Timing Gears

bentwheel43 · Post by **bentwheel43** » Sat Mar 08, 2008 5:35 pm

I been useing Cat Timing Gears for the last 2 years,last week my teammate broke his gears on a 406sbc and bent all but 2 valves.Last year another racer broke a timing chain and bent some valves.Are the gears prone to breaking or was it just bad luck?My gears is on a 451 mopar.

CNC BLOCKS · Post by **CNC BLOCKS** » Sat Mar 08, 2008 6:01 pm

Any Cat stuff I have seen has not been very good in quality but there cheap and some times you get what you pay for!!!!

Ron C. · Post by **Ron C.** » Sat Mar 08, 2008 8:02 pm

When I ran gear drives back in the 70's and 80's it was always Summers Bros stuff. Never had a problem one.... I don't know who would make a good one today (?)

Blessings.........Ron.

travlinman572 · Post by **travlinman572** » Sat Mar 08, 2008 10:27 pm

Four of us run the Milidon. pain in the assets to set up, but has worked fine. A few of the blower cars use them too.

bentwheel43 · Post by **bentwheel43** » Sat Mar 08, 2008 11:40 pm

travlinman572 wrote:Four of us run the Milidon. pain in the assets to set up, but has worked fine. A few of the blower cars use them too.

Well,we run alot of rould with the car,many passes,its a dead-on car.When I took the motor down the gears looks brand new,but I don't want to blow the motor.The 406sbc had a Milidon,put a 630 roller and made 3 passes, it broke all the teeth off the cam gear and broke the crank gear in 3 pieces,all of the pieces were fount.I just put roller cam in mine,that gear sure did hold timing good.If someone know about problems with then maybe I can find out before I FIND OUT!!

travlinman572 · Post by **travlinman572** » Sun Mar 09, 2008 12:41 am

You got my attention. 1 guy broke 2 timing chains and we all went follow the leader, I dont know, but so far, so good. Maybe some one will come on here and bust my bubble.

Racerrick · Post by **Racerrick** » Sun Mar 09, 2008 12:43 am

Something else is going on to break all the teeth off a Milodon drive. I suspect valve float or valve to piston interference or something got between the gear teeth.
I will not install gear drives like the the pete jackson etc in any engine
regardless of what the customer wants. Imho unless your driving a dry sump pump off the cover I fail to see any reason to run a gear drive. Use a jesel belt drive or cloyes billet. Cam drives are not a place to try and save money.

Don Terrill’s Speed-Talk

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