The Ford Barn

Kevin in NZ · 08-08-2015, 12:23 AM

I believe there is a modification to drill holes in the gear to reduce noise. Can any body help me with the details on what to do. I was told the article was in a Secrets of Speed magazine.

hardtimes · 08-08-2015, 01:25 AM

Quote:

Originally Posted by Kevin in NZ

I believe there is a modification to drill holes in the gear to reduce noise. Can any body help me with the details on what to do.

Hey Kevin,
What noise

Seriously ! I run aluminum time gear against steel crank gear for years , and never any noise to speak of. I also have bronze /steel crank gear in another engine. Are you speaking of noise ...first hand, from using metal gears or are you speaking of noisy fiber gear ? I've used fiber timing gears and never have heard any noise to be concerned of ?

BTW..if you have not run 'alloy' gears, but are going on the , IMO, old wives tale that they will be very noisy...well.

Mike V. Florida · 08-08-2015, 01:31 AM

Don't remember ever reading about drilling holes in the timing gear for any reason here on fordbarn or elsewhere. I'm interested is hearing about this as one would think if there were noise it would be from the teeth.

Synchro909 · 08-08-2015, 01:39 AM

I too have never heard a peep from metal timing gears.

katy · 08-08-2015, 10:22 AM

Never heard of drilling holes for a noise problem, but there is a modification to drill holes to change the valve timing.

JohnLaVoy · 08-08-2015, 10:38 AM

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I have never heard of this modification. I have bronze gears in four engines and have driven many long distance trips and never experienced a noise problem.

V4F · 08-08-2015, 11:54 AM

I run one , the only noise is on start up until it gets warm & closes up the clearances ....

Pete · 08-08-2015, 02:15 PM

I have drilled the gears in a couple of race engines but those were straight cut gears and expected to be a bit noisy.
They were drilled to reduce inertial forces though, NOT for noise reduction.
I got the idea from a Ducati motorcycle grand prix engine I worked on once. All of the gears in the engine, primary and all transmission , were extensively drilled.
Since at that time they had won several world grand prix championships, I figured it must help.

Kahuna · 08-08-2015, 02:39 PM

Pete
When I was a kid (about 15) I had and worked on nothing but Model A's & B's. Some older guy told me about drilling the gear teeth when I used an aluminum cam gear. I think he was like 18 or 19. A really old guy.
I didn't do it. Besides, the engine exhaust made plenty of noise

Pete · 08-08-2015, 02:50 PM

Quote:

Originally Posted by Kahuna

Pete
When I was a kid (about 15) I had and worked on nothing but Model A's & B's. Some older guy told me about drilling the gear teeth when I used an aluminum cam gear. I think he was like 18 or 19. A really old guy.
I didn't do it. Besides, the engine exhaust made plenty of noise

You do NOT drill the teeth.
The holes go in the web.

31 Vicky · 08-09-2015, 12:20 AM

The article l believe was to drill holes for lubrication, allow oil coming over the dam to better lubricate the gear contact points.

A's Always
Dave

just plain bill · 08-09-2015, 11:29 AM

Holes were drilled at the center of the timing gear between teeth through to just under the lip on an angle to the rear so that oil would carried to the teeth of the gear. The holes were drilled at 3 equal locations and were small .060 or something like that because some thought they needed more lubrication between gears.

08-08-2015, 12:23 AM	#1
Kevin in NZ Junior Member Join Date: Nov 2011 Location: Christchurch New Zealand Posts: 9	Alloy timing gear I believe there is a modification to drill holes in the gear to reduce noise. Can any body help me with the details on what to do. I was told the article was in a Secrets of Speed magazine. Last edited by Kevin in NZ; 08-08-2015 at 01:52 AM. Reason: additional info

08-08-2015, 01:31 AM	#3
Mike V. Florida Senior Member Join Date: May 2010 Location: South Florida Posts: 14,054	Re: Alloy timing gear Don't remember ever reading about drilling holes in the timing gear for any reason here on fordbarn or elsewhere. I'm interested is hearing about this as one would think if there were noise it would be from the teeth. __________________ What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II

08-08-2015, 01:39 AM	#4
Synchro909 Senior Member Join Date: Jun 2014 Location: Melbourne, Australia Posts: 7,561	Re: Alloy timing gear I too have never heard a peep from metal timing gears. __________________ I'm part of the only ever generation with an analogue childhood and a digital adulthood.

08-08-2015, 10:22 AM	#5
katy Senior Member Join Date: Jun 2015 Location: Red Deer, Alberta Posts: 5,079	Re: Alloy timing gear Never heard of drilling holes for a noise problem, but there is a modification to drill holes to change the valve timing. __________________ If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn!

08-08-2015, 10:38 AM	#6
JohnLaVoy Senior Member Join Date: Jun 2014 Location: Rocklin, CA Posts: 779	Re: Alloy timing gear Sponsored Links (Register now to hide all advertisements) I have never heard of this modification. I have bronze gears in four engines and have driven many long distance trips and never experienced a noise problem.

08-08-2015, 11:54 AM	#7
V4F Senior Member Join Date: May 2010 Location: ca. Posts: 2,522	Re: Alloy timing gear I run one , the only noise is on start up until it gets warm & closes up the clearances .... __________________ V4f

08-08-2015, 02:15 PM	#8
Pete BANNED Join Date: May 2010 Location: Wa. Posts: 5,423	Re: Alloy timing gear I have drilled the gears in a couple of race engines but those were straight cut gears and expected to be a bit noisy. They were drilled to reduce inertial forces though, NOT for noise reduction. I got the idea from a Ducati motorcycle grand prix engine I worked on once. All of the gears in the engine, primary and all transmission , were extensively drilled. Since at that time they had won several world grand prix championships, I figured it must help.

08-08-2015, 02:39 PM	#9
Kahuna Senior Member Join Date: May 2010 Location: NorCal Posts: 2,617	Re: Alloy timing gear Pete When I was a kid (about 15) I had and worked on nothing but Model A's & B's. Some older guy told me about drilling the gear teeth when I used an aluminum cam gear. I think he was like 18 or 19. A really old guy. I didn't do it. Besides, the engine exhaust made plenty of noise

08-09-2015, 12:20 AM	#11
31 Vicky Senior Member Join Date: May 2010 Posts: 106	Re: Alloy timing gear The article l believe was to drill holes for lubrication, allow oil coming over the dam to better lubricate the gear contact points. A's Always Dave

08-09-2015, 11:29 AM	#12
just plain bill Senior Member Join Date: May 2010 Posts: 397	Re: Alloy timing gear Holes were drilled at the center of the timing gear between teeth through to just under the lip on an angle to the rear so that oil would carried to the teeth of the gear. The holes were drilled at 3 equal locations and were small .060 or something like that because some thought they needed more lubrication between gears.