Gear Drive vs Dual Timing chains - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-12-2011, 06:54 PM
Registered User
 
Join Date: Feb 2011
Location: Milwaukee, WI
Posts: 54
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Gear Drive vs Dual Timing chains

What are your opinions about both? I'm hearing mixed about both!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-12-2011, 07:06 PM
bigdog7373's Avatar
Of course it's fast
 
Last photo:
Join Date: May 2010
Location: florida
Posts: 2,673
Wiki Edits: 0

Thanks: 13
Thanked 49 Times in 49 Posts
Double roller is quieter and gives more power but doesnt last as long and stretches over time. Gear drive has a cool sound but you'll lose a tiny bit of power, more durable, doesnt alter timing like chain stretch.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-12-2011, 08:22 PM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,051
Wiki Edits: 0

Thanks: 1
Thanked 21 Times in 18 Posts
I used both Double Roller and Gear drive. The first 10-15years I was using double roller. The next 30 years I used gear drive and still using gear drive on my 406sbc. What bigdog 7373 is right. They sound great to me and I rarely adjust the timing.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-13-2011, 06:07 AM
BOBCRMAN@aol.com's Avatar
Member
 
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 8,088
Wiki Edits: 0

Thanks: 24
Thanked 258 Times in 242 Posts
As i've said before. A gear drive is the worst thing you can do to a Chevrolet engine.

Gear drives transfer any crank harmonics to the valve train.

If you had ever seen the effects gear drives have on valve train parts in a running engine. You would never use another...
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-13-2011, 08:29 PM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,051
Wiki Edits: 0

Thanks: 1
Thanked 21 Times in 18 Posts
I found nothing worn just by using gear drive. I do not believe it at all. After using it for around 25 years. I was well known when going to criuse night for years in my 69 Chevelle. They heard me coming before they saw me.

Last edited by lg1969; 02-13-2011 at 08:41 PM.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-14-2011, 02:09 AM
bentwings's Avatar
bentwings
 
Last photo:
Join Date: May 2002
Location: St.Paul, Minn
Age: 72
Posts: 1,794
Wiki Edits: 0

Thanks: 0
Thanked 16 Times in 15 Posts
I just put 12,000 miles on my hotrod last year and 1500 the year before. Not only do I have a gear drive but I use only a crank hub instead of a balancer for the blower belt and accessory drive. Add to this aluminum roller rocker arms and ball ended heat treated push rods with guide plates. It goes without saying I use a flat tappet hyd cam with performance lifters too. I forgot, I also use a high vol high pressure oil pump. All "wrong".

I adjusted the valve train at the beginning of the year and that was it. After I finalized the timing I never adjusted it again either. I checked it regularly however.

My Cummins diesel has a massive gear train for the cam and injector pump as well as other drives. I've got 250k on that motor and never have adjusted the valves. Checked but didn't need adjusting.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-14-2011, 06:35 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Be aware there are different types/styles of "gear drives". Some use a floating idler, some have pinned idlers on either side, some require the block to be machined to fit in some cases. Most fit under a stock size timing cover, but check all this beforehand, should you decide to use one.

But, IMO there's nothing to be gained by using a gear drive. In my experience, a good true roller timing set will last 50K miles-plus in your average street performance engine.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-14-2011, 05:58 PM
Blazin72's Avatar
You got a leaky spark tube...
 
Last wiki edit: Rearend removal
Last journal entry: General Lee
Last photo:
Join Date: Jul 2005
Location: Union, WA
Age: 32
Posts: 2,868
Wiki Edits: 19

Thanks: 0
Thanked 2 Times in 2 Posts
You're gonna find people on both sides of the gear drive argument. I personally can't stand the sound of a gear drive. I performed a cam swap on a 350 of mine and decided to put in a gear drive just for the heck of it. As soon as i started the engine up for break in I couldn't stand the noise. I had the truck for three years after that and even though I never pulled it back out I couldn't stand the thing.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-14-2011, 11:41 PM
bentwings's Avatar
bentwings
 
Last photo:
Join Date: May 2002
Location: St.Paul, Minn
Age: 72
Posts: 1,794
Wiki Edits: 0

Thanks: 0
Thanked 16 Times in 15 Posts
I gotta admidt that the sound of the gear drive on the unblown motor was not like the sound of the blower at all. And I agree that it got old after a while. The blower now seems to cancel it and is much less grating. It actually is nice purr as you go down the road.

If the gears were helical and set up so the thrust was toward the block, you would have an ideal situation. Cam walk on roller cam would go way and you would have a quiet and bullet proof system.

The single gear systems like a Milodon are much quieter.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 02-15-2011, 12:29 AM
Blazin72's Avatar
You got a leaky spark tube...
 
Last wiki edit: Rearend removal
Last journal entry: General Lee
Last photo:
Join Date: Jul 2005
Location: Union, WA
Age: 32
Posts: 2,868
Wiki Edits: 19

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by bentwings
I gotta admidt that the sound of the gear drive on the unblown motor was not like the sound of the blower at all.
Can't argue with that one bit. A blower making boost at 5000+ rpm sounds pretty darn good and nothing like a gear drive.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 02-15-2011, 03:23 AM
bentwings's Avatar
bentwings
 
Last photo:
Join Date: May 2002
Location: St.Paul, Minn
Age: 72
Posts: 1,794
Wiki Edits: 0

Thanks: 0
Thanked 16 Times in 15 Posts
The 8mm belt has a sound of it's own too compared to the 1/2 in pitch flat timing belt.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 02-15-2011, 11:00 AM
Blazin72's Avatar
You got a leaky spark tube...
 
Last wiki edit: Rearend removal
Last journal entry: General Lee
Last photo:
Join Date: Jul 2005
Location: Union, WA
Age: 32
Posts: 2,868
Wiki Edits: 19

Thanks: 0
Thanked 2 Times in 2 Posts
Never heard that. The only thing I can reference for sound is the gear whine from the little 142 I had. It was definitely different than a gear drive and it sounded great at high RPM.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 02-15-2011, 01:31 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 8,952
Wiki Edits: 0

Thanks: 20
Thanked 376 Times in 345 Posts
You won't find anyone serious about racing (Hobby or Professional) using a floating idler gear drive, like the Pete Jackson.

If they are using a gear drive it is a single fixed idler type.

Most use a good chain set-up or step up to a Belt drive.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 02-15-2011, 01:46 PM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,051
Wiki Edits: 0

Thanks: 1
Thanked 21 Times in 18 Posts
http://www.hotrodders.com/gallery/sh...cat/500/page/3

Had it more then 20 years
BTW: This one is from Edlebrock
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 02-15-2011, 06:19 PM
Von MoPar's Avatar
Registered User
 
Last photo:
Join Date: Feb 2007
Location: AUSTRALIA
Posts: 29
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
B&M gear drive

installed a B&M gear drive on a SBC 1986 ish, it's very noisy as the idler is mounted to the aluminum timing cover.........

oh-well some people like it others don't
Reply With Quote Quick reply to this message

Recent Hotrodding Basics posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
noisey timing gear drive needs grinding crankshaft3rd Engine 3 01-21-2011 08:19 AM
gear drive timing set sexypizzaman Engine 4 10-18-2009 09:21 PM
timing chains, gear drives, and covers 95dime Engine 9 04-22-2009 01:03 PM
Gear-Drive Timing Set vs. Chain-Drive Timing Set nightrain_rod Engine 8 12-25-2003 03:36 PM
Swapping Gear Drive Out for Timing Chain or Belt Drive - Need Suggestions horvath Engine 4 05-24-2003 08:47 PM


All times are GMT -6. The time now is 06:41 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.