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Titan x T1GTR R35 Nissan GTR Flywheel Bolt Kit

Titan Motorsports T1 Race Development ARP Flywheel Bolts

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#1 TitanMotorsports

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Posted 23 May 2016 - 01:25 PM

Leading the path to big horsepower from the VR38, we’ve found many parts that aren’t up to the task of reliably delivering performance beyond Nissans original benchmarks. Upon a resent teardown we noticed some abnormal fretting of the flywheel in the areas where it mounts to the crankshaft. This particular failure can be seen when tearing down the engine, but it also could be the reason for the engine teardown. This fretting requires replacement of the crank and/or flywheel in most situations. It goes without saying, this is a very expensive repair.

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A joint venture between T1GTR, ARP and Titan Motorsports resulted in a custom designed and manufactured fastener to better cope with the higher torque loads requested in our GTR applications. The new fasteners are produced In ARP’s 2000 material with a black oxide finish, and require a 12 point ½” socket for assembly. The ARP 2000 material has a much higher tensile strength of 220,000 PSI versus the stock bolts rating of 140,000 PSI. The increase in tensile strength allows us to administer a higher torque spec of 140ft/lbs. We also recommend applying Blue Loctite for added insurance, it’s important that the Loctite only gets on the threads of the bolt, and not between the flywheel and crank, or bolt head and flywheel.




These are in-stock, ready to ship

Edited by TitanMotorsports, 23 May 2016 - 01:26 PM.

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#2 m0cha

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Posted 24 May 2016 - 10:04 AM

Very cool. Glad to see the heavy hitters coming together!

#3 Essa_qa

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Posted 06 October 2016 - 05:35 AM

Pm me

Edited by Essa_qa, 06 October 2016 - 05:36 AM.


#4 siturbo

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Posted 06 October 2016 - 10:51 AM

I know this thread is old, but can someone explain how/why the fretting happens. I don't get it. Do the stock bolts allow some movement of the flywheel on the crank? Are the stock bolts flexing?
2010 Corvette ZO6

#5 JDMEK1

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Posted 13 October 2016 - 03:08 PM

1. high revs pushing the crank and flywheel assembly through the vibration periods
2. Poor fit, allowing slight movement
3. an in balance in something causing fretting at lower revs.

#6 CasualObserver

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Posted 13 October 2016 - 03:15 PM

I know this thread is old, but can someone explain how/why the fretting happens. I don't get it. Do the stock bolts allow some movement of the flywheel on the crank? Are the stock bolts flexing?

As with any fastener going through a clearance hole as these do (through the flywheel), the only thing preventing relative motion of the two parts is the clamping force supplied by the fastener x Coefficient of friction between the flywheel and crank. What you end up with is relative motion between the flywheel and crank, and it can be very high frequency and under a lot of force. This creates hot spots that you see on the flywheel.
The new fasteners have a much higher tensile strength. This higher TS allows more torque which in turn creates more clamp load which means it will take more force to induce relative motion between the two parts.



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