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 Post subject: FL350 Intake Manifold
PostPosted: Sun Mar 30, 2014 3:13 pm 
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Joined: Mon Feb 03, 2014 1:01 pm
Posts: 14
Location: Roseville, CA
Not wanting to totally hijack Hoser's 3D printing discussion I thought I would start a new project thread about making a FL350 intake manifold. Disclaimers - This is my 1st FL350 and I have never worked on one before. I am not sure what is stock and what isn't. I am not a mechanic/fabricator/machinist nor do I have too much experience working with 2-stroke engines but I am crazy enough to do things like this.

When I finally got around to looking at my carb setup a bit more closely, I saw that I already have an aftermarket intake manifold like in Hoser's pic. Since my rubber adapter attaching the carb to the manifold is cracked, all I need to do is get a new adapter. I believe I have a Mikuni 38mm flatslide carb as its made by Mikuni, has a flatslide butterfly, and the carb outlet ID is 38mm. I am going to get an adapter so I can get the thing back together. But I still want to try and make my own intake just to say I did it (I am still fascinated at making useful parts on a CNC mill) but also to see if I can get a better match between parts along the intake path.

So I ordered an Oddatv intake as soon as I got my oddy without knowing/looking at the intake setup. So I now have what I am assuming is a stock intake manifold setup. This has the carb offset to one side of the intake. I also have my current intake manifold where the carb is centered. There is a huge difference between the 2 manifolds in the shape of the backside where they mate to the reed cage. I am going to try and copy my current straight/centered intake. My retired machinist buddy has a foundry he uses in Stockton (about an hour away) to cast aluminum parts. I will probably just hack the manifold out of a block of aluminum and may also explore making a mold/pattern and having it cast (like mine is). I will try to maintain dimensions and angles that my intake has.
Here are my questions so far:
1. Is my reed cage intake shape stock?
2. Is the offset only needed in a stock setup?
3. Where is a good place to get the rubber carb adapter?


Attachments:
intake maifold.jpg
intake maifold.jpg [ 56.3 KiB | Viewed 1127 times ]
Back intake manifold.jpg
Back intake manifold.jpg [ 46.15 KiB | Viewed 1127 times ]
oddatv intake 2.jpg
oddatv intake 2.jpg [ 25.67 KiB | Viewed 1127 times ]
Backside oddatv intake.jpg
Backside oddatv intake.jpg [ 28.76 KiB | Viewed 1127 times ]
Intake shape.jpg
Intake shape.jpg [ 36.36 KiB | Viewed 1127 times ]
carb.jpg
carb.jpg [ 19.93 KiB | Viewed 1127 times ]
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PostPosted: Sun Mar 30, 2014 5:54 pm 
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Joined: Mon Jul 19, 2010 3:20 pm
Posts: 1718
Location: saskatoon, sk, canada
the stock ones were offset to the side


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PostPosted: Mon Mar 31, 2014 8:44 am 
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Joined: Tue Jan 10, 2012 10:21 am
Posts: 2681
Location: NW Ohio / SE Michigan
Not to bash Odd, but that rubber is ugly! For the $ price, I'd expect a piece of artwork. Then again, I have been known to be a needy / picky customer. ;)

Careful when trying to match up the outlet side of the 'centered' intake with your reed cage / stuffer. Going from a circle to rectangle...you can run into some wall thickness problems really fast.


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PostPosted: Mon Mar 31, 2014 10:52 am 
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Joined: Wed Jan 14, 2009 2:10 am
Posts: 4678
Location: Carson City NV
Pyrodude,

Just curious as to what has been done to make the carb clear the left side Engine to transmission mount.

Also what has been done to connect to the air box.

Thanks, Rand


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PostPosted: Wed Apr 02, 2014 1:22 pm 
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Joined: Tue Jan 10, 2012 10:21 am
Posts: 2681
Location: NW Ohio / SE Michigan
By the way...you can get the rubber carb flanges at Parts Unlimited, Denis Kirk http://denniskirk.com, MfgSupply, Amazon, and evilBay. Look for "Mikuni carb flange" or look at the chart (below) and then search the net with the part no. for the best deal.

IMO, the Kimpex ones and whatever PU carries look cheap, and nowhere are their dimensions listed. I like the Minuki-branded ones a lot better and generally only run like $5-$6 more.

If you're not running a Mikuni carb (i.e. keihin), just check the Mikuni flange size chart and then a site like sudco.com for the Keihin carb dimensions.


Attachments:
mikuni_Carb_Flanges.jpg
mikuni_Carb_Flanges.jpg [ 54.32 KiB | Viewed 1055 times ]
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PostPosted: Wed Apr 02, 2014 1:44 pm 
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Joined: Sat Mar 03, 2012 11:45 pm
Posts: 3610
Location: CHICO,CA
Pyrodude
Where u located out of ?


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PostPosted: Wed Apr 02, 2014 6:41 pm 
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Joined: Mon Dec 15, 2003 2:40 pm
Posts: 22512
Location: Chicago
Buy only the he Minuki-branded manifolds the rubber is so much better and last longer.


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PostPosted: Thu Apr 03, 2014 11:24 pm 
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Joined: Tue Jan 10, 2012 10:21 am
Posts: 2681
Location: NW Ohio / SE Michigan
BREAKING NEWS...

http://www.pilotodyssey.com/PO/viewtopic.php?f=104&t=13980


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PostPosted: Mon Apr 07, 2014 12:11 am 
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Joined: Mon Feb 03, 2014 1:01 pm
Posts: 14
Location: Roseville, CA
B S wrote:
Pyrodude
Where u located out of ?

I am in Roseville.


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PostPosted: Mon Apr 07, 2014 12:13 am 
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Joined: Sat Mar 03, 2012 11:45 pm
Posts: 3610
Location: CHICO,CA
Pyrodude wrote:
B S wrote:
Pyrodude
Where u located out of ?

I am in Roseville.

Sweet imma outta Chico


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PostPosted: Mon Apr 07, 2014 12:13 am 
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Joined: Mon Feb 03, 2014 1:01 pm
Posts: 14
Location: Roseville, CA
DMoneyAllstar wrote:


Looks Good!


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