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Barroll
MMT F.E.
Joined: Fri Jan 15, 2010 10:19 am
Posts: 932
Location: Georgia
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 single mikuni vs IM heads I have a 35 mudbuddy and I am looking to give it some more power. What is the best upgrade to do first? heads or carb? I know briggs has some issues with their valves not seating properly from the factory so Im kinda leaning toward the heads and do a few minor things to the stock carb. Maybe putting a new cam in. Anyway what would yall do first? I am mainly concerned with load carrying and reliability rather than speed.
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1848 Prodigy
35 GTR
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| Mon May 09, 2011 11:26 am |
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OwenDickeson
MMT Elite Member
Joined: Wed Mar 11, 2009 12:45 pm
Posts: 9869
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Re: single mikuni vs IM heads Do heads and exhaust first and see if that gets you what you need.
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| Mon May 09, 2011 11:27 am |
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Barroll
MMT F.E.
Joined: Fri Jan 15, 2010 10:19 am
Posts: 932
Location: Georgia
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Re: single mikuni vs IM heads
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1848 Prodigy
35 GTR
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| Mon May 09, 2011 11:33 am |
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saveontaxes
MMT Pro Member
Joined: Sat Aug 29, 2009 10:16 am
Posts: 400
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Re: single mikuni vs IM heads I have carbs, (Twin 30's) evt ported heads, w/roller rockers, duals. I have a 48 lower sprocket, had 6 northerners, or 3 southerners,(950lbs) peeps ,+ 3 pups, 2- coolers, 6 gals gas, etc) in there saturday, up 7mph river and cant keep it off the 4350 rev limiter. Runs great.
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Gator Trax 1854 ran over by drunk driver!! ( boat less)
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| Mon May 09, 2011 12:12 pm |
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muddawgchuck
MMT F.E.
Joined: Fri Oct 01, 2010 9:22 pm
Posts: 959
Location: Spurger Tx.
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Re: single mikuni vs IM heads Wondering the same thing 
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18x54 WC custom
36PD EFI
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| Mon May 09, 2011 12:32 pm |
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deadbird8
MMT 1000 Club
Joined: Wed Feb 04, 2009 7:50 pm
Posts: 3833
Location: Old East Dallas, Texas
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Re: single mikuni vs IM heads Given the variability in the stock Briggs heads and valve seat, do the IM heads first. Yes they are decked and have oversized one-piece stainless valves. See where you are (as Owen stated) and see if you need to do more. The heads are the best power bang for the $$
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Excel 1851F4 w/ MB35HD+R CDI with a little bit of this and little bit of that
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| Tue May 10, 2011 9:55 pm |
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T-Bubba
MMT 1000 Club
Joined: Wed Feb 18, 2009 6:43 pm
Posts: 3958
Location: Centerville, La
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Re: single mikuni vs IM heads heads for sure...
I just had my stock heads and valves lapped and with the evt exhaust it made a big difference!
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I gave up mud motors
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| Tue May 10, 2011 10:02 pm |
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Barroll
MMT F.E.
Joined: Fri Jan 15, 2010 10:19 am
Posts: 932
Location: Georgia
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Re: single mikuni vs IM heads I think im going to end up doing heads and cam and do some minor mods to my stock carb.. I think this will get me where I want to be power wise.
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1848 Prodigy
35 GTR
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| Thu May 12, 2011 11:11 am |
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