timing belt gear - The 1947 - Present Chevrolet & GMC Truck Message Board Network

9CHEVY4 · 12-12-2003, 02:44 AM

ok here it is i'm asking this question for my brother.

he wants to replace the timing belt with timing gear (gear drive)
is this what is it?
is that possible?

Rooster's 67 · 12-12-2003, 03:28 AM

yes,,,, if it the right one for the application,,,,,the one pictured is also a noisy drive.....you will get a whine, sounds kinda like a blower

9CHEVY4 · 12-12-2003, 03:40 AM

how can u tell if it's set on noisy or quiet.

thanks i did a little research on
gears
any website where i can find them

SEVEND2 · 12-12-2003, 05:27 AM

On my 350 in my 72
Pete jackson Noisey Gear drive

Longhorn Man · 12-12-2003, 05:35 AM

What does your brother drive? I don't think they make many (if any) gear drives to replace belts.

9CHEVY4 · 12-12-2003, 04:44 PM

let me know if u have any info on this.
he wants to buy one but i'm not sure where to find it,

so u get the gears and still keep the timing belt?

he's got a 72 big block it's in the shop for a new paint

1969 C-10 small block

jorgensensc · 12-12-2003, 04:49 PM

My buddy had the Not Noisy version of those gear drives and they were still noisy!! He said if he had it to do over he would just get a GOOD set of double rollers. Just an opinion though!!!

Longhorn Man · 12-12-2003, 05:24 PM

OK, you're replacing a timing chain, not belt.
I guess that is my fault, when some one says belt, I picture a front wheel drive sh!t box or whatever. (Like the tiiming belt I just did last night on the wife's Contour)
The timing gears are nice and acurate, but even the quiet ones make a bunch of noise. The noise seems 'cool' at first, but if it is a daily driver, they well become very irritating in a short time.
A quality double roller will stay tight for a good 50,000, and remain serviciable for another 30,000-40,000. So in reality, the durability or extended life is not much of a selling point.
Onless it is a race only, or more time on the strip than on the street, then the only main reason to do this is for the noise.

SEVEND2 · 12-12-2003, 06:49 PM

you dump the belt/chain and install gear drive, you can get it through Summitracing. If you call them they are very knowledgeable on it

Baradium · 12-12-2003, 11:56 PM

I don't understand why they can't make them quiet.

My scout has factory timing gears and you can't hear them...

-Ryan

Longhorn Man · 12-13-2003, 01:58 AM

Every Pontic 2.5 (151 ci Iron duke) has timing gears, as do many inlines has gears, and they are dead quiet too.

Baradium · 12-13-2003, 02:04 AM

I think that the reason might be the engine design.

the engines originally designed for gears probobly all have counter rotating cam and crank shaft. This allows the gears to directly intermesh instead of having to have an intermediate gear (or gears as is the case in the pictures) which maybe leads to the gear noise). The cut of the gear also affects the noise. Straight cut gears are noisier but stronger than the heli cut gears (IIRC on the second name), which are quieter.

Sound plausible?

slam33 · 12-13-2003, 12:14 PM

most of the time those gears were also plastic. the only ones I ever found to be somewhat quiet were the Crowers that come with there own cover but do you want to spend $350.

12-12-2003, 02:44 AM	#1
9CHEVY4 Registered User Join Date: Nov 2003 Location: so cal Posts: 56	timing belt gear ok here it is i'm asking this question for my brother. he wants to replace the timing belt with timing gear (gear drive) is this what is it? is that possible?

12-12-2003, 03:28 AM	#2
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	yes,,,, if it the right one for the application,,,,,the one pictured is also a noisy drive.....you will get a whine, sounds kinda like a blower __________________ The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

12-12-2003, 05:27 AM	#4
SEVEND2 Registered User Join Date: Aug 2001 Location: Menifee, Calif, USA Posts: 2,145	On my 350 in my 72 Pete jackson Noisey Gear drive __________________ With a 1972 Chevy Custom-10 Long bed w/350cid th350, (under-construction). Progress on truck so far (follow link): http://67-72chevytrucks.com/vboard/s...ad.php?t=51051 and stage 2 http://67-72chevytrucks.com/vboard/s...ad.php?t=58132 ~ "Why couldn't you have just put the bunny back in the box?" ~ Last edited by SEVEND2; 10-05-2007 at 04:54 AM.

12-12-2003, 04:44 PM	#6
9CHEVY4 Registered User Join Date: Nov 2003 Location: so cal Posts: 56	let me know if u have any info on this. he wants to buy one but i'm not sure where to find it, so u get the gears and still keep the timing belt? he's got a 72 big block it's in the shop for a new paint 1969 C-10 small block Last edited by 9CHEVY4; 12-12-2003 at 04:46 PM.

12-12-2003, 04:49 PM	#7
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	My buddy had the Not Noisy version of those gear drives and they were still noisy!! He said if he had it to do over he would just get a GOOD set of double rollers. Just an opinion though!!! __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

12-12-2003, 03:40 AM	#3
9CHEVY4 Registered User Join Date: Nov 2003 Location: so cal Posts: 56	how can u tell if it's set on noisy or quiet. thanks i did a little research on gears any website where i can find them

12-12-2003, 05:35 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	What does your brother drive? I don't think they make many (if any) gear drives to replace belts.

12-12-2003, 05:24 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	OK, you're replacing a timing chain, not belt. I guess that is my fault, when some one says belt, I picture a front wheel drive sh!t box or whatever. (Like the tiiming belt I just did last night on the wife's Contour) The timing gears are nice and acurate, but even the quiet ones make a bunch of noise. The noise seems 'cool' at first, but if it is a daily driver, they well become very irritating in a short time. A quality double roller will stay tight for a good 50,000, and remain serviciable for another 30,000-40,000. So in reality, the durability or extended life is not much of a selling point. Onless it is a race only, or more time on the strip than on the street, then the only main reason to do this is for the noise.

12-12-2003, 06:49 PM	#9
SEVEND2 Registered User Join Date: Aug 2001 Location: Menifee, Calif, USA Posts: 2,145	you dump the belt/chain and install gear drive, you can get it through Summitracing. If you call them they are very knowledgeable on it __________________ With a 1972 Chevy Custom-10 Long bed w/350cid th350, (under-construction). Progress on truck so far (follow link): http://67-72chevytrucks.com/vboard/s...ad.php?t=51051 and stage 2 http://67-72chevytrucks.com/vboard/s...ad.php?t=58132 ~ "Why couldn't you have just put the bunny back in the box?" ~

12-12-2003, 11:56 PM	#10
Baradium Binder Rep Join Date: Jan 2001 Location: Salcha, AK Posts: 1,506	I don't understand why they can't make them quiet. My scout has factory timing gears and you can't hear them... -Ryan

12-13-2003, 01:58 AM	#11
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Every Pontic 2.5 (151 ci Iron duke) has timing gears, as do many inlines has gears, and they are dead quiet too.

12-13-2003, 02:04 AM	#12
Baradium Binder Rep Join Date: Jan 2001 Location: Salcha, AK Posts: 1,506	I think that the reason might be the engine design. the engines originally designed for gears probobly all have counter rotating cam and crank shaft. This allows the gears to directly intermesh instead of having to have an intermediate gear (or gears as is the case in the pictures) which maybe leads to the gear noise). The cut of the gear also affects the noise. Straight cut gears are noisier but stronger than the heli cut gears (IIRC on the second name), which are quieter. Sound plausible?

12-13-2003, 12:14 PM	#13
slam33 Registered User Join Date: Aug 2001 Location: Long Beach, Ca Posts: 1,432	most of the time those gears were also plastic. the only ones I ever found to be somewhat quiet were the Crowers that come with there own cover but do you want to spend $350. __________________ 71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html " TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410 </A>

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