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-   -   Timing gears vs double roller chain timing chain (http://www.hotrodders.com/forum/timing-gears-vs-double-roller-chain-timing-chain-8308.html)

Jag Daddy 05-21-2003 10:18 PM

Timing gears vs double roller chain timing chain
 
I was browing around ebay and notice someone was selling a set of timing gears to replace your timing chain. They stated that they would fit under the stock timing chain cover. My question is would it be worth putting a set of timing gears in my new rebuild project or???

Regards
Mark

DoubleVision 05-21-2003 10:45 PM

I wouldn`t use one, even so they offer dead on the money timing compared to a chain, gears can be noisy, and they can carry harmonics to the valvetrain. and if one of the gears decides it wants to break they`ll jam or cause a lot of carnage. there not really needed on a street machine, I would only run one if I was running in a high dollar serious racing class.

Ed ke6bnl 05-22-2003 03:31 AM

[quote]Originally posted by DoubleVision:
<strong>I wouldn`t use one, even so they offer dead on the money timing compared to a chain, gears can be noisy, and they can carry harmonics to the valvetrain. and if one of the gears decides it wants to break they`ll jam or cause a lot of carnage. there not really needed on a street machine, I would only run one if I was running in a high dollar serious racing class.</strong><hr></blockquote>

I know nothing about them on v8 but my ford straight 6 170 has a gear/gear timing and I believe the v6 84 chevy citation and even my Jeep 4.0 may use one all with better service then any BELT they are no noise types. Not saying you are wrong, these do only use two gears meashed together not an idler typy which may be the problem.

blndweasel 05-22-2003 07:36 AM

I stand by timing gears as a worthwhile investment, just for the peace of mind of never having to worry about timing changes.

For the last three years I've been running a Sig Erson single idler timing gear setup, it's got a one piece billet aluminum housing and it really isn't very noisy. It does have a nice whine to it, reminiscent of a big blower setup, just much more subtle. It has an access cover located directly beneath the water pump, so without completely disassembling your engine, you can open the acces cover and make adjustments to cam timing.

It's not that a timing gear is going to really give you any direct benefits performance wise over a standard double roller, I think it's more about peace of mind, and having people ask me "dang man, what's that sound? What do you have under there?" Which is fun in itself cause you can play with stupid ricers and make up whatever stories you want and they'll never be the wiser.

Jag Daddy 05-22-2003 10:10 AM

blndweasel:
How much of that gets into the interior? I kinda like the whine myself, I think it be a kick to see this old Jag sound like its super charged. The setup I was looking at had a double idler setup. I'll see if i can grab a photo and post it.

Regards
Mark :)

johnsongrass1 05-22-2003 01:47 PM

Even HIGH dollar engines don't use em most of the time. Jesel belt drives the way to go. and NO annoying racket.

Bartman39 05-22-2003 04:49 PM

I agree with (johnsongrass1) on the Jesel belt drives as the best... After all thats what prostock uses...? Quiet is good for more than one reason... It allows you to hear other problems if they develope and if you have that whine going on then it finds it way everywhere so you cant pinpoint anything else that is making noise... Sure its kinda cool but a good true roller timing chain Vs. a gear drive for the street and most strip apps is cheaper and yes if the gear drive breaks then you gotts lots of scrap metal... ;) BTW the timing accuracy of the trueroller Vs. gear drive is so little in difference the extra $$$ and headache from the whine does not make it worth the hassle...

horvath 05-22-2003 04:56 PM

I've got a gear drive in my truck and I want to swap it out ... they tell me it's a real quiet gear drive, but I like to isten to my engine when I drive and that whinning just drives me nuts!

Alan Horvath
<a href="http://AlanHorvath.com/54chevy/" target="_blank">54 Chevy Pickup</a>

Jag Daddy 05-22-2003 09:42 PM

Jesel's are WAY outa my price range. The reason I was cosidering timing gears is they are very adjustable for timing. How bad is the whine anyway? Couldn't be any worst than my wife asking me to not work on the car today could it?????

Regards
Mark

showtime 05-22-2003 11:16 PM

Hey blndweasel. I have the same Erson Gear Drive in my motor. Has Erson been making those gear drive the same way for a while?? I am building another motor and ordered another Erson Gear Drive with gear built into billet cover. I am hoping it will have the same great sound....?? Thanks......

Dave

horvath 05-23-2003 10:57 AM

Some guys LOVE the whine! Some don't. I definitely don't. It's not so loud ... but it makes itself very obvious -- to me, it's like a wife that nags. Instead of hearing my engine-sound, I hear the whine.

Thanks for the info on the Jesel - I want to put a GOOD performance timing chain in place of my gear drive. How much does the Jesel go for? Anyone want to buy my gear drive?

Alan Horvath
<a href="http://AlanHorvath.com/54chevy/" target="_blank">54 Chevy Pickup</a>

Jag Daddy 05-24-2003 10:09 PM

So what causes them to whine? is it the idler gear or? Also is this a job that the engine need to be out of the car, or the whole front end torn down?

Regards
Mark

horvath 05-24-2003 10:22 PM

What makes them whine is the gears themselves. Instead of a timing chain going around 2 gears, you have 2 MORE gears doing what the chain does ... so now you have 4 gears, no chain, and all them teeth - hard metal against metal. No play.

The Jesel isn't a timing chain, but a belt - looks nice, but $800 chases me away.

Alan Horvath
<a href="http://AlanHorvath.com/54chevy/" target="_blank">54 Chevy Pickup</a>


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