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Old 03-19-2005, 21:08   #1 (permalink)
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Gear Drive - Diecrest (686)

Does anyone know of a brand of gear drives "Diecrest" ?
Are they any good ?
Any other comments ?

thanks
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Old 03-19-2005, 23:57   #2 (permalink)
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Re: Gear Drive - Diecrest (686)

Most people won't run them in anything but a stock engine as the gears wear quickly. They'll wear even faster if you run heavier valve springs than stock.
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Old 03-20-2005, 00:32   #3 (permalink)
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Re: Gear Drive - Diecrest (686)

Even sounds like a dodgy brand
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Old 03-20-2005, 02:07   #4 (permalink)
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Re: Gear Drive - Diecrest (686)

Had mine in my 2v for about 4 years and guess what ? I had no drama with them.
Then I built a 4V motor and just didn't use them. No real reason not to use them other than the new motor SOUNDED tough enough without the gear drive.

480 hp will do that for you though!
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Old 03-20-2005, 03:28   #5 (permalink)
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Re: Gear Drive - Diecrest (686)

Got abit more info on Diecrest.... Melbourne based company from what I can see !! Has anyone delt with these guys ???

Diecrest Engineering
* Gear Drives * Electric Water Pump Drive
* Gilmer Belt Drives * GM Blower parts
* Fuel Injection Pump & Pulley Drives
* 9" Diff Hardware
* Oil Pump and Distributor Gears
* Gear Reduction Starters
* Full Disc Brake Kits
Bagshaw Street, Harcourt VIC 3453
Ph : 5474 2321 Fax : 03 5474 2536
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Old 03-21-2005, 03:06   #6 (permalink)
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Re: Gear Drive - Diecrest (686)

I pulled my JP Performance gear drive out last year.

It was in the engine for 2 years. The faces on the gears were cactus. Lost of pitting......and where were those little bits of metal floating in my engine?

Yes they minimise cam timing changes due no chain stretch, but that's it IMO.

From a gear drive lover, I much prefer the silence of a double row timing chain. I hear prolonged use (vibration/noise/harmonics) can also transfer to bearings etc and potentially increase wear?? (Don't quote me). Nothing better than a good Rollmaster.
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Old 03-25-2005, 02:02   #7 (permalink)
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Re: Gear Drive - Diecrest (686)

Does Diecrest make Crow's Gear drives ???
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Old 03-26-2005, 03:17   #8 (permalink)
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Re: Gear Drive - Diecrest (686)

i will never use jp gear drives again from the wear and the warranty troubles ive gone through with them
diecrest - i will try on the recomendations from my engine machinist
i think i agree with trublu that gear drives advantages dont always outway the disadvantages of harmonics etc
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