300D flywheel on German Ebay - Page 2 - PeachParts Mercedes-Benz Forum

TheDon · #16 02-16-2009, 12:28 PM

Quote:

Originally Posted by ForcedInduction

Its kinda hard to make a flywheel from scratch just based on the starter ring!

it can be done but it is pricey. MY friend had a custom flywheel milled for his 2jz to delorean motor swap he is finishing up..

lutzTD · #17 02-16-2009, 02:36 PM

I have been searching for one of these for 2 years. The price is about what you will expect to pay iffen you need it right away

BTW, the big chamfer is correct and it is not 2 pieces but one piece weighing 38 pounds, cant comment if this one is cracked. The surface does look a little heated but I have seen that before on perfectly good flywheels that I just had resurfaced. this post was just in case someone wanted one. I doubt you could get one made for $400 unless you know somebody, and even then I would always be worried since these can turn 5000 RPM

winmutt · #18 02-16-2009, 02:41 PM

I saw one that was 2 pieces, it may have been a 616 flywheel but either way it was 2 pieces. Cant be that hard to get a simple circle cast and cut can it?

lutzTD · #19 02-16-2009, 02:47 PM

Quote:

Originally Posted by winmutt

I saw one that was 2 pieces, it may have been a 616 flywheel but either way it was 2 pieces. Cant be that hard to get a simple circle cast and cut can it?

The gear ring is a seperate piece if thats what youre asking, otherwise its one big piece. the 5000RPM is what makes a scratch built one tricky. I am a journeyman toolmaker and could easily machine one, but I would always be worried it would have an inclusion or some other defect that would make it grenade later

diametricalbenz · #20 02-16-2009, 03:40 PM

Just out of curiosity, if one were to reverse engineer it by taking dimensions and calculating the volume, there must be a solid metal that can be used and milled to specification to withstand 5000rpm.

Now if it were 17,000rpm F1 car drivetrain componentry I would then be worried...

lutzTD · #21 02-16-2009, 05:15 PM

Quote:

Originally Posted by diametricalbenz

Just out of curiosity, if one were to reverse engineer it by taking dimensions and calculating the volume, there must be a solid metal that can be used and milled to specification to withstand 5000rpm.

Now if it were 17,000rpm F1 car drivetrain componentry I would then be worried...

its most likely high nickel cast iron, which is slightly less dense than steel. you would need to get an accurate density by measuring the volume and weight and calculate the moment of inertia. then try to duplicate the moment of inertia in steel. Maybe it would be ok to be a little heavier then you could just match the dimensions in steel. either way, if the steel you use has an inclusion or a fault it would become a grenade. for $400 I think its too much risk.

t walgamuth · #22 02-17-2009, 06:25 AM

My memory of my 300d flywheel is that its not quite as deep as that one, though I cannot be sure. I wish now I had pics of it. I didn't realize at the time what a rare object it is.

I agree that that one looks rough, but it could be fine with a good milling. I don't quite understand the scratches on the sides of the drum, I cannot imagine what rubbed there.

lutzTD · #23 02-17-2009, 07:58 AM

Quote:

Originally Posted by t walgamuth

My memory of my 300d flywheel is that its not quite as deep as that one, though I cannot be sure. I wish now I had pics of it. I didn't realize at the time what a rare object it is.

I agree that that one looks rough, but it could be fine with a good milling. I don't quite understand the scratches on the sides of the drum, I cannot imagine what rubbed there.

it looks right to me. I will take a picture of mine when it finally comes back from balance. hopefully this week. I cant find my 240D one, I will try again and take a picture of them side by side. the 300D one is about an inch deeper and also doesnt have the dished out area on the crank side.

vstech · #24 02-17-2009, 08:45 AM

Quote:

Originally Posted by lutzTD

The gear ring is a seperate piece if thats what youre asking, otherwise its one big piece. the 5000RPM is what makes a scratch built one tricky. I am a journeyman toolmaker and could easily machine one, but I would always be worried it would have an inclusion or some other defect that would make it grenade later

so all the bolts around the inner surface of the ring are for what? bolting on the pressure plate? it looks like the "drum" part of the flywheel is separate, and can be removed for milling or what have you...

lutzTD · #25 02-17-2009, 08:56 AM

Quote:

Originally Posted by vstech

so all the bolts around the inner surface of the ring are for what? bolting on the pressure plate? it looks like the "drum" part of the flywheel is separate, and can be removed for milling or what have you...

the inner 12 holes bolt it to the crank, the outer 6 on the first step are bolt holes for the pressure plate. the holes from the side are for securing the flywheel from turning when installing or removing. The other holes are for manufacture or balance, I can assure you this is a one peice assembly other than the starter gear.

diametricalbenz · #26 02-17-2009, 10:50 AM

Quote:

Originally Posted by t walgamuth

My memory of my 300d flywheel is that its not quite as deep as that one, though I cannot be sure. I wish now I had pics of it. I didn't realize at the time what a rare object it is.

I agree that that one looks rough, but it could be fine with a good milling. I don't quite understand the scratches on the sides of the drum, I cannot imagine what rubbed there.

here are pictures

t walgamuth · #27 02-17-2009, 07:16 PM

Yeah, I guess thats about how it looks!