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Studs Vs Bolts true or false
Sounds like they are laying it on a bit thick. But turblown is pretty rebutable so what do you think? Is the below statement an accurate one? Would this be equivalent to arp bolts ect...
Turblown Engineering 13B stud kit -Aircraft quality forged steel -Hot rolled threads, allen head tips -195000 psi tensile strength -No machining is required -Works with OEM or aftermarket flywheels -Replaces all 16 inner tension bolts Why choose studs over bolts? Studs offer precise torquing of fasteners over bolts. Instead of twisting a bolt to achieve a desired torque reading, studs are stretched. Twisting creates friction, friction gives false torque readings, and the end result is a lower actual torque reading. Thus clamping force is reduced. These studs are made from far superior material, applied clamping force is increased even with the same amount of applied torque over bolts. Stud expansion is limited, while inferior oem bolt material allows them to stretch, and reduce clamping force. Studs are easier on front iron threads, OEM bolts cause wear and tear on threads. OEM bolts can tear front iron threads out. Acoustic harmonic and resonances problems are reduced from the superior material used in stud manufacturing. Engine expansion and movement is reduced with greater clamping force, a must for turbocharged or high horsepower engines. http://cgi.ebay.com/ebaymotors/Rotar...QQcmdZViewItem |
For the most part, what they say is true to some extent. However, IMO, some of it is over the top but that's marketing. There are several of us on the forum using those types of studs in engines:
https://www.rx7club.com/rotary-car-performance-77/engine-stud-kits-608130/ https://www.rx7club.com/rotary-car-performance-77/engine-pics-pros-will-appreciate-554910/ https://www.rx7club.com/rotary-car-performance-77/engine-bolts-question-481743/ |
There is no question, studs are always better than bolts, but do you really need them? For NA and Turbo running stock bust, there is really no need for studs, except the let you align gaskets much easier. Now if you are going to have extreme busts levels then you will need the studs. For rotary, bolts should be enough. For comparo, in diesel world on my truck 40PSI bust is a everyday occurrence, and we are running bolts. anything above 45PSI should be changed to studs. As you can see rotary has a long way to go.... :rlaugh:
Also, it is not as easy as removing bolts and putting studs in. You have to make sure all your holes are bottom tapped and cleaned, only then you will get your moneys worth from the studs. |
Just thinking in terms of if and when I do a rebuild, and I can get them for a reasonable price, Why not. If it helps in the future if I happen to go High boost or really high HP ect..
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