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Topics - boomboom

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Driveline / murray jackshaft pulley
« on: April 06, 2016, 08:58:05 pm »
Question fellas......Im using a Murray jackshaft. 5/8 shaft, both ends splined. one end is a fine spline, the other end is isn't. Been hunting ebay, Im looking for matching size pulleys to fit a 1/2" belt. Any leads on who sells the pulleys Im looking for? Thank you!

2
Chassis / Brake Hat
« on: April 01, 2016, 10:50:21 am »
Hi all. Not sure if this is the correct section for this, if not then please move the post. Thanks!
Im building a mower for my son, and I will be running a peerless 820. Im putting a disc brake on for him lol.  Im looking for any leads on who still sells brake hats. Any help is appreciated......searched high and low and found nothing. Thank you!!

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Briggs Flathead / OPPY TIMING QUESTION
« on: August 26, 2015, 11:14:39 pm »
Quick question.....I have a 46ci oppy with billet rods, billet flywheel, precision 212 cam, EC double valve springs, ported to the hilt. Stock appearing carb lol. I have heard and read mixed opinions in the past about where to set the timing along with air gap. Where Im set now is  air gap 15, timing is 5 marks advanced on flywheel. I run a 1/10th mile track and Im around 4000rpm. Very aggressive off the corner but flattens out at end of the straight. Like I mentioned, Im not breaking 4000. Any tips on what timing and air gap with this cam? Thanks in advance!

4
Briggs Flathead / DIGATRON DT32 K1
« on: April 17, 2015, 08:00:15 pm »
I have an old Digatron I used on my nephews race kart. I mounted it on my race mower and Im having trouble calibrating it. The motor is a 46 opposed twin with a precision cam. Everytime I set the calibration (be it .5, 1, or 2) it reads around 2.40. Looking at the front of the motor, the wire is attatched to the left plug wire. I even have about 3" of the green wire taped to the plug wire, and it starts about 2" from the boot. Am I missing something with setting it? Any help is GREATLY appreciated. Thank you!!

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Briggs Flathead / ROOSTERS OILING MODS
« on: March 17, 2015, 07:38:56 pm »
Does anyone have the link to Roosters post on oiling mods? I found it once last year and now I cant. Been typing different things in the search bar but just not coming across it. A link would be great. Thank you!

6
Kohler Engines / 20hp KOHLER OPPOSED TWIN
« on: March 12, 2015, 04:16:03 pm »
Just got my hands on a Kohler 20hp opposed. I haven't opened it up yet but has a side draft carb, aluminum intake, pressure lube. Just wondering if anyone has ever raced any of these motors and is it worth looking into or are they junk? Thanks guys!

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Briggs Flathead / OPPOSED TWIN BILLET RODS
« on: February 27, 2015, 04:13:30 pm »
Ok all 3 of you oppy lovers  :lol: I have a question. I have a 46ci oppy. I went ahead and had a cam ground for it and ordered a set of ARC Billet rods. Heres the dilemma. I wont mention the name of the guy who ground the cam, though he is well known. He sent me a set of 42ci billet rods (#6302). When I called to tell him they were wrong, he said the 42 and 46 are the same size. I know their not, Ive been running oppys for a few years now. Anyway I looked them up and saw 42's are 4.96 and the 46 are 4.87. Didnt think it was a big difference. Well my piston is sitting 1/2 inch above the deck. Put a call in to the "engine guy" and havent heard back. Is there a certain piston I have to run with these? Does the model 28 piston have a different wristpin height than a stock piston? Im a little on the frustrated side right now so I do apologize. Im very disappointed in this guy. After spending a decent chunk of change, I would hope to get the right combination.....not just sell me parts. Any help would be very appreciated. Thanks all!

8
Driveline / 700 trans gearing
« on: February 20, 2015, 11:50:34 pm »
Quick question. I run a 46 oppy (precision cam, billet rods, double valve springs, billet flywheel). I'm switching from the 820 to a 700. 700 has been modded for gear oil (input shaft seal, vented) and reverse removed. Now....I have a 1 1\4" axle, I run on a 1\10mile oval. 8" engine pulley, 5" trans pulley. I want to keep rpms around 4-4500. What sprocket, gear combo would any of you recommend? I read a 12-46 was a ballpark start....but some vtwins I run with are at 9-53. But their getting the rpms....I'm looking to get out of the hole and pull down the straight (aren't we all?  :roll: ). Any help is very much appreciated  :) :)
 Thanks in advance!

9
Briggs Flathead / OPPY VALVE SPRINGS
« on: July 06, 2014, 09:07:09 pm »
Can anyone tell me which EC valve spring and retainer part numbers are for an opposed? Also does the "set" come as a set of 2 or 4 for the springs, a full or partial set for keepers and retainers? Thanks in advance!

10
Briggs Flathead / 40ci cam
« on: June 02, 2014, 11:19:34 pm »
Ok guys....quick question. I have  a 16hp oppy model #402707. I have a stock cam and heads from a 20hp oppy model#461707. Would I gain anything worthwhile by putting the 46ci cam in the 40ci motor? I just sent my carb out to EC so I have a little time to play around but not really enough time for trial and error  :doh: . There is a ton of experience on this forum and I have learned so much reading past posts. This forum has helped me go from running in the back to being a top 3 machine. Any help is more than appreciated!

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Briggs Flathead / Autolite spark plug
« on: April 25, 2014, 09:21:58 am »
Quick question.....16hp Oppy, stock, have champion jlm19 plugs in it now. 3 bolt carb off a 20hp oppy with external fuel pump, now getting more fuel than b4....lol. coil air gap set at .013. What autolite plug would work the best? I know some of the guys I run against use a racing autolite plug. Can anyone tell me what plug number is hotter than the champions im running???

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Briggs Flathead / Oppy Fuel Problem
« on: April 21, 2014, 10:30:09 pm »
Ok guys I need your help. New build, 16hp oppy, I have the motor set with the carb sticking out of the left side of the hood. I have 2 carbs Im playing with - 1 older with 3 bolt fuel pump and 1 with 4 bolt fuel pump. The 3 bolt is bigger but for some reason it will not pull the fuel.  Both carbs and pumps are fresh rebuilds. The 4 bolt pulls the fuel but I run out coming off the corner (this being because of the direction of carb....float raising the needle etc). Now....I ran 5/16 fuel line from tank to carb with inline filter. Tank is mounted under seat BUT is lower than the carb. Should I go back to 1/4 fuel line? Is it too much for the 3 bolt to pull? My vacuum hose to carb is pulling from the #2 boss on the intake (NOT the block) that I drilled and tapped. I recently read a post about a reserve tube off the side of the carb which I will try....but my concern is I know these things like to be on the rich side....NOT the lean side so Id rather run the 3 bolt. Any ideas? Any help is GREATLY appreciated. Thanks in advance!!

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Briggs OHV & Vanguard / 17.5 intek billet flywheel
« on: April 18, 2014, 06:16:00 pm »
I have a 17.5hp intek ohv single I want to put a billet flywheel on. Anyone know which model flywheel is for that motor? My 20hp oppy grenaded yesterday and the first race is next sunday  :bash: .. I have a 17.5hp intek model 31F707 0112E1 that im going to have to run for now. Any help is appreciated. Thanks in advance.

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Briggs Flathead / 20hp OPPY WIRING
« on: March 13, 2014, 05:29:40 pm »
Ok guys I have a question. I just got my hands on a 20hp Briggs oppy model:461707 0143E1. I have no idea if I have everything I need to wire this.   :bash: Im searching high and low for a wiring schematic for this thing. My last motor was a briggs 17hp intek so the twin is pretty different. Im looking for a schematic that can show me what I need to run it on my race mower. Minimal as possible of course! ANY help is appreciated. Thanks guys!

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