| Briggs Opposed Build 46ci | |
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+17Doug B440 Frankenvarna Doc Sprocket TroyBilt Pony redlinemotorsportts mr.modified 1997 Murray willis923 LAWN MOWER MUDDER TheBeal Stretch44875 Thunderdivine Moose Angchor jamcco crafsmankiller 21 posters |
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B440 Member
Join date : 2014-01-22 Posts : 226
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redlinemotorsportts Moderator
2014 Build-Off Entrant
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Age : 27 Join date : 2013-03-18 Points : 7435 Posts : 3131 Location : raleigh nc
| Subject: Re: Briggs Opposed Build 46ci October 20th 2014, 9:15 pm | |
| - Doc Sprocket wrote:
*Your timing may be retarded. If it is, I'll get some helping aids, take care if it. - B440 wrote:
- I like my timing Paris Hilton-style: rich and retarded
That was pretty funny. Motorcycle thing? | |
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mr.modified Veteran Member
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Age : 34 Join date : 2013-11-02 Points : 7116 Posts : 2907 Location : New Jersey USA
| Subject: Re: Briggs Opposed Build 46ci October 20th 2014, 9:41 pm | |
| I had a push mower engine that I used to mess around with. I tried changing the timing by just getting rid of the key all together and just eye balled the keyway, then carefully tightened the flywheel nut so as to not turn the flywheel on the crank. I marked TDC on the flywheel with some white out and used a timing light to get an idea of where it was firing. I don't remember it kicking back too bad or anything. Pull start of course. What's a car engine in general run on the road? Around 30 degrees advanced maybe? Should check it out with a timing light and get an idea of what these run stock. I don't remember what the push mower was, of course I was kind of guessing around at things. | |
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B440 Member
Join date : 2014-01-22 Points : 4156 Posts : 226 Location : Thompson, CT
| Subject: Re: Briggs Opposed Build 46ci October 23rd 2014, 9:42 pm | |
| - redlinemotorsportts wrote:
- B440 wrote:
- I like my timing Paris Hilton-style: rich and retarded
That was pretty funny. Motorcycle thing? Yeah. Someone had it in their sig. and now it's the first thing that comes to mind when someone talks about timing/jetting. | |
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redlinemotorsportts Moderator
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 27 Join date : 2013-03-18 Points : 7435 Posts : 3131 Location : raleigh nc
| Subject: Re: Briggs Opposed Build 46ci December 20th 2014, 11:36 pm | |
| Back from the grave, hard to get stuff done in 40 min classes and every other day. Decided to try this out while i have the opportunity. Stock el portos Dremel meet ports! Power difference? Ehhh... Experience? Check! do i have to lap the valves or what when they go back in? Planning on getting some chopper sheeting for gaskets, then i can get most of it together. Gotta get some black pipe elbows, got some tube so i can fab up a intake manifold to the intek-nikki carb. eventually pull the flywheel off and shoot for 3-4 degrees on timing. | |
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Doug Site Owner
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Age : 29 Join date : 2012-12-24 Points : 7731 Posts : 3044 Location : Lebanon County, PA
| Subject: Re: Briggs Opposed Build 46ci December 21st 2014, 2:05 am | |
| I have copper sheeting, not sure how consistent (thickness) it is though... Head Forum Administrator ** Chat Moderator ** Facebook Page AdminATLTF Facebook Page ** Chatbox ** How To Upload Pictures
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redlinemotorsportts Moderator
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 27 Join date : 2013-03-18 Points : 7435 Posts : 3131 Location : raleigh nc
| Subject: Re: Briggs Opposed Build 46ci December 21st 2014, 10:19 am | |
| - Doug Fackler wrote:
- I have copper sheeting, not sure how consistent (thickness) it is though...
Where did you get it? That's all I need to know | |
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Doug Site Owner
2014 Build-Off Entrant
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Age : 29 Join date : 2012-12-24 Points : 7731 Posts : 3044 Location : Lebanon County, PA
| Subject: Re: Briggs Opposed Build 46ci December 21st 2014, 12:50 pm | |
| It came from store online. I got it for free from a friend. Its like flashing, but pure copper. Head Forum Administrator ** Chat Moderator ** Facebook Page AdminATLTF Facebook Page ** Chatbox ** How To Upload Pictures
_X_ FORUM ANNOUNCEMENTS _X_Have a question? Ask me! Type in "@Doug" in your post!
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redlinemotorsportts Moderator
2014 Build-Off Entrant
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Age : 27 Join date : 2013-03-18 Points : 7435 Posts : 3131 Location : raleigh nc
| Subject: Re: Briggs Opposed Build 46ci December 21st 2014, 1:59 pm | |
| - Doug Fackler wrote:
- It came from store online. I got it for free from a friend. Its like flashing, but pure copper.
Flashing, eh? Seems like the local store should have some. Danke | |
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ZSmachines Member
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Age : 25 Join date : 2014-08-27 Points : 3944 Posts : 221 Location : PNW
| Subject: Re: Briggs Opposed Build 46ci December 21st 2014, 2:23 pm | |
| I have always thought that it would be cool to make a "hemi" head for these... it would still be a flathead but have the headshape of a hemi. | |
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Doug Site Owner
2014 Build-Off Entrant
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Age : 29 Join date : 2012-12-24 Points : 7731 Posts : 3044 Location : Lebanon County, PA
| Subject: Re: Briggs Opposed Build 46ci December 21st 2014, 5:32 pm | |
| - redlinemotorsportts wrote:
- Doug Fackler wrote:
- It came from store online. I got it for free from a friend. Its like flashing, but pure copper.
Flashing, eh? Seems like the local store should have some. Danke Or a crafts store. Head Forum Administrator ** Chat Moderator ** Facebook Page AdminATLTF Facebook Page ** Chatbox ** How To Upload Pictures
_X_ FORUM ANNOUNCEMENTS _X_Have a question? Ask me! Type in "@Doug" in your post!
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willysjeepmb Member
Age : 28 Join date : 2014-11-23 Points : 3720 Posts : 101 Location : Elora, Tn
| Subject: Re: Briggs Opposed Build 46ci December 22nd 2014, 1:38 am | |
| - ZSmachines wrote:
- I have always thought that it would be cool to make a "hemi" head for these... it would still be a flathead but have the headshape of a hemi.
That would be sweet. | |
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redlinemotorsportts Moderator
2014 Build-Off Entrant
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Age : 27 Join date : 2013-03-18 Points : 7435 Posts : 3131 Location : raleigh nc
| Subject: Re: Briggs Opposed Build 46ci December 22nd 2014, 11:19 am | |
| - willysjeepmb wrote:
- ZSmachines wrote:
- I have always thought that it would be cool to make a "hemi" head for these... it would still be a flathead but have the headshape of a hemi.
That would be sweet. Like the outside covor like a heim or a actual hemispherical combustion chamber? | |
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ZSmachines Member
2015 Build-Off Entrant
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Age : 25 Join date : 2014-08-27 Points : 3944 Posts : 221 Location : PNW
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redlinemotorsportts Moderator
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 27 Join date : 2013-03-18 Points : 7435 Posts : 3131 Location : raleigh nc
| Subject: Re: Briggs Opposed Build 46ci December 22nd 2014, 8:43 pm | |
| - ZSmachines wrote:
- i was thinking like making a hemispherical head, in theory it would work...
What? Wrong engine family bub! | |
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ZSmachines Member
2015 Build-Off Entrant
2015 Build-Off Entrant
Age : 25 Join date : 2014-08-27 Points : 3944 Posts : 221 Location : PNW
| Subject: Re: Briggs Opposed Build 46ci December 23rd 2014, 1:21 pm | |
| nono, it would still be a flathead, but you could just take and remove a lot of the head's material to make it into a "hemi" head and then deck it to regain lost compression. | |
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redlinemotorsportts Moderator
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 27 Join date : 2013-03-18 Points : 7435 Posts : 3131 Location : raleigh nc
| Subject: Re: Briggs Opposed Build 46ci December 23rd 2014, 1:25 pm | |
| - ZSmachines wrote:
- nono, it would still be a flathead, but you could just take and remove a lot of the head's material to make it into a "hemi" head and then deck it to regain lost compression.
Hemispherical heads only work on ohv's because of flow probably. Nothing the same about ohv and flat head motors when it comes to combustion chambers, so im not sure where youre going with this | |
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ZSmachines Member
2015 Build-Off Entrant
2015 Build-Off Entrant
Age : 25 Join date : 2014-08-27 Points : 3944 Posts : 221 Location : PNW
| Subject: Re: Briggs Opposed Build 46ci December 23rd 2014, 3:08 pm | |
| i was talking about just taking the traditional headwork a step further and then you can say "my mower has a hemi in it"
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fast adam Member
Join date : 2014-07-21 Points : 3811 Posts : 64
| Subject: Re: Briggs Opposed Build 46ci December 23rd 2014, 3:13 pm | |
| hemis have a rounded piston so they fit close to the head,and make higher compression. So it would only work with a ohv head because its round-ish so....how would you make it a hemi do they sell rounded pistons? would the head need any special attention? | |
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ZSmachines Member
2015 Build-Off Entrant
2015 Build-Off Entrant
Age : 25 Join date : 2014-08-27 Points : 3944 Posts : 221 Location : PNW
| Subject: Re: Briggs Opposed Build 46ci December 23rd 2014, 3:19 pm | |
| yeah you would need a special piston.. depending on if you have access to a lathe you could make your own from a chunk of billet aluminum! but i still think it would be cool to be able to say that you have a hemi in your mower
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fast adam Member
Join date : 2014-07-21 Points : 3811 Posts : 64
| Subject: Re: Briggs Opposed Build 46ci December 23rd 2014, 3:35 pm | |
| sorry to highjack you forum for a minute here but has you ever tried drilling the rings on the piston to get more hp | |
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ZSmachines Member
2015 Build-Off Entrant
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Age : 25 Join date : 2014-08-27 Points : 3944 Posts : 221 Location : PNW
| Subject: Re: Briggs Opposed Build 46ci December 23rd 2014, 3:41 pm | |
| not sure if i am understanding you right, but wouldnt drilling the piston rings just give the engine a ton of blowby into the crankcase?
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fast adam Member
Join date : 2014-07-21 Points : 3811 Posts : 64
| Subject: Re: Briggs Opposed Build 46ci December 23rd 2014, 3:51 pm | |
| no you just take a pison without any rings in it and drill a little notch at the top of the grove the ring sits in then the presser of the cylinder helps to push the rings into the cylinder wall and it should help you make a little extra power. | |
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ZSmachines Member
2015 Build-Off Entrant
2015 Build-Off Entrant
Age : 25 Join date : 2014-08-27 Points : 3944 Posts : 221 Location : PNW
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fast adam Member
Join date : 2014-07-21 Points : 3811 Posts : 64
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redlinemotorsportts Moderator
2014 Build-Off Entrant
2014 Build-Off Entrant
Age : 27 Join date : 2013-03-18 Points : 7435 Posts : 3131 Location : raleigh nc
| Subject: Re: Briggs Opposed Build 46ci January 16th 2015, 5:28 pm | |
| Finally, i win! Getting cleaned up. I have the block on its side ready for the crank case bolted back on. Can i make a gasket from a sheet of gasket maker? Also I cannot find chopper sheets for the life of me! Will other metals substitute? And do you have to deck the surface for a head gasket swap? | |
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