1978 Isuzu Gemini Coupe
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- Long Term Member
- Posts: 1452
- Joined: Tue Aug 16, 2005 4:31 pm
- Location: Auckland, New Zealand
- Contact:
1978 Isuzu Gemini Coupe
I'm bored at work so I thought I might write this up. I don't have any current pictures, but I'll take some next week when I have the car back in my possession.
Engine
Isuzu G161z
G200z crank
Bored to 86mm
O-Ringed Block
Arias SR20DET forged pistons (Gemracing)
Shotpeened G161z rods (Gemracing)
Fully balanced bottom end
Ported and polished G161z head
Oversized intake and exhaust valves
3 angle valve grind
Custom turbo cam
Double valve springs
Head shaved to reduce combustion chamber size
8.0:1 compression
Intake & Exhaust
4ZE1 injection manifold and plenum
XF Falcon throttle body forwards mounted
High mount tuned length exhaust manifold
Mitsubishi Evo 1 510cc injectors
Garrett ball bearing T3 turbo (R33 Skyline)
Custom down pipe
Mitsubishi E38 VR-4 Intercooler
2.5" exhaust from turbo back
XF Falcon idle control valve
Ignition & ECU
Link LEM G3 ECU
G-EFI 12-1 toothed wheel CAS
Holden Commodore VR sensor pickup
Subaru Legacy coil pack
Link ignition module
Running a wasted spark setup
Fuel System
Custom 1.5 litre surge tank
Bosch 300hp external fuel pump
Standard Isuzu in-tank lift pump
Sard rising-rate fuel regulator
Standard 4ZE1 fuel rail
Gearbox & Driveline
Gemini 5 speed gearbox
Lightened G161z flywheel
Exedy heavy duty clutch
Custom 2 piece driveshaft
Toyota Hilux differential with restudded axles
4.44 LSD
Custom ladder bar type setup
Suspension
Billet springs at all 4 corners
450lb front springs
250lb rear springs
New polyurathane bushings all round
Whiteline front swaybar (non-adjustable)
Tokico front shocks
Munroe rear shocks
*Shocks are soon to be replaced with adjustables
Brakes
Hopper Stoppers 1" master cyclinder
Front
VT Commodore 298mm rotors, 4 stud
VT Commodore 2-pot calipers
Rear
EA Falcon discs
EA Falcon calipers
Wheels & Tyres
Konig Rewinds, Gunmetal, 15x7"
Goodyear Eagle F1 GS-D3 195/50/15
Exterior
Original Canery Yellow paint
Yellow primer
Surface rust!
Mirrors removed
Australian TD grille, black
Round headlights
Round headlight surrounds, black
Directional speed arrows!
Interior
Knox Auto Carpets black plush pile carpet
Rear seat removed
Racepro fixed-back Arrow 1 driver seat (grey/black)
Racepro fixed-back Arrow 2 passenger seat (yellow/black)
6 point 1/2 cage w/ side intrusion bars
Autogauge 3 1/4" tachometer
Autogauge 2" boost gauge
Autogauge 2" oil pressure gauge
Autogauge 2" water temperature gauge
(all mounted in gearbox console)
Custom blue door cards
That's all I can think of for now. Will get pics up ASAP.
Cheers.
Engine
Isuzu G161z
G200z crank
Bored to 86mm
O-Ringed Block
Arias SR20DET forged pistons (Gemracing)
Shotpeened G161z rods (Gemracing)
Fully balanced bottom end
Ported and polished G161z head
Oversized intake and exhaust valves
3 angle valve grind
Custom turbo cam
Double valve springs
Head shaved to reduce combustion chamber size
8.0:1 compression
Intake & Exhaust
4ZE1 injection manifold and plenum
XF Falcon throttle body forwards mounted
High mount tuned length exhaust manifold
Mitsubishi Evo 1 510cc injectors
Garrett ball bearing T3 turbo (R33 Skyline)
Custom down pipe
Mitsubishi E38 VR-4 Intercooler
2.5" exhaust from turbo back
XF Falcon idle control valve
Ignition & ECU
Link LEM G3 ECU
G-EFI 12-1 toothed wheel CAS
Holden Commodore VR sensor pickup
Subaru Legacy coil pack
Link ignition module
Running a wasted spark setup
Fuel System
Custom 1.5 litre surge tank
Bosch 300hp external fuel pump
Standard Isuzu in-tank lift pump
Sard rising-rate fuel regulator
Standard 4ZE1 fuel rail
Gearbox & Driveline
Gemini 5 speed gearbox
Lightened G161z flywheel
Exedy heavy duty clutch
Custom 2 piece driveshaft
Toyota Hilux differential with restudded axles
4.44 LSD
Custom ladder bar type setup
Suspension
Billet springs at all 4 corners
450lb front springs
250lb rear springs
New polyurathane bushings all round
Whiteline front swaybar (non-adjustable)
Tokico front shocks
Munroe rear shocks
*Shocks are soon to be replaced with adjustables
Brakes
Hopper Stoppers 1" master cyclinder
Front
VT Commodore 298mm rotors, 4 stud
VT Commodore 2-pot calipers
Rear
EA Falcon discs
EA Falcon calipers
Wheels & Tyres
Konig Rewinds, Gunmetal, 15x7"
Goodyear Eagle F1 GS-D3 195/50/15
Exterior
Original Canery Yellow paint
Yellow primer
Surface rust!
Mirrors removed
Australian TD grille, black
Round headlights
Round headlight surrounds, black
Directional speed arrows!
Interior
Knox Auto Carpets black plush pile carpet
Rear seat removed
Racepro fixed-back Arrow 1 driver seat (grey/black)
Racepro fixed-back Arrow 2 passenger seat (yellow/black)
6 point 1/2 cage w/ side intrusion bars
Autogauge 3 1/4" tachometer
Autogauge 2" boost gauge
Autogauge 2" oil pressure gauge
Autogauge 2" water temperature gauge
(all mounted in gearbox console)
Custom blue door cards
That's all I can think of for now. Will get pics up ASAP.
Cheers.
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- Long Term Member
- Posts: 1452
- Joined: Tue Aug 16, 2005 4:31 pm
- Location: Auckland, New Zealand
- Contact:
I finally got this home from the tuners today.
It's made 106rwkw on the running in tune @ 5500 rpm.
The rev limit is also set at 5500rpm so lots of room for improvement with a decent tune and the rev limit put up to where it should be.
I'll get some pics this weekend after I've finished grinning at it
It's made 106rwkw on the running in tune @ 5500 rpm.
The rev limit is also set at 5500rpm so lots of room for improvement with a decent tune and the rev limit put up to where it should be.
I'll get some pics this weekend after I've finished grinning at it
-
- Long Term Member
- Posts: 1452
- Joined: Tue Aug 16, 2005 4:31 pm
- Location: Auckland, New Zealand
- Contact:
It was raining this weekend so unfortunately I didn't get any pictures.
I'm starting to get used to driving it now, goes very well
Problems to fix:
Getting hotter than I'd like = better cooling fans, oil cooler
Diff mount hitting floor pan = bash floor pan
Rear rims rubbing (gives that supercharger whirr ) = roll guards out
Clunking noise from rear = make sure all bolts are tight/might just be diff hitting floor.
I'm starting to get used to driving it now, goes very well
Problems to fix:
Getting hotter than I'd like = better cooling fans, oil cooler
Diff mount hitting floor pan = bash floor pan
Rear rims rubbing (gives that supercharger whirr ) = roll guards out
Clunking noise from rear = make sure all bolts are tight/might just be diff hitting floor.
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- Long Term Member
- Posts: 1452
- Joined: Tue Aug 16, 2005 4:31 pm
- Location: Auckland, New Zealand
- Contact:
I think it might be the exhaust hitting the diff or the floor pan.. will be able to find out once it's on the hoist. I got rid of some of the clunk by figuring out that the bushes in the lower of the rear shocks were too large and it was rattling around. Sorted that out.
I gave the floor pan a good bash where the diff mount was hitting it but it's still hitting a tad... will have to bash it out some more.
Rolled the guards too but I think they're still scrubbing at the back
I gave the floor pan a good bash where the diff mount was hitting it but it's still hitting a tad... will have to bash it out some more.
Rolled the guards too but I think they're still scrubbing at the back
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- Long Term Member
- Posts: 1452
- Joined: Tue Aug 16, 2005 4:31 pm
- Location: Auckland, New Zealand
- Contact:
Well I got all my modifications certified by the engineer, so I'm nearly road legal, just a few things to fix up and I'll be drivin' her around!
Here are a few pics I quickly snapped this afternon, sorry there are none of the car yet, it's packed into a car-port which is non-condusive to photography.
Here are a few pics I quickly snapped this afternon, sorry there are none of the car yet, it's packed into a car-port which is non-condusive to photography.