scott0408

running a 421 sbc after a year of racing doing some work on it & found the dist gear worn not extremly bad but still makes me worry about it any ideas

zipper06

They are usually good for about a yr. The biggest cause for wear is the oil pump, high pressures causes more wear. It's not uncommon. You can usually pick that up with a timing light is will show eratic timing when you check the timing. Hope this helps.

Zip.

itsabird

Yep common thing with brass gear, as zip said about year of hard running you will see ware,

bluedawg357

Any one running the new comp cams composite distributor gear.

coolracing

Im with Zip we always replaced them every year!

oldandtired

I'm running it. The pin hole is only drilled on one side to allow you to finish it with your distributor shaft. Early gears were breaking because of the slight offset in distributor shaft hole.
I ran bronze gears and changed them at 80-90 runs. Bronze shavings in the oil filter. (See Zips comment above)

cncmotorsports

We have been using them for 2 years, They work great with every camshaft.

Eliminates the need to replace brass gears every year.

zipper06

I don't know if all the cam companies are useing them but i've got a Bullit 4/7 swap (big bump) sm/blk cam that has a cast iron distributor gear and rear bearing pinned and bolted to the billet roller. i was told i coud use a steel gear or a Bronze distributor gear on it. I'm asumming they are doing this to save the cam in case someone doesn't use Bronze gear on their race engine.

Zip.

HiredGun7

I cut an oil feed slot in base of distributor body right above and before where the gears mesh. Bronze gears now last the life of the engine with almost zero wear. I ran one roller cam over 100,000 miles of combined street and strip use.

BigBlockMark

That sounds like a good tip. Any way you can elaborate on this modification or maybe get a diagram or picture on this forum or at another location?