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Jan 6, 2021

Bluecar maintenance : R32 GT-R Oil Change and Spark Plug Change

R32 GTR from Toprank Importers - R34 TV2 Bayside Blue
Doing a spark plug change on the bluecar TV2 - R34 Bayside Blue

This bluecar is still hanging around, since 2020 did a number on Bigbird2 . I took some parts off it, but I may put some of those parts back onto it for a future track day.  We missed R's Day in 2020, so itching to get to the track with some of the guys from Toprank Importers. A few R32 GT-R, and at least one JDM MK IV Supra on track should be fun. Maybe a Streets of Willow, or Buttonwillow day is in order.  

Toprank Importers in Cypress, California

These Grypmats are great. They are a nice soft place to put all those things you are working on in the engine compartment.  Even if you have work carts, and tool trays. They have a few different sizes, but we bought a 3 piece set. 

My ARC is like this, but I have a bigger secondary cooler.  This one is for sale on ebay

It has been a while since I changed oil. So as always do as I say, not as I do.  This car has a Greddy oil cooler kit, and an ARC grille oil cooler in it. The Greddy kit has a remote mount oil filter.  I use the K &N HP 2008 oil filters. I like the 1 inch nut on the end, and the ability to lockwire it in place. 

  • K & N HP-2008  (discontinued)
      • 3/4-16 thread
      • 4.280 inches height (108 mm)
      • 3.120 OD (79 mm)
      • Anti drainback valve
    • Replaced by the K & N HP-1002
      • 3/4-16 thread
      • 3.75 inches height (95 mm)
      • 3 inches OD (76mm)
      • Anti drainback valve

For oil, I have been on the XRP Royal Purple 10-60 for a while, but I only had 3 quarts at home.  It also seems to be discontinued. So I mixed in a few quarts of Redline 10-60. I fill it to the bump, which is above full on the dipstick.  The RB has decent windage in the bottom. I have coolers, and the engine wants more oil than the stick shows as high.  Oil Pan Testing on an RB26

Engine Oil Capacity (quarts)
H Level4.24.34.8
L Level3.23.53.7
Oil and Filter Change~ 4.4~4.8~4.9

Then onto the sparking plugs for the most glorious engine as the RB26. Even though the troglodyte consensus is that a copper spark plug is the only plug to use on an RB26, we have other thoughts.  For our own personal cars, we only run the best spark plugs. In this case, its the double fine wire, NGK Iridium Spark plugs

NGK Racing Spark Plugs for RB26dett R7436-8

NGK R7436-10 and a street car BCPR7Eix spark plug Part number 5690

The non projector, double fine wire NGK plugs, are the best plugs I know of, and have used for over 15 years. When price is no object, these are the plugs I use.  The heat range I use depends on the car use and horsepower.  Normally its a -8 to -10.  The 10's being the coldest, and running those on the road courses on a hot day. 

So whats the best plug for an RB26dett?  I say its the :

You are welcome to run old school copper plugs. Make sure you get the right length, make sure you change them often. Learn how to read them. Keep the rest of your ignition system in top shape, to make up for a harder to fire spark plug. 

"Although the NGK factory will set the gap to a preselected setting, this may not be the right gap for your particular engine. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy and accelerated plug wear. It is always best to check the gap against the manufacturer's specifications. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium, be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. The gap should be adjusted by only moving the ground electrode. 

Another consideration that should be taken into account is the extent of any modifications that you may have made to the engine. As an example, when you raise compression or add forced induction (a turbo system, nitrous or supercharger kit) you must reduce the gap (about .004" for every 50 hp you add). However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005"."

The Great Spark Plug Debate: Separating Fact From Opinion - Engine Labs

"One of the most contentious areas of disagreements surrounds fine-wire spark plugs. It seems that everyone has an opinion about platinum and iridium plugs compared to the standard copper-core version. We’ll just start by saying that there’s a good chance that whatever you’ve read or been told about fine-wire plugs is probably incorrect." Read more

So the bluecar has one of the very first Supertec Racing R35 coil conversion kits on it. Along with a Wiring Specialties harness for R32 GT-R to smart coil. This harness eliminates the ignitor box, and is plug and play. The coil harness on the R32, R33, and R34 is one part that is different on each car. The connectors for power are different. Coil ends are the same. 

R35 ignition coil adapter plate - early for the RB26dett

We didn't do any changes to the dwell, or firing time of the coils, and have had it on for about 3 years now. The car with the Nistune will show a code 21 which is because the ignitor is missing.  So we pulled the coils out, put in some new R7436-8 spark plugs, put some dielectric grease, and buttoned it up. 

Now it still needs some more maintenance. Rear wheel bearings. Nismo extended studs, check out all the suspension components. Nut and bolt the car. New tires, the RE71R are great, but they are old take offs. Brake master cylinder needs changing.  Some new brake pads.  Retune/rescale the Nistune. Crank up the boost. 

Buy USA Legal R32, R33, and R34 Skylines at!
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