the way to the mounts on the ends of the A-arms. At that point, I might do something like "The_Machine" has done in the above photos. I can also take full advantage of the splines on the shaft and on the inside of the differential.

Here are a couple of pictures of the Differential. To get some scale perspective, the outer ring diameter is 5.345".

 

[The_Machine]

i believe you're talking about Theo, I've never utilized splined anything.

Nice grab. how many splines?

 

[Bill CNC]

Machine, ...

Nope, I got it right, ... It was you I was replying to in post #135. This part was coupled to a 1.5L engine so it will definitely be strong enough for what ever I power plant put in it.

Just by throwing my eyeball down the hole, ... it has 20 splines.

I'm hoping to find a sprocket that will fit on the differential so I don't have to do more work than is necessary.

But something about this Kart, say's, ... Hell no, ... it ain't gunna be that easy!

I still might go after a Geo differential after looking at this one. By getting the Geo differential, it will make the Kart roughly 8.5" narrower in the rear.

The Tercel's short halfshaft is 26.781" collapsed.

The Geo's short halfshaft length is 22.5" collapsed.

I have a buddy that makes drive shafts, ... I will contact him about how much he will charge me to cut the halfshafts down a little.

 

[The_Machine]

why can't you just cut them in half, bevel, weld. then grind down and slide a coupler over, then weld it on?

 

[mkuivama]

Hi Bill! Looks like there's going to be extremely professional-built gokart!
I was wondering are you going to make modifications on frame? More length for example? I'm starting my own arachnid build and obiviously I have to extend the length of the main frame because I'm 1.93 meters tall. Also I'm considering larger shocks on my version and few other mods with the frame. (you might guess that I'm not very light either due to my length 95 kilos).
Anyone else here who's going to extend the length of the Arachnid
?

Mikko