double roller timing chain vs. gear drive?

[howardr8952]

which is better in a 408?what actually does the gears do over a chain?any input is helpful thanks.

[Rodeheaver's]

I would not use a gear drive because of the harmonik vibrations they make, you cant hear them or feel them but they reak havok on other parts... i would stick with the good ol double roller..

[howardr8952]

thanks tim

[CobraII]

I think gear drives claim that they're more accurate, since chains may stretch some over their lives. I don't know about Ford engines, but I know certain year sbc's required machining for the gear drives to sit right against the face of the block.

Just my 2 cents... but always degree your cam when installing a new chain, to make sure everything is right. I put a new chain on the 455 Olds I was building this spring, thought I put it on straight up, reusing the same cam, thought I didn't need to degree it. I hung all 8 exhaust valves open, nicked the tops of the pistons, got crap down in the rod bearings. $600 lesson.

[Chance Sumney]

Hey im putting a 408 together right now and i put a double roller in mine.

[howardr8952]

thanks guys good info coming from you guys.didn't really make up my mind yet though

[wick]

If your looking for something really accurate, go with the Jesel belt drive.

[SK@StreetLethal]

Buy a good double roller chain with a thrust bearing set up and call it a day. I do not like gear drives because of all the vibrations they induce into the valvetrain.