Stock Nissan bolts are TTY (torque to yield) fasteners, thus are not tightened to a torque spec. It is a different type of strategy for fasteners. After a uniform 30# is set they are tightened an additional 270 degrees (135+135).

VR fasteners are 1mm larger thread diameter than VQ fasteners. M12 vs M11.

Things that make you go hmm.

For what it’s worth, the stock VQ fasteners spec is 30# + 190 degrees (95 + 95).

That’s 80 degrees more rotation in the VR fastener over the VQ. They are both 1.25mm thread pitch, so that simplifies the pondering a little.

Being the same thread pitch is the only reason we could do it without going even larger then bringing it back down with thread inserts. Drilling up 1mm doesn’t clear out the original threads. But since they are the same pitch, we could carefully start the m12 tap in what was left of the original threads to oversized them just 1mm. It takes great care.

Also, the bolts are MUCH longer.

Then making them fit the heads was a whole other adventure. We made a fixture for mounting the heads into the CNC for machining programs to be run on them.

I’m over here just trying to get a twin pump

phunk thinks on another level when it comes to the Z. :tup:

Did someone say something about twin pump?!?!

Charles!!!!!!!!

yep, there's 2 of 'em

Por que

No comprendo

:rofl2:

"1" is only 1 and alone | "2" is better than "1" (maybe :-)
Just my Irish humor kickin' in here!

Justin, are we done yet. I have seen some pictures on CJ Motorsports Instagram page. It appears to be real close.

The car runs but currently cannot drive due to a clutch problem. The components are too warped to allow disengagement. The car sits awaiting clutch rebuild components from OSG.