Centerforce Dual Friction Broke my Crank
 

At least that is what the engine builder is claiming.

He says that he has run a bunch of tests, and that a perfectly balanced engine will be way out of ballance when you bolt on the centerforce. He believes that the counterweights often don't all return to thier original position and therefore create a vibration that directly affects the crank. He says that he has seen three engines fail due to a broken crank over the years and all three had a centerforce clutches.

Anyone else had any trouble like this?

Bunk!!!

"He says that he has seen three engines fail due to a broken crank over the years and all three had a centerforce clutches."

I think I'd find another builder FAST.

Huh? Never heard such a thing.....were all three engines built by this same guy?

Maybe there's a corrolation how he builds the engines and the breakage....

Possible, maybe even likely IF the weights decided to gaul or otherwise freeze into place.

Fair warning, I guess, to check oocasionally for free movement.

Not bunk ,,,,,,,,,, I have seen this before !


geo

Seen it yourself or heard about it ? It sounds like the guy is using
a form of "logical BS" something that sounds logical but pure fiction :lol:

:iagree: Let's see the test data, curious as to the crank failure rate for Centerforce equiped eng's since I have one. :toetap:

Where did the crank break? Could be many reasons. Post pictures. You'll be surprized at how knowledgeable some of the Forum members are at this kind of analysis. A fair number of metallurgists (Norval comes immediately to mind) are on the Forum and can probably take a look at the fracture and determine what the nature of the failure was.


I hope my reference of Norval isn't an imposition. My apologies if it is.

I don't know about crank failures but we have had some pretty serious issues with the Centerforce DF clutches here. A lot of time the weights will not return to the center and will cause vibrations and premature clutch failures. I can't really see a crank breaking unless the vibration was horrible but it can lead to problem. I will never run a CF clutch myself, there are too many other good clutches out there to take a chance.


.

Well ain't that just dandy...disturbin news, for sure...have been running a Centerforce since 01, but not DF...

Centerforce has to be aware of the problem.......doesn't make sense to pump out a defective product

Never had a problem. Used the same one on three different engines, ranging from a 550hp 427. 732 hp 540 and a 400 hp 327. It's still working fine, has endured many 7000+ rpm blasts, launches on slicks and many street miles and crosscountry trips.

The only issue I had was it finally started to slip after I started making past 800 hp. Man...gotta hate that!


JIM

We've never had a problem with them up until a few years ago. Before that they were flawless. Something changed. :(



Paul

Paul: While Centerforce has a VERY bad rep for their LS1 clutches, their old school clutches are considered somewhere near the top of the line. I'm not sure why they can't seem to get the LS1 clutches to work but I was warned about them when I was putting my LS1 motor together. My old 350 had a CF clutch and I had no issues with it.

Yup....Made in China.... :lol: :lol:

:bs :sadangel: :bs :nono: :nono: :( :( :bs :bs :bs

We thought that same thing until we just kept seeing problem. Yes the LS1 clutches are horrible. We had vibration and total clutch failures in cars that have never had problems before like Mustangs and LT1s. I know they knew about the problem because they kept warranting clutches with no questions ask. Usually we have to beg clutch manufacturing to warranty the occasional failure. I don't know if things have changed in the last year but we just quit using them. We mainly do the SPEC, Ram, and McLeod clutches now.


Paul

Great news. :rolleyes: I just put one in.

Mine had a centerforce DF on it when I bought the car. It vibrated. Switched to the "zwede hybrid clutch" which is a Hays PP with a McCleod dual surface disc and never had a problem.

me too :(

Mine has been in for 6 years and many high rpm blasts. Never failed and has no vibration. I have had it out many times and it looks good each time so Ikeep putting it back in.