The Ford Barn

deuce lover · 11-24-2022, 04:23 AM

A friend here wants to replace his fiber timing gear with an aluminum one.Is there a difference with the 59A to the 8BA? Here is a pic of a set for sale here although there is no reference number.He doesn't want to replace the crank gear.

Mart · 11-24-2022, 04:28 AM

Yes.
The teeth are cut on the opposite helix. 59A pushes the cam towards the block. 8BA pushes the cam forwards towards the timing cover.
For what it is worth French motors use aluminium gears cut the same way as 59A.
As far as I can tell, those gears in the picture are cut like 59A. (Don't take my word on it though).
Mart.

deuce lover · 11-24-2022, 05:36 AM

Thanks much Mart ! This happens to be a 59A ,USA engine that I was asking about.

Kurt in NJ · 11-24-2022, 08:09 AM

fiber gears wear the crankshaft gear different than the aluminum gear, a new aluminum gear may not be happy with a used crankshaft gear that ran with a fiber gear

deuce lover · 11-24-2022, 03:02 PM

I will mention that to him. The fiber gear in place appears new,so he says.Here is a pic of his timing gear setup

petehoovie · 11-24-2022, 03:10 PM

Sponsored Links (Register now to hide all advertisements)

Won't these straight cut aluminum gears 'whine'?

tubman · 11-24-2022, 03:30 PM

I've had 'em on 3 engines and never heard a "whine". As a matter of fact, I don't remember any different sounds at all. Maybe it's the Fenton's and steel packs.

deuce lover · 11-25-2022, 01:29 AM

Any hearing loss enter into this ?

V8COOPMAN · 11-25-2022, 03:13 AM

Quote:

Originally Posted by petehoovie

Won't these straight cut aluminum gears 'whine'?

Anyone caring to look closely will see that these are NOT "straight-cut" gears. The helix angle is most definitely visible, especially when looking at the right side of the cam gear.

Coop

Mart · 11-25-2022, 04:21 AM

I have a theory that the aluminium gears bed into the crank gear. The French motor in my truck whined. I realised I had switched the cam gears. I fitted the gear that was originally paired with the crank and it quietened down.

deuce lover · 11-25-2022, 04:37 AM

Not a French motor .My friend will change out using the matched set.He was surprised to find the fiber gear when he pulled the cover off.He is learning about flathead Ford V8's.He found that new set advertised on the equivalent of Craigslist here in France for $25.Looks like what H&H sells in their catalog.

JM 35 Sedan · 11-25-2022, 08:41 PM

Some of the new fiber gears available today (probably coming from offshore souurces) are nowhere near the quality of the original fiber gear used by Ford. I had one fail, somewhere between 1000 to 2000 miles on a rebuilt '35 221ci, 21 stud engine. I replaced that with an aluminum gear that now has over 35k miles on it. I wouldn't consider use anything other than aluminum timing gears now. Luckily, I was able to stock up on enough of these aluminum gears to rebuild as many 21 stud engines that I will ever need.

Kube · 11-26-2022, 08:52 AM

Quote:

Originally Posted by JM 35 Sedan

Some of the new fiber gears available today (probably coming from offshore souurces) are nowhere near the quality of the original fiber gear used by Ford. I had one fail, somewhere between 1000 to 2000 miles on a rebuilt '35 221ci, 21 stud engine. I replaced that with an aluminum gear that now has over 35k miles on it. I wouldn't consider use anything other than aluminum timing gears now. Luckily, I was able to stock up on enough of these aluminum gears to rebuild as many 21 stud engines that I will ever need.

John, so glad you added your experience here. I too had a "new" fiber gear fail after less than 500 miles and toasted the fresh engine.
My advice to anyone thinking of using a fiber gear? Locate a NOS or NORS gear and stay far away from the new parts.

11-24-2022, 04:28 AM	#2
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,755	Re: Fiber timing gear Yes. The teeth are cut on the opposite helix. 59A pushes the cam towards the block. 8BA pushes the cam forwards towards the timing cover. For what it is worth French motors use aluminium gears cut the same way as 59A. As far as I can tell, those gears in the picture are cut like 59A. (Don't take my word on it though). Mart.

11-24-2022, 05:36 AM	#3
deuce lover Senior Member Join Date: May 2010 Location: Southern France Posts: 5,307	Re: Fiber timing gear Thanks much Mart ! This happens to be a 59A ,USA engine that I was asking about.

11-24-2022, 08:09 AM	#4
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: Fiber timing gear fiber gears wear the crankshaft gear different than the aluminum gear, a new aluminum gear may not be happy with a used crankshaft gear that ran with a fiber gear

11-24-2022, 03:10 PM	#6
petehoovie Senior Member Join Date: May 2015 Posts: 8,150	Re: Fiber timing gear Sponsored Links (Register now to hide all advertisements) Won't these straight cut aluminum gears 'whine'? __________________ The only thing nice about being imperfect is the joy it brings to others.... *"Silver rings, your butt! Them's washers!"* "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 Last edited by petehoovie; 11-24-2022 at 09:21 PM.

11-24-2022, 03:30 PM	#7
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,319	Re: Fiber timing gear I've had 'em on 3 engines and never heard a "whine". As a matter of fact, I don't remember any different sounds at all. Maybe it's the Fenton's and steel packs.

11-25-2022, 01:29 AM	#8
deuce lover Senior Member Join Date: May 2010 Location: Southern France Posts: 5,307	Re: Fiber timing gear Any hearing loss enter into this ?

11-25-2022, 04:21 AM	#10
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,755	Re: Fiber timing gear I have a theory that the aluminium gears bed into the crank gear. The French motor in my truck whined. I realised I had switched the cam gears. I fitted the gear that was originally paired with the crank and it quietened down.

11-25-2022, 04:37 AM	#11
deuce lover Senior Member Join Date: May 2010 Location: Southern France Posts: 5,307	Re: Fiber timing gear Not a French motor .My friend will change out using the matched set.He was surprised to find the fiber gear when he pulled the cover off.He is learning about flathead Ford V8's.He found that new set advertised on the equivalent of Craigslist here in France for $25.Looks like what H&H sells in their catalog.

11-25-2022, 08:41 PM	#12
JM 35 Sedan Senior Member Join Date: May 2010 Location: Near Rising Sun, Maryland Posts: 10,858	Re: Fiber timing gear Some of the new fiber gears available today (probably coming from offshore souurces) are nowhere near the quality of the original fiber gear used by Ford. I had one fail, somewhere between 1000 to 2000 miles on a rebuilt '35 221ci, 21 stud engine. I replaced that with an aluminum gear that now has over 35k miles on it. I wouldn't consider use anything other than aluminum timing gears now. Luckily, I was able to stock up on enough of these aluminum gears to rebuild as many 21 stud engines that I will ever need. __________________ *John* *"Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts". Albert Einstein* Last edited by JM 35 Sedan; 11-25-2022 at 09:16 PM.