CA20DET powered Gazelle

Candellan · Post by **Candellan** » Fri Feb 19, 2010 8:03 am

1984 Nissan S12 Gazelle GL Hatchback

Motor:
CA20DET: Standard S12 CA20E block + CA18DET head
Internals: All new ACL pistons (not forged), rings, gaskets, bearings & seals. Stock rods shot peened.
Turbo: Lancer EVO III TD05H-16G
ECU: Power FC with Datalogit FC Edit
Boost Control: Apexi AVC-R
Cam Profiles: CA16DE 248deg - 8.5mm
Injectors: Trust 550cc/min
Bore & Stroke: 85.55mm x 88mm

Driveline:
Clutch: Exedy 5 Puck
Differential: H190 (Torsen LSD) 3.9:1
Front Suspension: HSD HR 7kg Coilovers (15 step damper)
Rear Suspension: King Springs & HSD HR Seperated Coilovers (15 step damper)
Front Brakes: R33 GTST 4 pot calipers & EBC Yellow Stuff pads
Rear Brakes: Bluebird TRX S3 with EBC Red Stuff
Front Wheels: Keiichi Tsuchiya 16x8" +35 with Bridgestone RE55S 225/50/16 tyres
Rear Wheels: Enkie Racing 16x8" +32 with Bridgestone RE55S 225/50/16 tyres

The figures that matter:
Current Power (@ wheels): 269hp (200.7kw) @ 6000rpm
Current Torque (@ wheels): 359.5nm (36.66kg/m) @ 4352rpm
Current Boost: 1.034bar (15psi)
Rev Limit: 7000rpm

Latest dyno sheet:

Lap Times:
Lakeside Raceway: 1:01.75
Queensland Raceway sprint track - 1.01.8479

You Tube:
Lakeside footage:
Lakeside 2/8/09 Session 1 (boost leak)
Lakeside 2/8/09 Session 2 (hose clamp failed)
Lakeside 19/7/09 Session 1
Lakeside 19/7/09 Session 3
Lakeside 19/7/09 Session 4
Lakeside 18/6/09 Hungry Corner (Thanks to Super Pa)
Lakeside 18/6/09 Session 2
Lakeside 18/6/09 Session 3
Lakeside 18/6/09 Session 4 (red flagged)
Lakeside 18/6/09 Session 5 (Current PB)
Lakeside 31/5/09 Session 1
Lakeside 31/5/09 Session 2
Lakeside 31/5/09 Session 3
Lakeside 31/5/09 Session 4
Lakeside 31/5/09 Session 4 (red flagged)
Lakeside 31/5/09 Session 5
Lakeside 3/5/09 Session 2
Lakeside 3/5/09 Session 3
Lakeside 3/5/09 Session 4

Queensland Raceway footage:
QR 6/12/08 Session 1
QR 1/11/08 Session 1
QR 1/11/08 Session 3
QR 19/10/08 Session 2
QR 19/10/08 Session 3
QR 6/9/08 Session 3
QR 5/4/08 Session 1
QR 5/4/08 Session 2
QR 26/1/08 Session 1

Early track run with old street tyres from a chase car - QR Sprints - April 2008

Pics of the Gazelle in action at Lakeside:

Pics of the CA20DET thanks to WWW.MARSTA.COM:

Track Pics of the car again thanks to WWW.MARSTA.COM:

datso · Post by **datso** » Tue Mar 23, 2010 1:41 pm

Candellan it seems this car still has some better times than your new SR20det one is able to do?

Katsumi · Post by **Katsumi** » Sun Aug 12, 2012 9:03 pm

Interesting engine,
Does he have a piston ground cooling?

The differences of the S12 CA20E (?) block interest me to the S13 Ca18det.
Are the differences known to you, have they already compared them? (apart from bore and stroke)

Candellan · Post by **Candellan** » Fri Aug 17, 2012 5:22 pm

This car is now up for grabs here - http://s12silvia.com/community/index.ph ... vegas-qld/

Datso: Yeah the Green Machine is still in development with no steering or suspension setup, only just has the SR rebuilt. It should do under 60 sec at Lakeside with ease.

Katsumi: No under piston cooling. It's never been an issue. Oil temp runs at 90degC. The only problems have been cheap pistons breaking ring lands, which was cured by using ACL pistons. Other than the obvious bore & stroke differences, the front of the CA18DET block is different where the twin cam timing belt idler pulley goes around the water pump, it's missing on the SOHC block, also larger diameter & depth of the head bolts.

TDM Racing · Post by **TDM Racing** » Fri Aug 17, 2012 7:08 pm

How long since the pistons were done, When was the last time it was run, apart from no rear seats/coil over rear end, what else is stopping roadworthy? Got a mate who might be interested. THanks

Candellan · Post by **Candellan** » Fri Aug 17, 2012 9:13 pm

New pistons installed May 2009. The engine was last run in Feb 2010 when the Green Machine arrived. The roadworthy issues are mainly to do with what front suspension/brakes you want to run & the that I've added extension tubes to the rear shock mounts. Also needs a new spedo cable. Everything may be covered with engineering certificates.

SFort · Post by **SFort** » Sat Aug 18, 2012 10:45 am

What rad were you running in that car? Looks stockish

Candellan · Post by **Candellan** » Sat Aug 18, 2012 3:10 pm

Well spotted. It's the original recored with a few rows missing on the left for the intercooler pipes to pass through. Keeps the engine at 80-90degC all day on track or off.

SFort · Post by **SFort** » Sat Aug 18, 2012 7:10 pm

Interesting. I might not need to get a big alloy one after all.

TDM Racing · Post by **TDM Racing** » Sat Aug 18, 2012 8:54 pm

s13 radiators are a little bit bigger aren't they? A new core will suffice for most daily/track/weekenders.