Author Topic: Everything you ever wanted to know about modifying a 3 hp Briggs..here..  (Read 14888 times)

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Offline offroadwhatever8

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Re: Best Dremel Grinding Wheel for Porting
« Reply #15 on: February 05, 2007, 12:45:03 pm »
How long did that take?

Offline mike

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Re: Best Dremel Grinding Wheel for Porting
« Reply #16 on: February 05, 2007, 04:06:48 pm »
are you using a 3hp on a rider  :omg:

Offline matt25001149

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Re: Best Dremel Grinding Wheel for Porting
« Reply #17 on: February 05, 2007, 04:41:15 pm »
i dont think he is but my dad had a front mower rear steer mower with a 5 hp on it and that thing had balls man
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Offline offroadwhatever8

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Re: Best Dremel Grinding Wheel for Porting
« Reply #18 on: February 05, 2007, 04:49:05 pm »
lol, they do. People always under estimate those engines but they can haul  :censored:. My huffy has a 5 hp briggs in it and it will pull me around where ever i want.

Offline ryf

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Re: Best Dremel Grinding Wheel for Porting
« Reply #19 on: February 05, 2007, 05:01:37 pm »
unless your a big boy (like me) 3-5hp has been powering go carts for as long as I remember. I think the bigger motors really help more with not bogging when mowing grass, and full out racing of course.

with some 4hp weighing in at 32lbs, 3.5hp at 26lbs with a light rider would probably be pretty fun, especially good handling if it found itself on a light well setup mower too.... learn how to weld aluminum, and make the AlumiMower!

Offline offroadwhatever8

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Can I do Advanced Timing on My 3 HP Briggs???
« Reply #20 on: February 05, 2007, 05:02:58 pm »
After a shaved head and porting, how much would advanced timing help? Is it even possible with such a little motor? Im new with advanced timing, so please help. Also, where is a good place to buy the fly wheel keys? Thanks John

Offline offroadwhatever8

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Re: Best Dremel Grinding Wheel for Porting
« Reply #21 on: February 05, 2007, 05:16:45 pm »
well, if its going on any mower is the huffy. The huffy is real light and real small.









Offline mowdak1

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Re: Tecumseh carb on 3 hp briggs
« Reply #22 on: February 05, 2007, 05:34:02 pm »
I would think there to be an unlimited number of options in the 5hp Briggs carb considering the availability of kart carburetors out there in the world. Might be a better option and you may well be able to find an adapter for this combination out there also.

Offline offroadwhatever8

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Re: Tecumseh carb on 3 hp briggs
« Reply #23 on: February 05, 2007, 06:07:28 pm »
Thanks Rocky  :)

Offline DanW

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Re: Best Dremel Grinding Wheel for Porting
« Reply #24 on: February 05, 2007, 08:11:31 pm »
I used a $15 Forney carbide burr on a Honda D block to notch the bottom of the cylinder walls out, when porting the manifold to the exhaust gasket size, and on my turbo exhaust inlet.  That thing is a fricken beast.  Not any aluminum from the block stuck in it, and it zips through cast and steel like it's butter.

Offline offroadwhatever8

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Re: Best Dremel Grinding Wheel for Porting
« Reply #25 on: February 05, 2007, 08:27:01 pm »
hmmmm, i extremely anxious to port it, from what people been saying, it makes a huge difference. I cant wait to get to it this week.

Offline offroadwhatever8

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How Far Should I Go
« Reply #26 on: February 05, 2007, 09:05:09 pm »
When i port the 3 hp, how much should i take off? im just afraid if i go to far that the fuel may start to "puddle" in the intake. Thanks John

Offline matt25001149

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Re: How Far Should I Go
« Reply #27 on: February 05, 2007, 09:22:23 pm »
dont take any off just clean it up a lil on intake side leave it rough dont polish it
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Offline Steven J

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Re: How Far Should I Go
« Reply #28 on: February 05, 2007, 09:29:14 pm »
Heres an article I found worth reading about porting and polishing its about motorcycles but the concept is there and it all about the ups and downs of porting and polishing http://www.motorcycleproject.com/motorcycle/text/cows-porting.html

Offline mightymowe

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Re: Everything you ever wanted to know about modifying a 3 hp Briggs..here..
« Reply #29 on: February 06, 2007, 06:07:57 am »
Very good article on porting,I believe fuel puddling in the intake has more to do with port velocity,than the finish in the port,and the very best ports are the smallest ports that do the job.
David Peters