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  Gear drives VS. Timing Chains

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Author Topic:   Gear drives VS. Timing Chains
70SportsRoof
Gearhead

Posts: 351
From: Scottsdale, AZ, In the hot hot Valley of the Sun
Registered: Dec 2001

posted 02-08-2002 07:49 PM     Click Here to See the Profile for 70SportsRoof   Click Here to Email 70SportsRoof     Edit/Delete Message   Reply w/Quote
What are the pros and cons of using gear drives vs using timing chains, besides the price difference. I'm getting ready to build up a '68 J-code 302 for my '46 Ford truck and was wondering what would be a better choice for this engine.

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1970 Deluxe SportsRoof, (2)46 Ford trucks, 47 Ford truck, 57 Ford Fairlane 500 4dr, '72 Olds Vista cruiser, '88 Bronco II...you can never have too many cars

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AKBOSSMAN
Gearhead

Posts: 2766
From: WASILLA , AK USA M&M #743 MCA #40857
Registered: Oct 2000

posted 02-08-2002 09:18 PM     Click Here to See the Profile for AKBOSSMAN   Click Here to Email AKBOSSMAN     Edit/Delete Message   Reply w/Quote
for the street they get be be too noisy and the one i heard is loud.

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WAYNE CURTIS

70 GRABBER GREEN BOSS 302

01 Sangria Red Focus ZX3
03 Boss 302 (5.0) (waiting on order form)
92 SHELBY 4X4 (K-9 IDITAROD LEAD DOG)
My old '71Torino GT
"If your under control then your not going fast enough" Parnelli Jones

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steve'66
Gearhead

Posts: 4307
From: Sonoma,CA,USA
Registered: Mar 2000

posted 02-08-2002 09:21 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Gear drives sound like you're out of power steering fluid. Cool at first, but you'll be changing it out for a chain drive w/i a month.

The best is a belt drive.

SteveW

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SundanceKid
Gearhead

Posts: 732
From: UT
Registered: Feb 2001

posted 02-08-2002 09:35 PM     Click Here to See the Profile for SundanceKid   Click Here to Email SundanceKid     Edit/Delete Message   Reply w/Quote
What about a single idler gear drive? I've never heard one before?

You'll get better timing acuracy with the gears, they are harsher on the valvetrain and they do sound aweful. Belt drives transmit less harmonics but are spendy.

I "think" the best would be a dual gear setup with a reverse rotation cam....I don't even think they make them for SBF's though?

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70SportsRoof
Gearhead

Posts: 351
From: Scottsdale, AZ, In the hot hot Valley of the Sun
Registered: Dec 2001

posted 02-09-2002 02:38 PM     Click Here to See the Profile for 70SportsRoof   Click Here to Email 70SportsRoof     Edit/Delete Message   Reply w/Quote
Thanks guys, this was the kind of input I was looking for. I think I'll use the timing chain for the 302.

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1970 Deluxe SportsRoof, (2)46 Ford trucks, 47 Ford truck, 57 Ford Fairlane 500 4dr, '72 Olds Vista cruiser, '88 Bronco II...you can never have too many cars

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