C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

timing chain alternative

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Old Sep 15, 2005 | 12:41 AM
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Default timing chain alternative

i have heard you can actually get two little gears to go between the crank and cam gear and it will never get loose or possibly break like a chain. I have also heard these are ungodly loud and whistle like a supercharger. anyone have any experience with this? im curious exactly how loud it is. i personally like the whistle of a supercharger
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Old Sep 15, 2005 | 12:48 AM
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my buddy at work has them on his 327 in his 67 camaro, ummm yeah, they are pretty loud
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Old Sep 15, 2005 | 12:56 AM
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can u hear it only at idle or is it progressively louder with rpms like exhaust? did u like the sound? did it sound like a S/C?
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Old Sep 15, 2005 | 02:03 AM
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Straight cut gears whine like a ****. If you can stand the constant noise.

There is also a dry belt drive system. If your constantly changing cam timing this is a nice mod.

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Old Sep 15, 2005 | 02:25 AM
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You can get a "noisy" gear drive or the quieter version. Wouldn't recommend it with EFI, they tend to trip the knock sensor, retarding your timing. The harmonics aren't exactly friendly to valvesprings, either. JMO

Oh yeah, on a stick car they sound like a siren between shifts
I'm not knockin them, they are good for an all out track car or a Fri night cruise in hero, but I would stay away in general.

Last edited by cv67; Sep 15, 2005 at 11:29 PM.
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Old Sep 15, 2005 | 11:17 PM
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hmmm i havent heard this. does anyone have them on an LT1 or an LT4?? is this the reason it seems no one does?
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Old Sep 16, 2005 | 12:16 AM
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Some people have managed to get gear drives to play nice with knock sensors but they are on the hairy edge. If I had the money to spend on it, I'd get a Jesel belt drive.
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Old Sep 16, 2005 | 12:23 AM
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I can't see you geting anything other then a good old ouble roller in the 96 with the CPS and even that takes some work. While it may be possible with the pre-96 LT1 motors I have yet to see a gear drive on one yet.
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Old Sep 16, 2005 | 02:05 AM
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Originally Posted by Morley
Some people have managed to get gear drives to play nice with knock sensors but they are on the hairy edge. If I had the money to spend on it, I'd get a Jesel belt drive.
Jesel belt drive in LT1 here! Takes some work to get the timing cover/opti to work well.
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Old Sep 17, 2005 | 02:05 AM
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i guess no one here has done them on an LT1 or LT4. I guess i will probably go with a cloyes double roller timing chain
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Old Sep 17, 2005 | 09:01 AM
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Originally Posted by 1996man
i guess no one here has done them on an LT1 or LT4. I guess i will probably go with a cloyes double roller timing chain
Yes, I have never seen gear drives for LTx engines for sale. I'd do what you are going to do now w/ the Cloyes, or GM Performance Parts makes the heavy duty timing chain for LTx engines, too.
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