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200hp 310 rods?

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BradWi

01-15-2003 15:39:22




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I'm putting together a 310, doing all the right stuff with balancing,line boring,new wrist pin bushings,etc.I am using the stock pump it is the bigger pump off of an 1855(same model it will run in),but i am running a little bigger turbo.Top loaded rpm will be 3000.high idle will be 3250rpm.This will only be used for pulling and maybe light, light, work.do you think stock rods will hold ok,if they are relieved and shot peened. The gentleman helping me on this estimated around 200 hp.I know this is playing with fire,but i hope she will hold. it is not yet set in stone.So i would appreciate any suggestions.thanks

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WFE

01-15-2003 22:03:41




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 Re: 200hp 310 rods? in reply to BradWi, 01-15-2003 15:39:22  
New rod bolts too, right? They are the most important. I've never built a 310 to 200 hp, as the only way to get there is to use different pump/turbo/injector combination. Have built them to 150 hp with stock rods that were not hardened. Again, the new rod bolts are key, as they keep the cap rigidly attached to the rod and do not flex and fatigue as the original rod bolts did, which placed undue stress on the rod and cap resulting in many failures. Based on others I have talked to, however, who have built the 310 to 200 hp (and beyond), it is wise to have them hardened. Then again, hardening is a science. Get them too hard and they will be brittle and won't stand the pounding. I think you're best having them hardened. I am not entirely sure you will be able to achieve quite 200 hp. The 1855 shares the same injection pump as the 1755. If you want the big pump, you need one off a 1950-T or 1955 as the plunger bore is .03" larger. Doesn't sound like a lot, but it does account for the difference between the 1855 and 1955 stock hp difference. The bigger turbo will certainly help provide the necessary air, but you'll need all the fuel you can get as well. I think with the '19' injection pump, 200 hp should be attainable, particularly at higher rpms. Glad to hear you're working with the 310. Best of luck this season!

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BradWi

01-16-2003 11:15:19




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 Re: Re: 200hp 310 rods? in reply to WFE, 01-15-2003 22:03:41  
Thanks again,I must have a pump off of a 1955 unless my older 1855 has an incorrect pump on it.The pump i am fixing up Has the.637 designation and my older one has the .634 i believe.Where is a good place to get rods hardened? I've checked around madison but no one Knows anything about it. They suggested relieving and shot peening,but I don't understand the advantage of this process.This is the first 310 I have really pushed beyond stock so i am trying to learn as much as possible to do it the best way.I don't want to tarnish the ollie reputation around here and blow it to pieces on the track.

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WFE

01-16-2003 21:55:15




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 Re: Re: Re: 200hp 310 rods? in reply to BradWi, 01-16-2003 11:15:19  
Check with Maibach Tractor in Creston, Ohio. I am sure they know where to have rods hardened as they build quite a few puller engines I believe. Phone 1 800 808 9934. Otherwise, pick up or borrow a copy of "The Hook" magazine. It's a great pulling magazine anyway, and you're bound to find some ads in there for specialty engine rebuilding and work such as rod hardening and custom rod manufacturing, etc. The reason hardening helps is the same reason the new, harder rod bolts help prevent rod failures. The reciprocating rod, particularly at the high speed and relatively short rod length the 310 has, acts as a spring, just as any bolt does under load. The harder the rod, the more resistance it has to deflection under that intense reciprocation, hence less prone to failure. Good luck!

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Jake in NY

01-16-2003 20:52:03




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 Re: Re: Re: 200hp 310 rods? in reply to BradWi, 01-16-2003 11:15:19  
brad, where are you in WI? i knows my tag says i'm from NY, which i am, but i am taking the UW short course so i am in madison til march. i usually bust out of the city every other weekend to see the countryside. it's a little different from the catskill mountains of my childhood. it's rolling, but not mountainous.

jake



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BradWi

01-17-2003 14:31:35




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 Re: Re: Re: Re: 200hp 310 rods? in reply to Jake in NY, 01-16-2003 20:52:03  
I'm about 5 miles out the beltline to the east I can see the big landfill from my house.I took some shortcourse classes about three years ago.Maybe had some of the same instructors you do.I couldn't handle sitting inside that long so I decided to quit school.I had too much work and other stuff to take care on those nice sunny days.Like fixing up my ollies.That of course doesn't do much for my education or my wallet :) my e-mail is [email protected] drop me a line sometime be glad to show you around the local establishments.

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