Engine building is your forte. Not saying you can't weld or troubleshoot but you are just soooo comfortable taking a pile of parts and building something that will run better than when it came from the factory. Hats off to you. FYI, I don't know if you have changed the position of the mike but it doesn't sound like you are slamming parts around so much anymore.
it all depends on what is being fixed and the load you are going to put onto it. just plugging the hole will work at times. welding can be a bad thing. tatro
Thanks for posting these videos-I’ve learned a lot watching. Question on the balancing holes: will drilling on only one face to balance the wheel induce a side to side imbalance between the inside/outside or does it not matter enough to worry about?
there is no way to drill from the inside out on center of the flywheel. the deeper the hole is the more you are getting to be on center. being only 5/8" off center at worse, there is no way you are going to feel that at only 7000rpm. being .001 out of true would make way more of a difference. that is why having a true crank is so important. tatro
Mallory metal to increase weight on the light side? It's been decades since I worked in an automotive machine shop but I do remember the drill and slug on crankshafts
lead is way cheaper and works good in my harleys. harley has lots of metal to work with so we don't need the expensive tungsten. all you need to do if you want to is put the metal back that they drilled out. than its just a simple balance job. tatro
for harley motors here are the common percentages use in flywheel balancing. 50,52,55,56,58,60,62,65,68,70. when you start talking percentage of change you are making a big differeance in you bob weight. it can be ounces of change, not just a few grams or differance. for me, the highter the pison speed is, the higher the percentage i am going to use. s&s use to use 60%, they now use more in the 55 to 56% range. ultima is closer to 50-52% range. they don't give you this info, you have to measure what they give you in parts and guess what they are doing. the real key to all of this is to have a strong straight flywheel assembly. every .001 out of ture you go, the more its going to vibrate. same deal on the rods. another big factor in vibration is how strong your frame is and how tight your motor is bolted into it. loose and weak frames vibrate more than stonger ones. tatro
that would be the percentage of the reciprocating weight. the rotating weight is always 100 percent. i have gone over this lots of times in my motor builds. look in the playlist. i guess i need to make a how to do it series on flywheel balancing. tatro
@@TatroMachine Big thanks for answering both of my questions. And for the time and detail you shared with me. I always look to learn new things and have better understanding of what is being done. Thanks so much and I enjoy the information you share in you videos. Are there times when you actually weigh the rods, rings, piston and piston pins to make a custom bob weight or would that be overkill? Is this to many questions?
to save the customer money i just use premade weights that get you close to what is needed. if you want it to be just for your money than you have to spend the time and weigh everything and get the real numbers. tatro
You should be charging for this KT. You have taught me so much over the years, I can’t thank you enough.
Don't tell him that, he'll increase his prices!
that is what my shirt sales and donation links are for.
tatro
Engine building is your forte. Not saying you can't weld or troubleshoot but you are just soooo comfortable taking a pile of parts and building something that will run better than when it came from the factory. Hats off to you. FYI, I don't know if you have changed the position of the mike but it doesn't sound like you are slamming parts around so much anymore.
Amazing amount of diligence. This kind of ability is becoming lost
that is what the videos are for. teaching the future mechanics.
tatro
When would you consider making/welding plugs in to "fix" incorrectly placed holes?
it all depends on what is being fixed and the load you are going to put onto it. just plugging the hole will work at times. welding can be a bad thing.
tatro
Thanks for posting these videos-I’ve learned a lot watching.
Question on the balancing holes: will drilling on only one face to balance the wheel induce a side to side imbalance between the inside/outside or does it not matter enough to worry about?
there is no way to drill from the inside out on center of the flywheel. the deeper the hole is the more you are getting to be on center. being only 5/8" off center at worse, there is no way you are going to feel that at only 7000rpm. being .001 out of true would make way more of a difference. that is why having a true crank is so important.
tatro
@@TatroMachine thanks for the reply. Explained that way it makes sense why it’s done that way.
good job as always ,
What became of the rest of the build? Sorry had to ask. Great work as normal. :)
mom happened. she is in bad health and needs more of my time. i will be getting back onto this and other of my jobs soon.
tatro
Mallory metal to increase weight on the light side? It's been decades since I worked in an automotive machine shop but I do remember the drill and slug on crankshafts
lead is way cheaper and works good in my harleys. harley has lots of metal to work with so we don't need the expensive tungsten. all you need to do if you want to is put the metal back that they drilled out. than its just a simple balance job.
tatro
Not sure I got this, the higher the balance factor, the smoother at lower RPM? Or am I ass backwards on this? Thanks
for harley motors here are the common percentages use in flywheel balancing. 50,52,55,56,58,60,62,65,68,70. when you start talking percentage of change you are making a big differeance in you bob weight. it can be ounces of change, not just a few grams or differance. for me, the highter the pison speed is, the higher the percentage i am going to use.
s&s use to use 60%, they now use more in the 55 to 56% range. ultima is closer to 50-52% range. they don't give you this info, you have to measure what they give you in parts and guess what they are doing. the real key to all of this is to have a strong straight flywheel assembly. every .001 out of ture you go, the more its going to vibrate. same deal on the rods.
another big factor in vibration is how strong your frame is and how tight your motor is bolted into it. loose and weak frames vibrate more than stonger ones.
tatro
Balance factor percentage is percentage of what?
that would be the percentage of the reciprocating weight. the rotating weight is always 100 percent. i have gone over this lots of times in my motor builds. look in the playlist. i guess i need to make a how to do it series on flywheel balancing.
tatro
@@TatroMachine Big thanks for answering both of my questions. And for the time and detail you shared with me. I always look to learn new things and have better understanding of what is being done. Thanks so much and I enjoy the information you share in you videos. Are there times when you actually weigh the rods, rings, piston and piston pins to make a custom bob weight or would that be overkill? Is this to many questions?
to save the customer money i just use premade weights that get you close to what is needed. if you want it to be just for your money than you have to spend the time and weigh everything and get the real numbers.
tatro
@@TatroMachine Thanks.