flywheel ?

rod · 08-11-2012, 05:57 PM

i need a race flywheel for a different engine. my friend has a really good 40 lb Hays, for $90.00 since new 'wheels are so expensive........
what do you think about chucking the 40 lb'er in the lathe and cutting off 10 lbs?
i have a 30 lb Hays, and it appears to me that the 40 is just extra thick toward the friction face side.

your thoughts please.
thanks rod in AZ

BlueOval Ralph · 08-11-2012, 06:09 PM

I used to have 40 pounders machined down to about 28 lbs they were cut from starting at about the dia of the crank and maching toward the outside leaving about a 1 1/2 at the od they act like a heaver wheel Hays called the scollped flywheels.

BillK · 08-11-2012, 06:28 PM

Rod,
Just remember that when you do this the SFI certification goes bye bye

BlueOval Ralph · 08-11-2012, 06:49 PM

Rod you have a private message.

Mark Yacavone · 08-11-2012, 07:16 PM

Yep , can be done.. Some on the crank side as mentioned ,and some across the face.
It's hard to get a good surface on a lathe though. It'll chatter and vibrate. One problem is it's moving faster when you get towards the outside edge.
Finish it up with a flywheel surface grinder.

rod · 08-12-2012, 12:01 AM

thanks for the help. it is hard to do things like this in a small town where nothing like this has been done before.
rod in AZ

Run to Rund · 08-12-2012, 03:01 AM

check ebay. If you will accept off-shore steel (and after all no steel is still made here anyway), you should be able to find a cheap new wheel in the 30 lb. range.

08-11-2012, 05:57 PM	#1
rod Member Join Date: Dec 2009 Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66 Posts: 313 Likes: 0 Liked 20 Times in 15 Posts	flywheel ? i need a race flywheel for a different engine. my friend has a really good 40 lb Hays, for $90.00 since new 'wheels are so expensive........ what do you think about chucking the 40 lb'er in the lathe and cutting off 10 lbs? i have a 30 lb Hays, and it appears to me that the 40 is just extra thick toward the friction face side. your thoughts please. thanks rod in AZ

08-11-2012, 06:09 PM	#2
BlueOval Ralph Banned Join Date: Feb 2008 Posts: 852 Likes: 0 Liked 0 Times in 0 Posts	Re: flywheel ? I used to have 40 pounders machined down to about 28 lbs they were cut from starting at about the dia of the crank and maching toward the outside leaving about a 1 1/2 at the od they act like a heaver wheel Hays called the scollped flywheels.

08-11-2012, 06:28 PM	#3
BillK Member Join Date: Nov 2005 Location: Waldorf Md Posts: 230 Likes: 12 Liked 30 Times in 17 Posts	Re: flywheel ? Rod, Just remember that when you do this the SFI certification goes bye bye __________________ Bill Koustenis

08-11-2012, 06:49 PM	#4
BlueOval Ralph Banned Join Date: Feb 2008 Posts: 852 Likes: 0 Liked 0 Times in 0 Posts	Re: flywheel ? Rod you have a private message.

08-11-2012, 07:16 PM	#5
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,790 Likes: 2,882 Liked 5,080 Times in 1,936 Posts	Re: flywheel ? Yep , can be done.. Some on the crank side as mentioned ,and some across the face. It's hard to get a good surface on a lathe though. It'll chatter and vibrate. One problem is it's moving faster when you get towards the outside edge. Finish it up with a flywheel surface grinder. __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

08-12-2012, 12:01 AM	#6
rod Member Join Date: Dec 2009 Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66 Posts: 313 Likes: 0 Liked 20 Times in 15 Posts	Re: flywheel ? thanks for the help. it is hard to do things like this in a small town where nothing like this has been done before. rod in AZ

08-12-2012, 03:01 AM	#7
Run to Rund Senior Member Join Date: Sep 2007 Location: Henderson, NV Posts: 583 Likes: 8 Liked 54 Times in 27 Posts	Re: flywheel ? check ebay. If you will accept off-shore steel (and after all no steel is still made here anyway), you should be able to find a cheap new wheel in the 30 lb. range.