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Gpower
12-19-2002 06:54:23
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Re: Re: Re: 830 camshaft in reply to smoker , 12-18-2002 08:14:06
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Smoker,
I am not sure about how much of a grind to do on the R camshaft. There are some aggressive cams built for the R-830's but you have trouble timing them, so Ive heard. With the 730 pistons, stock R head and valves, 13mm pumps, 730 injector tips and a good rebuild on the pumps and injectors, you should get 75-80 out of her. As far as the cam goes, I would set the timing as outlined in the book, with a dial indicator and start from there. It says the valve should be opened 25 thousanths at TDC, I would shoot for it to be open around 15 thousanths. It is easy to adjust the timing on the r-830 due to the way the gear goes onto the end of the camshaft. If you want more HP, the best money you could spend is on the head. Port and polish the head, you may find some bigger valves to go with it, the only problem is how the injector tubes and injectors are mounted into the head, so you are limited on how big you can go. As far as cutting the piston tops, I have heard of them doing this so that the valves would clear. I also know of tractors running around that arent cut and doing ok. Just put the head on with out the gasket and roll it over and see what happens. you can always get a thicker gasket made to put where the block bolts to the crankcase, allowing the block to move forward some more, if you need a few more thousanths clearance. Well, hope this gives you some ideas. Good luck
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