Go kart project twin engine 18hp 21ft/lbs Duromax

[Poboy kartman]

*bump

watch where you're going!!!!

 

[Jackseale777]

I know he used clutches then converters. I'm sorry I wasn't clearer. I'm asking do you lose any performance by connecting the converters to a jackshaft then to the axle vs the converters straight to the axles

 

[Jrgunn5150]

I know he used clutches then converters. I'm sorry I wasn't clearer. I'm asking do you lose any performance by connecting the converters to a jackshaft then to the axle vs the converters straight to the axles

Well there's some inmeasurable amount of frictional loss I'm sure, and then he doesn't have to buy a chain I guess, but the additional gearing flexibility you get from having the jackshaft would outweigh it for me.

 

[Jackseale777]

What ratio we talking about being able to do? 5:1,4:1? I was planning on buying sprockets for a 6:1 to test first and go ahead and get somewhere around 4:1 to 4.5:1 ratio

 

[Jackseale777]

Update: 2nd motor just came in yesterday. Now I'm going to buy the engine performance Parts and start mocking up a plan to fit these things on����

 

[bob58o]

Rather B Welding had 212cc engines. with 30 series TC's. There is no need for a common jackshaft. The 2 individual 30 series TC's each come with their own (built in) jackshaft. With 30 series, like in the vid, it is easiest to add a 2nd hub and sprocket on the axle. With the 40 series, it is easiest to put the two driven pulleys and one sprocket on a common jackshaft with only one chain and one axle sprocket.

---------- Post added at 09:18 AM ---------- Previous post was at 09:16 AM ----------

What ratio we talking about being able to do? 5:1,4:1? I was planning on buying sprockets for a 6:1 to test first and go ahead and get somewhere around 4:1 to 4.5:1 ratio

6:1 with TC's may flip this over backward? I forgot the tire size, sorry.

---------- Post added at 09:28 AM ---------- Previous post was at 09:18 AM ----------

If you set up both driven pulleys on a single jackshaft and run only 1 chain, It will make it easier to change gearing later. Also 2 piece split axle sprocket(s) make switching the gearing easier as well.

If you go with only 1 chain, I'd go with something strong. #420, #40 (or even stronger)

Gearing will be able to be changed by the sprocket on the jackshaft or the axle, so shop around, see what is available, see what comes with the TC. You'll be glad if you spend some extra time now and see what different bore, number of teeth, and chain size are available for you to play around with.

---------- Post added at 09:32 AM ---------- Previous post was at 09:28 AM ----------

I have a 40T motorcycle sprocket that I have no immediate plans for... but it fits a 1.25" axle.

Its heavier than 420 I think?

 

[Jackseale777]

22" tire size. I was planning on a 6:1 and then have a 4.5:1 to test. Where's the best place to find split sprockets? I don't see too many of em at the sites I've been looking at

 

[ezcome-ezgo]

There's oodles of them on eBay.

 

[bob58o]

I am not familiar with the 40 series TC. Does it come with a sprocket?

I think you'll have to decide the the Diameter of the jackshaft (maybe 3/4") and see what sprockets have a 3/4" bore.

I'm not sure that I would trust a single #35 chain for this application, so I would look for #41, #420, #40 sprockets with a 3/4" bore and see what the teeth options are.

You might want to look for a 72T axle sprocket and a 12T and 16T jackshaft sprocket (if they are available in 3/4" bore and #40 chain size) to get your 6 and 4.5? It may be easier and cheaper to change the JS sprocket instead of the axle sprocket.

59mph at 5400 RPM with 6:1
35mph at 3200 RPM when TC is at fastest ratio. Cruising around at a lower speed may wear belts faster? Please correct if my understanding is incorrect here.
Max Wheel Torque 766 ft lb <-Without any math, sounds like wheelies?

78mph at 5400 RPM with 4.5:1
46mph at 3200 RPM when TC is wide open. This is why I am asking if my understanding of how cruising around at a lower speed wears the belt. I find it hard to believe that you'll be north of 46 mph most of the time. But I may be wrong. I also may be wrong about cruising at less than 3200 RPM with a Torque Converter?
Max Wheel Torque 575 ft lb.

Torque from app.kartcalc.net

---------- Post added at 03:59 PM ---------- Previous post was at 03:39 PM ----------

Also now is the time to think about all the stuff you could do with this power and jackshaft.
You could really GAB.

Alternator Pulley, Superchanger Pulley, another brake rotor??
With an Alternator, you could so all sorts of fun stuff...
Winches
NOS Solenoids LOL
EFI
Stereo System.

Mostly just joking, but you'll have an opportunity to do a lot of stuff that most can't.

 

[Jackseale777]

What is GAB? My biggest obstacle is mounting the engines. But I just thought about I could buy a much wider axle, widen the rear end, and the motors would fit with ease. And yea I want a sprocket set for torque=wheelies and another sprocket for top speed maybe a few small jumps. I'm planning on 1" jackshaft and #40 chain. How'd you come up 575ft/lbs

 

[bob58o]

What is GAB? My biggest obstacle is mounting the engines. But I just thought about I could buy a much wider axle, widen the rear end, and the motors would fit with ease. And yea I want a sprocket set for torque=wheelies and another sprocket for top speed maybe a few small jumps. I'm planning on 1" jackshaft and #40 chain. How'd you come up 575ft/lbs

The 575 came from app.kartcalc.net

I put in 36HP, 22" wheels, 40 series TC, and 4.5:1 Gear Ratio, 250kg

I might have made a mistake with input?

(Torque at engine x 2) x 4.5 =
20 x 2 x 4.5 = 180
180 x (2.7?) =486 ft lb.

2.7 is from TC, but I don't know the exact number for 40 series. It is probably 2.5 - 3?

---------- Post added at 04:51 PM ---------- Previous post was at 04:43 PM ----------

What is GAB?

"Going All Bob"
A Term made up to make fun of my inability to let good enough alone and desire to tinker with, and go overboard with everything - all while knowing very little, but willing to spend the time to learn and regurgitate google research from Detroit Hood TV"
?

This build has "GAB" written all over it, that's why I'm so interested!
"GAJ" sounds funny and I hurt my face trying to say it.

 

[Jackseale777]

Hahaha I've never heard of it but it sounds funny! I'm ready to have this thing screaming! Lol the come air filters like the K&N style. Do ou all simply just use the filter by itself, or the filter with the filter oil, and pre filter? I've seen it done all 3 ways

 

[Jrgunn5150]

Hahaha I've never heard of it but it sounds funny! I'm ready to have this thing screaming! Lol the come air filters like the K&N style. Do ou all simply just use the filter by itself, or the filter with the filter oil, and pre filter? I've seen it done all 3 ways

When mine was sitting outside, I had a chunk of panty hose on the filter to keep water out, but that was it.

 

[Poboy kartman]

When mine was sitting outside, I had a chunk of panty hose on the filter to keep water out, but that was it.

Leftovers from your last liquor store robbery?

 

[Jrgunn5150]

Po Folks, Po Ways

 

[Poboy kartman]

Hey...I'm all about energy conservation and recycling.

It takes less energy to point a jr gunn at a liquor store clerk...and you don't want to take a chance on a run in your facemask by using them twice....or risk law enforcement finding them in your curb trash!

 

[Jackseale777]

Would y'all run dual mechanical disc brakes or one single hydraulic brakes? I can't decide which would be best.. http://www.bmikarts.com/1-or-1-14-Cast-Aluminum-Hydraulic-Brake-Kit-_p_583.html

https://www.ebay.com/itm/161863546859

 

[Jrgunn5150]

My Mechanical brake left alot to be desired, especially when it got hot. But, as long as the link was hooked up, I did have brakes.

 

[Jackseale777]

How much did your kart weigh?

 

[Jrgunn5150]

How much did your kart weigh?

Maybe 200 lbs, but more like 475 with me in it lol.