CJM (Justin's) drag build

phunk · 02-07-2019, 12:06 PM

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.

Spooler · 02-09-2019, 07:35 PM

Quote:

Originally Posted by phunk

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.

phunk · 02-09-2019, 10:39 PM

Quote:

Originally Posted by Spooler

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.

Elmo370z · 02-09-2019, 10:54 PM

Quote:

Originally Posted by phunk

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

Rusty · 02-10-2019, 12:38 AM

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

gbrettin · 02-10-2019, 11:43 AM

Quote:

Originally Posted by Elmo370z

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

Did someone say something about twin pump?!?!

Elmo370z · 02-10-2019, 11:53 AM

Quote:

Originally Posted by gbrettin

Did someone say something about twin pump?!?!

Charles!!!!!!!!

URBiN~HURMiT · 02-10-2019, 01:55 PM

Quote:

Originally Posted by gbrettin

Did someone say something about twin pump?!?!

yep, there's 2 of 'em

Elmo370z · 02-10-2019, 02:16 PM

Quote:

Originally Posted by URBiN~HURMiT

yep, there's 2 of 'em

Por que

URBiN~HURMiT · 02-10-2019, 06:52 PM

Quote:

Originally Posted by Elmo370z

Por que

https://youtu.be/d5ab8BOu4LE

Elmo370z · 02-10-2019, 06:57 PM

Quote:

Originally Posted by URBiN~HURMiT

https://youtu.be/d5ab8BOu4LE

No comprendo

Rusty · 02-10-2019, 06:59 PM

Quote:

Originally Posted by URBiN~HURMiT

https://youtu.be/d5ab8BOu4LE

URBiN~HURMiT · 02-11-2019, 08:52 PM

Quote:

Originally Posted by Elmo370z

No comprendo

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

Spooler · 06-29-2019, 01:51 PM

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

phunk · 06-29-2019, 07:05 PM

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.

02-07-2019, 12:06 PM	#31 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,654 Drives: 370 Rep Power: 944523	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. Rusty, Spooler and URBiN~HURMiT like this. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

02-10-2019, 12:38 AM	#35 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,851 Drives: 2011 Nismo GM 6M Rep Power: 2684436	phunk thinks on another level when it comes to the Z. URBiN~HURMiT likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

06-29-2019, 01:51 PM	#44 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,504 Drives: 2013 Nismo 370z Rep Power: 2684391	Justin, are we done yet. I have seen some pictures on CJ Motorsports Instagram page. It appears to be real close. Rusty, jchammond and redondoaveb like this.

06-29-2019, 07:05 PM	#45 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,654 Drives: 370 Rep Power: 944523	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. Rusty, Spooler, wideglideleon and 1 others like this. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

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