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Mower Building / Setup Help => Project Builds => Racing Mower Builds => Topic started by: George Herrin on June 19, 2011, 03:36:07 PM

Title: New SUPER MODIFIED Single build.
Post by: George Herrin on June 19, 2011, 03:36:07 PM
Well me and Jake has kicked it in high gear on the build. Single Super mod. It has a GX390 built and sponsored by Precision Cams. Did not take pictures of what we started with which basically was two Murray frame rails. But we have made some good progress over the last fewe weeks and will try to catch you up on it. Here are a couple pictures will get more later. Will be ready to race at the next event. 6/9/2011 at Full throttle Speedway in Carbon Hill ala.

Engine mounted and mocking up steering column
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0616112218.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0616112218.jpg)

A stepped back look at it trying to picture the end look in my head.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0616112218a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0616112218a.jpg)

Over all view. basically all we have left to do is wire it chain guards fuel tank run brake lines and bleed and mount hood. its coming out real good. We used deck halves same deck as on the Super Mod Twin. Love the look. Mid 70 box frame fenders got those from rooster. Steering column is from Jegs 3/4 hollow tube. steering suppoerts is from a cut up Kart chassis. And what we are most proud of the uxhaust exits the grass chute. While running it will look like the deck has the blades turning. better pictures below.
 (http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111340.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111340.jpg)

Side view gonna be a nice ride we think. We built it around Jake as he will be driving it the most and Joe woodside will drive it till Jake takes over. has an EC steering wheel and a ARC quick release hub. Had to make an adapter so it would work with the 3/4 shaft. Used a 3/4 pully hub from TSC and weld a washer that fit the shoulder then drilled and tapped for steering wheel bolts.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111340a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111340a.jpg)

a look from the rear
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111341.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111341.jpg)

Here is the steering linkage setup. Its just like the Twin works great so why change.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111341a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111341a.jpg)

a more up close look at the exhaust. Trying to keep it a free flowing as possible and think we did so it is 1-1/4 O.D and as you can see in the next two pics will exit thru frame into the grass shute of deck.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111341b.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111341b.jpg)

here you see it going thru frame, the clamp holds it to the section going thru frame which is welded to frame.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111342.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111342.jpg)

Outside the frame in the grass chute is the end of pipe. Should sound great and look cool blowing the dirt from the chute of deck.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111342a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111342a.jpg)

here is the flywheel side of motor as you can see it sits down low in chassis and will help with the low center of gravity yet will be easy to remove and work on.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111345.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111345.jpg)

Jack shaft is APS  but I used 1" bearings hold up better... Used bushings from TSC to shim down to 3/4 used a hub and aluminum sprocket from APS bolt on split 3 bolt easily changed. primary chain is 35 secondary is 40.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111345a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111345a.jpg)

View from rear sprocket and chain is close to wheel but thats not a bad thing either.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111345b.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111345b.jpg)

here is a view of the rear chain setup under the fender with tire off
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111347.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111347.jpg)

and lastly a look dwon the chain towards jackshaft sprocket.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0619111347a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0619111347a.jpg)
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 22, 2011, 08:42:37 PM
Well me and Jake have been working on the Chain Guard. We think it runed out nice. Sawzall, grinder, files and pop rivets and gun and wala. should have it ready to test this weekend. The race it the 9th at Full Throttle Speedway in Carbon hill. Then gonna have er painted if all goes well.


(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0622112102.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0622112102.jpg)

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0622112101a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0622112101a.jpg)

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0622112101.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0622112101.jpg)
Title: Re: New SUPER MODIFIED Single build.
Post by: mowslow on June 22, 2011, 08:57:12 PM
Nice chain guard. Are you making a separate cover for the clutch?
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 22, 2011, 09:17:09 PM
yes just undecided on exactly how I will do it. BUT this time tomorrow should have it figured out and done.
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 23, 2011, 09:51:27 PM
as I said I would have it figured out Well finished the chain guard tonight. One bolt and 3 dzuz fastners and its off. very solid and will be painted. Not gonna leave the aluminum look. Below are the pics of the finished guard.

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0623112154a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0623112154a.jpg)

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0623112154.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0623112154.jpg)

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0623112153a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0623112153a.jpg)

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0623112153.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0623112153.jpg)
Title: Re: New SUPER MODIFIED Single build.
Post by: Poor boy on June 23, 2011, 10:18:18 PM
What Color u going with
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 24, 2011, 04:24:01 AM
Hood will be the same hood as the SUPER MOD TWIN and its new and red so fenders and chain guard will be red and chassis will be blue just like my twin.
Title: Re: New SUPER MODIFIED Single build.
Post by: tgames64 on June 24, 2011, 04:55:01 AM
Holy cow... Is that Jake sitting on that thing???
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 24, 2011, 05:02:52 AM
Yes it is Ted he has grown just a lil bit since the last time you saw him huh... the boy is no lil feller no more. he is man size now and STRONG as a BULL. And can out drive his Dad on most days too.
Title: Re: New SUPER MODIFIED Single build.
Post by: tgames64 on June 24, 2011, 05:41:18 AM
Wow, he has gone through a growth spurt or two since I have seen him last... Good looking young man. 
Tell him Gail and I said hi!
    ;)
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 24, 2011, 05:49:34 PM
Yup he has grown like a weed cover with Miracle grow. Will let him know you and the family said hi
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 25, 2011, 06:38:17 PM
Well folks it lives not only does it live its fast!!!! Oh my goodness. I never thought a single could run like that. Precision CAMS built this motor completely and its an awesome piece. Jake has drove it. I have drove it and Joe Woodside the one I drive the new bass Pro Sponsored MOD-X for whom will run some races on it has drove it. Course Jake was FIRST wouldn't let me even try to drive it first. ALL new Hoosiers going on it Monday Night Will post more pics tomorrow night. ALL thats left is mount hood, bumpers and nerf bars. then paint.
Title: Re: New SUPER MODIFIED Single build.
Post by: Jeff Digou (Pitguy) on June 25, 2011, 06:42:36 PM
Sweet    Awesome build George   I hope you make it to the US open so i can see your mowers :)
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 25, 2011, 10:24:17 PM
Hood is sitting there we wanted to get a look in our heads... Will have it mounted tomorrow
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0625111951a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0625111951a.jpg)

Here is the fuel cell. and a general view of it as we tested it. I made a top plate for the motor and mounted fuel pumnp on it.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0625111953.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0625111953.jpg)

Weld tabs on the column support for starter button and kill switch
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0625111952b.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0625111952b.jpg)

A general view of everything from the right side.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0625111952a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0625111952a.jpg)

We could not find the gas cap for the MTD tank so I had a fuel cell for Jr. dragster and the top after measuring would work. SO the  mounted that and used the foam insert from the fuel cell also and we are very pleased at how it come out.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0625111952.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0625111952.jpg)


It runs and drives great though.
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 26, 2011, 04:24:09 PM
Well its done!!! The pictures were taken as we turned it around to put the last nerf bar on. BUT its finished and only need to get a race in now to make sure its all good then off to JSE racing for paint... Enjoy the pictures.

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0626111359c.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0626111359c.jpg)

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0626111359b.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0626111359b.jpg)

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0626111359a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0626111359a.jpg)

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0626111359.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0626111359.jpg)

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0626111351.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0626111351.jpg)
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 27, 2011, 10:03:52 PM
Jake put some new shoes on it tonight... Thanks to JSE RACING (Joe Woodside)
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0627112135.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0627112135.jpg)

Installed a catch can for the breather hose.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0627112133b.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0627112133b.jpg)

If you look closely it is setup so I can open the valve on bottom and let the oil drain back into the motor after the race IF it blows any So far it has not.
(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0627112133a.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0627112133a.jpg)
Title: Re: New SUPER MODIFIED Single build.
Post by: Big Mike on June 28, 2011, 09:10:51 AM
any chance of a video of this thing moving George?
Title: Re: New SUPER MODIFIED Single build.
Post by: Burwell555 on June 28, 2011, 09:18:19 AM
That catch can set up is a clever idea for sure!!
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 28, 2011, 09:33:03 AM
Got video Nd will have more and have several from races this year from my GoPro helmet cam but nomway to upload T the moment Hughes satellite is slow as dailup and cost 4 times as much plus their socalled fair access policy kills any thing like uploading big files
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on August 13, 2011, 09:13:43 AM
Here she is havn't even unloaded it yet. Picked it up yesterday evening from paint we displayed it at a huge car show last night. Now to get it unloaded and get the rest of the sponsor decals on it.

(http://i48.photobucket.com/albums/f232/GeorgeHerrin/th_0813110933.jpg) (http://s48.photobucket.com/albums/f232/GeorgeHerrin/?action=view&current=0813110933.jpg)
Title: Re: New SUPER MODIFIED Single build.
Post by: Big Mike on August 13, 2011, 10:59:58 AM
real nice shes a looker
Title: Re: New SUPER MODIFIED Single build.
Post by: BIG AL 202 on August 13, 2011, 07:15:22 PM
Hey George looked through your photobucket and I see a fresh track, yours? How big? The supermod looks GREAT!
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on August 13, 2011, 07:25:53 PM
Would have to look and see myself LOL
Title: Re: New SUPER MODIFIED Single build.
Post by: Lawrence Mowersports on August 13, 2011, 10:31:58 PM
Hey George looked through your photobucket and I see a fresh track, yours? How big? The supermod looks GREAT!

Fresh track is Stevenson, AL...  This is where the All American is going to be this year.

From the All American Thread...  Track is 180 ft straights, 30 foot radius turns, 30ft wide on straights, 40 foot wide on turns.
Title: Re: New SUPER MODIFIED Single build.
Post by: philr85 on August 13, 2011, 11:29:44 PM
where did you get your univeral teether ec? i noticed it wouldnt mind one myself.
 i got the cap one and its cracked and glued, i dont think it will last the season without failing me so i thought id ask as opposed to buying the whole switch.
Title: Re: New SUPER MODIFIED Single build.
Post by: foolnhismoney on August 25, 2011, 12:41:52 PM
I was looking at this and thought wow what a great Idea the way its all set up. But it hit me I don't know of any lawn mower that came with that style Honda motor is this going to be a problem in an ARMA or USLMRA race?
Title: Re: New SUPER MODIFIED Single build.
Post by: birdman_express on August 25, 2011, 12:46:19 PM
I was looking at this and thought wow what a great Idea the way its all set up. But it hit me I don't know of any lawn mower that came with that style Honda motor is this going to be a problem in an ARMA or USLMRA race?

In the ARMA Super Modified or USLMRA Open classes, this motor fits the class legal.
Title: Re: New SUPER MODIFIED Single build.
Post by: foolnhismoney on August 25, 2011, 12:53:00 PM
so they only have to come from a lawn mower in lower classes?

I thought it says of lawn mower origin for a reason. my question is what lawn mower did it come in?
Title: Re: New SUPER MODIFIED Single build.
Post by: royalblu68f100 on August 25, 2011, 12:55:39 PM
I would guess a Honda walk behind or commercial.  I have seen very few Honda mowers, and the ones I have seen have water cooled engines.
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on August 25, 2011, 01:30:03 PM
so they only have to come from a lawn mower in lower classes?

I thought it says of lawn mower origin for a reason. my question is what lawn mower did it come in?
It's no longer produced but it did come in one 'twas a 4 wheel drive if I remember right was the only production model in us it's in many over seas
Title: Re: New SUPER MODIFIED Single build.
Post by: foolnhismoney on August 25, 2011, 01:40:00 PM
I kinda figured the overseas thing was a possible explaination. I am the tech guy at my Track and someone asked me if I had seen your supermod single yet? I said "yes saw some pictures of it on facebook looks like a real nice mower" he says can I build one like it for here we race under ARMA rules. I said " I don't see why not" and he says but I don't think motor came in Lawn mower can I still use it and be ok. I told him I would look into it. I spent a lot of time looking at equipment today with Hondas to see if I could answer this question. I had to ask and find out. Thanks George
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on August 25, 2011, 01:49:05 PM
Well it's legal or I would not have done it
Title: Re: New SUPER MODIFIED Single build.
Post by: Rooster on August 25, 2011, 01:56:32 PM
The 390GXV was in alot of mowers.
Title: Re: New SUPER MODIFIED Single build.
Post by: foolnhismoney on August 25, 2011, 02:08:45 PM
Which ones?
Title: Re: New SUPER MODIFIED Single build.
Post by: Rooster on August 25, 2011, 02:41:14 PM
HONDAS
http://www.tractordata.com/lawn-tractors/000/6/7/676-honda-h2013-engine.html

Title: Re: New SUPER MODIFIED Single build.
Post by: foolnhismoney on August 25, 2011, 04:13:38 PM
So im clear then it doesnt matter if its vertical or horizontal as long as the model came in a mower.
Title: Re: New SUPER MODIFIED Single build.
Post by: Gui961 on August 25, 2011, 04:44:17 PM
the GX390 was used in a Honda 4x4 mower like George said, there was one for sale around here not too long ago

also the GXV390 was used in a rear engine mower
Title: Re: New SUPER MODIFIED Single build.
Post by: Sherman Underwood on September 28, 2011, 09:31:02 AM
George, what's the wheel base, and track width of the mower..??  if it's not a trade secret.....  :) thanks
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on September 28, 2011, 11:19:21 AM
47 wheel base and 42 with a 4" offset width
Title: Re: New SUPER MODIFIED Single build.
Post by: Tazz914 on February 09, 2012, 11:59:02 AM
hey george, what kid of clutch did yall use if you dont mind me asking?  :confused:
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on February 09, 2012, 12:08:44 PM
It has a noram Star clutch on it mounts inboard or outboard.
Title: Re: New SUPER MODIFIED Single build.
Post by: Tazz914 on February 09, 2012, 12:10:04 PM
thanks for the info george
Title: Re: New SUPER MODIFIED Single build.
Post by: Wise_Guy_racing on February 09, 2012, 09:30:47 PM
Hey George , I was interested in your catch can wanted some more info on it great idea.
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on February 09, 2012, 09:44:36 PM
ec sells it I have it set up that after a race I can open the darain and iut runs back into the motor. The part number is 707k
Title: Re: New SUPER MODIFIED Single build.
Post by: JAMES BOND on February 10, 2012, 08:54:20 PM
George , that catch can idea was an idea we at Mac racing have been using for for 8 years. It will work well. You can also use a fuel pump to return it to the motor while you race. That's what we do now. The Honda will not puke alot of oil anyway. There all kinds of tricks you can come up with. You just have to be ahead of the game. Can't wait to get on the track and see what its got.
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on February 11, 2012, 09:27:43 AM
As have MANY MANY others over the years its been around since the beginning of time or RACING its the new guys or those thats not been around racing that dont know about. But with the help of these pictures and the forums we bring up knowledgeable racers that have great equipment.
Title: Re: New SUPER MODIFIED Single build.
Post by: shaun86chevy on June 01, 2014, 05:46:06 AM
George I know this is an old thread but why did u use a jackshaft on this machine. I'm building an mtd chassis for a local club and am using the 420cc predator clone. I wasn't going to use a jackshaft but am I missing something???
Title: Re: New SUPER MODIFIED Single build.
Post by: Jeff Digou (Pitguy) on June 01, 2014, 06:59:39 AM
Not George,     Shortens the chains and also gives your more gear ratios to play with.    Most run 35 chain to jack shaft and 40 chain back to axle.   Biggest thing is to keep the chains short.  They live longer .
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on June 01, 2014, 12:18:03 PM
Trying to get the ratio without a jack shaft is very hard.  And as above chain length.
Title: Re: New SUPER MODIFIED Single build.
Post by: KEN ROBINSON on May 19, 2016, 12:29:27 PM
i have a question for george.how wide are the frame rails outside to outside
Title: Re: New SUPER MODIFIED Single build.
Post by: crazycraftsman on May 19, 2016, 10:38:09 PM
I'm not George but per rules max 15"
Title: Re: New SUPER MODIFIED Single build.
Post by: George Herrin on May 20, 2016, 06:23:10 AM
They are widened to 15"
Title: Re: New SUPER MODIFIED Single build.
Post by: KEN ROBINSON on May 21, 2016, 05:23:40 AM
thanks