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Eunos Cosmo - JCES (90-95)

Summary information for rotary-powered vehicles.

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DMRH
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Eunos Cosmo - JCES (90-95)

#1 Post by DMRH » Mon Sep 01, 2008 11:23 pm

It was the pinnicale of rotary development........THE EUNOS COSMO

PRE-PRODUCTION

The JC Cosmo was born out of the 80's & Mazda's yearning to create a multi rotor production car for the masses. The 1st glimpse of the pseudo Cosmo can be seen in the 1985 Mazda MX-03 concept car. Powered by a 13G triple rotor engine it featured many design features to be seen in later production cars such as the FC RX-7, BG-323, GD-626, HD-929.

The MX-03 was shown to the world in 85/86 & received praise everywhere prompting Mazda to turn the concept into a reality. The Japanese economic bubble was still growing, rotary sales where excellent & Mazda just wanted to do a multi-rotor top dollar Marque killer.

Image . Image

Image

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MODELLING

Mazda made several clay models from design sketches before moving onto full sized models for senior staff to approve. Mazda fully intended the Cosmo to be an exported world car meaning there must be a lhd version & this was shown in a full sized model. they made multiple full sized models following standard policy consulting with Mazda USA & Eurpoe along the way.


Image . Image

Image


SALES

Note: Mazda did not issue a year-by-year 20B-REW / 13B-REW split. Only a Series-I / Series-II split.

1990 = 4325 . . . . . . . . . . . . . . . 1993 = 0711
1991 = 1700 . . . . . . . . . . . . . . . 1994 = 0435
1992 = 1373 . . . . . . . . . . . . . . . 1995 = 0331

Series- I - (90-93) - 20B-REW = 3568
Series-II - (94-95) - 20B-REW = 0369

Series- I - (90-93) - 13B-REW = 4536
Series-II - (94-95) - 13B-REW = 0380

Production start = 24 FEB 90
Production cease= 06 SEP 95

Image . Image . Image



Identification

VIN prefix determines version

JCESE = 20B-REW Series-I
JCES .= 20B-REW Series-II

JC3SE = 13B-REW Series-I
JC3S .= 13B-REW Series-II

Image . Image

ENGINE

Type: . . . . . .20B-REW triple rotor with twin Hitachi turbochargers
Power: . . . . . 224kw @ 6500 rpm
Torque: . . . . 402nm @ 3000 rpm
Max boost: . . 0.65-Bar

Type: . . . . . .13B-REW twin rotor with twin Hitachi turbochargers
Power: . . . . . 176kw @ 6500 rpm
Torque: . . . . 294nm @ 3500 rpm
Max boost: . . 0.70-Bar


Image . Image


DRIVETRAIN

Gearbox

4-Speed electronically controlled Automatic. Jatco
Triple mode selection - NORMAL - POWER - MANUAL modes

Ratio - 20B-REW . . . . . . . . 13B-REW
1 = 2.78 . . . . . . . . . . . . . . . . . . .3.03
2 = 1.54 . . . . . . . . . . . . . . . . . . .1.62
3 = 1.00 . . . . . . . . . . . . . . . . . . .1.00
4 = 0.69 . . . . . . . . . . . . . . . . . . .0.69

Differential

Ratio - 20B-REW - 3.91
Type - Viscious LSD = 90-91
Type - Torsen LSD = 92-95

Ratio - 13B-REW - 4.30
Type - Open/single = 90-93
Type - Viscious LSD = 90-91
Type - Torsen LSD = 92-95

Note: 13B-REW model LSD+ABS combination optional on Series-I. Y200,000 option ($2300 approx)
Note: 13B-REW model LSD+ABS standard fitment on Series-II

DETAILS

Weight
  • 20B-REW
  • Type-S = 1570kg
  • Type-S.CCS = 1600kg
  • Type-E = 1610kg
  • Type-E.CCS = 1640kg
  • 13B-REW
  • Type-S = 1490kg
  • Type-S.CCS = 1520kg
  • Type-E = 1510kg
Length = 4815mm Width = 1795mm Height = 1305mm

Fuel capacity
20B-REW = 85lt
13B-REW = 72lt

CTY/HWY fuel consumption
20B-REW = 6.1km/lt
13B-REW = 6.9km/lt



MODELS

Engine:.................... 13B-REW - 90-92
Version:....................Type-S (Sports)
Price: ...................... Y3,390,000 + on road costs
1990 exchange rate...... $30,000 ($1:Y113)

Engine:.................... 13B-REW - 92-95
Version:....................Type-SX (Sports eXtras)
Price: ...................... Y3,410,000 + on road costs
1992 exchange rate...... $36,600 ($1:Y93)

Engine:.................... 13B-REW - 94-95
Version:....................Type-S.CCS (Sports. Car Control System)
Price: ...................... Y3,950,000
1994 exchange rate...... $52,600 ($1:Y75)

Engine:.................... 13B-REW - 90-93
Version:....................Type-E (Elegant)
Price: ...................... Y3,790,000
1990 exchange rate...... $33,500 ($1:Y113)

Engine:.................... 20B-REW - 90-93
Version:....................Type-S (Sports)
Price: ...................... Y4,290,000
1990 exchange rate...... $37,900 ($1:Y113)

Engine:.................... 20B-REW - 93-95
Version:....................Type-SX (Sports eXtras)
Price: ...................... Y4,310,000
1993 exchange rate...... $56,7000 ($1:Y76)

Engine:.................... 20B-REW - 94-95
Version:....................Type-S.CCS (Sports Car control System)
Price: ...................... Y4,910,000
1994 exchange rate...... $65,400 ($1:Y75)

Engine:.................... 20B-REW - 90-93
Version:....................Type-E (Elegant)
Price: ...................... Y4,740,000
1990 exchange rate...... $42,000 ($1:Y113)

Engine:.................... 20B-REW - 90-95
Version:....................Type-E.CCS (Elegant Car Control System)
Price: ...................... Y5,390,000
1990 exchange rate...... $47,700 ($1:Y113)

COLOURS

1990 = Brilliant black - Classic red - Titanium grey - Passion rose - Brave blue - Silver mist - Meteor blue metalic - Passion yellow mica
1991 = Brilliant black - Classic red - Titanium grey - Passion rose - Brave blue - Silver mist - Meteor blue metalic - Passion yellow mica
1992 = Brilliant black - Classic red - Titanium grey - Passion rose - Brave blue - Silver mist
1993 = Brilliant black - Classic red - Titanium grey - Black forest - Brave blue - Silver mist
1994 = Brilliant black - Classic red - Black forest - Creek blue mica - silver stone mica
1995 = Brilliant black - Classic red - Black forest - Creek blue mica - silver stone mica

Note: Passion yellow mica at Y200,000 option. Reported that less than 50 made in this colour.
Note: White not on list but some Cosmo's sold in this colour. As a special order only
Last edited by DMRH on Fri Oct 24, 2008 10:37 pm, edited 29 times in total.


The daily.............. 08 ER CX-7 . 2.3-MZR
The weekender...... 95 JC Cosmo 20B-REW

....Cosmo central ....>> www.dmrh.com.au << >> ....The Big picture... >> Our #1 priority <<

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Re: JC Cosmo - 90-95

#2 Post by DMRH » Fri Sep 05, 2008 12:10 am

1st GPS vehicle in the world

Although Pioneer was the 1st company to release aftermarket GPS receivers in 1989. It was a Mitsubishi-Electric system using the fledgling "GPS Japan" system fitted to the Cosmo that scored the "1st production car in the world" title.

Worth remembering is the fact that Japan did not have complete coverage in 1990 like we take for granted today. In fact, it wasn't until 1996 that there were sufficient satellites orbiting to provide accurate positional data for the everyday user. So early users of the system simply got accustomed to seeing their Cosmo (at times) projected 2km out to sea when travelling a coastal road.

6-years is a long time in the electronics world so as with anything electronic, it didn't take long for the Mitsubishi unit to become antiquated leaving the Cosmo well behind by mid-90's standards. So it stands today as a lonely icon to the ever growing GPS world. A world still too young to remember its roots.

Image


1st Sequential twin-turbo "series production" vehicle in the world

It was the limited production run (300) of Porsche 959 supercars in the late 80's that inspired Mazda engineers to utilize a sequential turbo system for enhancing rotary engine torque & maintaining flow through the rev range. Porsche had invested Millions into developing a practical sequential turbo system & typically, the Japanese copied, added their own ideas & made it practical for series production vehicles.

The sequential operation of the turbo's allowed the engine to produce over 90% of its peak torque of 402NM from just 2000rpm. Something no Rotary engine has ever achieved before & since. Various ECU inputs would crunch the numbers before allowing a smaller 2nd turbocharger to assist around the 3500 - 4000 rpm area in keeping the power surging right through to redline. For flow effeciencies & conservative attitudes, the boost was limited to just 0.65-bar. A figure many Cosmo owners have since altered to suit themselves.

Driving the sequential turbo system on the street gave a vastly superior feel compared to previous single turbo applications (HB-Cosmo + HC-Luce + FC RX-7). Boost came on significantly quicker allowing each rotor to be pressurised sooner resulting in a far more throttle responsive set-up than a single or non-sequential system could provide.

All this came at a cost & by the time the Hitachi based system was bolted onto the side of each engine, it practically equalled the cost of a 2-rotor engine. Little wonder why the JC + FD series where so expensive to produce.

Image

REMOTE CENTRAL LOCKING

The JC Cosmo was the first vehicle in the Mazda range to get remote central locking. A small IR-TX on the key ring transmitted to an IR-RX mounted near the interior light. No alarm system, just central locking. Although quite tame by todays security systems it was a first for a production Mazda & they had to start some where.

Image

CAR CONTROL SYSTEM

With all the power of a 386-era PC a Mitsubishi electric touch screen was used across a mini-CRT monitor. Taking advantage of a CRT monitor was a Television tuner. Although not the 1st Japanese car to offer it. (that went to the Mega limo's from Toyota & Nissan) It was the 1st affordable car in Japan to have TV as an option. The CCS option also gave you finger tip control on the steering wheel (another 1st for a Mazda) allowing Stereo & climate control options to be altered without lifting your hand. In all, your screen could switch between 8-modes.......
  • GPSS......................... Via fledgling GPS-JAPAN system
  • Traffic information........ AM radio frequency for local traffic snarls
  • Telephone................... Optional unit controlled via CCS screen
  • A/C.......................... Multi screen climate control
  • TV............................ NTSC system
  • Radio........................ AM-530KHZ-1588KHZ - FM-78MHZ-90MHZ
  • CD........................... 12 stacker unit in right rear sleeve
  • Tape player................. Graphical screen with all features
Side note: Mazda followed up in 1992 with an optional LCD screen TV for the Type-S + Type-E versions

Image

TECHNICALITIES

Smart..... 1st Mazda with Serial data communications. It's taken for granted today but the ECU talked to the ECAT via serial comms. Called the PALMNET system is was a standard that would be used by many manufacturers into the 90's. Serial comms was a major step into the digital era for Mazda who where the first Japanese company to do so. In Laymans terms.... The Engine computer & Transmission computer talked to each other much like a modem talks to a PC. (less wiring & devices to send & receive the signal means less cost)

Quiet ..... Mazda rated the Cosmo interior sound level at just 63DB whilst cruising at 100km/h. Thats super quiet limo territory or about the sound levels in a household living room with no TV or radio playing. In fact it was still possible to whisper to your passenger & be heard at 160km/h such was its refinement.

Pricey..... Still to this day Mazda do not have anything in their range that comes close to the Cosmo price tag. Its equivilent to over AU$100,000 in 1990 money if Mazda sold it here.

Collectable..... After winning Le-Mans 24HR in 1991 Mazda offered a limited edition commemerative badge only to 20B-REW Cosmo buyers. The multi-rotor Cosmo & race car shared something in common.

POSSABILITIES

Mazda where keen on the Cosmo as shown in this planned convertible version. However, it never made it past the 1/5th scale model stage. By 1993 Mazda was bleeding red-ink across the globe & all models had to cut back on costs.

A Series-III version was planned for but by 1994 the new Ford Masters had gone through Mazda cutting all non profitable programs & the Cosmo was up the top alonside Cronos. Sadly the Series-III got to theme sketches only.


Image . Image . Image

Image .
Last edited by DMRH on Sun Oct 26, 2008 8:53 pm, edited 20 times in total.


The daily.............. 08 ER CX-7 . 2.3-MZR
The weekender...... 95 JC Cosmo 20B-REW

....Cosmo central ....>> www.dmrh.com.au << >> ....The Big picture... >> Our #1 priority <<

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Re: JC Cosmo - 90-95

#3 Post by Steyr » Fri Sep 05, 2008 10:45 am

Dave, can you please change the subject line of this thread so that it is in a similar style to the other threads.


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Re: Eunos Cosmo - JCES (90-95)

#4 Post by ara8u » Sun Nov 30, 2008 3:25 pm

I need bushes...as do most of us....


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Re: Eunos Cosmo - JCES (90-95)

#5 Post by rodneooo » Fri Dec 05, 2008 12:25 pm

ara8u wrote:I need bushes...as do most of us....
+ 1

we need to make get a heap of solid bushes made up.

who knows a good machinist???


i have the part numbers somewhere. i can order one off mazda to use as a template.


lets get this bitch rolling boys.


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Re: Eunos Cosmo - JCES (90-95)

#6 Post by rodneooo » Fri Dec 05, 2008 12:44 pm

see group buys.


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Re: Eunos Cosmo - JCES (90-95)

#7 Post by OUR-13B » Sat Dec 12, 2009 9:56 pm

How many magazines covered the Cosmo when it was introduced.


13B twin turbo = Two rotors of turbocharged goodness

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Re: Eunos Cosmo - JCES (90-95)

#8 Post by rpathak1 » Thu Oct 18, 2012 11:17 pm

Worth remembering is the fact that Japan did not have complete coverage in 1990 like we take for granted today. In fact, it wasn't until 1996 that there were sufficient satellites orbiting to provide accurate positional data for the everyday user. So early users of the system simply got accustomed to seeing their Cosmo (at times) projected 2km out to sea when travelling a coastal road.The JC Cosmo was the first vehicle in the Mazda range to get remote central locking. A small IR-TX on the key ring transmitted to an IR-RX mounted near the interior light. No alarm system, just central locking. Although quite tame by todays security systems it was a first for a production Mazda & they had to start some where.



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