If you look on Mighty Diesel's Site it says that "4 of the washers will need additional modification" i dont know what that is about , Tony brought them in and they Put them in as they were and there wasnt any sort of additional modifications , direct bolt it.

You put a strip of grease down the threads and a strip under the head to hold the washer up ,

the reason you just put a strip down the threads is because if you put too much you may get pressure from the bottom of the hole and it will throw off your torque wrench

 

i went and had washers turned down for this. they are already fixed when you buy them now.

 

Nice !

 

Anyone pull these bolts pass factory tq specs?

I plan to get a set.

 

Wow - good idea, but I ain't gonna address the problems in this thread.

Saving my fire suit for the track!

 

So, how do these bolts hold more load compared to a stock head bolt? These bolts are still a stretch to yield bolt. Does anyone have any load test sheet analysis or anything? Just curious as this could be an option for customers, but I'm very leary about them. Will Tony stand behind labor claims if these bolts are installed on a big boost engine and the head gasket still blows? Again, I'm asking because these could be a great product. But it has me worried since these are still stretch to yield.

 

The specific attributes of different bolts can change there clamping force. I imagine they yield at a higher force, allowing for more clamping force on your head. Heck, it is possible to have a bolt so strong it will pull your thread out of your block, but who wants that

 

How do you figure they're "stretch to yield" w/o a reduced shank?

Hex key socket cap bolts in that size are typically 180Kpsi tensile strength, which is certainly adequate for OEM power levels.

The cost is cause for most concern - those bolts at that price point indicate that they're imported (not automatically a bad thing), but not something that's confidence-inspiring either.

Holo-Krome & Unbrako (both high-quality manufacturers) cost over 4X as much for the same pieces.

 

I guess the skeptics should just stay away from them I guess.

2 bolts, the same size, one an 8.8 and the other 12.9, one will have a hell of a lot higher yield. Size is only half the formula.

 

If it isn't a stretch to yield bolt, why would you torque it to 90ft. lbs. and then go 90*? That indicates a stretch to yield bolt. Other wise you would just have a final torque, not an angle of rotation.

---AutoMerged DoublePost---

Skeptics? I guess you don't care what you are actually buying. That's why you ask questions.

---AutoMerged DoublePost---

Skeptics? I guess you don't care what you are actually buying. That's why you ask questions.