: Racing Mower Build

12-02-2014, 09:49 PM
Not necessarily a car, but defiantly a "other" build. I'm going to build this tractor to have some fun in the pits, something different than all the golf carts, atvs, and dirtbikes/minibikes. This build will be over the winter, as i am usually busy and only do this when i get some spare money and free time.

So here we start off with this old run down Dynomark lawn tractor, Been in the family for a long while. got it of my grandfather, dug it out of his old run down shed, brought it home, and shot it with some degreaser and a power washer.


So i disassembled the tractor, and spread all the parts across the shop. I cleaned up my mess and decided to call it a night. Next free time i got, i decided to give the engine a nice clean out. i gave it a new head gasket, and a shot of paint. I cleaned the head and plug, coil and all that stuff, set plug gaps, and some other small things. I decided that the shitty little B&S carb wouldn't make do, so i grabbed a huddleson preformance carb and made a plate to make it fit out of a 1/2" chunk of aluminium. That was about all i could take for one night, so i cleaned up my mess and decided to go to bed.

Over the week I was pretty busy, so i decided to brain storm what i should do with the setup. I'm thinking I'm going to pick up some 1" diameter steel tube and make a new frame with it, completely tube. I plan on using sheet metal to fill the gaps. I'm going to make the frame a little bit longer than the original, so I'll have to extend the hood. I havent decided yet if i should sell my current B&S flathead 13HP and move up to a V-Twin B&S Vangaurd Big Block V/S. Aluminum block and 36 horsepower, should get me where i plan on getting, but I'm still going to have to step it up. Two ebay turbos sounds good. My plan is to get power and speed, while staying reliable, Thats why, i hope to move up to a EFI system, But that comes lateer, when i have some cash laying around.

I plan on running the stock transaxle, just beefing it up a little. i will be rebuilding it sometime soon, and will be locking the diff, new bearings, and just making sure it's all well lubricated.

So you all are caught up on my winter project, I hope you enjoyed reading this as much as I enjoy reading your threads.

So, I Thank you all for reading, I will keep you all updated. :D

01-09-2015, 06:53 PM
Cool project. Any updates?

DHR Darren
01-09-2015, 07:01 PM
Been there, Mowers are the best dollar to fun ratio you can have in racing.
Good luck!!
http://i135.photobucket.com/albums/q156/Dragnova67/Mower%20racing/029_zps6813512f.jpg (http://s135.photobucket.com/user/Dragnova67/media/Mower%20racing/029_zps6813512f.jpg.html)
http://i135.photobucket.com/albums/q156/Dragnova67/Mower%20racing/MowtownKilla-Jubilee_zps4195de76.jpg (http://s135.photobucket.com/user/Dragnova67/media/Mower%20racing/MowtownKilla-Jubilee_zps4195de76.jpg.html)

manic mechanic
01-09-2015, 07:07 PM
Fun for sure.

http://i11.photobucket.com/albums/a191/sr71mopar/100_4081.jpg (http://s11.photobucket.com/user/sr71mopar/media/100_4081.jpg.html)

01-12-2015, 04:58 PM
No updates yet, going to strip down the engine and do some minor modifications to it this weekend. I will make sure to snap some pictures and keep you all updated :D

02-19-2015, 09:07 PM
Here's mine.
http://i1233.photobucket.com/albums/ff391/redline9/10523733_10152772693814656_863850466596941252_n_zp s65bd91a4.jpg (http://s1233.photobucket.com/user/redline9/media/10523733_10152772693814656_863850466596941252_n_zp s65bd91a4.jpg.html)

02-23-2015, 10:26 AM
Do you guys use the stock transaxle? Can I powershift it?

DHR Darren
02-23-2015, 12:01 PM
I used a hollow aluminum 1.250" cart axle.

02-25-2015, 02:34 PM
We just swapped the drive pulleys around on a 16hp craftsman. It was pretty nutty. GPS'd 28mph and would pull the wheels way past the comfort zone... After a year or so the rear end went out. Fun while it lasted though!

Have you seen the V-twin harbor freight motors? 670cc 22hp. Not near as powerful as a Vangaurd Big Block, but MUCH cheaper.

Good luck, sounds fun!



02-25-2015, 10:12 PM
Mine (pictured a few posts ago) uses an 820 transaxle with jackshaft. Powershifting will kill any of them in a short time. They use small shift "keys" that don't like that!

We raced at a high banked prepared clay kart track a few years ago. Guy with a radar gun had me at 72mph down the straight.

Engine has a ton of work done to it. We have not had the current engine on a dyno, but comparing it to a past engine that was, we figure it's around 55-60hp.

DHR Darren
02-25-2015, 10:17 PM
I use a race prepped Peerless 700. Acme Mowersports & a few others are great places to source parts.

Vinny V
02-25-2015, 11:23 PM
Get billet flywheel so yours don't explode and kill ya.

Peep Show Racing
02-25-2015, 11:27 PM
A buddy and I are getting ready to hot rod a lawnmower. What are good ones and ones to run like the wind from?

Im thinking a fun pit cruiser that can tow the car too.

02-26-2015, 06:28 PM
If your not building an actual race mower, most any will do. For racing, I prefer MTD's. (Yard machines, yardman, Ranch King) all the same thing.

Darren, ACME is no longer. Guy who owned and ran it passed away.

I have used BMI kart, American power sports and EC carburetors for some things. The rest I build/make myself.

03-10-2015, 11:22 PM
Well we got some warm weather um here in Canada and i decided it would be a good time to clean the garage and dig the project mower out of the junk ontop of it. I set all the parts where they should be for a couple of pics, and i've decided to sand blast it and give it a glossy red paint job. I'm open for suggestions on things i can do to it to make it fly. Planning on a small turbo. Next update will probabally be about the transmission or the engine, cause both are messed up. Does anyone know a way of removing a rusty flywheel? Cause a puller tool won't do it. Thanks guys! All comments and help is appriciated!

03-10-2015, 11:33 PM
The other photo and a clean(ish) garage

03-11-2015, 10:26 AM

DHR Darren
03-11-2015, 11:20 AM
BFH will get the flywheel off.

Damn, didn't know that about ACME. R.I.P.
BMI & EC are great vendors also.

07-01-2015, 03:44 PM
Sorry for having no updates, I dislocated my shoulder and sliced my eyebrow. I'm covered in road rash. In the next week and a half I should be able to pull out the mower and get to work. I have a 125cc bike engine,, I may use that instead of the stock one

frank zappa
07-01-2015, 04:33 PM
its already badder than that mustang in your avatar LOL

07-01-2015, 11:31 PM
Atleast the mustang runs