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1  Engine Help / Briggs Flathead / OPPOSED TWIN BILLET RODS on: February 27, 2015, 03:13:30 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!
2  Mower Building / Setup Help / Driveline / 700 trans gearing on: February 20, 2015, 10:50:34 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  smile smile
 Thanks in advance!
3  For Sale / Mower Engines & Parts / ARC OPPY FLYWHEEL on: September 09, 2014, 02:42:11 PM
ARC BILLET FLYWHEEL FOR BRIGGS OPPOSED TWIN. ONE RACE ON FLYWHEEL.

$200 PLUS SHIPPING

PAID $359 TOTAL LAST MONTH.

MUST GO

PM ME OR CALL 516-639-8388
4  Engine Help / Briggs Flathead / OPPY VALVE SPRINGS on: July 06, 2014, 08:07:09 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!
5  Engine Help / Briggs Flathead / 40ci cam on: June 02, 2014, 10:19:34 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!
6  Engine Help / Briggs Flathead / Autolite spark plug on: April 25, 2014, 08:21:58 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???
7  Engine Help / Briggs Flathead / Oppy Fuel Problem on: April 21, 2014, 09:30:09 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!!
8  Engine Help / Briggs OHV & Vanguard / 17.5 intek billet flywheel on: April 18, 2014, 05:16:00 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.
9  Engine Help / Briggs Flathead / 20hp OPPY WIRING on: March 13, 2014, 04:29:40 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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