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Farmall & IHC Tractors Discussion Forum
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Converting a 450 LP to Gas

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Albert Pereira

08-22-2007 12:50:27




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How hard is it to convert a 450 LP to Gas. Is it just the tank and Carb or does the distributor need to be changed also? What are the advantages of LP over Gas or Gas over LP???

Thanks, Albert




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John A.

08-23-2007 06:17:19




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 Re: Converting a 450 LP to Gas in reply to Albert Pereira, 08-22-2007 12:50:27  
Albert, STOP!!! Before you start Butchering this old girl, Step back and rethink this through, There were not that many 450 LPs made. This tractor is worth way more as an LP than a Gas. Go back and check my post on your question a couple of pages back. Try that then lets visit.
You said it was useing a gallon of oil/tank of fuel that is waaay beond a "little oil useage" this enngine needs an overhaul now! I urge you to rethink this idea!
Later,
John A.

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Albert Pereira

08-23-2007 10:35:14




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 Re: Converting a 450 LP to Gas in reply to John A., 08-23-2007 06:17:19  
John, I'm going to try the starting with the fuel off. The problem is I know nothing about the LP system, so when it doesent work I feel helpless. Fueling is not a problem I spent the money for the hose and valve on the large tank so I can fill it my self. How hard is it to do an overhaul on one of these? I there a book available that will give me the specs on how to do it? I am on a limited budget so I have to do as much as I can myself. Thanks for the Help. Albert

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John A.

08-23-2007 20:39:56




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 Re: Converting a 450 LP to Gas in reply to Albert Pereira, 08-23-2007 10:35:14  
Albert, 10:25 Thur nite,..... Your engine is a running engine So a basic overhaul is needed. you may be able to get by by with just running a Ball hone in the cylinder and reringing the pistons. But you have the engine at least to the point where, if you do not chech everything out you will probably be back in the engine to fix something else.
Put a mic to the mains and check to see what it measures. Are the areas where the main bearins are, are they round, egg shaped or just what.
LPs useally do not have much wear, so there is a good chance that the bottom of the engine is OK. you may very well have a broken ring or two. OR it could be on the verge of really shelling out on you and really cost you a ton of $$$$ to fix.
Call me, my Cell # is 512-577-3837. I can better visit about this than type-talk. Look forward to visiting about your 450.
Later,
John A.

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Albert Pereira

08-24-2007 11:32:58




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 Re: Converting a 450 LP to Gas in reply to John A., 08-23-2007 20:39:56  
well I tried the turning over the engine and cracking the vapor valve and it wouldn't start. I called the place in Oklahoma and there rebuild kit for the regulator is $70.00. But is this the problem? From what I thopught you guys said was that if the regulator was bad that trying to start the 450 with the engine cranking and cracking the valve that if it started this way then it was a bad regulator. Is the regulator and vaporizor the same thing??? What else could the problem be? What can I expect to pay for a complete overhaul? Thanks, Albert

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John A.

08-24-2007 12:32:42




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 Re: Converting a 450 LP to Gas in reply to Albert Pereira, 08-24-2007 11:32:58  
Albert Call me! There is waaaayyyyy y tooooo much stuff to sort out! Anytime this PM or over the weekend. I will do my best to help you.
Later,
John A



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Steven f/AZ

08-22-2007 15:51:13




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 Re: Converting a 450 LP to Gas in reply to Albert Pereira, 08-22-2007 12:50:27  
With LP you can run longer oil change intervals and the oil will stay cleaner longer because no liquid fuel can get into the crankcase. I am personally a fan of LP or natural gas, but re-fueling can be a pain. LP and natural gas also burn cleaner and produce fewer emissions.



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+jakee

08-22-2007 15:36:36




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 Re: Converting a 450 LP to Gas in reply to Albert Pereira, 08-22-2007 12:50:27  
i belive the LP-450 if it still has the good LP-head on it was only 8-1 compresion, you might want to run it up with a advance timing ligt and start at about 36 degreeze total advance at 1600 rpm,s remember when compresion goes up timing usaly needs to come back, i have built a few of these for pulling and run the copresion as hi as 14.1 then had to watch for spark knock,ran those at around 34 degreze with tarco fuel,just watch what your doing and you should feel the diffrence in the seat of your pants,lp-manifold is a + unless you use it in the winter time then it will ice , there is no profesion for the heat on a true 450-LP motor.

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MJF

08-22-2007 15:32:42




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 Re: Converting a 450 LP to Gas in reply to Albert Pereira, 08-22-2007 12:50:27  
It's easy I did it with an M of mine. The LP manifold is a better manifold I wouldn't change it. You should have a real good working tractor when your done. When I tore my LP engine down it was like new from all the years of running LP.



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Albert Pereira

08-22-2007 18:56:04




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 Re: Converting a 450 LP to Gas in reply to MJF, 08-22-2007 15:32:42  
Well this one is a little tired it will burn about a gallon of oil per tank of fuel when its working pretty hard. Also it would foul two of the plugs with a black crusty stuff after just a short while. It has the LP head and a LP manifold. I want to get a little more power out of it. Can I get more power out of it with gas verse LP? I know it is getting close to needing an overhaul, I just don't know what parts and where to order them from to be able to get more power out of it. I don't want to make it a puller just run a little hotter on the farm.

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MJF

08-22-2007 19:55:40




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 Re: Converting a 450 LP to Gas in reply to Albert Pereira, 08-22-2007 18:56:04  
You might get lucky and just put rings in it.



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NDS

08-22-2007 13:39:24




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 Re: Converting a 450 LP to Gas in reply to Albert Pereira, 08-22-2007 12:50:27  
I have converted M back to gasoline and essentially all I did is remove LP equipment and put on gasoline tank lines and carburator the maniflods are different and probaly should be changed but it runs OK with LP manifold. If 450 is factory LP compression may be high enough to require premium fuel. The thing that convinced most to go to LP back in fiftys and sixtys was that fuel was a lot cheaper but that is not so today. Engine in LP tractor will usually run a lot longer than gasoline tractor too.

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