Hello guys!
I would like to take a minute to apologize for the horrible microphone quality, and my insanely poor camera skills!
With that being said, we wanted to share this tear-down video of a VR38Dett that we recently received. This particular GTR unfortunately lost a wrist pin during a 6-5 downshift, which tossed one of the connecting rods out of the side of the block, the chunks then caused another piston to completely break in half from the wrist pin boss area.
This car was on E-85 fuel, Full bolts ons and Forced Performance Green turbochargers, no horsepower and torque numbers were produced as the vehicle was remove tuned from another state. No oil starvation damage could be found, as all the bearings looked pretty good for a failure of this magnitude.
In this video, we fully disassemble the VR38 longblock, talk about some VR38 Specific piston/con rod combinations, and talk about the plans for the build in general.
A full detailed video of the Long block build will be released later as we progress, including how to time the engine, blue-printing the rotating assembly, and sharing our knowledge as we always do and hoping you guys can enjoy and take away something from the content.
This build will be a very interesting one. The VR38Dett is not torque plated from the factory, it is an aluminum alloy block, with a steel plasma coating sprayed onto the cylinder walls. This gives us very little room to work with as far as machining goes. The VR38 also works on a graded piston sizing system. Grades 1, 2 , and 3 are the sizes that the blocks can accommodate. These numbers are stamped on the block, and if one were to do a drop in piston and rod upgrade, all they would need to do is order the proper grade of pistons, (Size) and put the slugs in the bores and be good to go. However, as we always mention, without a torque plate being used, the cylinder is often pretty distorted and will not seal and perform as well as a perfectly round and true cylinder will.
Now, the graded pistons are specifically meant to be ran in these blocks, and hence are designed around the fact that the bores are not perfectly round, which is a very interesting design all by itself, however, even with a piston being designed around this system, you still do not benefit from having a perfectly round piston, in a perfectly round cylinder. This is why we will be using special, and slightly oversized custom Mahle Pistons, with hard anodized top ring land grooves to prevent micro-welding and ring flutter issues. This piston as mentioned is very slightly over sized, so we can actually utilize a torque plate during the machining process and true up the bores.
All machine work for this particular engine build is being done by our good friends at Dsport. Assembly and blue printing will be done in house as always by us.
The heads will also receive some pocket porting work, CNC Resurface to our desired RA (Roughness average) Tomei 274 (11.3mm lift) camshafts and much more.
Here is a quick list of the build:
Brand new Nissan VR38 Engine block
Brand new Nissan VE38 Cylinder heads x2
Brand new Nissan VE38 Crankshaft (WPC/ super micro polished)
Brand new Nissan VE38 Master gasket set
Brand new Nissan VE38 Oil pump
Brand new Nissan VE38 Head bolts (Same clamping force as the ARP CA 625+, very strong bolts)
Brand new Nissan VE38 Lower cast oil pan assembly
Mahle Custom pistons
CP-Carillo Pro H-Beam connecting rods with 3/8 CARR bolts
Tomei 274 camshafts
King XP series PmaxKote Main and rod bearings
Brand new Nissan VE38 Thrust bearings.
And much more...
Stay tuned for the results, the client may also want to upgrade the turbos, and the clutch packs to make some crazy horsepower. We will keep you guys posted as the project makes progress. As always, thank you for watching and hope you enjoyed the video!
Regards,
-JRP Performance, LLC
