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Is there such a thing as a geardrive

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Old 06-13-2006, 11:31 AM
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Default Is there such a thing as a geardrive

was wondering if there was a geardrive for the timing chain....a timing gearset. i know the old first gen motors had them and i like those better than the chains, becuase you can get the noisy set and it'll have that roots blower sound when you go down the street. also you dont ever have stretched chains anymore but i was wondering if someone made it for the ls1 now
Old 06-13-2006, 12:01 PM
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Yeah, I believe they exist.
But you'll have to do some machining and disable knock sensors.

Pete Jackson BTW
Old 06-13-2006, 12:07 PM
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I know they make them.

Like Predator says you're not supposed to use them on computer controlled cars because the knock sensor goes crazy thinking the motor is constantly detonating. It gives off a certain frequency that the sensors pick up.

I remember reading the notes (warnings) on the Summit/Jegs catalogues when I was shopping for a timing chain on my LT1 car.
Old 06-13-2006, 12:51 PM
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geardrives alter cam harmonics and aren't good for high rpm use.

i'd stick with a chain. i had a noisy pete jackson gear drive, it got annoying real fast.
Old 06-13-2006, 04:27 PM
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damn it! i've always liked the gear drives but never thought about the damn computer!! they're not good for high rpm usage? what happens like it scoots out or somthing?
Old 06-13-2006, 04:43 PM
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Originally Posted by reject
damn it! i've always liked the gear drives but never thought about the damn computer!! they're not good for high rpm usage? what happens like it scoots out or somthing?
No they're great for durability, extreme spring pressure, and high rpm.

But to some the noise gets old (isn't quite like a supercharger), the computer can't take it, on the gen I small blocks it didn't always fit (depending on brand) under the factory type timing cover.
Old 06-13-2006, 05:52 PM
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Originally Posted by FIREHAWK#608
No they're great for durability, extreme spring pressure, and high rpm.

But to some the noise gets old (isn't quite like a supercharger), the computer can't take it, on the gen I small blocks it didn't always fit (depending on brand) under the factory type timing cover.

yeah that's wwhat i was thinking

i wish the computer would be able to take it. i'm used to that sound. nabors down the street all run them and i hear them all the time, i've gotten used to that sound and feels wierd not hearing it evertying when they dont drive. owell really wish the computer would play well but guess not this time. thanks for all of you guys help!!
Old 06-13-2006, 08:53 PM
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Originally Posted by FIREHAWK#608
No they're great for durability, extreme spring pressure, and high rpm.
that's why the disclaimer that came with mine said, "not intended for use above 6,500 rpm"
Old 06-13-2006, 09:03 PM
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Originally Posted by s346k
that's why the disclaimer that came with mine said, "not intended for use above 6,500 rpm"
True, I was thinking "normal" high rpm. Remember that most earlier GM small blocks didn't turn much above 6k unless it was a pretty radical build.

These LSx engines really scream.
Old 06-13-2006, 09:19 PM
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i distinctly remember that because i swapped cams at the time, also. went with a solid lift flat tappet, big duration cam. i remember sitting in the car reading the paperwork as i was breaking in the new cam/lifters @ 2,000 rpm with open headers and coming across that...i was like wtf.

anyhow, i spun a bearing about 2 months later after shifting @ 6,800.

it actually spun the bearing @ 2,500 rpm cruising down the highway...




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