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Minneapolis Moline Tractors Discussion Forum
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Author  [Modern View]

11-21-2013 19:44:06

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How fast can you run a g705 engine with stiffer valve springs but not a balanced motor?

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steven rudibaugh

11-24-2013 17:57:05

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 Re: RPM in reply to Johnston, 11-21-2013 19:44:06  
We run our over3500 rpms on stock springs.with shims under them..

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11-24-2013 06:20:02

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 Re: RPM in reply to Johnston, 11-21-2013 19:44:06  
Mine is totally stock I I run it 2300 rpm. He's right that timing becomes tricky since the indirect injection is a slow process. At higher rpm it sounds like it needs more timing but as the rpm comes down it falls into its power band and pulls like crazy LOL. The good news is that with the Roosa-Master pump you can quickly and easily adjust your injection timing to find your "sweet spot".

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11-23-2013 05:50:14

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 Re: RPM in reply to Johnston, 11-21-2013 19:44:06  
If its a diesel the limiting factor will be pump timing, unless you go to a newer pump with timing advance.

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11-22-2013 20:50:34

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 Re: RPM in reply to Johnston, 11-21-2013 19:44:06  
For pulling, I wouldn't be afraid of 3000 rpm. For field work, I wouldn't go much over stock.

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