Cam damage opinions. - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 17 Old 03-19-2017, 03:24 PM Thread Starter
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Cam damage opinions.

This is my cam from my 347. It took a little nick on the side of a lobe, and has some discoloration around the spot. It doesn't look like it's in the lobe where the lifter was rolling. I'm wondering if it's still usable.





Also the balancer from the same motor, it looks like there was a chip that came off the crank? I don't know but it pulled off hard and you can see the scarring down the snout and you can feel some roughness in the balancer.. Plus it hit something on the outside but it still feels the same texture as the rest, so I'm pretty sure that's just cosmetic.








83 Mustang GT Black on black
New motor in works. 302, 11r 190 heads, Buddy Rawls cam.
82 Capri. 393W, sold
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84 LX vert. 347, gt40x heads, e303 cam, modded AOD,
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post #2 of 17 Old 03-19-2017, 09:21 PM
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It looks like you've been running it that way for a long time. The cam is probably fine. The keyway on the Damper however looks worn and elongated.

What was the reason for the teardown?

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post #3 of 17 Old 03-19-2017, 09:58 PM Thread Starter
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Nope, it was a kinda happen all at once damage. LOL... Had about 3500 miles on the build a Fordstrokers Liberator with 11r 190 heads. Just to much power for the stock block.



The keyway is weird it's kinda stepped like that. But if you look at it you can see on the one side it has a rough spot that coincides with the scratch on the nose of the crank.

83 Mustang GT Black on black
New motor in works. 302, 11r 190 heads, Buddy Rawls cam.
82 Capri. 393W, sold
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post #4 of 17 Old 03-19-2017, 10:55 PM
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Ouch man, sorry.. What were the specs on the build besides the 11R's? Were you spinning the motor hard?
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post #5 of 17 Old 03-20-2017, 07:55 AM Thread Starter
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Mahle flat pistons, Scat cast crank, custom cam, ect. , carbed combo for the street. It made max power at 5700 and I really tried to keep it under 6. When this happened I was at less than WOT and at about 4500 rpm.

83 Mustang GT Black on black
New motor in works. 302, 11r 190 heads, Buddy Rawls cam.
82 Capri. 393W, sold
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post #6 of 17 Old 03-20-2017, 09:14 AM
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HOLY CRAP LOOK AT THAT BLOCK CAN YOU SAY R302!!!!!!!!!!!!! I would reuse the cam no problem but the balancer would have to go.To be honest with you i would not buy a cheap junk balancer from the start.
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post #7 of 17 Old 03-20-2017, 01:04 PM Thread Starter
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Quote:
To be honest with you i would not buy a cheap junk balancer from the start.
Are you saying that this one was?

83 Mustang GT Black on black
New motor in works. 302, 11r 190 heads, Buddy Rawls cam.
82 Capri. 393W, sold
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post #8 of 17 Old 03-20-2017, 04:26 PM
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JB weld? Seriously though, I think I'd ask the cam company or maybe Ed Curtis. On another forum I hang out on, one of the guys I'm friendly with has a 66 Mustang that he road races. His last 289 broke the same way. On his new motor he went internally balanced. He believes the unbalance weight on the balancer causes the problem with the constant acceleration and deacceleration but too much stress on the nose of the crank. His new 289 with 289 cast iron heads with a wonky distributor made 435 HP. He did go to an aftermarket block, I think a World Products.

Demise of his engine

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post #9 of 17 Old 03-20-2017, 04:35 PM
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I only believe in ATI balancer's.I think all others are inferior.

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post #10 of 17 Old 03-20-2017, 05:28 PM Thread Starter
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Dude I wish mine had sounded like that. I heard bang and pieces were flying, then dead stop.


83 Mustang GT Black on black
New motor in works. 302, 11r 190 heads, Buddy Rawls cam.
82 Capri. 393W, sold
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post #11 of 17 Old 03-20-2017, 10:03 PM
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How much power were you putting down?
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post #12 of 17 Old 03-20-2017, 11:32 PM Thread Starter
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I hate to say it because I feel it's misleading. But it put down 350 on a very stingy dyno, in 95 degrees and raining. They guy who went right after me had a 2015 GT with full bolt ons and tune, and put down 4 more hp then me. I've seen those put down 425 on a dynojet . I spit out a t5 as soon as I started trying to really put power to the ground.

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New motor in works. 302, 11r 190 heads, Buddy Rawls cam.
82 Capri. 393W, sold
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post #13 of 17 Old 03-21-2017, 12:35 AM
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IMO, any stock roller block stroker (especially 347) that's much more than mild oughta come with a disclaimer stating the dubious longevity and an "after-market block savings envelope" bolted to a valve cover...

Forgot how bad that looked...dayum, sorry man!!
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post #14 of 17 Old 03-21-2017, 01:38 PM
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Quote:
Originally Posted by 4eyedfoxdriver View Post
I hate to say it because I feel it's misleading. But it put down 350 on a very stingy dyno, in 95 degrees and raining. They guy who went right after me had a 2015 GT with full bolt ons and tune, and put down 4 more hp then me. I've seen those put down 425 on a dynojet . I spit out a t5 as soon as I started trying to really put power to the ground.
I believe you.I had a stock bottom end motor that tuned put down 335 on a mustang dyno.The car i still have(hatchback) and at the time it had everything still on it with working a/c.Went a best of 12.0 at 114mph at Rockingham

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post #15 of 17 Old 03-21-2017, 01:50 PM Thread Starter
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Quote:
.I had a stock bottom end motor that tuned put down 335 on a mustang dyno.The car i still have(hatchback) and at the time it had everything still on it with working a/c.Went a best of 12.0 at 114mph at Rockingham
That's about what I'm hoping for. I have a stock block getting rebuilt with rings and bearings, full balance, 11R 190 heads , Buddy Rawls cam, RPM Performer intake with 1in spacer and QF 650 carb. Exhaust is 1 5/8 shortys, O/R H-pipe to Dynomax catback out the back. The rest of the car was already built up for the 347 so it should have no problems . I know it won't run like the 347 did, but I'm hoping to be able to beat on it for a while.

83 Mustang GT Black on black
New motor in works. 302, 11r 190 heads, Buddy Rawls cam.
82 Capri. 393W, sold
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post #16 of 17 Old 03-21-2017, 04:49 PM
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It's cool that you have a backup!
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post #17 of 17 Old 03-21-2017, 05:15 PM
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In that video idk if it's stuff coming up from the road hitting the underside of the car but it almost sounds like a ping I wonder if that had to do with the blown motor

1992 black notchback... 347 boss block, ford z aluminum heads, 80lb injectors, edelbrock rpm II, vortech v2 s trim, tko 500, 3.55 gears
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