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need more 720 gas HP


 
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720deere puller
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Joined: 16 Dec 2012
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PostPosted: Sun Dec 16, 2012 5:36 pm    Post subject: need more 720 gas HP Reply to specific post Reply with quote

Needing contact info or any info on increasing hp on a stock 720 gas, pulling in 8500 & 9500lb. classes. Any help would be greatly appreciated.
 
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Josh Blackburn
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PostPosted: Sun Dec 16, 2012 6:41 pm    Post subject: Re: need more 720 gas HP Reply to specific post Reply with quote

How much power are you looking for. I have a real nice set of lp pistons. They will be a quick and easy 10 hp they Look brand new or can do something more. 9892775366
 
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buickanddeere
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PostPosted: Mon Dec 17, 2012 1:20 pm    Post subject: Re: need more 720 gas HP Reply to specific post Reply with quote

Higher compression. Re-ground camshaft. Port and manifold matching. Blend and smooth casting flash and sharp edges from the inside of the ports. A professional 5 angle valve job by a race engine shop, not a valve job by Bubba . Dry air cleaner element . Propane intake and exhaust manifolds.
Will make an easy 75HP at pto rpm.
 
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Dblair
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PostPosted: Mon Dec 17, 2012 1:35 pm    Post subject: Re: need more 720 gas HP Reply to specific post Reply with quote

there was a post on this forum a couple years ago where a guy said he went to 77 hp with the addition of diesel pistons . take it for what it's worth could just be hear say . that's a 22 hp jump from stock .
 
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buickanddeere
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PostPosted: Tue Dec 18, 2012 10:27 am    Post subject: Re: need more 720 gas HP Reply to specific post Reply with quote

Maybe onto something? The gas and diesel used the same 6-3/8 inch stroke. The diesel bore is 125 thou larger at 6-1/8".
Must have required some high octane fuel, couldn't even guess the compression ratio.
720AF 4.9 to 1, 720gas 6.14 to 1 and 720LP 7.94 to 1.
Even the LP pistons are an 29% ratio increase over the gas.
 
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Lee DePew
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PostPosted: Thu Dec 20, 2012 3:05 pm    Post subject: Re: need more 720 gas HP Reply to specific post Reply with quote

how big of a stroker crankshaft would fit in a 720 gas was a propane tractor converted
 
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jd b puller
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PostPosted: Thu Dec 20, 2012 3:14 pm    Post subject: Re: need more 720 gas HP Reply to specific post Reply with quote

Lee, as far as I know it's the same as a G/70 as far as how much you CAN stroke it.

Stroke + journal = 13.375" I'm sure someone has gone bigger, that's worked for me.
 
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Lee DePew
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PostPosted: Thu Dec 20, 2012 3:31 pm    Post subject: Re: need more 720 gas HP Reply to specific post Reply with quote


thank you for the info greatly appreciated!!!!!
 
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