Cam gear wore down

yeh, figure that one out:16suspect The gear not the lobes

"why wont this car run right? Ive timed it but it keeps on pulsing and backfiring at 3000 rpms...."


by by trick flow cam

 

Were you using a steel distributor gear on a cast cam?
There really isn't enough information in your post - did you replace the cam after you found the worn gear?

 

steel gear on a roller cam. Even if it was an iron gear dizzy, wouldnt the dizzy gear wear down before the cam?

Just took out the cam today because i had nothing to do.

 

http://mmb.maverick.to/showthread.php?t=71062&highlight=backfire

 

Bryant is going to love this one.

 

i see it. ive heard of cams with cast gears on roller cams. i didnt think that the tfs cams did that. does the gear look like it was pressed on the cam some how?
the bad news is all that metal from the gear is in the motor. the metal could be in the bearings already. that will eat up you crank. at the least you will want to change the oil and put some magnets on the pan. it would be best to take the motor apart and replace the bearings after inspecting the crank.

 

Looks as if it was pressed on, so who do i call? a hospital for my heart or summit?

 

if you got it new from summit then you need to call them. do you have all the papers that came with the cam?

 

The gear should be pressed on and positively retained via a pin thru the gear and shaft. If the gear isn't in the correct place on the shaft, that will cause it to wear prematurely, irregardless of material it's made of.

 

I don't see how that'd be done as the cam gear is behind the first cam journal. The first journal would also need to be pressed on the cam core as well.

 

guess im going to go digging, hopefully i didnt toss it

 

If you bought it from Summit, they'll have a record of it.

 

ive only heard of cast gears being used on steel cams so you can run a more common dizzy.

here you your self say that the gear is pressed on. i know that the front bearing journal is infront of the gear and would need to be pressed on. i have never worked with one of these cams and dont even know if its done on ford. it could be for another make of motor.

or are you talking about the dizzy shaft?

 

Me thinks it's time for a close inspection of the Oil pump

 

Depends on the heat treat what types of gears the drive gear can tolerate. I've had roller cams that worked with cast gears and steel distributor gears, you should ask the manufacturer about this. A common reason for failure is the distributor gear bottoming out on the block causing a bind. The oil pump mentioned above is good advice, too.