Engine DEAD!!


What BMF indicated is the fix.

Looks like an entirely new crankshaft to me.

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Looks like an entirely new crankshaft to me.

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If you see how little the stock crank fits into the stock balancer everyone would think about this mod, especially with an aftermarket blower and/or pulley. This gives turbos another plus since they would relieve some stress off of the balancer.
 
I understand what you are saying but Isn't the Pic BMF posted an entirely new billet crank? Maybe I misunderstood, but I thought you had something fabricated to allow either a stock damper or your own custom damper to engage more surface area of the stock crank snout.

It could also be that I am getting old and I don't see the extra "sleeve" on the Crank in BMF's pic.

As a Side note, in marine applications, the Fluid damper has fallen out of favor due to the elastomeric fluid becoming too viscous (and therefore less effective) over time. Any opinions about that here?
 
It is a new crank. It allows more meat at the tip of the crank for the balancer to attach to. My local guy fabricated a new balancer assy only, but it is double keyed and somehow covers more of the crank?? The longer snout on the crank would give much greater peace of mind regarding this possible point of failure.
 
Car and Driver, Sep 2010, page 32, has a good article describing variable valve-timing (VVT), cam-torque-activated (CTA), and oil-pressure-activated (OPA) dampers..
 
It is a new crank. It allows more meat at the tip of the crank for the balancer to attach to. My local guy fabricated a new balancer assy only, but it is double keyed and somehow covers more of the crank?? The longer snout on the crank would give much greater peace of mind regarding this possible point of failure.

Do you have a picture of your new balancer assembly? Sounds like it would be a great upgrade to an existing stock crank. Did you utilize an ATI damper on a custom sleeve and flange piece?
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It is a new crank. It allows more meat at the tip of the crank for the balancer to attach to. My local guy fabricated a new balancer assy only, but it is double keyed and somehow covers more of the crank?? The longer snout on the crank would give much greater peace of mind regarding this possible point of failure.

We have been doing this on the gt500's. Double keying the crank, But it does not at any lenght to the crank or any more coverage of the balancer on the crank. It does add much support to the balencer by having two keyways instead of one, as the g500 guys have been twisting the single keys with the big whipple and k.b blowers. This in drag racing applications has been done for many years with all sorts of blowers as the drive power to turn some of them is 500 hp plus. So at that point a single key way will just shear no matter how much of a press fit the balencer has.

This is a brand new billet crank btw. Has some upgraded features for making double the hp as a stock motor. It can also be ran on stock motor as well.

The stock crank only has around 1'' of material in front of the Timing gear, so there is no way to gain more material to the stock crank with out welding something to it.
 
BMF,

Which Balancer do you use?
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As I stated earlier...

I had to change my balancer back in the day, when I - due to the fact that I drilled a hole in it for the purpose of mounting a pick-up for a mag senor - found all of it's fluids on my floor pan.

I came upon a company that makes an after-market piece, and I started a tread that caused a right stir on our board. Perhaps some peoples opinions have changed over time, but anyway here it is:
http://www.fordgtforum.com/forums/showthread.php?9153-Crank-damper-from-Innovators-West&highlight=balancer
PS: In the end I went for the original balancer, just be safe that if something went wrong I wouldn't blame myself for trying to invent the deep dish all over again..
 
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If we assume that this crack did develop back then when you had the damper problem, then I think it is impressive that it has held op until now. How is that even possible with a car that has been used to its full potential.
 
You're right Anders, The car has been used in the way the original GT40 was designed to be used :biggrin I should feel so lucky - I'll tell that to my wallet..

B.M.F - That crank shaft looks awesome - I tried to PM you, but that's not possible, so could you perhaps email me with data, pricing ect. I also have questions concerning balancer, rods, cams and so on.
[email protected] That would be greatly appreciated :thumbsup

Thanks...
 
Innovators West