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farmall99
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Joined: 18 Sep 2012
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 Posted: Tue Sep 18, 2012 10:18 am Post subject: Whats next? |
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Alright guys, I have an M Farmall and I'm looking for opinions on what I need to do. Tractor has 4 1/8" pistons, propane head and a modded governor. Dynos in the 70 hp range with 110 hot gas. Looking for more power and was wondering if I need to step up the carb or start looking at cams. Any advice is greatly appreciated. Thanks Zach
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Dodgeit
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Joined: 05 Mar 2009
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| Posted: Tue Sep 18, 2012 10:27 am Post subject: Re: Whats next? |
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Unless your well past 10-1 compression, your using the wrong fuel. Up to 10 -1 I would use 92-93 octane. Below 9-1 I would run regular unleaded.
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bp4455
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Joined: 14 Apr 2012
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| Posted: Tue Sep 18, 2012 11:54 am Post subject: Re: Whats next? |
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unless you can turn open rpms thats the limit. its
time to add some cubes
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farmall99
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| Posted: Tue Sep 18, 2012 6:35 pm Post subject: Re: Whats next? |
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Well our rules around here are pretty lax, so rpm's is not a factor. Had been toying with the idea of running dual h carbs, also have a JD 3020 carb too to play with as well. Just looking for some opinions on what to do on the cheap if possible.
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jd b puller
Tractor Expert
Joined: 07 Jul 2001
Posts: 3165
Location: North Carolina
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| Posted: Tue Sep 18, 2012 9:27 pm Post subject: Re: Whats next? |
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How much cylinder pressure do you have?
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High Octane
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Joined: 27 Feb 2007
Posts: 237
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| Posted: Wed Sep 19, 2012 6:56 am Post subject: Re: Whats next? |
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find a W9 carb, or have your current carb bored out to use a 806 butterfly. a 33 or 35 venturi, if your at 200psi or less the 110 fuel is killing your torque curve. think of 50/50 mix of 87 n E85 for better results. then maybe have a cam built by Bullet.
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farmall99
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| Posted: Wed Sep 19, 2012 9:42 am Post subject: Re: Whats next? |
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Last time we checked it had around 220 psi cranking compression if I remember right. It also seemed to detonate with 93 gas and when bumped up to 110 all of it went away.
Last edited by farmall99 on Wed Sep 19, 2012 9:43 am; edited 1 time in total |
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High Octane
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Posts: 237
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| Posted: Wed Sep 19, 2012 11:12 am Post subject: Re: Whats next? |
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no doubt shed knock on 93 alone. 110 is a fast, hot burning fuel. you want a cool, slow burning fuel to keep the explosion pushing down, longer, timewise, vs a quick flash fuel. 87 n e85 will run 275psi at 50/50 mix. if you can get it try it n dyno it. its worth the effort. then start leanin the ethanol with more gas till you find the perfect octane n makes the most power. been there, done it. could be worth 10hp or more if you play with this type of fuel. if not, keep runnin 110 n live with what ya got.
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LarryM
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Joined: 27 Jul 2008
Posts: 455
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| Posted: Wed Sep 19, 2012 5:20 pm Post subject: Re: Whats next? |
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I have a 301 carb that my size 36 venturi came out of. I will have to look at that butterfly! Thank You!
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farmall99
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| Posted: Wed Sep 19, 2012 6:56 pm Post subject: Re: Whats next? |
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Hmm may have to look into the 806 butterfly and bigger venturi
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