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Wednesday, May 13, 2015

Replacement 12V Batteries for Nissan Skyline GT-R - R32

RB26DETT on a Battery Tender
R32 GT-R Battery on a Battery Tender
When cars sit, the battery has a tendency to go flat or dead. Accessories within the car pull a small load on the battery, and eventually there is no more power. If you let it sit for long enough, you kill the 12 volt battery.

The R32 Nissan Skyline GT-R has a pretty small 12V battery. It is also a fairly easy car to start. Its not some huge compression big block. its a short stroke inline 6 that doesn't need a whole bunch of CCA to start.

The OEM battery is small (approx 7 1/4 wide, 7 3/4 inches tall, and 5 inches thick), and they have Japanese sized terminals. Which means they are smaller. Not as thick as American terminals. Nothing else meant by those statements at all. Keep it clean.

When my R32 GT-R arrived, the battery was flat. It was one of the first things I was expecting to replace. However, I had a Battery Tender at home, plugged it in, and the car has been starting strong since. (2+ years). I highly recommend keeping a car you don't daily drive on a tender.

An AC Delco Battery for an R32 from Japan.

Product number: 40B19R (V9550-5006) control number: DBT-N589
340 CCA  32 AH

Yuasa Batteries from Japan

w ModelModelC.C.ANominal Voltage (V)Capacity (AH)Dimensions (mm)Weight with Acid approx. (KG)Electrolyte approx.(L)Regular charge current(A)Terminal Layout
5 HR20 HR(L)(W)(H)Overall (H)LayoutTerminal


About 20 lbs.
A type terminals

Y type terminals

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So what can you get in the US that works?

An Odyssey PC680.  Small battery. They are more for motorsports type applications. They really need to be left on a tender. They don't have a lot of reserve capacity. Once you kill them once, I've never been able to bring them back to life.  Still loses about 5 lbs compared to a stock size battery. Plus there are correct terminals available. Prices aren't horrible.

Pulse (5-second) Hot Cranking Amps (PHCA)520
Cold Cranking Amps (CCA)170
20Hr Nominal Capacity (Ah)16
Reserve Capacity Minutes24
Dimensions L x W x H (in)7.15 x 3.00 x 6.65
Metric Dimensions L x W x H (mm)181.5 x 76.3 x 167.8
Weight (lbs)15.4
Weight (kg)7

These guys have the Japanese JIS terminals that screw into an Odyssey battery.

Optima Red Top

This will last longer, but the car will gain some weight on the nose.  About an 11 lb gain.

Battery Model:25
Part Number:8025-160
NSN:Number applied for, product currently available
UPC Code:8 11405 00160 4

Performance Data

Cold Cranking Amps:720
Cranking Amps:910
Nominal Voltage:12 volts
Open Circuit Voltage (fully charged):12.8 volts
Internal Resistance (fully charged):0.0030 ohms
Capacity:44 Ah (C/20)
Reserve Capacity:BCI: 100 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)

Physical Characteristics

Plate Design:
High purity lead-tin alloy.  Wound cell configuration utilizing proprietary
Sulfuric acid, H2SO4
Case Color:Dark Gray
Cover Color:“OPTIMA“ Red
Group Size:BCI: 25
Post Type:SAE Post
Weight:31.7 lb

Friday, May 08, 2015

1989 Nissan Skyline GT-R For Sale in the US : NHTSA exempt : EPA Exempt

1989 Nissan Skyline GT-R : Legal in the USA. Over 25 years old NHTSA exempt. Over 21 years old EPA exempt
Check it out here -

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Saturday, April 25, 2015

Can I Run Different Sized Tires on My Nissan Skyline GT-R? NISMO R32 GT-R with R34 GT-R Wheels. 18 x 9 +30  245/40/18 Toyo R888

Can I Run Different Sized Tires on My Nissan Skyline GT-R?

A: A Nissan Skyline GT-R came with the same sized wheel and tire front to rear.

  Stock wheels and tire sizes
R32                 16 x 8 +30  205/50/16
R32 Vspec      17 x 8 +30 225/50/17
R32 Vspec II  17 x 8 +30 245/45/17

R33  17 x 9 +30  245/45/17

R34   18 x9 +30 245/40/18

The ATTESA, or all wheel drive system in a GT-R, uses inputs from the throttle, from the G-sensor, and from the ABS/wheel speed sensors to lock up the center differential.  If the wheel heights are different, they rotate at different speeds. The ATTESA/ABS ECU sees this as slippage. This causes lockup of the center diff. That constant lockup can lead to heat, slippage, and burning out the transfer case clutch pack.

ATTESA System overview technical document

So, can you do it?  The answer I like to give people is - NO.  The reason is because I don't want them to do something wrong, and screw up their transfer case or ATTESA system, and blame it on me.

The real answer is, if the overall heights/diameters are similar enough, you can get away with different sized front and rear wheels, tires, etc.

There are no specs in the R32 Service manual, but the R35 service manual says

Diameter difference front/rear
0-4 mm STOCK
4-8 mm OK
8mm- and greater NO GOOD

I have seen worn tires throw an ATTESA code. You could get a code running tire pressures way wacky ie 40 psi in 3 tires, and 20 psi in one.

Most often people try and do some kind of staggered setup, don't do the calculations before they purchase tires, and now end up with a 2wd Nissan Skyline GT-R.  Which may sound like fun, until you want/need the all wheel drive.   So always check the diameters, make sure before you buy anything.  The safe way is stay square. Lets you rotate the wheels and tires around the car. Great for real cars that run on the race track, and even street car guys that run some miles.

Tire Rack Calculating tire dimensions

If you are looking for R35 Nissan GT-R information on the same subject - check out - Nissan GT-R Wheel and Tire Fitment at

R32/R33 transfer case

Transfer case internals. Clutch pack, front drive, and chain
R32 ATTESA Codes
R34 ATTESA Codes

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NISMO option wheels. 16 x 8 +30. 255/50/16 Mickey Thompson ET Street Radials

World Challenge Nissan Skyline GT-R Pictures from 2005-2006 R34 GT-R headed up Pine Avenue in Long Beach
Check out some pictures of the Automotive Forums R34 GT-R from 2005 to 2006. This car ran in World Challenge GT for part of the 2006 season.

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