MichaelPSmith

All, looking to purchase some titanium lug nuts and have noticed that Porsche has the same or similar specs. Can anyone shed light on if 14mm × 1.5 mm Porsche would work for a C8 - I know that C8 Lugs have a 60 degree conical seat. Are Porsche Lugs the same spec?

Many thanks for the help.

winders

No. Porsche does use M14x1.5 lug nuts. But, Porsche uses R14 ball seats while the Corvette uses 60 degree conical seats.

Also, Porsche nuts are a 19mm hex head and use a 100 ft-lbs torque spec.

MichaelPSmith

thanks so much - really appreciate it!

\Boost Monkey/

https://ti-alloys.com/product-brands/titanium-lug-nuts/

Here ya go.

Zed Sled

Question: what is the weight savings per wheel as compared to the OEM steel lug nuts?

RisonTitanium

You can check if you love our titanium lug nuts https://ti-alloys.com/product/m12-m1...s-parts-20pcs/ and https://ti-alloys.com/product/rison-...-m14x1-25-1-5/, which normally will be fit for your C8, many thanks.

RisonTitanium

[QUOTE=\Boost Monkey/;1607341453] https://ti-alloys.com/product-brands/titanium-lug-nuts/

开始吧。[/QUOTE
]
Thanks so much dear ~

RisonTitanium

Normally, GR5 titanium lug nut is 30% Stronger Than Steel and Almost 50% Lighter.
You can check https://ti-alloys.com/product-brands/titanium-lug-nuts/ if you love our titanium lug nuts, many thanks.

winders

This is grossly misleading.

Grade 5 Ti bolts (6Al-4V) and somewhere between grade class 8.8 and class 10.9 in tensile strength. So, that means that grade 5 Ti lug nuts (6Al-4V) are somewhere between grade 8 and grade 10 lug nuts. The C8 Corvette uses at least Grade 10 nuts which are stronger than your TI lug nuts. Your site compares your Ti lug nuts to stainless steel. No one in their right mind would use M14x1.5 stainless steel lug nuts on a C8 with a tightening torque of 140 ft-lbs.

The minimum proof load of a grade 10 lug nut is 1100MPa. The minimum proof load of a grade 5 ​​​​​Ti nut (6Al-4V) is 900MPA.

Grade 5 ​​​​​Ti nut (6Al-4V) lug nuts should not be torqued to 140 ft-lbs. I would say that 110 ft-lbs is about maximum.

d16dcoe45

You sound like you never actually used or know that people track and race with titanium lug nuts yet you are giving your opinion on them anyway. I use to use M14 x 1.5 Grade 5 titanium lug nuts on my 3900 lb Chevy SS sedan with ZERO issues and I drove that car hard. And yes, I ALWAYS torqued to the factory spec of 140 lb-ft. I have been using Grade M14 x 1.5mm 60 deg conical seat titanium lug nuts on my FK8 Civic Type R for the past year and I drive this car even harder on a sticky 265/35ZR18 tire-I torque those to the factory spec of 93 lb-ft. Titanium STUDS are used in Circle Track and Drag Racing ALL THE TIME--their strength is proven! If titanium STUDS are plenty strong, you can bet that a steel stud/ti nut combo, is MORE THAN STRONG ENOUGH. The stock steel nuts GM use are soft--and I would bet they are WEAKER than a quality Grade 5/6Al-4V titanium lug nut. I don't even believe the stock steel GM nuts are even equal to an 8.8.TheFord GT comes with an option for titanium lug nuts (when you order the carbon wheels). And to go a step further, plenty of heavy Japanese cars like R33 and R34 Skyline GTRs have been tracking with high quality Rays forged 7075-T6 ALUMINUM lug nuts for years with no issues.

The reality is Grade 5 titanium lug nuts are PLENTY strong for a C8 or pretty much any street car. Don't think that GM specs a special "high strength" steel nut for the C8! It is the same type of nut made out of the same grade of steel you will find on a Chevy Trax. And it is NOT a very hard steel!

I personally install titanium lug nuts dry as any anti seize WILL mess up the torque readings. I used to use anti-seize but found it is completely unnecessary.The only time titanium hardware galls is when you are using a titanium STUD with a titanium nut. There ARE titanium wheel studs available and using titanium nuts with those ABSOLUTELY requires anti-seize as they WILL gall (titanium is a "grabby" metal, PARTICULARLY against itself)

Also, people replace OEM nuts with nuts at Autozone or Advance Auto all the time with no ill effects.

winders

i have raced for many years using M14x1.5 titanium lug nuts.

I know how to read specs and that 140 ft-lbs is too much for Grade 5 ​​​​​Ti nut (6Al-4V) lug nuts. Heck, 140 ft-lbs is just under the max torque of a Grade 10 steel M14x1.5 nut and that steel nut is 20% stronger than the titanium nut.

But hey, you keep ignoring those specs at your own peril.

Drew888

In general, medium alloy steel fasteners have about the same tensile strength as Ti and steel has a higher modulus. Steel has an infinite fatigue life and Ti does not. Steel has a density that is 25% higher than Ti and with the same geometry steel will weigh 25% more.

winders

Titanium is more like ~40% lighter than a steel part of the same size. Titanium has a density of 4.51 g/cm^3 while steel has a density of 7.8 g/cm^3. So titanium is about 42% less dense. The modulus of elasticity of 10.9 steel is 210 GPa. Grade 5 Titanium 6Al-4V is 113.8 GPa. This means that steel is much better at holding its shape than titanium under load.

Grade 5 Titanium 6Al-4V has an ultimate tensile strength of 900MPa and a yield tensile strength of 830MPa. A Grade 10.9 steel has an ultimate tensile strength of 1100MPa and a yield tensile strength of 1000MPa.

DSteck

The stud is more likely to fail before the nut.

winders

Not if the stud is 10.9 or 12.9 and the nut is titanium. The nut will strip first. Ask me how I know….one of my race support guys went a little crazy with an impact tool and stripped a ti lug nut on my Porsche which has M14 10.9 studs.