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Old 09-18-2006, 09:55 PM   #46
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Quote:
Originally Posted by mugenb46
is work to the crank done with a dremel or am i looking at some very expensive machinery here
Dremel is enough if you want to make engines for yourself or for friends (small quantities). Use diamond bits-they work just great. You can get them practicly in any hardware store. You can get made in Chine cheaper, but they don't last, Dremmel original last way more, but costs is higher. If you ar eplaning to get to moding seriously, then you will need to invest $$$$ to right machines. Not neccessarely CNC, may be conventional but will be high precision grade and pretty expencive.
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Old 09-18-2006, 10:16 PM   #47
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can you help me understand timing on these motors we use for racing,port timming and crank timming, what modding the intake channel on the crank does and making the side ports bigger and the boost port. i also see guys reducing the thickness of the bottom of the sleeve and rounding of the bottom of the sleeve, this must inprove flow of gas and air charge to the cylender yes.
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Old 09-18-2006, 10:23 PM   #48
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LOL My bad, I meant the Piston.
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Old 09-18-2006, 10:29 PM   #49
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I remember now. Another way to do it without the razors. Just get an old crankcase that goes with the crankshaft, and you can use that too. If you go the crankcase way, make sure the theres no oil or grease on the bearings, make sure they're dry.

By the way, i didnt give anything away, I got all that info from EdwardN, there was an old tread where that was discussed, and more.

Ed, YGPM
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Old 09-18-2006, 10:50 PM   #50
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nitrodude,edwardn you guys are top notch thanks so much look forward to talkin more
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Old 09-18-2006, 10:52 PM   #51
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AND MORE
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Old 09-18-2006, 10:53 PM   #52
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Thanks, but really, Edward is the one that told me how to do it, he deserves all the credit.
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Old 09-18-2006, 11:38 PM   #53
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you cant fully balance a single cylinder engine. Just a FYI
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Old 09-19-2006, 11:16 AM   #54
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Thanks guys, this info is great. Looking forward to anymore you might have to share.
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Old 09-19-2006, 11:27 AM   #55
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Quote:
Originally Posted by German Muscle
you cant fully balance a single cylinder engine. Just a FYI

Yeah, one cannot fully balance these engines, but isn't the trick trying to get it as close as possible to reduce vibrations and increase efficiency?

So we would need some kind of setup (I'm liking the crankcase method) to help us see/measure the amount of balance in the crankshaft, especially since one of it's main functions is to act as a counterweight/counter balance for the conrod & piston.

If I said anything wrong will someone please correct me.
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Old 09-19-2006, 11:33 AM   #56
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Quote:
Originally Posted by nitrodude
What you do to balance the crank is, you weigh the sleeve/conrod assembly on a very sensitive scale. Then you take that weight and make a sleeve that fits on the crank pin. Then, you take 2 rasors, and set the crank on top of them, you remove (or add) weight until it fails to stop on the same spot everytime.

nitrodude, do you have a pic of this method?
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Old 09-19-2006, 09:15 PM   #57
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nope, im sorry
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Old 09-20-2006, 06:07 AM   #58
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surprisingly most of the engines the factory guys use are not modded. they are all hand matched at the factory. i guess this would mean matching the piston and rod to the crank and also the piston to the sleve.
you would be surprised to see how much extra power you can get
although not everyone is a factory driver
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Old 09-20-2006, 05:28 PM   #59
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warmac....... of coarse he doesn't lol
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Old 09-20-2006, 05:37 PM   #60
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ya.. what the hell you would be suprised how many companies SAY they do that anyway. i bet if i went to novarossi and so did...i don't know josh cyral and both got motors, mine on monday and his on tuesday from the time i pick mine up when i leave the door they are bustin but to make the very best motor for him, not to say novarossi does this because they are bad ass, but i'm sure those pro guys have something done. i bet more do than not. war mac i'm going to build a balencer and i will post it when i'm done. maybe someone can tell me if i did it right, after i spend 20 hours on it lol
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